Jet stream moved northwards 270 miles in 22 years; climate change to blame?

By: Dr. Jeff Masters , 4:11 PM GMT on June 05, 2008

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Climate change is forcing the jet stream higher and closer to the pole in both the Northern and Southern Hemisphere, according research published this April in the journal Geophysical Research Letters. In their paper, "Historical trends in the jet streams", researchers Cristina Archer and Ken Caldeira of Stanford's Carnegie Institution of Washington analyzed data from 1979-2001, and found that the Northern Hemisphere jet stream moved northward at approximately 125 miles per decade (270 miles during the 22-year period of the study). The jet moved higher by 5-23 meters during this period, and the wind speeds decreased by about 1 mph. Archer and Caldeira's study confirms other research showing a poleward movement of the jet stream in recent decades (Fu et al., 2006; Hu and Fu, 2007). All of these changes are consistent with the behavior of the jet stream predicted by global warming theory. For example, Lorenz and DeWeaver (2007) found poleward shifts of the jet stream by 2100 in the forecasts of 15 climate models used to formulate the "official" word on climate, the 2007 Intergovernmental Panel for Climate Change (IPCC) report. However, the authors were careful not to say how much of this shift in the jet stream was due to natural causes versus human-caused climate change. It is unknown if the jet stream has natural decades-long changes in its path that could account for the observed poleward shift.


Figure 1. The jet stream is located where the strongest winds at the top of the troposphere are found (35,000-45,000 feet high, 200-300 mb in pressure).

Archer and Caldeira note that "These changes in jet stream latitude, altitude, and strength have likely affected, and perhaps will continue to affect, the formation and evolution of storms in the mid-latitudes and of hurricanes in the sub-tropical regions." They don't specify what these changes might be. There is very little research that has been done suggesting how changes in the jet stream might affect hurricane formation and strength. One effect we may begin to see in coming decades is a reduction and/or delay in the number of hurricanes that recurve northward out to sea. Recurvature occurs when a hurricane begins to "feel" the westerly winds of the jet stream. As the jet stream continues to move northward and weaken as the globe warms, we can expect that hurricanes moving though the Caribbean will be less likely to recurve, resulting in more hurricane strikes in Mexico and Central America. Unfortunately, the quality of the Atlantic hurricane database for non-U.S. landfalls is not very good, and it will be several decades before we will be able to tell if the number of hurricane landfalls in Mexico and Central America is increasing due to a poleward shift in the jet stream.

References
Fu, Q., C. M. Johanson, J. M. Wallace, and T. Reichler (2006), Enhanced mid-latitude tropospheric warming in satellite measurements, Science, 312, 1179, doi:10.1126/science.1125566.

Hu, Y., and Q. Fu (2007), Observed poleward expansion of the Hadley circulation since 1979, Atmos. Chem. Phys. Disc., 7, 9367.9384.

Lorenz, D. J., and E. T. DeWeaver (2007), Tropopause height and zonal wind response to global warming in the IPCC scenario integrations, J. Geophys. Res., 112, D10119, doi:10.1029/2006JD008087.

Jeff Masters

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214. Levi32
12:42 PM AKDT on June 05, 2008
Sorry for the double-post......stupid computer.

Yeah OSU I know, but it's still early in the day. We'll see how it goes.
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213. Levi32
12:40 PM AKDT on June 05, 2008
Here's one of the first nasty cells of the day. A tornado moving northeast across i70 in western Kansas right now.



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212. OSUWXGUY
8:35 PM GMT on June 05, 2008
Another thing to look at is the radar.

These storms out there so far are not your classic supercells that produce the strong, damaging tornadoes.

Your mid-level flow needs to push your storms off the boundary that initiates them...which is usually a North-South oriented dry line.
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211. Levi32
12:40 PM AKDT on June 05, 2008
Here's one of the first nasty cells of the day. A tornado moving northeast across i70 right now.



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210. NEwxguy
8:32 PM GMT on June 05, 2008
A Tornado Warning remains in effect until 400 PM CDT for
northwestern Trego County...

