Area Forecast Discussion
Issued by NWS Huntsville, AL

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FXUS64 KHUN 180533 AAC
AFDHUN

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1133 PM CST TUE DEC 17 2013

.UPDATE...
FOR 06Z TAFS

&&

.DISCUSSION...
/ISSUED 853 PM CST TUE DEC 17 2013/

A DRY COLD FRONT HAS CROSSED OVER THE TN VALLEY AND IS NOW CURRENTLY
NEAR THE INTERSTATE 20 CORRIDOR. THE PRIMARY EFFECT TO THIS FRONTAL
PASSAGE WILL BE THE DROP IN TEMPERATURES AND DEWPOINTS OVER THE NEXT
6-12 HOURS. NORTHWEST WINDS OF 5-9 MPH WILL ALSO BE PRESENT AS WEAK
COLD AIR ADVECTION REMAINS ACROSS THE REGION. AFTER LOOKING AT THE
ONGOING FORECAST IT APPEARS THAT WE ARE COOLING MORE SLOWLY THAN
ORIGINALLY ANTICIPATED. THUS, HAVE RAISED THE OVERNIGHT LOWS A COUPLE
OF DEGREES AND SLOWED THE COOLING TREND. EVEN WITH THOSE ADJUSTMENTS,
TEMPERATURES SHOULD STILL DROP BELOW FREEZING ACROSS MOST OF THE
AREA. DEWPOINTS WERE ALSO ADJUSTED TO ACCOUNT FOR THE CURRENT TRENDS.

ADDITIONALLY, MOSTLY CLEAR SKY COVER SHOULD PREVAIL FOR THE REST OF
THE NIGHT, WITH HIGH LEVEL CIRRUS CROSSING MAINLY OVER TN/KY. THIS
CIRRUS IS ORIGINATING FROM THE UPPER LEVEL JET THAT HAS PUSHED
SOUTHEAST AS AN UPPER TROUGH AXIS PUSHES ACROSS
APPALACHIA/CANADA/NEW ENGLAND AREA.

OTHERWISE, THE REST OF THE FORECAST LOOKS FINE.

SL.77

&&

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

VFR CONDITIONS ARE EXPECTED ACROSS N AL/S MIDDLE TN FOR THE NEXT 24
HOURS WITH LLWS (WS015/36030KT) POSSIBLE BTWN 06-12Z.

SL.77

&&

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

$$

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AT WEATHER.GOV/HUNTSVILLE.
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