Dr. Jeff Masters' WunderBlog

More heat; Gulf of Mexico disturbance
Posted by: Dr. Jeff Masters, 4:32 PM GMT on July 23, 2006 +0
The heat was unrelenting yesterday across the Southwest U.S., where most of California and Arizona set new high temperature records. The 99 degrees in downtown Los Angeles beat the old record of 96 set in 1960, and the suburb of Woodland Hills hit a record 119. All the cities in California's Central Valley set records: 109 degrees in Sacramento, 111 in Redding, and 112 in Red Bluff, Stockton and Modesto. San Francisco's 87 degrees easily beat the record of 81 for the date, set back in 1917.

In Phoenix, this morning's low temperature was 97 degrees, which broke the all-time record for highest low temperature ever recorded in that city (96, set on Jul 15, 2003). Tucson's low of 89 Saturday morning was its highest low temperature in recorded history, as well. The temperature topped out at record 116 in Phoenix yesterday, and 121 in nearby Gila Bend.

Tropical update
An area of disturbed weather continues over the southwestern Gulf of Mexico. Wind shear is over 20 knots in this region, which is too high to allow development today. Both the GFS and NOGAPS models are forecasting this shear to be 15 knots or higher over the next few days, and usually one needs wind shear to fall to the 10-15 knot range for development. However, the NHC is playing it cautiously and has put a Hunter airplane on call for Monday, if needed. I'll be surprised if this flight happens.


Figure 1. Preliminary model forecast tracks for the area of disturbed weather in the Southwest Gulf of Mexico.

Enjoy another quiet weekend in the tropics, everyone!
Jeff Masters
Categories: Heat
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51. bappit 7:20 PM GMT on July 23, 2006    
Brownsville forecast discussion describes shear as "negligible".
Member Since: May 18, 2006 Posts: 3 Comments: 4354
52. Skyepony (Mod) 7:34 PM GMT on July 23, 2006    
That was a good article bug, I think FL faught off the drilling for now, but I heard oil tankers are starting to frequent Cape Canaveral. LA is going to allow additional drilling in exchange for marshland rebuilding money (talk about dealing with the devil). What was the point of that speech about getting this country off oil, seems all this legislation just past total contradicts the promises.

BEIJING (AP) — China's death toll from Tropical Storm Bilis rose to 530 on Saturday, more than a week after the storm hit, as officials in southern Guangdong province and the Guangxi region reported an additional 48 deaths, state media said.
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53. Skyepony (Mod) 7:39 PM GMT on July 23, 2006    
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54. Skyepony (Mod) 7:47 PM GMT on July 23, 2006    
Oklahoma City was so hot Friday that a portion of Interstate 44 buckled, forcing the temporary closure of two lanes. From an article on the St Loius storms. There's been more than several deaths from this heatwave.
Member Since: August 10, 2005 Posts: 144 Comments: 29240
55. SLU 7:51 PM GMT on July 23, 2006    
href="http://www.ssd.noaa.gov/goes/east/catl/loop-vis.html" target="_blank">Link

The atlantic wave/low seems to be aquiring a more substantial circulation this afternoon. If thunderstorm development ensues then satellite classifications may follow suit soon after. (invest 99L that is)
Member Since: July 13, 2006 Posts: 11 Comments: 2846
56. SLU 7:52 PM GMT on July 23, 2006    
oops...
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57. nola70119 7:57 PM GMT on July 23, 2006    
http://www.osdpd.noaa.gov/PSB/EPS/SST/data/anomnight.7.22.2006.gif

According to this NOAA chart the temperatures are above average in most areas near the US......no?
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59. lightning10 8:11 PM GMT on July 23, 2006    
If you click my blog you can see a video of the thunderstorm that came through my area. That same storm beleave brought some rain to the downtown LA area.
Member Since: November 24, 2005 Posts: 41 Comments: 629
60. StormJunkie 8:17 PM GMT on July 23, 2006    
Afternoon all. I see we are still debating the Coastal SSTs :)

I would like for someone to explain to me why the AVHRR maps show the warmer waters along the E coast and the N Gulf, and yet there is still some dispute about it. Not just here, but when you compare them with other maps the data just does not add up, as well as some mets talking about the warmer coastal waters. One thing I will say for the AVHRR maps is that they show much more detail then the colored in SST maps.