At 332 PM CDT... National Weather Service Doppler radar continued to
show a possible tornado 3 miles south of Collyer... moving
northeast at 55 mph.

* Locations impacted include...
Collyer...
Voda...
WaKeeney...
rural residences of northwestern Trego County.

This storm has a history of producing tornadoes.

This storm is considered a supercell storm. Destructive hail the size
of golfballs or larger and very dangerous straight line
winds will also be likely near the tornadic portion of this storm
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209. Randyman
3:35 PM CDT on June 05, 2008
The forecast reasoning hasn't changed much since this morning...



DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0317 PM CDT THU JUN 05 2008

VALID 052000Z - 061200Z

...THERE IS A HIGH RISK OF SVR TSTMS ACROSS EASTERN KS/EASTERN
NEB/SOUTHEAST SD/WESTERN IA/NORTHWEST MO...

...THERE IS A MDT RISK OF SVR TSTMS FROM NORTHWEST OK INTO SOUTHERN
MN/FAR WESTERN WI/MUCH OF IA...

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE SOUTHERN PLAINS INTO
THE UPPER MIDWEST/GREAT LAKES AND PORTIONS OF THE NORTHEAST...

...PLAINS INTO THE UPPER MIDWEST AND MIDDLE/UPPER MISSISSIPPI
VALLEY...
A SEVERE WEATHER OUTBREAK CONTINUES TO QUICKLY EVOLVE ACROSS THE
CENTRAL/SOUTHERN PLAINS INTO THE UPPER MIDWEST THIS AFTERNOON. GIVEN
UNSEASONABLY STRONG KINEMATICS/VERTICAL SHEAR ATOP A VERY
MOIST/UNSTABLE WARM SECTOR...CONFIDENCE REMAINS HIGH IN WIDESPREAD
DAMAGING WINDS AND THE POSSIBILITY OF STRONG TORNADOES /AS WELL AS
LARGE HAIL/ THROUGH TONIGHT...ESPECIALLY ACROSS THE HIGH/MODERATE
RISK AREAS OF THE CENTRAL/SOUTHERN PLAINS AND MIDWEST.

AT MID AFTERNOON...A 989 MB SURFACE LOW WAS LOCATED ACROSS SOUTHEAST
NEB/NORTHWEST KS...WITH A COLD FRONT AND DRYLINE EXTENDING
SOUTH-SOUTHWESTWARD FROM THE SURFACE LOW INTO THE SOUTHERN HIGH
PLAINS. EAST FROM THE SURFACE LOW...A ROUGHLY WEST-EAST ORIENTED
WARM FRONT CONTINUES TO SLOWLY RETREAT NORTHWARD FROM NEB/NORTHERN
IA TO ALONG THE IL/WI BORDER. AS A POTENT MID LEVEL SHORTWAVE
TROUGH/JET STREAK CONTINUES TO SPREAD EASTWARD ACROSS THE
CENTRAL/SOUTHERN HIGH PLAINS THROUGH THIS EVENING...A BROAD WARM
SECTOR REMAINS CHARACTERIZED BY UPPER 60S/LOWER 70S F DEWPOINTS
ACROSS CENTRAL/SOUTHERN PLAINS AND UPPER MIDWEST.

