Dr. Jeff Masters' WunderBlog

TD 16 organizing; Mexican landslide kills hundreds; hottest day ever in Los Angeles
Posted by: Dr. Jeff Masters, 7:25 PM GMT on September 28, 2010 +6
The large area of low pressure centered just south of Cuba's Isle of Youth has developed enough of a well-defined circulation to be classified as Tropical Depression Sixteen, and is likely to become Tropical Storm Nicole by Wednesday. The depression has a very broad center, with little heavy thunderstorm activity near the center, and is this very dissimilar to the usual types of tropical depressions we see in the Atlantic. The large size, broad center, and lack of heavy thunderstorm activity near the center of TD 16 will limit the storm's ability to rapidly intensify. TD 16 resembles the "monsoon depressions" common in India's Bay of Bengal or the Western Pacific. A monsoon depression is similar to a regular tropical depression in the winds that it generates--about 30 - 35 mph near the outer edges (and usually stronger on the eastern side of the circulation.) Monsoon depressions have large, calm centers, and can evolve into regular tropical storms, if given enough time over water to develop a tight, closed circulation. Today's monsoon-like depression in the Caribbean was able to form because the atmospheric flow pattern of the Eastern Pacific has shifted eastwards into the Western Caribbean, bringing in the Eastern Pacific ITCZ (Intertropical Convergence Zone, a region of converging surface winds that creates a band of strong thunderstorms). This unusual flow pattern is forecast to remain in place for at least the next ten days.

An Air Force hurricane hunter aircraft has been flying at 700 feet in TD 16 since 1:30pm EDT, and has thus far found a central pressure of 999 mb. The strongest winds at flight level seen as of 3:20pm EDT were 32 mph, located about 100 miles east of the center of TD 16. Surface observations show that the strongest winds at any surface station continue to be at Buoy 42057, several hundred miles to the southeast of TD 16's center. Winds were 27 mph, gusting to 34 mph at 2:43pm EDT this afternoon. Rotation of TD 16 can be seen on radar loops out of Pico San Juan, Cuba, and well as satellite imagery. The heavy thunderstorms are currently quite disorganized, but a curved band is beginning to wrap around the north side of the center, signaling that TD 16 is growing more organized. TD 16 has brought torrential rains to the Cayman Islands, Jamaica, Cuba, and Honduras today.


Figure 1. Radar-estimated precipitation for South Florida and Cuba. TD 16 has brought 2 - 4 inches of rains to the region.

Forecast for TD 16
Because TD 16 is so large, it will take more time than a typical depression for it to spin up into a strong tropical storm. Given that the steering currents are expected to pull TD 16 north-northeastwards over Cuba and into South Florida and the western Bahamas on Wednesday, the storm lacks sufficient time over water to be any stronger than a 50 mph tropical storm for Florida. TD 16 is organizing pretty slowly this afternoon, and I think the top winds in Southeast Florida are most likely to be in the 25 - 35 mph range on Wednesday. Winds are likely to be stronger in the western Bahamas, perhaps 30 - 40 mph, since they will be in the stronger right front quadrant of the storm. By the time TD 16 makes landfall in South Carolina or North Carolina on Thursday morning, it could be as strong as a 50 - 60 mph tropical storm. However, wind shear will increase sharply on Thursday as TD 16 gets caught in an upper-level trough of low pressure, and NHC is giving TD 16 only a 9% chance of making it to hurricane strength before it becomes an extratropical storm on Thursday. The primary danger from TD 16 is not wind, but heavy rainfall. A potent upper-level low and stationary front over the U.S. East Coast have been pulling moist, tropical air from the Caribbean northwards over the past few days, bringing heavy rains that have saturated the soils. This is called a Predecessor Rain Event, or PRE, since it comes in advance of the actual rain shield of the storm. (A PRE from Hurricane Karl brought southern Wisconsin the heavy rain that caused the levee on the Wisconsin River to fail yesterday.) Wilmington, NC received 10.33 inches of rain yesterday, its second greatest one-day rainfall since record keeping began in 1871. Only the 13.38" that fell during Hurricane Floyd on September 15, 1999 beat yesterday's rainfall total. With TD 16 expected to bring another 6 - 8 inches of rain to the region later this week, serious flooding is likely, and flash flood watches are posted for the North Carolina/ South Carolina border region. South Florida is also under a flood watch, for 3 - 5 inches of rain. Flooding rains of similar magnitude can also be expected in Cuba, the Cayman Islands, and the Western Bahamas through Wednesday night. Both the GFDL and HWRF models are predicting that TD 16 will dump rains in excess of eight inches along narrow portions of its path in eastern Florida, South Carolina, and North Carolina.