StormJunkie.com-Models, imagery, marine data, wind data, preparedness info, and much more.
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61. franck 8:18 PM GMT on July 23, 2006    
Do these upper level winds play along with high pressure and heat as a general rule. If so, noticing these areas of extreme convection popping up in a few hours all over the place, it may be interesting later in the season when these shear winds should subside.
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62. Cavin Rawlins 8:19 PM GMT on July 23, 2006    
98L Update
20 knots
1011mbar pressure
very disorganized
Located 20.0N-96.0W
VISIBLE IMAGE
Member Since: July 24, 2005 Posts: 407 Comments: 19076
63. WSI 8:33 PM GMT on July 23, 2006    
"According to this NOAA chart the temperatures are above average in most areas near the US......no?"

Yeah, but we were talking about 2005 and 2006.

In any case, here are the maps I am looking at.

2006

2005

These have the exact same date. On the previous comparison I was trying to match SJ's dating. Yeah, looks warmer overall in the Gulf, but the east coast... there is no question. Cooler according to those maps. In fact, much of the tropical Atlantic is cooler than 2005.

Everyone just choose the one that makes them happy. :)
64. SAINTHURRIFAN 8:36 PM GMT on July 23, 2006    
456 actually i think the low is further n and e the pressures are lowering in these areas i still think if? this
develops it will probably go further n and e
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65. Cavin Rawlins 8:41 PM GMT on July 23, 2006    
yeah, saint i see some convection building to the north
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66. WSI 8:46 PM GMT on July 23, 2006    
"I would like for someone to explain to me..."

What mets SJ? And this isn't the first time I have seen the AVHRR site in a dispute such as this on here. :)

When I pull a map saying the exactly opposite of what you say... pretty obvious why I dispute it. :) I might grant you the GOM temps, but not the east coast.

In any case, I am sure everyone will choose the site they want. I like the AOML site, and will continue to pull my data from it unless I find a reason not to.
67. Tazmanian 8:47 PM GMT on July 23, 2006    
Posted By: Weather456 at 1:41 PM PDT on July 23, 2006.
yeah, saint i see some convection building to the north


??????? do you mean 98L 456?
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68. StormJunkie 8:48 PM GMT on July 23, 2006    
Afternoon WSI, good to see you.

I am not disputing that SST maps differ, just trying to understand why and what is causing the discrepancies. Seems to be a similar situation with shear, as there are often times differing views of shear on various shear maps. I think that a lot of the wind shear map discrepancies can be attributed to different levels and types of shear, which I yet to have a clear understanding of.
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70. chessrascal 8:50 PM GMT on July 23, 2006    
anybody have sattelite images of Beryl with radar if possible.
72. Cavin Rawlins 8:52 PM GMT on July 23, 2006    
taz, yeah.
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73. Tazmanian 8:54 PM GMT on July 23, 2006    
Weather456 coool so 98L is looking more happy right now
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74. Cavin Rawlins 8:55 PM GMT on July 23, 2006    
Emilia is almost a hurricane {70mph}, while Daniel continues to weaken {120}.
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75. Cavin Rawlins 9:00 PM GMT on July 23, 2006    
No Taz, even though convection is building to the north, it is nowhere near the center and it is very disorganise. The only chance now if it moves north it will encounter very favourable Wind shear and SST.

Wind shear again has increase across the caribbean.

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76. franck 9:01 PM GMT on July 23, 2006    
I would think there are better references than the AOML, which is part of the Department of Commerce.
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77. WSI 9:01 PM GMT on July 23, 2006    
"just trying to understand why and what is causing the discrepancies"

I agree its interesting. I think its a matter of how they are processed. There are only so many sats up there, so the data has limited sources. :)

In any case, I have seen the AOML site used a fair amount (Steve Gregory used it some, and I think I have seen Dr. Master's post it once or twice if I am not mistaken). Other bloggers have used it too. Guess that is the one I am familiar with. The anomalies that I posted seem to reinforce the fact that 2005 was indeed warmer overall. If you look there, it would appear that 2005 had the "warmer" anomalies.

I do like the detail of the site you posted.
78. Cavin Rawlins 9:02 PM GMT on July 23, 2006    
the NHC is still holding onto it:

000
ABNT20 KNHC 232056
TWOAT
TROPICAL WEATHER OUTLOOK
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
530 PM EDT SUN JUL 23 2006

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

DISORGANIZED SHOWER ACTIVITY CONTINUES IN THE SOUTHWESTERN GULF OF
MEXICO. UPPER-LEVEL WINDS ARE EXPECTED TO BECOME A LITTLE MORE
FAVORABLE FOR DEVELOPMENT DURING THE NEXT DAY OR TWO AS THE AREA OF
DISTURBED WEATHER MOVES SLOWLY TO THE NORTH OR NORTHWEST. AN AIR
FORCE RESERVE RECONNAISSANCE AIRCRAFT IS SCHEDULED TO INVESTIGATE
THE SYSTEM TOMORROW...IF NECESSARY.