A BROKEN BAND OF SUPERCELLS CONTINUE TO QUICKLY DEVELOP AT MID
AFTERNOON ACROSS THE CENTRAL PORTIONS OF NEB/KS INTO NORTHWEST OK.
INTENSITY OF THE DEEP LAYER WIND FIELD /45-80 KT 0-6 KM/ THROUGHOUT
THE PLAINS ENSURES THAT ANY SUSTAINED UPDRAFTS WILL EASILY ROTATE.
THESE BROKEN SUPERCELLS WILL BE CAPABLE OF LARGE HAIL/TORNADOES
THROUGH THE AFTERNOON...WITH THE RISK OF DAMAGING WINDS LIKELY
INCREASING THIS EVENING/TONIGHT OWING TO INCREASINGLY STRONG LINEAR
FORCING AND THE LIKELY DEVELOPMENT OF BOWING SEGMENTS...INCLUDING
THE POSSIBILITY OF AN EVENTUAL DERECHO WITH WIDESPREAD WIND DAMAGE
ESPECIALLY ACROSS THE HIGH RISK/ADJACENT MODERATE RISK AREAS OF
KS/NEB INTO IA/NORTHWEST MO/SOUTHERN MN. WHILE TORNADOES WILL BE
POSSIBLE ACROSS A LARGE PART OF THE CENTRAL/SOUTHERN PLAINS AND
MIDWEST...THE RELATIVELY GREATEST RISK FOR STRONG/POTENTIALLY LONG
TRACK TORNADOES WOULD INITIALLY APPEAR TO BE ACROSS CENTRAL/EASTERN
NEB AND CENTRAL/EASTERN KS INTO WESTERN IA...IN VICINITY OF BACKED
LOW LEVEL FLOW/STRONG LOW LEVEL HODOGRAPHS EAST OF THE SURFACE LOW
IN AN OTHERWISE VERY MOIST/UNSTABLE AIRMASS.

FARTHER SOUTH...GIVEN WARM TEMPERATURES ALOFT/GLANCING LARGE SCALE
FORCING FOR ASCENT...THE SEVERE WEATHER RISK IS EXPECTED TO BE LESS
NUMEROUS IN NATURE ALONG THE DRYLINE FROM SOUTHWEST OK INTO
NORTHWEST/WEST CENTRAL TX. OTHER SEVERE STORMS WILL CONTINUE INTO
EARLY EVENING WITHIN A POST-DRYLINE/HIGHLY SHEARED REGIME ACROSS THE
CENTRAL HIGH PLAINS INCLUDING WESTERN KS/WESTERN NEB.

REFERENCE LATEST SPC WATCHES/MESOSCALE DISCUSSIONS FOR LATEST
MESOSCALE DETAILS REGARDING THE EVOLVING SEVERE WEATHER OUTBREAK.

..GUYER.. 06/05/2008


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208. Levi32
12:33 PM AKDT on June 05, 2008
206. OSUWXGUY 12:32 PM AKDT on June 05, 2008 Hide this comment.
I think the SPC went "gaga" over the speed shear like you're mentioning...and put out the high risk. We DO have a strong early season like low and wind fields with late season moisture and associated very high instability.

I mean...I could end up being way wrong...and I still do think that up near the warm front in northern Nebraska and Northern Iowa there may be some strong tornadoes...as the low level turning of the winds here are maximized.


Oh exactly.......the warm front is going to be a main area overnight tonight. The cold front in Kansas is going to spawn severe storms that break the cap the way they are right now, and for a time they will explode with tornadic potential. Later on I think they'll organize into squall lines minimizing the tornado threat, but further north like you said near the warm front tornadoes will continue through the night and it could get pretty nasty.
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207. Levi32
12:30 PM AKDT on June 05, 2008
Well I guess we'll see how it goes. I don't think this will be "epic".....but it could be one of the worst we've ever seen past June 1st.

Here come the first tornadoes of the day in western Kansas.
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206. OSUWXGUY
8:27 PM GMT on June 05, 2008
I think the SPC went "gaga" over the speed shear like you're mentioning...and put out the high risk. We DO have a strong early season like low and wind fields with late season moisture and associated very high instability.

I mean...I could end up being way wrong...and I still do think that up near the warm front in northern Nebraska and Northern Iowa there may be some strong tornadoes...as the low level turning of the winds here are maximized.


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205. boiredfish
8:28 PM GMT on June 05, 2008
pearlandaggie,

are you going to be at Reckling for baseball this weekend? What's the weekend forecast?
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204. pottery
4:26 PM AST on June 05, 2008
Good afternoon.
So, a new wave off Africa, with all kinds of potential, and peculiar features too.

In the meantime the one at 45 w or so, seems to have been attacked with a mighty squeegee. !
Member Since: October 24, 2005 Posts: 0 Comments: 24650
203. Randyman
3:28 PM CDT on June 05, 2008
Levi-

The flow is really too unidirectional for a truly epic tornado outbreak. Speed shear (0-6km) is a good measure to look at for other types of severe storms like squall lines and large hail, but tornadoes need that low level turning of the winds. Research has shown 0-1km storm relative helicity and the lifted condensation level (LCL) are the two singlem most important discriminants for tornado activity versus other severe weather.