Figure 2. Forecast precipitation for the 5-day period from 8am today through 8am EDT Sunday, October 3, 2010. Image credit: NOAA Hydrometeorological Prediction Center.

Up to 1,000 feared dead in Mexican landslide
Mexico has taken the brunt of the devastation from the hurricane season of 2010, thanks to the landfalls of this year's two deadliest and most damaging storms, Hurricanes Alex and Karl. But Mexico's worst blow yet hit this morning, when heavy rains from the remnants of Tropical Storm Matthew triggered a landslide in Mexico's mountainous Oaxaca state that buried as many as 1,000 people in Santa Maria Tlahuitoltepec, a town of 9,000. Rescuers have not reached the area yet, but hundreds are feared dead in the 300 homes that were buried by the early morning landslide. Matthew hit Belize on Saturday as a minimal tropical storm with 40 mph winds, and dissipated Sunday over southern Mexico. However, Matthew's remains stalled out over the region of Mexico that had already received torrential rains from Hurricane Karl, which hit on September 18. Satellite estimates of Matthew's rains over southern Mexico (Figure 3) show that a foot of rain may have fallen in the landslide area. Matthew's remains still linger over the region, but are probably only capable of bringing 1 - 2 inches of additional rain through Thursday.


Figure 3. Satellite-estimated rainfall for the five-day period ending at 8pm EDT Monday September 27, 2010. The dark green colors show where rainfall amounts of 300 mm (about 12 inches) fell, due to the remnants of Tropical Storm Matthew. Image credit: Navy Research Lab, Monterey.

Elsewhere in the tropics
Once TD 16 moves out of the Caribbean, the GFS model predicts that the Western Caribbean will "reload" and produce another tropical disturbance capable of developing into a tropical depression early next week. The GFS also predicts a tropical or subtropical storm will form over the Bahamas late this week, and move north-northeast along the U.S. East Coast, missing hitting land. The NOGAPS model hints at the Bahamas storm, and also predicts development of a tropical wave a few hundred miles northeast of the Lesser Antilles Islands, about a week from now.

Hottest day in Los Angeles history
The mercury hit a blistering 113°F (45.0°C) at 12:15 pm PDT yesterday in downtown Los Angeles, making it the hottest day in Los Angeles history. It may have gotten hotter, but the thermometer broke shortly after the record high was set. The previous record in Los Angeles was 112°F set on June 26, 1990; records go back to 1877. Nearby Long Beach tied its hottest all-time temperature yesterday, with a scorching 111°F. And Christopher C. Burt, our new featured blogger on weather records, pointed out to me that a station in the foothills at 1260' elevation near Beverly Hills owned by the Los Angeles Fire Department hit 119°F yesterday--the hottest temperature ever measured in the Los Angeles area, tying the 119°F reading from Woodland Hills on July 22, 2006. Yesterday's record heat was caused by an unusually large and intense upper-level high pressure system centered over Nevada that generated winds blowing from the land to the ocean, keeping the ocean from exerting its usual cooling influence. Remarkably, Los Angeles had its second coldest summer on record this year, and temperatures just five days ago were some the coldest September temperatures in the region for the past 50 years.

