Area Forecast Discussion
Issued by NWS Huntsville, AL

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000
FXUS64 KHUN 141726 AAC
AFDHUN

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1226 PM CDT SUN SEP 14 2014

.UPDATE...
FOR 18Z TAFS

&&

.DISCUSSION...
/ISSUED 1006 AM CDT SUN SEP 14 2014/
A VERY PLEASANT MORNING IS UNDERWAY ACROSS THE TENNESSEE VALLEY, WITH
TEMPERATURES IN THE LOWER/MIDDLE 60S, AND DEWPOINTS IN THE MIDDLE
50S. COMPARED TO YESTERDAY AT THIS TIME WHEN LOW CLOUDS ENCOMPASSED
ALL OF THE CWFA, SUNSHINE ABOUNDS IN THE WESTERN 2/3RDS OF THE AREA,
WITH ONLY THE EASTERN THIRD OF THE AREA IN NORTHEASTERN ALABAMA AND
SOUTHERN MIDDLE TENNESSEE UNDER THE CANOPY OF LOW CLOUDS (AOB
900FT). AS A RESULT, TEMPS ARE OBVIOUSLY SLOW TO RISE THERE THIS
MORNING, AND A FEW LOWER 60S ARE STILL LINGERING IN THESE LOCATIONS
AT THIS HOUR.

SFC HIGH PRESSURE MEANDERING SLOWLY EASTWARD ACROSS THE LOWER GREAT
LAKES/UPPER OH VALLEY WILL CONTINUE TO DO SO THROUGH THE DAY TODAY,
KEEPING NORTH/NORTHEASTERLY WINDS IN PLACE ACROSS THE REGION. WITH
THE DEPARTED SFC FRONT WELL TO OUR SOUTH, THE PRESSURE GRADIENT IS
MORE RELAXED TODAY AS COMPARED TO YESTERDAY, SO GUSTS ~20KTS AREN`T
ANTICIPATED. IN FACT, WE LIKELY WON`T SEE ANYTHING MUCH HIGHER THAN A
10KT WIND THIS AFTERNOON (AT BEST).

FOR THE MORNING FORECAST UPDATE, SEVERAL CHANGES WERE WARRANTED GIVEN
THE PESKY LOW CLOUDS IN THE EASTERN THIRD OF THE CWFA. AFTN HIGHS
WERE DECREASED A COUPLE OF DEGREES (NOW MORE IN LINE WITH THE NAM),
AND AS SUCH, HOURLY GRIDS WERE UPDATED AS WELL. ASIDE FROM
ADJUSTMENTS TO THE SKY GRIDS TO FOLLOW IN LINE WITH OBSERVATIONAL
TRENDS ACROSS THE AREA (SUNNY WEST, CLOUDY EAST), NO ADDITIONAL
CHANGES WERE NECESSARY.

WILL SEND UPDATED PRODUCTS SHORTLY.

12

&&

.AVIATION...
FOR 18Z TAFS...
VFR CONDS ARE EXPECTED AT BOTH TAF SITES THROUGH THE PERIOD, WITH
HIGH CLOUDS INCREASING IN COVERAGE AHEAD OF AN APPROACHING UPPER
LEVEL DISTURBANCE. SCT/BKN MID-LEVEL CLOUDS WILL ALSO DEVELOP ACROSS
THE TAF SITES BY THIS TIME TOMORROW. SCATTERED SHOWERS/STORMS WILL
DEVELOP TOWARD THE END OF THE TAF PERIOD AS WELL, THOUGH MUCH OF THE
ACTIVITY WILL BE CONFINED GENERALLY EAST OF KHSV. FOR NOW, WILL NOT
FORMALLY INCLUDE MENTION OF CONVECTION, BUT WILL MONITOR TRENDS AND
REASSESS THIS THREAT WITH THE 00Z TAF ISSUANCE.

12

&&

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

$$

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


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