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January 22-23 Potential Severe Weather


Hoosier

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MESOSCALE DISCUSSION 0045

NWS STORM PREDICTION CENTER NORMAN OK

0226 PM CST SUN JAN 22 2012

AREAS AFFECTED...NERN TX...NRN LA...SRN/ERN AR...NWRN MS...WRN TN

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

VALID 222026Z - 222230Z

SEVERE THUNDERSTORMS SHOULD INITIATE BY EARLY EVENING NEAR THE

ARKLATEX THEN RACE NEWD TOWARD WRN TN/NWRN MS AFTER DARK. DAMAGING

WINDS AND ISOLATED TORNADOES ARE EXPECTED. A TORNADO WATCH WILL

LIKELY BE REQUIRED BY 00Z.

LEADING EDGE OF WELL DEFINED UPPER TROUGH IS ADVANCING ACROSS ERN

OK/NERN TX AND WILL SOON OVERSPREAD THE LOWER MS VALLEY. IN ADVANCE

OF THIS FEATURE...WARM MOIST BOUNDARY LAYER HAS SPREAD INTO SRN/ERN

AR...AS NOTED BY SFC DEW POINTS RISING THROUGH THE UPPER 50S INTO

THE 60S...WHILE A STUBBORN WEDGE OF COOLER AIR HAS YET TO BE

DISPLACED OVER MUCH OF CNTRL/NWRN AR. CURRENT THINKING IS GREATEST

AIRMASS DESTABILIZATION WILL OCCUR TO THE S-E OF THE AFOREMENTIONED

WEDGE FRONT AND THIS WILL BE THE CORRIDOR OF GREATEST SEVERE

THUNDERSTORM POTENTIAL.

LATEST VIS IMAGERY DEPICTS AN INCREASING BAND OF LOW LEVEL CU ALONG

THE DRY LINE NEAR I-35 OVER NCNTRL TX. THIS IS ALONG THE LEADING

EDGE OF STEEPER LAPSE RATES AND IS CERTAINLY INDICATIVE OF STRONGER

FORCING THAT WILL SOON OVERSPREAD THE ARKLATEX. WITH TIME

THUNDERSTORMS COULD EVOLVE ALONG THIS LINE...OR PERHAPS EVEN DEVELOP

WELL AHEAD OF THE WIND SHIFT WITHIN DEEPER CONFLUENT ZONE NEAR THE

LA BORDER AS EXHIBITED BY SHOWERS BEGINNING TO DEEPEN FROM NEAR TYR

TO JUST WEST OF SHV. NEEDLESS TO SAY VERY STRONG SHEAR WILL SUPPORT

SUPERCELL DEVELOPMENT AND THE POTENTIAL FOR TORNADOES.

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HRRR continues to show cells in front of the main line in Ohio. Scary thing is a F4 tornado hit this county in January in the 1970s I believe, strongest recorded tornado for this county. Not many people living there back then, rural area.

Correction F3 on Febuary 22, 1971 7 miles away from center of city.

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HRRR continues to show cells in front of the main line in Ohio. Scary thing is a F4 tornado hit this county in January in the 1970s I believe, strongest recorded tornado for this county. Not many people living there back then, rural area.

Correction F3 on Febuary 22, 1971 7 miles away from center of city.

nothing like 3am supercell development :yikes:

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From late afternoon AFD from IWX...

HOWEVER...THE SFC WARM FRONT

WILL REMAIN WELL SOUTH OF THE REGION...WITH AN INVERSION REMAINING

GIVEN SNOW PACK AND STRONG EAST COMPONENT TO THE LL FLOW.

HENCE...SEVERE THUNDERSTORM THREAT WILL REMAIN HIGHLY LIMITED...WITH

THE BEST CHANCE FOR DAMAGING CONVECTIVE WIND IN THE SOUTHERN

FA...GIVEN THE POTENTIAL FOR AN ELEVATED QLCS WITH MID LEVEL FLOW

IMPINGING JET CORES. RETAINED GUSTY WIND TS MENTION ATTM.

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Jesus...LOT even mentioning chance at a tornado in southeast CWA. What I'd pay to see a tornado suck up snow.

THIS SETUP WOULD FURTHER HELP

FOR WINDS TO PUNCH THE INVERSION AND MAKE IT TO THE SURFACE WITHIN

SHOWERS AND ESPECIALLY ORGANIZED THUNDERSTORMS. FORECAST NAM

SOUNDINGS AT CHAMPAIGN SHOW ALMOST 70 KTS AND 3000 FT...SO PLENTY

AVAILABLE TO MIX DOWN. THIS SETUP WILL NEED TO BE WATCHED TOO FOR

THE CHANCE OF A TORNADO AS FAR NORTH AS OUR SOUTHEAST FORECAST

AREA...AS FORECAST PROFILES AND SYNOPTICS APPROACH THOSE THAT CAN

PRODUCE COOL SEASON EPISODES.

