5/25/11 HIGH risk again in the mid-west and mid south

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Storm Prediction Center issues Mesoscale Discussion http://www.spc.noaa.gov/products/md/md0978.html

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Mesoscale Discussion 978

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MESOSCALE DISCUSSION 0978 NWS STORM PREDICTION CENTER NORMAN OK 1039 AM CDT THU MAY 26 2011 AREAS AFFECTED...SRN AL...FL PANHANDLE...SWRN GA CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 261539Z - 261715Z LATEST WV IMAGERY SUGGESTS A WEAK UPPER VORT MAY BE EMBEDDED WITHIN THE BASE OF THE LARGER TROUGH OVER SERN MS. THIS FEATURE IS SHIFTING EAST TOWARD SRN AL/FL PANHANDLE AND APPEARS TO BE AIDING ONGOING CONVECTION THAT HAS GRADUALLY INTENSIFIED OVER THE LAST HOUR. RADAR DATA SUGGEST THIS ACTIVITY IS MOVING EAST AT ROUGHLY 35KT AND IS SLOWLY TAKING ON CHARACTERISTICS OF A LINEAR MCS. GIVEN THE PROGRESSIVE NATURE OF THE UPPER TROUGH LATEST THINKING IS ONGOING TSTMS WILL MIGRATE ACROSS SRN AL INTO THE FL PANHANDLE AND PERHAPS EVEN SWRN GA BY 21Z. DAMAGING WINDS MAY BE NOTED WITH THIS CONVECTION AND A SEVERE TSTM WATCH IS BEING CONSIDERED. ..DARROW.. 05/26/2011

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MESOSCALE DISCUSSION 0981 NWS STORM PREDICTION CENTER NORMAN OK 1222 PM CDT THU MAY 26 2011 AREAS AFFECTED...SERN TN...NWRN GA...MOST OF AL...SERN MS CONCERNING...SEVERE THUNDERSTORM WATCH 379... VALID 261722Z - 261845Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 379 CONTINUES. IN THE WAKE OF A STRONG TO LOCALLY SEVERE TSTM CLUSTER PROGRESSING ACROSS ERN TN...NUMEROUS TSTM CLUSTERS APPEAR TO BE FORMING SWWD TO THE CNTRL GULF COAST. DESPITE THIS INCREASE IN TSTM COVERAGE...THE NEED FOR A SEVERE TSTM WATCH S/SW OF WW 379 IS UNCLEAR ATTM WITH SPORADIC THREATS OF MARGINALLY SEVERE DAMAGING WINDS AND HAIL. 17Z SUBJECTIVE SURFACE ANALYSIS PLACED A SW TO NE ORIENTED TROUGH/CONFLUENCE AXIS FROM JUST 20 S HSV TO 30 S JAN. TSTMS HAVE RECENTLY INCREASED ALONG AND AHEAD OF THIS AXIS IN ASSOCIATION WITH A WEAK UPPER IMPULSE OVER SERN MS EMBEDDED WITHIN THE BASE OF THE LARGER-SCALE TROUGH. EFFECTIVE SHEAR OF 25 TO 35 KT WILL LIKELY PEAK IN THE NEAR-TERM WITH SHORT-TERM MODEL GUIDANCE SUGGESTING LOW/MID-LEVEL FLOW WILL WEAKEN THROUGH THE AFTERNOON AS THE HEIGHT GRADIENT RELAXES. DESPITE A MODERATELY UNSTABLE AIR MASS...OVERALL SETUP SHOULD YIELD SPORADIC REPORTS OF DAMAGING WIND AND MARGINALLY SEVERE HAIL. AN ADDITIONAL WW TO THE S MAY NOT BE NECESSARY UNLESS A MORE ORGANIZED MCS/QLCS EVOLVES LATER THIS AFTERNOON. ..GRAMS.. 05/26/2011 ATTN...WFO...GSP...MRX...FFC...BMX...HUN...MOB...J AN...LIX... LAT...LON 32488891 33668760 35048590 35748467 35698408 35418374 35118385 33608534 32168553 31908571 31638701 31398785 30608848 30388896 30608945 31218966 31958947 32488891

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MOB: Toxey [Choctaw Co, AL] emergency mngr reports HAIL of half inch size (E0.50 INCH) at 01:27 PM CDT -- pea to small marble size hail in toxey and near gilbertown

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MOB: Thomasville [Clarke Co, AL] emergency mngr reports TSTM WND DMG at 01:20 PM CDT -- tree down on highway 5 in thomasville

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On a tornado warned cell now in South MS

[Joe-Nathan]

On a tornado warned cell now in South MS

Headed right for Picayune.




Sent from my iPhone using Tapatalk

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http://hotfile.com/dl/119019837/0d43d40/00327.MTS.html

[dkmac]

http://hotfile.com/dl/119019837/0d43d40/00327.MTS.html

Escatawba? Great picture, BTW!

[dkmac]

Slidell NWS:

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
645 PM CDT THU MAY 26 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0530 PM TSTM WND DMG MANDEVILLE 30.37N 90.08W
05/26/2011 ST. TAMMANY LA NWS EMPLOYEE

LARGE TREES WERE BLOWN DOWN ALONG HIGHWAY 1088 NEAR
CYPRESS STREET.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
451 PM CDT THU MAY 26 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0445 PM TORNADO 8 W SUN 30.65N 90.04W
05/26/2011 ST. TAMMANY LA LAW ENFORCEMENT

A TORNADO PRODUCED UNKNOWN DAMAGE IN THE VICINITY OF
HIGHWAY 40 AND BIRTRUE ROAD. LAW ENFORCEMENT IS
INVESTIGATING.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
512 PM CDT THU MAY 26 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0310 PM TSTM WND DMG 2 NNW MOSS POINT 30.45N 88.54W
05/26/2011 JACKSON MS COUNTY OFFICIAL

POSSIBLE TORNADO. FENCES BLOWN DOWN...PORTABLE OFFICE
BUILDING FLIPPED OVER...18 WHEELER FLIPPED...POWER LINES
DOWN...BARN DESTROYED. TIME ESTIMATED FROM RADAR.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
541 PM CDT THU MAY 26 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0535 PM FUNNEL CLOUD MANDEVILLE 30.37N 90.08W
05/26/2011 ST. TAMMANY LA NWS EMPLOYEE

NWS EMPLOYEES REPORT ROTATING WALL CLOUD PRODUCING FUNNEL
CLOUDS OVER MANDEVILLE.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
551 PM CDT THU MAY 26 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0545 PM FUNNEL CLOUD LACOMBE 30.31N 89.93W
05/26/2011 ST. TAMMANY LA AMATEUR RADIO

FUNNEL CLOUD OBSERVED INTHE LACOMBE AREA.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
609 PM CDT THU MAY 26 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0605 PM HAIL SLIDELL 30.28N 89.78W
05/26/2011 M1.25 INCH ST. TAMMANY LA NWS EMPLOYEE

HALF DOLLAR SIZE HAIL WAS OBSERVED AT THE NATIONAL
WEATHER SERVICE OFFICE.

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http://www.youtube.com/watch?v=HyWx4F7wvho

[dkmac]

Hailstorm in Lacombe, LA (about 10 miles West of Slidell, LA). I'll add that in the 40-odd years I've lived in the New Orleans area, I've only seen a couple of hail storms - very unusual phenomena down here.

[Joe-Nathan]

NWS N.O. LA MAY 26th EF3 BUSH, LA TORNADO REPORT:

NWS LINK: http://www.srh.noaa.gov/media/lix/BushWriteUp.pdf

A COUPLE OF YOUTUBE VIDS REFERENCED IN THE REPORT: