Tornado Watch # 227 - 20090502

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wb5rmg
Posts: 348
Joined: Fri Sep 05, 2008 9:47 pm
First Name: Alan
Last Name: Sieg
City: Madison
State: AL
Mail Zip Code: 35758
License Class: Extra
Location: Sullivan @ Browns Ferry in Madison, AL
Contact:

Tornado Watch # 227 - 20090502

Post by wb5rmg » Sat May 02, 2009 2:27 pm

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 227
NWS STORM PREDICTION CENTER NORMAN OK
300 PM CDT SAT MAY 2 2009

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

NORTHERN ALABAMA
NORTH-CENTRAL MISSISSIPPI

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 300 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 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH SOUTHWEST OF
GREENVILLE MISSISSIPPI TO 30 MILES EAST NORTHEAST OF GADSDEN
ALABAMA. 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 225...WW 226...

DISCUSSION...STORMS INCREASING WITHIN REMNANT MCV AND ALONG FRONTAL
ZONE NEAR AL/MS BORDER HAVE RECENTLY REACHED SEVERE LEVELS WITH SOME
REPORTS OF TORNADOES. THIS CONVECTION WAS WELL IN ADVANCE OF
STRONGER SYSTEM DEVELOPING EAST FROM NERN TX BUT THE ACTIVITY WILL
CONTINUE TO MOVE EAST INTO RECOVERING AIR MASS ACROSS NRN AL.
INCREASING DEEP-LAYER FLOW IN A BAND SOUTH OF THE MCV...AND
INCREASING INSTABILITY OVER AL SHOULD CONTINUE TO SUPPORT SOME
SEVERE STORMS WITH WIND AND PERHAPS SOME HAIL. GREATER AND MORE
WIDESPREAD TORNADO AND WIND THREAT EXPECTED TO EVOLVE EWD FROM AR
INTO MS AND THEN AGAIN AL LATER TODAY. THIS CONVECTION WILL BE
ASSOCIATED WITH LARGE SCALE ASCENT AHEAD OF EWD MOVING MID/UPPER
LEVEL WAVE. CELLS TRACKING ALONG NEAR THE FRONTAL ZONE AND VARIOUS
OUTFLOW BOUNDARIES FROM ONGOING ACTIVITY WILL HAVE ACCESS TO
STRONGER LOW LEVEL SHEAR AND COULD PRODUCE A FEW TORNADOES IN
ADDITION TO LARGE HAIL AND WIND.

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.


...CARBIN

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##############################################################################

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1247 PM CDT SAT MAY 2 2009

ALZ001>010-016-TNZ076-096-097-030015-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
1247 PM CDT SAT MAY 2 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS
OF SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

A LARGE AREA OF SHOWERS AND THUNDERSTORMS WILL MOVE INTO NORTHERN
ALABAMA AND PORTIONS OF SOUTHERN MIDDLE TENNESSEE THIS
AFTERNOON...BRINGING MORE HEAVY RAINFALL TO THE AREA.
WIDESPREAD RAINFALL AMOUNTS AROUND ONE INCH...WITH ISOLATED
AMOUNTS AROUND TWO INCHES CAN BE EXPECTED WITH THIS NEXT BATCH OF
PRECIPITATION INTO THE EVENING HOURS. ANY STRONGER STORMS WILL BE
CAPABLE OF PRODUCING HEAVY RAINFALL AMOUNTS IN A SHORT PERIOD OF
TIME. GIVEN THE RECENT HEAVY RAINS...NUMEROUS INSTANCES OF FLASH
FLOODING WILL BE POSSIBLE ACROSS THE OUTLOOK AREA...PARTICULARLY
IN URBAN AND LOW-LYING AREAS. IN ADDITION TO THE POTENTIAL FOR
FLOODING AND FLASH FLOODING...SOME STORMS MAY BE CAPABLE OF
PRODUCING SMALL HAIL AND STRONG WIND GUSTS.

THE POSSIBILITY FOR HEAVY SHOWERS AND THUNDERSTORMS WILL CONTINUE
INTO TONIGHT AS ANOTHER UPPER LEVEL DISTURBANCE CROSSES THE AREA.
MORE INSTANCES OF FLASH FLOODING WILL BE POSSIBLE WITH ANY FURTHER
ACTIVITY THAT DEVELOPS TONIGHT.


.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE AREA
ON SUNDAY AS A LOW PRESSURE SYSTEM MOVES ALONG THE FRONT TO OUR
NORTH AND A VIGOROUS UPPER LEVEL DISTURBANCE CROSSES THE AREA.
WIDESPREAD HEAVY RAINFALL WILL LEAD TO FURTHER FLOODING AND FLASH
FLOODING POTENTIAL ACROSS THE AREA. IN ADDITION TO THE FLOODING
THREAT...GIVEN THE STRENGTH OF THE SYSTEMS INVOLVED
TOMORROW...SEVERE WEATHER WILL BE A POSSIBILITY...INCLUDING LARGE
HAIL...DAMAGING WIND GUSTS...AND ISOLATED TORNADOES. THE
POSSIBILITY FOR SEVERE WEATHER WILL LINGER THROUGH MONDAY...BEFORE
A COLD FRONT CROSSES THE AREA MONDAY NIGHT.

THE POTENTIAL EXISTS FOR A SIGNIFICANT FLOODING EVENT ACROSS THE
AREA THROUGH LATE SUNDAY AND PERHAPS INTO MONDAY AS NUMEROUS
STREAMS MAY REACH OR EXCEED BANKFULL STAGES. RESIDENTS AND THOSE
TRAVELING THROUGH THE AREA ARE ENCOURAGED TO MONITOR THE LATEST
INFORMATION PROVIDED BY THE NATIONAL WEATHER SERVICE OR THEIR
FAVORITE MEDIA OUTLET REGARDING THIS SITUATION.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL
IS POSSIBLE MAY BE REQUESTED LATER TODAY TO ASSIST IN SEVERE
WEATHER/FLASH FLOODING OPERATIONS. IN ADDITION...FIRST RESPONSE
AGENCIES ARE ENCOURAGED TO MONITOR THE LATEST WEATHER REPORTS AND
UPDATES.

$$

KDW
###### WB5RMG is Alan Sieg ## http://wb5rmg.wordpress.com ######
ARRL/ARES Assistant Emergency Coordinator, Madison County Alabama

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