The SPC still feels the possibility of some strong tornadoes for Nebraska this afternoon and this evening...I can't comment on the 'epic tornado outbreak' argument...



MESOSCALE DISCUSSION 1232
NWS STORM PREDICTION CENTER NORMAN OK
0309 PM CDT THU JUN 05 2008

AREAS AFFECTED...CNTRL/ERN NEB

CONCERNING...TORNADO WATCH 461...

VALID 052009Z - 052215Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 461 CONTINUES.

IT APPEARS THAT THE 80-90 KT SOUTH SOUTHWESTERLY 500 MB JET CORE HAS
EMERGED FROM THE SOUTHERN ROCKIES. AND...THIS FEATURE WILL CONTINUE
TO NOSE ACROSS THE CENTRAL PLAINS THROUGH THE REMAINDER OF THE
AFTERNOON. FORCING/DESTABILIZATION IN ITS EXIT REGION HAS
CONTRIBUTED TO INCREASING CONVECTIVE DEVELOPMENT ALONG INITIAL COOL
SURGE INTO CENTRAL NEBRASKA/KANSAS...WITH MORE SCATTERED CELLS
FARTHER WEST...AHEAD OF THE NEXT DEEPER COLD SURGE.

TORNADIC POTENTIAL WITH DISCRETE CELL SOUTH/EAST OF NORTH PLATTE
COULD INCREASE AS IT ENCOUNTERS MORE FAVORABLE ENVIRONMENT IN THE
WARM SECTOR OF THE DEEP SURFACE CYCLONE NORTHEAST OF NORTH PLATTE
...THROUGH THE BROKEN BOW AREA...BETWEEN NOW AND 21-22Z.
OTHERWISE...TORNADO POTENTIAL SHOULD INCREASE IN THE PEAK AFTERNOON
HEATING...WITHIN PRE-FRONTAL STORMS IN ARCING BAND ON LEADING EDGE
OF STRONGER MID-LEVEL COOLING...NEAR GRAND ISLAND NORTHWARD THROUGH
AREAS NEAR/WEST OF O'NEILL. WITH SURFACE WINDS MAINTAINING A
SOUTHEASTERLY COMPONENT...LOW-LEVEL HODOGRAPHS ARE MAXIMIZED ACROSS
THIS REGION. AND...ISOLATED STRONG TORNADOES ARE POSSIBLE.

SUBSTANTIAL CAP MAY CONTINUE TO SUPPRESS DEVELOPMENT FARTHER
EAST...UNTIL STRONGER MID-LEVEL COOLING APPROACHES THE MISSOURI
RIVER LATER THIS AFTERNOON/EARLY EVENING.

..KERR.. 06/05/2008
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202. hurricane23
4:26 PM EDT on June 05, 2008
To me what maybe of real trouble later this season is the below average wind shear across parts of the tropical atlantic.If the trend continues we could be in for a good ride hopefully steering is in our favor.As noted by the NHC sst's are still rather cool but the combination of above average sst's and below normal windshear is a recipe iam not to interested in.

CLICK HERE for viewing sst's.
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201. sky1989
8:17 PM GMT on June 05, 2008
I wonder if Bertha will be as bad this year as she was in 1996. It became an early season, formed on July 5, Cape Verde Category 3 major hurricane. It eventually made landfall in North Carolina as a Category 2, causing 12 deaths.
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200. Patrap
3:23 PM CDT on June 05, 2008
A Super Outbreak is a rare event,but as the previous stated,the bag of Donuts may Spill out this Evening ,and with Long track Large Damaging Tornadoes.
Member Since: July 3, 2005 Posts: 426 Comments: 129093
199. help4u
8:23 PM GMT on June 05, 2008
Happy global warming day everyone.
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198. Levi32
12:19 PM AKDT on June 05, 2008
197. OSUWXGUY 12:18 PM AKDT on June 05, 2008 Hide this comment.
Levi-

The flow is really too unidirectional for a truly epic tornado outbreak. Speed shear (0-6km) is a good measure to look at for other types of severe storms like squall lines and large hail, but tornadoes need that low level turning of the winds. Research has shown 0-1km storm relative helicity and the lifted condensation level (LCL) are the two singlem most important discriminants for tornado activity versus other severe weather.


