Severe Thunderstorm Warning 1, NWS Huntsville, AL

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1156 AM CST SUN JAN 13 2013

.UPDATE...
FOR 18Z TAFS

&&

.DISCUSSION...
/ISSUED 1033 AM CST SUN JAN 13 2013/
THE LATEST 16Z SURFACE ANALYSIS INDICATES THAT THE COLD FRONT
CONTINUES TO SAG SOUTHEAST CLOSER TO THE FORECAST AREA. THE COLD
FRONT WAS SITUATED FROM A FEW MILES EAST OF OWENSBORO KENTUCKY...
EXTENDING SOUTHWEST TO BETWEEN CLARKSVILLE AND NASHVILLE
TENNESSEE...THEN FURTHER SOUTHWEST BETWEEN OXFORD AND TUPELO
MISSISSIPPI. THERE IS A SHARP TEMP CONTRAST AHEAD AND BEHIND THE
FRONT...WITH AS MUCH AS A 25-30 DEGREE DIFFERENCE NOTED.

WILL CONTINUE WITH THE CURRENT FLASH FLOOD WATCH WORDING FOR MY
NORTHWEST ALABAMA COUNTIES...AS AREAS OF SHOWERS AND STORMS SHOULD
BEGIN TO OVERSPREAD THIS AREA BY EARLY THIS AFTERNOON. TEMPS WILL
FALL QUICKLY WHERE THE COLD FRONT PASSES...SO EXPECT THE SHOALS AREA
TO SEE A QUICK TEMP DROP BY LATE AFTERNOON...FOLLOWED BY THE REST OF
THE FORECAST AREA BY THE LATE AFTERNOON/EVENING TIME PERIOD. WITH
HIGH PWAT VALUES AND EXPECTED HEAVY RAINFALL...WILL BE MONITORING THE
FLASH FLOOD WATCH AREA AND THE REST OF THE FORECAST AREA CLOSELY
THROUGH THE AFTERNOON. WILL ONLY MAKE MINOR WORDING AND TEMP CHANGES
FOR THIS FORECAST UPDATE.

TT

&&

.AVIATION...
FOR 18Z TAFS...HAVE CONTINUED BASICALLY WITH IFR CONDITIONS THROUGH
MOST OF THE FORECAST AS LOW CLOUDS AND RAIN SHOULD SPREAD ACROSS THE
AREA. HAVE IMPROVED CONDITIONS AT MSL AFTER 10Z...AS EXPECT SOME
BREAKS IN THE LOWER CLOUDS BETWEEN 10Z TO 14Z.

TT

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR ALZ001>005.

TN...NONE.
&&

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE
AT WEATHER.GOV/HUNTSVILLE.

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
224 PM CST SUN JAN 13 2013

ALZ001>010-016-TNZ076-096-097-141000-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
224 PM CST SUN JAN 13 2013

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

.DAY ONE...TONIGHT...

HEAVY RAINFALL IS EXPECTED THROUGH TONIGHT AS A COLD FRONT MOVES INTO
THE AREA...ELEVATING THE RISK OF FLASH FLOODING...ESPECIALLY OVER
NORTHWEST ALABAMA. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES WITH
ISOLATED HIGHER AMOUNTS ARE POSSIBLE. PLEASE CONSULT THE FLASH FLOOD
WATCH THAT HAS BEEN ISSUED FOR THAT AREA FOR MORE INFORMATION.

IN ADDITION...THERE IS A LOW CHANCE OF THUNDERSTORMS THROUGH
TONIGHT...ALONG AND AHEAD OF THE COLD FRONT...AS IT MOVES INTO THE
AREA. WIND GUSTS FROM 30 TO 40 MPH...LIGHTNING...AND LOCALLY HEAVY
RAINFALL WILL BE THE PRIMARY HAZARDS WITH THE STORMS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THE HEAVIEST RAINFALL IS EXPECTED TO CONTINUE FROM MONDAY THROUGH
TUESDAY. THIS WILL HEIGHTEN THE POSSIBILITY FOR AREAL AND RIVER
FLOODING.

AS COLDER AIR CONTINUES TO FILTER INTO THE REGION...THERE IS A SMALL
RISK OF SLEET FOR A SHORT PERIOD OF TIME ON MONDAY...MAINLY IN
NORTHWEST ALABAMA. AT THIS TIME...NO ACCUMULATION OF SLEET IS
EXPECTED.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL MAY
BE NEEDED DUE TO THE HEAVY RAINFALL THREAT THROUGH MONDAY.

TT

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