Major Southeast Severe Weather Outbreak May 10 and 11th

[CrazyC83]

New watch replacing the Arkansas watch. May be PDS.

EDIT - it is PDS.

[CrazyC83]

SEL6

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 296
NWS STORM PREDICTION CENTER NORMAN OK
335 PM CDT SAT MAY 10 2008

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

SOUTHERN ARKANSAS
NORTHWEST MISSISSIPPI

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 335 PM UNTIL
1000 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 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 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 65 MILES NORTH NORTHWEST OF
TEXARKANA ARKANSAS TO 35 MILES NORTH OF GREENWOOD MISSISSIPPI.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 292. WATCH NUMBER 292 WILL NOT BE IN EFFECT AFTER
335 PM CDT. CONTINUE...WW 293...WW 294...WW 295...

DISCUSSION...POTENTIALLY VOLATILE SITUATION MAY BE UNFOLDING ACROSS
PORTIONS OF SOUTHWEST AND SOUTHERN AR...EWD TO NWRN/CNTRL MS THROUGH
THIS EVENING AS LARGE DEEP-LAYER CYCLONE CONTINUES TO INTENSIFY
ACROSS KS/MO AND ASCENT STRENGTHENS ACROSS VERY UNSTABLE AIR MASS.
WARM FRONT NOW BISECTING AR NW-SE HAS BEEN REINFORCED BY DAYLONG
STRONG TO SEVERE ELEVATED CONVECTION ACROSS THE OZARK PLATEAU. AS
STRONGER FORCING NOW EMERGES WITH THE ADVANCING UPPER
TROUGH...RESIDUAL WEAK INHIBITION SHOULD BE REMOVED AND ALLOW FOR
SURFACE-BASED STORM DEVELOPMENT. STORMS/SUPERCELLS DEVELOPING IN
UNPERTURBED AIR MASS ACROSS ERN/SERN OK WILL ENCOUNTER MOIST LOW
LEVEL ELY/SELY FLOW NEAR THE WARM FRONT/OUTFLOW BOUNDARY ACROSS AR
SHORTLY. LOW LEVEL SHEAR ALONG THIS BOUNDARY...AND ACROSS THE REST
OF THE WARM SECTOR...WILL SUPPORT LONG-LIVED UPDRAFT ROTATION. A
CORRIDOR OF GREATER POTENTIAL FOR STRONG TO INTENSE LOW LEVEL STORMS
ROTATION MAY EVOLVE THROUGH THE EVENING HOURS WITH THE THREAT OF ONE
OR TWO LONGER-LIVED STRONG TORNADOES WITHIN THE WATCH AREA.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 26030.


...CARBIN

[6SpeedTA95]

we may have a couple tornado warnings in ks within the next 30 or so mins

[HarlequinBoy]

That's an ominous watch.

[HarlequinBoy]

Where exactly is the boundary right now?

[6SpeedTA95]

Where exactly is the boundary right now?

Which one? there's several "boundaries" of some form or fashion kicking off storms right now

[HarlequinBoy]

Where exactly is the boundary right now?

Which one? there's several "boundaries" of some form or fashion kicking off storms right now

Sorry lol. I meant the synoptic boundary that should be the focus for development later across Arkansas and Mississippi.

[6SpeedTA95]

Where exactly is the boundary right now?

Which one? there's several "boundaries" of some form or fashion kicking off storms right now

Sorry lol. I meant the synoptic boundary that should be the focus for development later across Arkansas and Mississippi.

http://www.spc.noaa.gov/exper/mesoanaly ... p?sector=1

click on "basic surface" then click on "temps and dewpoints" and you can see the clear convergence where the southern/moist air is...then click on Theta E Advection and you can once again see one of these boundaries quite clearly.

Next click on "thermodynamic fields" and click on SBCAPE and then Lifted Index...both clearly show the bounder across southern and central portions of arkansas....

[HarlequinBoy]

The storm in Chatauqua County, Kansas is producing baseball size hail, and may have some modest rotation.

Thanks 6speed.

[CrazyC83]

SEL7

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 297
NWS STORM PREDICTION CENTER NORMAN OK
415 PM CDT SAT MAY 10 2008

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

CENTRAL TEXAS

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 415 PM UNTIL
900 PM CDT.

