Severe Thunderstorm Warning 138, NWS Huntsville, AL

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1100 AM CDT WED AUG 27 2003

.UPDATE...
PATCHY A.M. FOG HAS GIVEN WAY TO PLENTY OF HAZE ACROSS THE HUN CWA.
CU FIELD FILLING IN NICELY WITH THE LATE MORNING SUN...AND EXPECT
THAT TO CONTINUE THRU THE AFTN HOURS. PREVIOUS UPDATE TOOK OUT THE
MORNING WORDING AND MAINTAINS ISOLD SHRA/TSRA WITH A 20 POP. MORNING
SHORTWAVE-INDUCED CONVECTION HAS BEEN INFLUENCED BY THE HUN FORCE
FIELD...APPROPRIATELY WEAKENING AND DYING OFF OR MOVING ACROSS THE
BORDER INTO TN. WITH SHORTWAVE IMPACT ONLY MINIMAL AT THIS
POINT...SEE NO REASON TO RAISE POPS BEYOND THE 20 RIGHT NOW.

ONLY FLY IN THE OINTMENT IS TEMPS. THINGS ALREADY PLENTY
MUGGY...WITH TEMPS IN THE UPPER 80S AND DEWPTS IN THE MID 70S (UGH).
THINK THE CU FIELD WILL LIMIT TEMPS A BIT...BUT CERTAINLY NOT ENOUGH
TO JUSTIFY KEEPING MAXES NEAR 90. WILL UPDATE EVERYWHERE TO INCREASE
MAX TEMPS AT LEAST INTO THE LOWER 90S...AND MAYBE MORE THAN
THAT...BUT OTHERWISE WILL LEAVE FORECAST ALONE FOR NOW.

.SUMMARY...
UPDATE TO ZONES AND GRIDS FORTHCOMING...TO BUMP UP MAX TEMPS FIRST
PD.

.HUN...NONE.

BCC/27

ALZ001>010-016-281000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
130 PM CDT WED AUG 27 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA.

.DAY ONE...(THIS AFTERNOON AND TONIGHT)...

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE DEVELOPING ACROSS
NORTH ALABAMA THIS AFTERNOON. DUE TO WEAK WINDS THROUGHOUT THE
ATMOSPHERE...ANY THUNDERSTORMS THAT FORM WILL BE SLOW MOVERS. WHILE
PROLONGED PERIODS OF HEAVY RAIN ARE POSSIBLE...WIDESPREAD FLASH
FLOODING IS NOT EXPECTED. FREQUENT CLOUD TO GROUND LIGHTNING...ALONG
WITH WIND GUSTS TO 35 MPH AND SMALL HAIL...ARE ALSO POTENTIAL THREATS
FROM THUNDERSTORMS THIS AFTERNOON.

HOWEVER...IT SHOULD BE NOTED THAT MANY AREAS WILL RECEIVE NO RAINFALL
AT ALL. AREAS THAT DO NOT EXPERIENCE RAIN WILL SEE ANOTHER PARTLY
SUNNY AND HOT AFTERNOON. TEMPERATURES REACHING INTO THE LOWER 90S...
COUPLED WITH TYPICAL SUMMERTIME HUMIDITY...WILL PUSH HEAT INDICES TO
NEAR 100 DEGREES. ANYONE PARTICIPATING IN OUTDOOR ACTIVITIES THIS
AFTERNOON SHOULD REMEMBER TO TAKE FREQUENT BREAKS AND DRINK PLENTY OF
WATER.

.DAYS TWO THROUGH SEVEN...(THURSDAY THROUGH TUESDAY)...

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

A RETURN OF LOW-LEVEL MOISTURE IS EXPECTED OVER NORTHERN ALABAMA
FOR THE LATER HALF OF THE WEEK. INCREASED ATMOSPHERIC INSTABILITY
DUE TO DAYTIME HEATING...WILL CAUSE ISOLATED SHOWERS AND
THUNDERSTORMS TO DEVELOP. THE MID AFTERNOON TO EARLY EVENING HOURS IS
THE MOST LIKELY TIME FOR THUNDERSTORM FORMATION.

RAIN CHANCES WILL INCREASE OVER THE LABOR DAY WEEKEND...AS A COLD
FRONT APPROACHES THE REGION FROM THE MIDWEST. A TROPICAL SYSTEM OVER
THE WESTERN CARIBBEAN WILL BE MOVING NORTHWEST THROUGH THE WEEKEND.
IF THIS SYSTEM WAS TO DEVELOP...THIS COULD INCREASE THE CHANCES OF
RAIN ACROSS THE SOUTHEASTERN STATES.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
NOT ANTICIPATED.

BCC

ALZ001-002-271915-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
113 PM CDT WED AUG 27 2003

...SIGNIFICANT WEATHER ALERT FOR THUNDERSTORMS CONTAINING HEAVY
RAIN AND FREQUENT CLOUD TO GROUND LIGHTNING...

AS OF 1 PM...A LINE OF THUNDERSTORMS EXTENDED FROM NEAR CHEROKEE...
TO NEAR KILLEN...TO NEAR LEXINGTON. THESE STORMS WERE MOVING EASTWARD
AT AROUND 10 MPH...AND WERE MOVING OVER AREAS THAT HAVE ALREADY
RECEIVED RAINFALL EARLIER THIS AFTERNOON...ESPECIALLY IN EASTERN
COLBERT COUNTY. LOCATIONS SUCH AS TUSCUMBIA...MUSCLE SHOALS...AND
LEIGHTON...MAY RECEIVE UP TO AN INCH AND A HALF OF RAINFALL OVER A
VERY SHORT TIME. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT
FOR RAPIDLY FILLING DRAINAGE DITCHES AND CREEKS.

IN ADDITION...THESE STORMS ARE PRODUCING FREQUENT CLOUD TO GROUND
LIGHTNING. THOSE PARTICIPATING IN OUTDOOR ACTIVITIES SHOULD MOVE
INSIDE IMMEDIATELY AND WAIT FOR THE STORM TO PASS. OTHERWISE...STAY
AWAY FROM ELECTRONIC DEVICES AND TELEPHONES...UNTIL THE LIGHTNING
SUBSIDES.

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