Historic Multi Day Tornado/Flooding Event 4/23-28/2011

[RL3AO]

Western Alabama. About as good of a looking sounding you get. Just a bit of a cap around 3km.

[GCANE]

HRRR forecasted helicity.

[Brent]

MESOSCALE DISCUSSION 0626
NWS STORM PREDICTION CENTER NORMAN OK
0105 PM CDT WED APR 27 2011

AREAS AFFECTED...MUCH OF AL INTO MIDDLE TN/NORTHWEST GA

CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY

VALID 271805Z - 271930Z

A LONG DURATION PARTICULARLY DANGEROUS /PDS/ TORNADO WATCH WILL BE
ISSUED BY MID AFTERNOON FOR MUCH OF AL INTO MIDDLE TN/NORTHWEST
GA...WITH AN ISSUANCE PROBABLE BY AROUND 19Z.

AMID CLOUD BREAKS...THE AIRMASS CONTINUES TO QUICKLY DESTABILIZE IN
THE WAKE OF A DECAYING MORNING WEST-EAST BOUNDARY ACROSS AL...AND TO
THE SOUTH OF A MORE RECENT MCS-INDUCED BOUNDARY/COLD POOL ACROSS FAR
NORTHERN AL. WITH A CLASSIC/SYNOPTICALLY EVIDENT OUTBREAK SETUP VIA
A SHORTWAVE TROUGH/STRONG JET STREAK CURRENTLY NEARING THE
LOWER-MIDDLE MS RIVER VALLEY PER SATELLITE IMAGERY...AN INCREASINGLY
VOLATILE SETUP IS LIKELY THROUGH THE AFTERNOON. SUPERCELLS CAPABLE
OF STRONG/VIOLENT TORNADOES ARE EXPECTED TO BECOME PREVALENT ACROSS
AN INCREASINGLY UNSTABLE/WEAKLY CAPPED WARM SECTOR...WITH WSR-88D
VWP OBSERVED AND RUC FORECASTS REFLECTING INCREASINGLY LONG/LOOPING
LOW LEVEL HODOGRAPHS. IN THE WAKE OF A MORNING SEVERE MCS...THE
AIRMASS IS EXPECTED TO RAPIDLY RECOVER ACROSS FAR NORTHERN AL INTO
MIDDLE TN BY LATE AFTERNOON/EARLY EVENING.

..GUYER.. 04/27/2011


ATTN...WFO...MRX...FFC...OHX...BMX...HUN...MOB...

[RL3AO]

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 235
NWS STORM PREDICTION CENTER NORMAN OK
145 PM CDT WED APR 27 2011

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

MUCH OF ALABAMA
NORTHWEST GEORGIA
SOUTHEAST MISSISSIPPI
SOUTHERN MIDDLE TENNESSEE

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 145 PM UNTIL
1000 PM CDT.

..THIS IS A PARTICULARLY DANGEROUS SITUATION

DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF
HUNTSVILLE ALABAMA TO 60 MILES WEST SOUTHWEST OF EVERGREEN
ALABAMA. 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 230...WW 231...WW
232...WW 233...WW 234...

DISCUSSION...A CLASSIC TORNADO OUTBREAK SITUATION IS DEVELOPING
ACROSS MUCH OF AL AS DISCRETE TORNADIC SUPERCELLS FORM OVER MS AND
TRACK ACROSS THE WATCH AREA. STRONG LOW LEVEL AND DEEP LAYER
VERTICAL SHEAR...COMBINED WITH A MOIST AND MODERATELY UNSTABLE AIR
MASS...WILL POSE A DANGEROUS RISK OF STRONG/VIOLENT AND POTENTIALLY
LONG-TRACK TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25040.

...HART

[Bunkertor]

# Tornado Watch 235 is 95/95

I have never read such

[RL3AO]

James Spann on the live stream.

Data shows a SIGTOR of 12.6 and he says "I didn't know it went above 10".

[Bunkertor]

James Spann on the live stream.

Data shows a SIGTOR of 12.6 and he says "I didn't know it went above 10".

Today i read all >1 is considered as good chances for F2+ . But frankly. I don´t know the difference ,for example, between 12 and 10.

[RL3AO]

[Bunkertor]

379
WFUS54 KJAN 271932
TORJAN
MSC069-103-159-272030-
/O.NEW.KJAN.TO.W.0145.110427T1932Z-110427T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
232 PM CDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
NORTHERN KEMPER COUNTY IN EAST CENTRAL MISSISSIPPI...
THIS INCLUDES THE CITY OF PRESTON...
NOXUBEE COUNTY IN EAST CENTRAL MISSISSIPPI...
SOUTHEASTERN WINSTON COUNTY IN EAST CENTRAL MISSISSIPPI...
THIS INCLUDES THE CITY OF NANIH WAIYA...

* UNTIL 330 PM CDT

* AT 231 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A POTENTIAL STRONG TORNADO 12 MILES SOUTHWEST OF NANIH
WAIYA MOVING NORTHEAST AT 50 MPH.

[Bunkertor]

567
WFUS54 KMEG 271923
TORMEG
MSC003-117-139-141-145-272000-
/O.NEW.KMEG.TO.W.0117.110427T1923Z-110427T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
223 PM CDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* TORNADO WARNING FOR...
SOUTHEASTERN ALCORN COUNTY IN NORTHEAST MISSISSIPPI...
NORTHERN PRENTISS COUNTY IN NORTHEAST MISSISSIPPI...
SOUTHEASTERN TIPPAH COUNTY IN NORTHEAST MISSISSIPPI...
NORTHERN TISHOMINGO COUNTY IN NORTHEAST MISSISSIPPI...
UNION COUNTY IN NORTHEAST MISSISSIPPI...

* UNTIL 300 PM CDT

* AT 153 PM CDT...LOCAL FIRE DEPARTMENT REPORTED A TORNADO TOUCHDOWN
IN SOUTHERN LAFAYETTE COUNTY. THIS TORNADO IS NOW ENTERING NEW
ALBANY...MOVING NORTHEAST AT 55 MPH. THIS IS A DANGEROUS SITUATION.
PEOPLE IN NEW ALBANY SHOULD TAKE COVER IMMEDIATELY.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BOONEVILLE...IUKA AND NEW ALBANY.

[Brent]

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
NORTHEASTERN NESHOBA COUNTY...

...THIS IS A TORNADO EMERGENCY FOR THE WARNED AREA...

AT 236 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS AND STORM
SPOTTERS WERE TRACKING A LARGE AND EXTREMELY DANGEROUS TORNADO. THIS
TORNADO WAS LOCATED NEAR BURNSIDE MOVING NORTHEAST AT 50 MPH.

[RL3AO]

33/40 tornado on the ground on TV cameras.

[RL3AO]

Tornado on the ground visible on skycam. Cullman, AL.

[RL3AO]

[RL3AO]

Must watch

http://www.ustream.tv/channel/ABC-33-40-Main

[Bunkertor]

That thing reminds me of the famous Tornado at the railway, where cars-size debris was lifeted 20 ,30 me high or so. Was intercepted by a cop

[Brent]

Must watch

http://www.ustream.tv/channel/ABC-33-40-Main

This is like something from Kansas. Unreal for Alabama.

[Bunkertor]

Cam has died. We all gotta search for an alternative coverage

Negative http://www.wkrg.com/ ; http://www2.alabamas13.com/

[RL3AO]

[RL3AO]

This is at minimum an EF4.