Dr. Jeff Masters' WunderBlog

Typhoon Roke batters Japan; Ophelia forms in the Central Atlantic
Posted by: Dr. Jeff Masters, 1:28 PM GMT on September 21, 2011 +18
Typhoon Roke hit Japan near Hamamatsu at 14:00 JST Wednesday as a Category 1 typhoon with 80 mph winds. Roke brought sustained winds of 62 mph, gusting to 83 mph to the Tokyo airport at 5:25 pm local time, and a wind gust of 89 mph was reported at Shizuhama Airbase. Roke has dumped heavy rains of 155 mm (6.20") at Hamamatsu and 125 mm (4.86") at Tokyo. Damage due to flooding from Roke's heavy rains will likely be the main problem from Roke, as the soils over much of Japan are saturated from the passage of Tropical Storm Talas during the first week of September. Talas was a very slow moving storm, and brought extreme rainfall amounts of over six feet to some portions of Japan. Roke brought winds less than 25 mph to the damaged Fukishima-Dai-Iche nuclear plant northeast of Tokyo, and heavy rains of 189 mm (7.50") to Hirono, located 8 miles south of the plant.


Figure 1. Radar image of Typhoon Roke as it made landfall at 14:00 JST on September 21, 2011. The typhoon brought a large area of rainfall of 50 mm/hr (2"/hr) to Japan. Image credit: Japan Meteorological Agency.


Figure 2. MODIS image of Typhoon Roke taken at 3:55 UTC on Wednesday, September 21, 2011. At the time, Roke was a Category 1 storm with 80 mph winds. Image credit: NASA.

Tropical Storm Ophelia forms in the Atlantic
Tropical Storm Ophelia formed last night in the Central Atlantic from the tropical wave (Invest 98L) we've been tracking this week. Satellite imagery shows that Ophelia is suffering the classic symptoms of high wind shear, with the low level center of circulation exposed to view, and the storm's heavy thunderstorms pushed to the northeast side of the center of circulation. An analysis of wind shear from the University of Wisconsin CIMMS group shows a high 20 - 30 knots of wind shear due to strong upper level west-southwesterly winds affecting Ophelia. We don't have any ship, buoy, or hurricane hunter observations of Ophelia's winds, but an ASCAT pass from 7:27 pm EDT last night found top winds of 45 mph in the northeast quadrant of the storm. Ophelia will be passing south of buoy 41041 late tonight. Water vapor satellite images show dry air to the the west of Ophelia, and the strong upper level west-southwesterly winds bringing high wind shear to the storm are also injecting dry air into the storm's core, interfering with development.


Figure 3. Morning satellite image of Ophelia showing the low-level center exposed to view, with all the storm's heavy thunderstorms pushed to the northeast side.

Forecast for Ophelia
The latest SHIPS model forecast predicts that Ophelia will experience moderate to high wind shear of 10 - 25 knots over the next five days, and will move into a region with drier air. The combination of shear and dry air should keep Ophelia from strengthening, and could dissipate the storm, as predicted by the ECMWF and HWRF models. The Northern Lesser Antilles could see some wind gusts of 30 - 40 mph and heavy rain squalls from Ophelia on Saturday and Sunday, but right now it looks unlikely that the islands would see sustained tropical storm force winds of 39+ mph, since they are likely to be on Ophelia's weaker (dry) side. At longer ranges, Bermuda will have to keep an eye on Ophelia, since a large cut-off low pressure system over the Eastern U.S. should turn Ophelia to the northwest and then north early next week. Ophelia may eventually be a threat to Canada, but it is too early to assess the odds of this happening.

Ophelia is the 15th named storm this year, putting 2011 in 10th place for the most number of named storms in a year. Ophelia's formation date of September 21 puts 2011 in 4th place for earliest date of arrival of the season's 15th storm. Only 2005, 1936, and 1933 had an earlier 15th storm. With only three of this year's fifteen storms reaching hurricane strength, though, this year has been near average for destructive potential. Atlantic hurricane records go back to 1851.

Jeff Masters
Categories: Hurricane
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151. jascott1967 7:01 PM GMT on September 21, 2011    
Quoting basti11:


its not a joke im afraid south fla and the keys are in real trouble for october...im talking formation right after the other...i would not at all be surprised for south fla to get hit 3 times in october..