The remarkable summer of 2010
Wunderground is pleased to welcome a new featured blogger--weather historian Christopher C. Burt. Chris is a leading expert in the U.S. on weather records, and is author of the world's most popular weather records book published to date, Extreme Weather: A Guide and Record Book. He's spent a lifetime collaborating with like-minded individuals from around the world, and no one--including official sources such as the National Climatic Data Center and the National Extremes Committee--has done as thorough a job correlating the various weather records available and determining the most accurate extreme values of such. Each month he'll be reporting on the notable records for heat, cold, and precipitation set world-wide, and his first post takes a look at the remarkable summer of 2010. It's great to have someone like Chris who stays on top of weather extremes, and I hope you'll pay a visit to his blog and welcome him to the wunderground site!

"Hurricane Haven" airing this afternoon
My live Internet radio show, "Hurricane Haven", will be airing again today at 4pm EDT. The call in number is 415-983-2634, or you can post a question to broadcast@wunderground.com. Be sure to include "Hurricane Haven question" in the subject line.

Today's show will be about 30 minutes, and you can tune in at http://www.wunderground.com/wxradio/wubroadcast.h tml. The show will be recorded and stored as a podcast.

I'll have updates as the situation with TD 16 requires.

Jeff Masters
Alone again, naturally (ftogrf)
Lonely Seagull, as a storm associated with TD 16 is approaching.
Alone again, naturally
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1301. Tazmanian 1:10 AM GMT on September 29, 2010    
Quoting TriMOPER:
Thanks Taz



any time
Member Since: May 21, 2006 Posts: 5088 Comments: 111307
1302. Stoopid1 1:10 AM GMT on September 29, 2010    
I'll be keeping tabs on TD 16. I've got family in Daytona Beach, FL, and we're expected to get 2.5" plus here in Saratoga Springs, NY from what's left of TD 16. Going to be an interesting week.
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1303. Skyepony (Mod) 1:12 AM GMT on September 29, 2010    
Off to go watch that line of showers move in..

Hurricane statement for parts of ECFL
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1304. BahaHurican 1:12 AM GMT on September 29, 2010    
BTW, it's wonderfully clear here tonight, with light and balmy breezes (mostly from the E and SE. Quite cool it's been by comparison with some recent Sept 28's....

I'm going to look for some rain boots for tomorrow and Thursday, though. Looks like we're going to get the worst of the rain. Hope we don't have too many car accidents - pple sometimes forget that one drives differently when it's raining cows and horses as opposed to the regular cats and dogs....

Really getting a "calm before the storm" feeling...
Member Since: October 25, 2005 Posts: 19 Comments: 17588
1305. CaptnDan142 1:13 AM GMT on September 29, 2010    
Quoting pilotguy1:


Huh. I don't see a lot of forecasting here.


Too much head-scratching going on for that I think. Everybody still trying to get a handle on what it is, before they figure out what it might do.

Unusual system, and all the action from the front isn't helping to clarify matters at all.
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1306. KoritheMan 1:14 AM GMT on September 29, 2010    
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1307. Ookla 1:14 AM GMT on September 29, 2010    
Quoting stormwatcherCI:


Good night everyone. I see two areas of decent vort in the central/eastern Atlantic.

Some people have been pointing those out from time to time. There's no real chance of those getting all the way to the US, though, right? I can ignore?
Member Since: September 13, 2010 Posts: 0 Comments: 34
1308. PSLFLCaneVet 1:14 AM GMT on September 29, 2010    
Quoting Skyepony:


spathy~ I should bring my seedlings in.. Tomatoes, atleast up here started a month ago.

PSLFL~ probably not much. Like JupiterFL (who I'd guess ain't making it home) there's the porch furniture & loose ends.


True, true. Always something to keep safe from the weather. Good fortune with the seedlings.
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1310. pottery 1:15 AM GMT on September 29, 2010    
Quoting BahaHurican:
BTW, it's wonderfully clear here tonight, with light and balmy breezes (mostly from the E and SE. Quite cool it's been by comparison with some recent Sept 28's....