ELSEWHERE...TROPICAL STORM FORMATION IS NOT EXPECTED THROUGH MONDAY.

$$

FORECASTER FRANKLIN
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79. Tazmanian 9:04 PM GMT on July 23, 2006    
: Weather456 wow how mean dos that make for hurricnae evere name storm has be come a hurricane so far
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80. Virginiaweather 9:05 PM GMT on July 23, 2006    
NAM seems to give an area in the Florida Straits a chance to develop off north carolina. Link
doesn't look impressive now, but who knows?
81. Cavin Rawlins 9:08 PM GMT on July 23, 2006    
Posted By: Tazmanian at 5:04 PM AST on July 23, 2006.
: Weather456 wow how mean dos that make for hurricnae evere name storm has be come a hurricane so far


I dont quite understand.
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82. L5 9:09 PM GMT on July 23, 2006    
An interesting question:

Everyone is so very concerned about the surface temperatures - has anyone noticed the temperature gradients aloft?

This is potentially more significant. Further, models on radiation cooling, etc. may be even more strongly leveraged? Does this trigger an ice-age like event?

Earth does remain in some grander equilibrium due to distance from the sun, etc. ...

Anyone have data on what is happening to the tropospheric gradients?
83. quakeman55 9:11 PM GMT on July 23, 2006    
So does the BOC system have a chance at becoming TD 3?
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84. quakeman55 9:12 PM GMT on July 23, 2006    
I can't get the latest Naso update to play...that really sucks :( Guess I'll just have to wait for another one...
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85. GetReal 9:12 PM GMT on July 23, 2006    
In my opinion if 98L does not get itself together over the next 24 hours, and organize a LLC further away from shore, the actual area that may be of more concern is the central or western GOM. There will be a weakening frontal trof drapped across the northern GOM, very favorable upper level conditions, the very warm SST's, and pressures are relatively low across the northern GOM.
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86. Cavin Rawlins 9:13 PM GMT on July 23, 2006    
Posted By: quakeman55 at 5:11 PM AST on July 23, 2006.
So does the BOC system have a chance at becoming TD 3?


one chance: move north into low wind shear.
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87. Tazmanian 9:25 PM GMT on July 23, 2006    
456

when Tropical Storm Emilia be comes hurricane Emilia how mean would that be for july and is that odd to have this mean i think evere strom we get will be come a hurricne this watch
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88. Inyo 9:34 PM GMT on July 23, 2006    
Here in California we have been having odd thunderstorms and extreme heat. Thunderstorms aren't rare in the mountains this time of year but the intensity and scope of the ones we had up there this weekend was amazing. Next week may cool slightly but we may actually end up dealing with the remnants of Emilia.
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90. Cavin Rawlins 9:55 PM GMT on July 23, 2006    
Taz, i see what you mean, EPAC is always the opposite, thats why we only had one storm in July.
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91. ProgressivePulse 9:57 PM GMT on July 23, 2006    
Bullish CMC seems to like the wave in the central atl.
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92. Tazmanian 9:57 PM GMT on July 23, 2006    
Weather456 but why are they seeing so mean hurricne overe there and we have not yet seen one
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94. Cavin Rawlins 10:04 PM GMT on July 23, 2006    
Taz, upper level winds were very favourable through out July in the EPAC, and the Atlantic, opposite, very unfavourable.

Thats why the EPAC had more hurricanes.

But something I realize in the past weak. Wind shear has increase in the EPAC area, and decrease in the Atlantic.
Member Since: July 24, 2005 Posts: 407 Comments: 19076
95. Tazmanian 10:06 PM GMT on July 23, 2006    
so would this be that last hurricane for them so that way we culd start talking about the next name storm for us what is the forcast for us oh from now to the 1sr week augst
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96. Tazmanian 10:08 PM GMT on July 23, 2006    
ouch!!!!! STOCKTON ca is now 114 right now or this about 115 eeeeeek give me some snow man
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97. ProgressivePulse 10:13 PM GMT on July 23, 2006    
EPAC storms are Africa Born also Taz. Once some of the waves start forming in the Atlantic Basin you will notice the EPAC die down. All the active EPAC tells you is that conditions are still not favorable in the Atlantic.
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98. ProgressivePulse 10:15 PM GMT on July 23, 2006    
Emilia's track, although common. Might tell you something about the Atlantic. I have done no research yet but I will.
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100. Cavin Rawlins 10:18 PM GMT on July 23, 2006    
seems that 98L, is interacting with some convection in the gulf. Well I'm off until later tonight or Monday.
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101. ProgressivePulse 10:19 PM GMT on July 23, 2006    
High Pressure off the Northwest coast also has a big impact on the seasons, which I will also be doing some research on.
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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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