Guess I need to cancel my vacation I had planned for Palm Beach.
Member Since: August 16, 2007 Posts: 0 Comments: 516
152. Tazmanian 7:02 PM GMT on September 21, 2011    
google earth 6.1 is out


you most un stall 6.0 too in stall it has it will not upgrade when you hit updates



Link
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153. CaribBoy 7:05 PM GMT on September 21, 2011    
I like bad weather so much! When it's always sunny, it's boring and i feel depressive! lol
Member Since: October 6, 2007 Posts: 0 Comments: 2848
155. CaribBoy 7:06 PM GMT on September 21, 2011    
i'm at 18N 63W do you think Ophelia will bring me something interesting ? something to make me happy..
Member Since: October 6, 2007 Posts: 0 Comments: 2848
156. CitikatzSouthFL 7:07 PM GMT on September 21, 2011    
Quoting basti11:


its not a joke im afraid south fla and the keys are in real trouble for october...im talking formation right after the other...i would not at all be surprised for south fla to get hit 3 times in october..

well, aren't you just the little ray of sunshine for us in S. FL? We shall see. I figure something might hit, but not the doom and gloom and disaster you are predicting.
Member Since: August 14, 2009 Posts: 0 Comments: 293
157. BVI 7:08 PM GMT on September 21, 2011    
Quoting CaribBoy:
i'm at 18N 63W do you think Ophelia will bring me something interesting ? something to make me happy..


which island?
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159. scott39 7:09 PM GMT on September 21, 2011    
Except for the great Wilma in 2005, Fl. fairs pretty well during October with NOT getting hit by a TC.
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160. hcubed 7:13 PM GMT on September 21, 2011    
Quoting CitikatzSouthFL:

well, aren't you just the little ray of sunshine for us in S. FL? We shall see. I figure something might hit, but not the doom and gloom and disaster you are predicting.


Considering he has no proof of his "20 years of experience", I'd wager that you're probably safe.

That being said, no areas of the US should let down their guard. Season's not over yet...
Member Since: May 18, 2007 Posts: 286 Comments: 1639
161. CaribBoy 7:17 PM GMT on September 21, 2011    
Quoting WeatherWx:


Move to south FL. According to basti11, the forecasting genius, its gonna get hit by a train of hurricanes next month


LOL FUNNY
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162. CaribBoy 7:17 PM GMT on September 21, 2011    
Quoting BVI:


which island?


sxm
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163. nrtiwlnvragn 7:17 PM GMT on September 21, 2011    
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164. JLPR2 7:18 PM GMT on September 21, 2011    
If Ophelia manages to hang on to her intensity of 60mph sh might be able to push the season to 75-77 in terms of ACE.

So far: 0.7825 10^4 kt^2
Member Since: September 4, 2007 Posts: 7 Comments: 7487
165. caneman 7:20 PM GMT on September 21, 2011    
Say YES to dry air intrusion.
YES to wind shear!
NO to more tropical waves.
Member Since: May 27, 2003 Posts: 14 Comments: 98
166. TropicTraveler 7:21 PM GMT on September 21, 2011    
Quoting CaribBoy:
i'm at 18N 63W do you think Ophelia will bring me something interesting ? something to make me happy..


"Jubilation, she loves me again
I fall on the floor and I'm laughing.
Jubilation, she loves me again.
I fall on the floor and I'm laughing....

Simon and Garfunkle and the song of the day
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167. GTcooliebai 7:22 PM GMT on September 21, 2011    




Would be interesting if FL. resorted back to the 1800's, a time where activity was very low for the state.
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168. DFWjc 7:22 PM GMT on September 21, 2011    
Quoting hcubed:


Considering he has no proof of his "20 years of experience", I'd wager that you're probably safe.

That being said, no areas of the US should let down their guard. Season's not over yet...


Agreed, I said two blogs ago that activity in the Western portion of the Caribbean would produce a storm that would curve over Cuba and head towards Southern Florida or the Bahamas...(the time now would be 8-10 days counting down from what i predicted a week ago).
Member Since: July 19, 2011 Posts: 1 Comments: 967
169. CaribBoy 7:24 PM GMT on September 21, 2011    
I'm praying for a GDFL track !! lol
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171. CaribBoy 7:27 PM GMT on September 21, 2011    
THINGS DRY OUT FOR FRI AND SAT WITH JUST ISOLD CONVECTION ACROSS
WRN/SWRN PR. TS OPHELIA FCST TO PASS WELL NORTHEAST OF THE AREA
AND ATTM IT DOES NOT PRESENT A THREAT FOR OUR AREA. BEST CHANCE
FOR SHRA/TSRA ON SUN AS AREA BECOMES UNDER A COL AREA WITH SEA
BREEZE XPCD TO BECOME ACTIVE. HAVE REDUCED POPS IN THE EXTENDED
GIVEN THAT OPHELIA WILL LIKELY BE WELL AWAY FROM THE AREA WITH
ONLY TYPICAL AFTERNOON CONVECTION.