Very true.....but then explain why the SPC has such a huge high risk area. Severe thunderstorms are not my area of expertice.....but those upper winds will be turning back to the SW or west later on this evening, and there's 70+ dewpoints on the surface along with a very impressive inflow from the gulf. We could see 50+ tornadoes today.
Member Since: November 24, 2005 Posts: 635 Comments: 26684
197. OSUWXGUY
8:12 PM GMT on June 05, 2008
Levi-

The flow is really too unidirectional for a truly epic tornado outbreak. Speed shear (0-6km) is a good measure to look at for other types of severe storms like squall lines and large hail, but tornadoes need that low level turning of the winds. Research has shown 0-1km storm relative helicity and the lifted condensation level (LCL) are the two singlem most important discriminants for tornado activity versus other severe weather.

193. Levi32 8:10 PM GMT on June 05, 2008
Take a look at this sounding from Topeka, Kansas. Shows a nice cap that will allow the sun to heat things up early this afternoon, and when that cap breaks things are really going to explode. Also notice the strong winds at the mid-levels providing the needed shear for tornadoes. These winds were from the west on the previous sounding, and now they're nearly parallel to the surface winds, but there is still plenty of shear due to the strong wind speeds at the mid-levels.



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196. Weather456
4:16 PM AST on June 05, 2008
Good afternoon all
Member Since: July 24, 2005 Posts: 407 Comments: 19076
195. Floodman
8:14 PM GMT on June 05, 2008
Out again, guys...those of you in the path of all that happy in KS and NE, be careful...see you soon!
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194. Floodman
8:11 PM GMT on June 05, 2008
Back in for a sec...DocBen, it's going to be a long night for sure...looks like we may get here in north Texas, but nothing like what ya'll are in for. Keep your eyes open!
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193. Levi32
12:10 PM AKDT on June 05, 2008
Take a look at this sounding from Topeka, Kansas. Shows a nice cap that will allow the sun to heat things up early this afternoon, and when that cap breaks things are really going to explode. Also notice the strong winds at the mid-levels providing the needed shear for tornadoes. These winds were from the west on the previous sounding, and now they're nearly parallel to the surface winds, but there is still plenty of shear due to the strong wind speeds at the mid-levels.

Free Image Hosting at www.ImageShack.us

^Click to enlarge^
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192. chessrascal
3:58 PM EDT on June 05, 2008
130. jphurricane2006 2:55 PM EDT on June 05, 2008
ok you want a theory

I say the gas prices are so out of control becuase it would lead to less people driving and less pollution from cars, that would help the "global warming crisis"

how about that? lol



Gas Prices Are High Because Of Speculation.
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191. 69Viking
2:54 PM CDT on June 05, 2008
188. Drakoen

I'll be providing a live update of the water temp at Destin Pass either Monday or Tuesday! Just depends when I can get back to a computer after the weekend!
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190. JLPR
3:57 PM AST on Junio 05, 2008
wow drak that was quick =O
Its getting hot! =( Thats not good
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189. NEwxguy
7:54 PM GMT on June 05, 2008
Those charts
kind of give you the feeling the tropics are priming themselves
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188. Drakoen
7:49 PM GMT on June 05, 2008
We heating up!

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187. HIEXPRESS
3:40 PM EDT on June 05, 2008
JM:"The jet moved higher by 5-23 meters during this period, and the wind speeds decreased by about 1 mph."