I'm going to look for some rain boots for tomorrow and Thursday, though. Looks like we're going to get the worst of the rain. Hope we don't have too many car accidents - pple sometimes forget that one drives differently when it's raining cows and horses as opposed to the regular cats and dogs....

Really getting a "calm before the storm" feeling...

Nice and clear skies here too the last few nights, Baha.
The MilkyWay was fantastic last night.
Hope the rains are not too heavy, when they get there....
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1311. Seastep 1:15 AM GMT on September 29, 2010    
Quoting kmanhurricaneman:
i believe from analysing sat images there were three LLC's nhc has one targeted right that will be moving over cuba and into florida the other two has consolidated and is located just west of jamaica, this will be where nicole is born, movement will be to the east possible over jamaica then over the eastern most part of cuba over the T&C islands skirt the east coast of florida and into carolina's as a cat 2 hurricane, i hope iam wrong but thats my take. ps dont flame me or call me names I WILL RETALIATE....... thank you LOL


It ain't that kinda room tonight... relax.
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1312. CaptnDan142 1:18 AM GMT on September 29, 2010    
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1313. Bordonaro 1:18 AM GMT on September 29, 2010    

Let me spell this out:
1) A stationary front stalled over C FL, with a deep trough of Low pressure off to your west..
2) Upper level winds are SE east of the front and SW behind the front= wind shear= rotating cells, possible tornadoes..
3) TD 16 pumping up deep tropical moisture from the SE piling up in front of the stationary front = torrential rain.

Please, keep a close eye on this weather for the next 36 hrs!!!
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1314. surfmom 1:18 AM GMT on September 29, 2010    
Quoting CaptnDan142:


Actually, the only one I have ever really gotten close to ignoring is off tonight.

Everybody is worth listening to - just for different reasons.
;-)
ahunnnn - I'd say that works for me too - fascinating studying the weather inside & out~

TD16 doesn't bring any wave play to SWFL : (
- only "Blast in the Brine"* (*thx Pottery) we will see on the Gomex will have lots of N/NE winds on it (: ( Thursday (the only day) with a NW fetch. Gulf Temp 86
No wet suits : )
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1315. KBH 1:18 AM GMT on September 29, 2010    
does anyone have any projected rainfall amounts for this system east of B'dos?
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1316. CosmicEvents 1:18 AM GMT on September 29, 2010    
Quoting pilotguy1:
Let's see can we have a post about the weather?
I'd have to say that the lesson to be learned here is not to get hyper over the 7-14 day out models. 7-14 days ago we were looking at a Category Catastrophe Hurricane and instead it looks like a Category zero possible rain and flooding event. Those computer spitballs didn't hit their target, this time. Those pesky models appaantly failed to measure the strength of the trof. Perhaps some actual obs from long-range G-IV missions might have helped improve the model output.
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1317. OctaviaStreet 1:20 AM GMT on September 29, 2010    
Quoting BahaHurican:
Really getting a "calm before the storm" feeling...


Funny you should say that . . . . It's what prompted me to wax Shakespearian with the gentle rain from heaven bit.

Thanks to Presslord's reminder, I have a 5-gallon bucket out there and a ruler on the kitchen counter. Tomorrow I'll post just how gentle it was through the night.
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1319. kmanislander 1:21 AM GMT on September 29, 2010    
Good evening all

This TD has lead me to question some of the graphics I have been seeing online. For instance look at the graphic below for sea level pressure.

It shows the 1004 mb isobar passing right through Grand Cayman approximately yet we know that all afternoon and currently the pressure has been sub 1000 mb. In fact it is 998 right now. Who comes up with these images and on what basis ?. This one is obviously incorrect.

