Area Forecast Discussion
Issued by NWS Huntsville, AL

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FXUS64 KHUN 270524 AAC
AFDHUN

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1224 AM CDT FRI MAR 27 2015

.UPDATE...
FOR 06Z TAFS

&&

.DISCUSSION...
/ISSUED 845 PM CDT THU MAR 26 2015/

THE COLD FRONT THAT CROSSED OVER THE REGION EARLIER THIS AFTERNOON IS
CURRENTLY LOCATED FROM NW GA (NEAR KRMG) TO CENTRAL AL/S MS (NEAR
KBHM) AS THE PARENT LONGWAVE TROUGH EDGES EASTWARD FROM THE
MIDWEST/PLAINS. CAA BEHIND THIS SWIFTLY MOVING COLD FRONT PREVAILS
ACROSS THE TN VALLEY WITH TEMPERATURES ALREADY FALLING INTO THE UPPER
40S ACROSS NW AL AFTER DAYTIME HIGHS REGISTERED IN THE 70S TODAY.
TEMPERATURES ARE FALLING A LITTLE QUICKER THAN ORIGINALLY FORECAST
MAINLY OVER NW AL AND HAVE MADE ADJUSTMENTS TO ACCOUNT FOR THIS
TREND. HOWEVER, IT DOES APPEAR THAT OVERNIGHT LOW TEMPERATURES ARE A
TAD TOO COOL AND RAISED THEM SLIGHTLY ESPECIALLY OVER NE AL WHERE THE
FRONT JUST CROSSED. SIMILAR TWEAKS TO THE DEWPOINT TEMPERATURE
FORECAST WERE ALSO REQUIRED TO ACCOUNT FOR QUICKER DRYING OF THE SFC
LAYER TONIGHT.

FURTHERMORE, GIVEN THE STABILIZATION OF THE LOW LEVELS FOR SB
PARCELS, AND ALMOST MOIST ADIABATIC SOUNDING PROFILE ALOFT, HAVE
REMOVED MENTION OF THUNDERSTORMS THROUGH THE REST OF TONIGHT. DID
KEEP HIGH POPS AND RAIN SHOWERS THROUGH 06Z DUE TO POST-FRONTAL
SHOWERS. OTHERWISE, TAILORED POPS DOWNWARD AFTER 06Z. LASTLY, THE SKY
COVER FORECAST NEEDED ADJUSTMENTS DUE TO RAPID BREAKING OF LOW LEVEL
CLOUDS OVER N MS AND THE CLEARING LINE APPROACHING THE REGION. THIS
CLEARING OF CLOUDS WILL BE SHORT-LIVED AS MID-LEVEL CLOUD COVER
APPROACHES FROM THE MIDWEST ON THE NW FLANK OF THE PREVAILING
LONGWAVE TROUGH.

SL.77

&&

.AVIATION...
FOR 06Z TAFS...

MVFR CIGS SHOULD PREVAIL THROUGH THE NEXT 3-6 HOURS AS CLOUDS SLOWLY
RECEDE BEHIND THE COLD FRONT THAT PASSED OVER THE REGION. -RA IS
POSSIBLE MAINLY AT KHSV BTWN 27/06Z-09Z. VFR CONDITIONS ARE THEN
EXPECTED TO RETURN AFTER 27/0930Z AT KMSL AND 27/1130Z AT KHSV WITH
NORTH WINDS OF 8-10 KTS PREVAILING.

SL.77

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
TN...NONE.
&&

$$

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


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