Sux. Really sux. I need something to entertain me!!! I think I'm staying too much on my computer..
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172. CaribBoy 7:27 PM GMT on September 21, 2011    
See you later. gonna sleep..
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173. hcubed 7:28 PM GMT on September 21, 2011    
Quoting DFWjc:


Agreed, I said two blogs ago that activity in the Western portion of the Caribbean would produce a storm that would curve over Cuba and head towards Southern Florida or the Bahamas...(the time now would be 8-10 days counting down from what i predicted a week ago).


Think it will be Ophelia, or a storm to be named later?
Member Since: May 18, 2007 Posts: 286 Comments: 1639
174. mossyhead 7:28 PM GMT on September 21, 2011    
although Ophelia appears to be less organized this morning...with
the low-level center partially exposed to the southwest of the deep
convection...a 1200 UTC ascat pass and an observation from ship
pbsy indicates that the intensity has increased to near 50 kt.
Since the satellite presentation is currently not suggestive of
strengthening...it is certainly possible that the cyclone was
stronger than previously estimated. Latest analyses from UW-CIMSS
show that the storm is experiencing about 20 kt of
south-southwesterly shear. Global model guidance indicates that the
shear will not relent over the next several days...and the official
intensity forecast calls for slow weakening over the forecast
period. This is in close agreement with the lgem and SHIPS
predictions. It should be noted that the COAMPS-tc model...which
is part of the hfip suite and has been a good performer so far this
year...shows a faster demise of the tropical cyclone than most of
the other guidance
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177. GTcooliebai 7:31 PM GMT on September 21, 2011    
Quoting basti11:



what is your problem ...are you mad because i have been spot on all year...i said this about september 21st for the pass 2 weeks...GOM AND TAMPA NORTH ARE OUT OF THE HURRICANE SEASON..i already posted the odds for october and south fla and the keys are 9/2...
You're cloudburst2011 right, if you're I think I remember you saying this. Anyways Tampa hasn't been directly hit by a Hurricane since 1921, however Southwest FL. seems to be in the bulls eye almost every year, particularly Fort Myers southward into the Keys. Take Fay, Wilma and Donna just to name a few.
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179. Hangten 7:33 PM GMT on September 21, 2011    
These guys are playing you all like a violin and you are buying into it by answering them. No wonder all the good bloggers have bailed from this blog. It really is sad. This was a great place. Go ahead, keep answering them! By answering them and giving them attention you are doing more harm than good. This is really pathetic to watch. I'm gone!!
Member Since: August 24, 2011 Posts: 0 Comments: 61
180. DFWjc 7:34 PM GMT on September 21, 2011    
Quoting hcubed:


Think it will be Ophelia, or a storm to be named later?


Originally I had it a Low, but as everyone knows, things change, and it "O" is at that place at the time I predicted...it would be nice, LOL... no really if i'm wrong, i'm wrong...
Member Since: July 19, 2011 Posts: 1 Comments: 967
182. MTWX 7:38 PM GMT on September 21, 2011    
Anyone notice the spinner to the North of the DR and East of the Bahamas?? Is that just an upper low with a lot of convection?? Asking cause I have no idea... Link
Member Since: July 20, 2009 Posts: 22 Comments: 1215
183. TropicalAnalystwx13 7:38 PM GMT on September 21, 2011    
Quoting basti11:



do you know how to read ...well get a dictionary and you can look it up for you can have it fresh in your mind what a TUTT is...


Better yet, why don't you tell us what a TUTT is?

We're waiting. :)
Member Since: July 6, 2010 Posts: 89 Comments: 25301
184. Ameister12 7:40 PM GMT on September 21, 2011    
Quoting WeatherWx:


What is a TUTT basti11???

Tropical Upper Tropospheric Trough. It is an upper low in the tropics. These things are accompanied by shear and will inhibit tropical cyclone formation or intensification if the TC is too close.
Member Since: August 9, 2009 Posts: 9 Comments: 3517
185. TropicalAnalystwx13 7:40 PM GMT on September 21, 2011    
Nicely organized, weak tropical storm:



Not so nicely organized, mid-grade tropical storm:


Member Since: July 6, 2010 Posts: 89 Comments: 25301
186. FLWeatherFreak91 7:41 PM GMT on September 21, 2011    
Quoting serialteg:
That's awesome. I haven't been following the blog the past few days... is that 99l? If so, what a champ!
Member Since: December 1, 2006 Posts: 2 Comments: 3461
187. yacoub 7:41 PM GMT on September 21, 2011    
Looks like all the alarm over the arctic ice hasn't mattered for sea levels? http://campaign2012.washingtonexaminer.com/blogs/b eltway-confidential/promise-kept-sea-levels-fall-u nder-obama
Member Since: August 28, 2007 Posts: 0 Comments: 47
188. MTWX 7:42 PM GMT on September 21, 2011    
Quoting TropicalAnalystwx13:


Better yet, why don't you tell us what a TUTT is?