As measured with this:
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184. DocBen
7:40 PM GMT on June 05, 2008
Hey Flood - we already have one here in Kansas. I think it's going to be a long night.
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183. help4u
7:39 PM GMT on June 05, 2008
LATER FRIENDS.
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182. Floodman
7:37 PM GMT on June 05, 2008
Always, NEwx, always
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181. NEwxguy
7:34 PM GMT on June 05, 2008
See ya Flood,stay safe.
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180. NEwxguy
7:34 PM GMT on June 05, 2008
viking, the prediction is mid 90's by Sunday.
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179. Floodman
7:32 PM GMT on June 05, 2008
Okay, folks, I'm out! Talk to you all soon (if you haven't put me on ignore, LOL). NEwx, the oit will be fired up, brisket will be ready for lunch tomorrow!
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177. NEwxguy
7:31 PM GMT on June 05, 2008
173. Floodman 7:30 PM GMT on June 05, 2008
170. Randyman

My,aren't you a little ray of sunshine! Put a tornado watch into my backyard! LOL

Better get working on that Johnny Walker fast!!
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175. 69Viking
2:27 PM CDT on June 05, 2008
169. NEwxguy

You know the heats coming! We had a cool spring here in NW Florida only to wake up one day and have summer here overnight. Nothing like that first day you walk out for work in the morning and it's already in the low 80's because that was the morning low! I'm just glad I have a lawn pump (well) to keep my lawn green, no rain in sight.
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174. NEwxguy
7:30 PM GMT on June 05, 2008
172. help4u 7:30 PM GMT on June 05, 2008
Don't worry about global warming. Change is on the way.The problem will be over in 4 years.The best of the world is yet to come.

LOL,is this Michelle Obama?
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173. Floodman
7:28 PM GMT on June 05, 2008
170. Randyman

My,aren't you a little ray of sunshine! Put a tornado watch into my backyard! LOL
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171. Greyelf
2:27 PM CDT on June 05, 2008
By the way, if anyone has failed to stumble across Severe Studios Live Chase Network, here's the link: Link

I find myself losing a lot of time watching streaming video of the tornado chasers. Most of them also have GPS locations.
Member Since: June 5, 2007 Posts: 18 Comments: 838
170. Randyman
2:19 PM CDT on June 05, 2008
SPC has just issued that Tornado Watch for parts of Oklahoma and Texas...



URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 465
NWS STORM PREDICTION CENTER NORMAN OK
220 PM CDT THU JUN 5 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

SOUTHWEST OKLAHOMA
WESTERN NORTH TEXAS

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 220 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF CLINTON
OKLAHOMA TO 135 MILES SOUTH OF CHILDRESS TEXAS. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU5).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 461...WW 462...WW
463...WW 464...

DISCUSSION...THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG SURFACE
DRYLINE FROM SOUTHWEST OK INTO WESTERN NORTH TX DURING THE NEXT FEW
HOURS. SUPERCELLS CAPABLE OF LARGE HAIL AND DAMAGING WINDS ARE
EXPECTED. HIGH LCLS WILL LIMIT OVERALL TORNADO THREAT...BUT STRONG
DEEP LAYER AND LOW LEVEL VERTICAL SHEAR MAY RESULT IN A FEW SPIN UPS
WITH STRONGEST CELLS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25035.
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169. NEwxguy
7:24 PM GMT on June 05, 2008
159. 69Viking 7:18 PM GMT on June 05, 2008
147. NEwxguy

Global warming in full swing obviously! LOL!

Thats alright viking,I have my computer set on auto filter for any phrases with Global warming mentioned. Which makes for a very small blog.
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168. pearlandaggie
7:23 PM GMT on June 05, 2008
165. LOL...it's Spiced Ham! amazing what a responce Spiced Ham can generate! LOL
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167. Drakoen
7:23 PM GMT on June 05, 2008
Interesting read on the Jet Stream.
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166. HurricaneGeek
3:21 PM EDT on June 05, 2008
Hi all! I'm sure everyone knows that Hurricane Season runs from June 1st to November 30th. The scary or bad thing is is that Global Warming Season runs from January 1st to December 31st!
geek
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165. Mjolnir
7:20 PM GMT on June 05, 2008
Nothing like a little "canned spam" climate change blog while the good doctor hikes the trails of Montana, eh?

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164. 69Viking
2:21 PM CDT on June 05, 2008
162. pearlandaggie

Oops, my bad, I meant Climate Change!
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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.