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PUBLIC SEVERE WEATHER OUTLOOK

NWS STORM PREDICTION CENTER NORMAN OK

0235 PM CST SUN JAN 22 2012

...WIDESPREAD SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE LOWER

MISSISSIPPI...LOWER OHIO...AND TENNESSEE VALLEYS LATE THIS AFTERNOON

THROUGH EARLY MONDAY...

THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE

DEVELOPMENT OF TORNADOES...WIDESPREAD DAMAGING WINDS...AND HAIL OVER

PARTS OF THE LOWER MISSISSIPPI...LOWER OHIO...AND TENNESSEE VALLEYS

LATE THIS AFTERNOON THROUGH EARLY MONDAY.

THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE

NORTHWEST ALABAMA

EASTERN ARKANSAS

SOUTHERN ILLINOIS

SOUTHERN INDIANA

WESTERN AND CENTRAL KENTUCKY

SOUTHEASTERN MISSOURI

NORTHERN AND CENTRAL MISSISSIPPI

WESTERN AND MIDDLE TENNESSEE

SURROUNDING THE GREATEST RISK AREA...SEVERE STORMS ARE ALSO POSSIBLE

FROM THE CENTRAL GULF COAST NORTH AND NORTHEAST INTO PARTS OF

MICHIGAN...OHIO...AND THE WESTERN SLOPES OF THE SOUTHERN AND CENTRAL

APPALACHIANS.

A POWERFUL JET STREAM DISTURBANCE OVER THE SOUTHERN PLAINS THIS

AFTERNOON WILL CONTINUE TO MOVE RAPIDLY EAST-NORTHEASTWARD TO THE

MISSISSIPPI AND OHIO VALLEYS TONIGHT AND EARLY MONDAY.

IN ASSOCIATION WITH THE JET STREAM IMPULSE...A STRONG SURFACE LOW

WILL TRACK EAST ACROSS EASTERN KANSAS THIS AFTERNOON...AND THEN

NORTHEAST ACROSS MISSOURI AND IOWA TONIGHT...BEFORE REACHING

WISCONSIN EARLY MONDAY. AHEAD OF THE LOW...A BROAD CURRENT OF FAST

SOUTHERLY WINDS WILL USHER UNSEASONABLY WARM AND MOIST AIR NORTHWARD

ACROSS THE LOWER MISSISSIPPI...LOWER OHIO AND TENNESSEE VALLEYS.

A COLD FRONT TRAILING SOUTH FROM THE LOW WILL SERVE AS A FOCUS FOR

INTENSE THUNDERSTORM DEVELOPMENT LATE THIS AFTERNOON THROUGH TONIGHT

OVER PARTS OF ILLINOIS...SOUTHEAST MISSOURI...ARKANSAS...AND

LOUISIANA AS THE FRONT ENCOUNTERS THE INCREASINGLY WARM AND HUMID

AIR.

AS THE STORMS BUILD AND INTERACT WITH THE JET STREAM WINDS...SOME OF

THEM LIKELY WILL BECOME LONG-LIVED SUPERCELLS...POSING A RISK FOR

STRONG TORNADOES IN ADDITION TO DAMAGING WIND AND HAIL. THE TORNADO

THREAT SHOULD BE GREATEST THIS EVENING AND EARLY TONIGHT OVER

EASTERN ARKANSAS...NORTHERN MISSISSIPPI...AND WESTERN TENNESSEE.

THE STORMS LIKELY WILL EVOLVE INTO AN EXTENSIVE LINE LATER

TONIGHT...EXTENDING THE RISK FOR DAMAGING WIND AND POSSIBLE

TORNADOES THROUGH DAWN MONDAY NORTHWARD AND EASTWARD TO THE WESTERN

SLOPES OF THE SOUTHERN AND CENTRAL APPALACHIANS.

STATE AND LOCAL EMERGENCY MANAGERS ARE MONITORING THIS DEVELOPING

SITUATION. THOSE IN THE THREATENED AREA ARE URGED TO REVIEW SEVERE

WEATHER SAFETY RULES AND TO LISTEN TO RADIO...TELEVISION...AND NOAA

WEATHER RADIO FOR POSSIBLE WATCHES...WARNINGS...AND STATEMENTS LATER

TODAY.

..GUYER/MEAD/CORFIDI.. 01/22/2012

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