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1320. pottery 1:21 AM GMT on September 29, 2010    
Quoting kmanhurricaneman:
i believe from analysing sat images there were three LLC's nhc has one targeted right that will be moving over cuba and into florida the other two has consolidated and is located just west of jamaica, this will be where nicole is born, movement will be to the east possible over jamaica then over the eastern most part of cuba over the T&C islands skirt the east coast of florida and into carolina's as a cat 2 hurricane, i hope iam wrong but thats my take. ps dont flame me or call me names I WILL RETALIATE....... thank you LOL

I think that a Cat.2 is a bit overblown ...
The storm will cross Cuba and be affected by the terrain there, and skirt the Florida coast as well....
Cat1 at the most, IMO.
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1321. doorman79 1:21 AM GMT on September 29, 2010    
Evening Everyone!
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1322. LakeWorthFinn 1:22 AM GMT on September 29, 2010    
Hi everybody, Lake Worth here, SE Palm Beach County, FL. Winds picking up, we've already had some minor flooding tonight.
I'm looking forward to a Fay or Ernesto-type storm, we need water badly :)
However, as nash wisely said, NOOA weather radios on alert mode for possible tornadoes. For those who are new here and think this will be no big deal (I hope they are right), I warmly recommend to be safe by listing to the advisories and please, do not drive on flooded roads. Remember that TS Fay killed people who didn't heed the warnings and either went surfing or drove their vehicles to flood areas thinking there was a road beneath their car and got stuck. It's not the wind that'll be the biggest threat, it's the rip currents and flooding when you can't see where the road is and you'll might get into trouble.
Stay safe and prepared, every storm is potentially dangerous, STD, TD or a named storm will spawn unexpected tornadoes more often than than not.
Thanks for all the great info you're posting on this blog :)
Member Since: October 6, 2005 Posts: 66 Comments: 6956
1323. InTheCone 1:22 AM GMT on September 29, 2010    
Quoting KoritheMan:
For anyone interested, here's my latest blog entry on TD16. Tell me what you think.


Nice write up, thanks. ASCAT was blank, but that just may be my browser.
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1325. GrillinInTheEye 1:24 AM GMT on September 29, 2010    
Off to bed all, I have a golf course to look at in the morning. Be well and Be safe. And lastly have some fun.
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1326. Bordonaro 1:24 AM GMT on September 29, 2010    
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1327. pottery 1:25 AM GMT on September 29, 2010    
Quoting kmanislander:
Good evening all

This TD has lead me to question some of the graphics I have been seeing online. For instance look at the graphic below for sea level pressure.

It shows the 1004 mb isobar passing right through Grand Cayman approximately yet we know that all afternoon and currently the pressure has been sub 1000 mb. In fact it is 998 right now. Who comes up with these images and on what basis ?. This one is obviously incorrect.


Good point!
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1328. dader 1:25 AM GMT on September 29, 2010    
Its so radical when the Weather Channel plays Eric Johnson's "Cliffs of Dover" for the local forecast background music.

They have a great mix in there- some past faves are Shine on You Crazy Diamond, Papa was a Rolling Stone, and the ten Phish songs they mix in.

Someone at the TWC has great taste in music- even the jazzy music is tight.
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1329. kmanhurricaneman 1:25 AM GMT on September 29, 2010    
Quoting pottery:

I think that a Cat.2 is a bit overblown ...
The storm will cross Cuba and be affected by the terrain there, and skirt the Florida coast as well....
Cat1 at the most, IMO.
well borderline cat 2 i meant
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1330. Seastep 1:26 AM GMT on September 29, 2010    
Kman - remember that it is MSLP.

But, yeah, pressures were that low all over...
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1331. RevInFL 1:26 AM GMT on September 29, 2010    
Wind has picked-up after a day full of rain here in Titusville, FL. Rain gauge had 2 inches in it. My anemometer just registered a gust of a whole 18mph. My road is already flooding and there are reports from just south of me of low-lying areas have 6 inches of standing water. Yes this storm may not be named ever, but flooding and Florida are two words we Floridians don't like to hear together.
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1333. LBAR 1:27 AM GMT on September 29, 2010    
Beautiful sunset here in Charleston, SC...gorgeous pink, red, blue sky and clouds with a HUGE rainbow hovering overhead. If I had a camera with me!!! *sigh*
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1334. lilElla 1:27 AM GMT on September 29, 2010    
Quoting InTheCone:
Just jumpin' in out of lurking to say thanks for the great blog tonite - best of the year! Great job everyone!