TORNADOES...HAIL TO 3 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHEAST OF DALLAS
TEXAS TO 25 MILES SOUTHEAST OF TEMPLE TEXAS. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU7).

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 293...WW 294...WW
295...WW 296...

DISCUSSION...CAP HAS WEAKENED WHERE AIR MASS IS VERY UNSTABLE OVER
CENTRAL TX LATE TODAY. REGION WILL BE SKIRTED BY STRONG UPPER
SYSTEM MOVING ACROSS THE CENTRAL/SRN PLAINS AND SHOULD ENHANCE THE
POTENTIAL FOR AT LEAST ISOLATED SUPERCELL DEVELOPMENT ALONG THE DRY
LINE INTO CENTRAL TX. VERY LARGE HAIL WILL BE COMMON WITH ANY STORM
WHICH DEVELOPS THROUGH THE EVENING...AND SHEAR WILL BE SUFFICIENT
FOR A THREAT OF ISOLATED TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 27025.


...EVANS

[CrazyC83]

SEL8

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 298
NWS STORM PREDICTION CENTER NORMAN OK
425 PM CDT SAT MAY 10 2008

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

EASTERN ARKANSAS
MISSOURI BOOTHEEL
NORTHERN MISSISSIPPI
WESTERN TENNESSEE

EFFECTIVE THIS SATURDAY AFTERNOON FROM 425 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 3 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 80 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST OF
JONESBORO ARKANSAS TO 45 MILES NORTHEAST OF TUPELO MISSISSIPPI.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 293...WW 294...WW
295...WW 296...WW 297...

DISCUSSION...IMPRESSIVE SYSTEM WILL CONTINUE TO SPREAD EWD TOWARDS
THE MID SOUTH TONIGHT WITH THUNDERSTORMS BECOME MORE WIDESPREAD
ACROSS WW THIS EVENING. AIR MASS IS VERY UNSTABLE SOUTH OF A WARM
FRONT NOW EXTENDING FROM NERN AR INTO FAR SWRN TN...AND THIS FEATURE
SHOULD LIFT SLOWLY NWD THIS EVENING. THIS WILL CREATE A SETUP
INCREASINGLY FAVORABLE FOR SUPERCELLS AND BOWING SEGMENTS ACROSS THE
REGION. VERY LARGE HAIL...DAMAGING WINDS AND TORNADOES ARE ALL
POSSIBLE WELL AFTER DARK.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 26030.


...EVANS

[6SpeedTA95]

I've gotta cell going up just to my east, I'm gonna run snap a few pics

[MGC]

The dry line came through Norman OK a few hours ago. I can see towering culumus off to the east. I think a few of these could develope into severe storms over eastern OK later. It is going to be a interesting evening over AR today.......MGC

[KWT]

Got some powerful cells developing along the dryline fromthe looks of things over E.OK as it pushes slowly eastward.

[HarlequinBoy]

A long-lived hailstorm is approaching Jonesboro. Also storms along the dryline are starting to get warned.

[KWT]

Yep no doubt there are alot of chasers out there, I know the UK I'm tracking (now the 1st tour has gone home that had Mr.Fish) are chasing today and Stu Robinson is another one who is chasing is on stream:

http://www.severestudios.com/livechase

[HarlequinBoy]

Tornado Warning for eastern Labette County, Kansas.

[KWT]

I take it that the tornado warning is for the powerful cell in the SE of KS? Sorry I ask because my geography of the states isnt great!

[HarlequinBoy]

Yep.. but if those chasers are near McAlester they are in a good spot. That storm has rapidly gone tornadic.

* AT 512 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
POTENTIALLY TORNADIC THUNDERSTORM WITH STRONG LOW LEVEL ROTATION 4
MILES SOUTH OF CROWDER...MOVING EAST AT 25 MPH. THIS IS A DANGEROUS
STORM...A TORNADO IS OCCURRING OR COULD FORM AT ANY TIME.


* AT 512 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
POTENTIALLY TORNADIC THUNDERSTORM WITH STRONG LOW LEVEL ROTATION 5
MILES NORTH OF SAVANNA...MOVING EAST AT 25 MPH. THIS IS A DANGEROUS
STORM...A TORNADO IS OCCURRING OR COULD FORM AT ANY TIME.

[MGC]

First tornado warning in E OK......MGC