We're waiting. :)

Poking trolls with sticks... sounds like fun! I may have to go un-ignore him and join!
Member Since: July 20, 2009 Posts: 22 Comments: 1215
189. robintampabay 7:45 PM GMT on September 21, 2011    
Quoting basti11:



do you know how to read ...well get a dictionary and you can look it up for you can have it fresh in your mind what a TUTT is...



Listen borther nobody gives two spits what you say. I can't count how many times you have been banned from WU. Unfortunatly you mange to find a way to wiggle your sorry arse back in here to stand on your soap box and profess your vast knowledge of tropical systems. I don't know if we could set up some type of vote to permenantly get rid of you, probably not. I just call them like I see them!
Member Since: September 16, 2010 Posts: 0 Comments: 74
190. Ameister12 7:45 PM GMT on September 21, 2011    
Member Since: August 9, 2009 Posts: 9 Comments: 3517
192. CybrTeddy 7:46 PM GMT on September 21, 2011    
Really people?? Still quoting basti11? He's here to stir up trouble, ie he's cloudbust2011.. ignore him.
Member Since: July 8, 2005 Posts: 253 Comments: 20245
193. WxLogic 7:46 PM GMT on September 21, 2011    
Quoting MTWX:
Anyone notice the spinner to the North of the DR and East of the Bahamas?? Is that just an upper low with a lot of convection?? Asking cause I have no idea... Link


It is an ULL that is expected to get over Bahamas and close to E FL where it could potentially gain a low level reflection which could become a subtropical or extra-tropical low E of FL and heading NE.
Member Since: August 14, 2008 Posts: 4 Comments: 4667
194. Jedkins01 7:47 PM GMT on September 21, 2011    
Quoting CaribBoy:
I like bad weather so much! When it's always sunny, it's boring and i feel depressive! lol


Dude you and me both, sunny and dry weather sucks. I wish we had a 80 to 90% chance of storms 360 days year round! I live in Central Florida, we can get a lot of rain here for an extended period but then we get very dry periods too. Ive had 63.37 inches so far this year. Thankfully we are not below normal like last year, in fact we are actually above normal by 11 inches for the entire year lol. Last year we had a very lame 39 the entire year.

Maybe I should move the the equator, where they have a 12 month wet season! Every month is wet and active, some are wetter than others of course.
Member Since: August 21, 2008 Posts: 0 Comments: 5333
195. Twinkster 7:47 PM GMT on September 21, 2011    
According to the last couple of runs of the ECMWF the northwest caribbean looks to start ramping up on october 1st
Member Since: June 7, 2007 Posts: 4 Comments: 932
196. RedStickCasterette 7:48 PM GMT on September 21, 2011    
Quoting Hangten:
These guys are playing you all like a violin and you are buying into it by answering them. No wonder all the good bloggers have bailed from this blog. It really is sad. This was a great place. Go ahead, keep answering them! By answering them and giving them attention you are doing more harm than good. This is really pathetic to watch. I'm gone!!


+100

Why in the world is it an issue for someone to have an opinion???

No wonder everyone decent is bailing.
Member Since: July 20, 2010 Posts: 0 Comments: 257
197. MTWX 7:48 PM GMT on September 21, 2011    
Quoting yacoub:
Looks like all the alarm over the arctic ice hasn't mattered for sea levels? http://campaign2012.washingtonexaminer.com/blogs/b eltway-confidential/promise-kept-sea-levels-fall-u nder-obama

Arctic ice melt won't ever cause sea level rise, Antarctic ice will...
Member Since: July 20, 2009 Posts: 22 Comments: 1215
200. MTWX 7:51 PM GMT on September 21, 2011    
Quoting WxLogic:


It is an ULL that is expected to get over Bahamas and close to E FL where it could potentially gain a low level reflection which could become a subtropical or extra-tropical low E of FL and heading NE.

Thank you for responding. I thought it was an upper low, just wanted to make sure.
Member Since: July 20, 2009 Posts: 22 Comments: 1215
201. hcubed 7:51 PM GMT on September 21, 2011    
Quoting WeatherWx:


blockhead, TUTT isnt in a dictionary.lol you claim to be an expert!


Actually, if you google TUTT, you do get some hits:

TUTT The Universe Think Tank (TUTT Group)
TUTT Technologies United Trade Trust (Des Moines, Iowa USA)
TUTT The United Trade Trust (TUTT Group)
TUTT The Universe Trade Trust (TUTT Group)

He just has to pick one...
Member Since: May 18, 2007 Posts: 286 Comments: 1639

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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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