Agreed! :)
Stay safe.
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1335. bcycsailor 1:27 AM GMT on September 29, 2010    
Quoting InTheCone:
Just jumpin' in out of lurking to say thanks for the great blog tonite - best of the year! Great job everyone!


+ 1 :>) Although I worry for anyone being affected by this crazy system, I enjoy a bit of humor with my weather-watching. Plus, when I'm not learning something, I'm generally laughing at some of the posts. btw, mostly a lurker myself...
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1336. CybrTeddy 1:28 AM GMT on September 29, 2010    
If TD16 exceeds 60 mph I would be shocked.

45 at best, heck.. 40 even.
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1337. PSLFLCaneVet 1:28 AM GMT on September 29, 2010    
Quoting LakeWorthFinn:
Hi everybody, Lake Worth here, SE Palm Beach County, FL. Winds picking up, we've already had some minor flooding tonight.
I'm looking forward to a Fay or Ernesto-type storm, we need water badly :)
However, as nash wisely said, NOOA weather radios on alert mode for possible tornadoes. For those who are new here and think this will be no big deal (I hope they are right), I warmly recommend to be safe by listing to the advisories and please, do not drive on flooded roads. Remember that TS Fay killed people who didn't heed the warnings and either went surfing or drove their vehicles to flood areas thinking there was a road beneath their car and got stuck. It's not the wind that'll be the biggest threat, it's the rip currents and flooding when you can't see where the road is and you'll might get into trouble.
Stay safe and prepared, every storm is potentially dangerous, STD, TD or a named storm will spawn unexpected tornadoes more often than than not.
Thanks for all the great info you're posting on this blog :)


Good points. May fortune favor you and yours.
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1338. Seastep 1:28 AM GMT on September 29, 2010    
Quoting kmanislander:
Good evening all

This TD has lead me to question some of the graphics I have been seeing online. For instance look at the graphic below for sea level pressure.

It shows the 1004 mb isobar passing right through Grand Cayman approximately yet we know that all afternoon and currently the pressure has been sub 1000 mb. In fact it is 998 right now. Who comes up with these images and on what basis ?. This one is obviously incorrect.



Also, kinda goes to my "calibration" of recon. They had 1001mb at GC while you, and other surface obs were showing 998mb at the time.

I believe the coc is really 995mb as of the last update because of just that.
Member Since: September 9, 2008 Posts: 6 Comments: 3406
1339. Bordonaro 1:28 AM GMT on September 29, 2010    
Quoting LakeWorthFinn:
Hi everybody, Lake Worth here, SE Palm Beach County, FL. Winds picking up, we've already had some minor flooding tonight.
I'm looking forward to a Fay or Ernesto-type storm, we need water badly :)
However, as nash wisely said, NOOA weather radios on alert mode for possible tornadoes. For those who are new here and think this will be no big deal (I hope they are right), I warmly recommend to be safe by listing to the advisories and please, do not drive on flooded roads. Remember that TS Fay killed people who didn't heed the warnings and either went surfing or drove their vehicles to flood areas thinking there was a road beneath their car and got stuck. It's not the wind that'll be the biggest threat, it's the rip currents and flooding when you can't see where the road is and you'll might get into trouble.
Stay safe and prepared, every storm is potentially dangerous, STD, TD or a named storm will spawn unexpected tornadoes more often than than not.
Thanks for all the great info you're posting on this blog :)

AWESOME post. Folks, it will be a flooding rain event for portions of FL and my concern is about the possible tornadoes threat. It is a combination of a TS and a bad cold front moving through at one time.
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1340. Kristina40 1:29 AM GMT on September 29, 2010    
Is the stuff hitting Florida now part of TD 16? I've been at work and haven't had any updates today.
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1341. CaptnDan142 1:30 AM GMT on September 29, 2010    
Quoting pottery:

I think that a Cat.2 is a bit overblown ...
The storm will cross Cuba and be affected by the terrain there, and skirt the Florida coast as well....
Cat1 at the most, IMO.


Considering how far away from the center the higher winds are, I am thinking even Cat 1 might be a stretch. From the way it has been reported, the winds that are close to TS are pretty isolated and well away from the center.

I just don't see it happening, unless the structure of the storm changes dramatically.
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1343. pottery 1:30 AM GMT on September 29, 2010    
Quoting KBH:
does anyone have any projected rainfall amounts for this system east of B'dos?

I dont ..
but it would be good to see a link for that.
Anyone??

The current Rainfall maps are showing 5-10 mm/day over the Islands. But the map does not show the area at about 45W
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1344. InTheCone 1:30 AM GMT on September 29, 2010    
Incoming to my locale...
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1345. AWeatherLover 1:32 AM GMT on September 29, 2010    
Just out from lurking to mention that today's blog has been rather uneventful in terms of bickering that we've seen a lot lately. It's a refreshing change and I hope we keep it that way. Awesome blogging!
Also, I noticed some of the models shifting west a tad. What is the consensus on this? Are we looking more towards a landfall on the extreme southern west coast or will it skirt Florida to the east?
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1346. padirescu 1:32 AM GMT on September 29, 2010    
"Quoting LakeWorthFinn:
Hi everybody, Lake Worth here, SE Palm Beach County, FL. Winds picking up, we've already had some minor flooding tonight.
I'm looking forward to a Fay or Ernesto-type storm, we need water badly :)
"

Really? We need water in SE Palm Beach County? It's been raining almost daily in Loxahatchee and this additional accumulation will not help with already heightened water tables.
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1347. surfmom 1:33 AM GMT on September 29, 2010    
Quoting kmanislander:
Good evening all

This TD has lead me to question some of the graphics I have been seeing online. For instance look at the graphic below for sea level pressure.

It shows the 1004 mb isobar passing right through Grand Cayman approximately yet we know that all afternoon and currently the pressure has been sub 1000 mb. In fact it is 998 right now. Who comes up with these images and on what basis ?. This one is obviously incorrect.


glad SOMEONE is awake - good & a bit concerning point. I always assumed (dangerous word) the information on maps were correct...
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1348. Seastep 1:33 AM GMT on September 29, 2010    
Quoting CaptnDan142:


Considering how far away from the center the higher winds are, I am thinking even Cat 1 might be a stretch. From the way it has been reported, the winds that are close to TS are pretty isolated and well away from the center.

I just don't see it happening, unless the structure of the storm changes dramatically.


Yep. Anything is possible, but it's a rain event for FL. Just too large to get that kind of spin on.
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1349. StormHype 1:33 AM GMT on September 29, 2010    
Quoting Bordonaro:

AWESOME post. Folks, it will be a flooding rain event for portions of FL and my concern is about the possible tornadoes threat. It is a combination of a TS and a bad cold front moving through at one time.


Bad cold front? It's pretty much a dead cold front. This front is on the other end of the spectrum from the one that came through with Wilma. In fact, it seems to be moving backwards, to the NW, the last few hours.
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1350. zoomiami 1:33 AM GMT on September 29, 2010    
Evening everyone.

If you look at the graphic Bordonaro posted 1313 - you will see that the severe weather north of Dade county is from the front that is providing the pathway for TD16.

The rain is magnified by the tropical moisture to the south, leading to the unstable atmosphere. As most know, just the passage of a cold front can cause the kind of weather that is happening, especially north of West Palm.

Not a good setup, because those that already have the rain from the front, will be getting more from TD16/TS Nicole tomorrow.
Member Since: August 13, 2007 Posts: 10 Comments: 4064
1351. leo305 1:33 AM GMT on September 29, 2010    
lol jim cantore is having a panic attack because TD 16 doesn't look good on satellite
Member Since: April 17, 2010 Posts: 0 Comments: 1752

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About JeffMasters
Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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