Area Forecast Discussion
Issued by NWS Huntsville, AL

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FXUS64 KHUN 150406 AAC
AFDHUN

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1106 PM CDT TUE MAY 14 2013

.UPDATE...
UPDATE TO THE AVIATION SECTION

&&

&&

.AVIATION...
/ISSUED 631 PM CDT TUE MAY 14 2013/
FOR 00Z TAFS...
VFR WEATHER SHOULD CONTINUE THIS PERIOD. SW WINDS IN THE 5-10KT
RANGE TONIGHT ARE EXPECTED TO INCREASE TO 10-20KT BY 15Z. SOME
HIGHER GUSTS ARE POSSIBLE DURING THE MID AFTERNOON PEAK HEATING
HOURS.

IN RECENT TAF UPDATE...ADDED LOW LEVEL WIND SHEAR FOR THE
OVERNIGHT...DUE TO SW WINDS NEARING 50KT 2-3KFT AGL.

RSB

&&

.PREV DISCUSSION...
/ISSUED 919 PM CDT TUE MAY 14 2013/
FINALLY...WARM MAY TEMPERATURES HAVE RETURNED ACROSS THE TENNESSEE
VALLEY. EARLIER HIGHS WARMED TO 86/MUSCLE SHOALS AND 85 IN
HUNTSVILLE. THOSE ARE THE WARMEST READINGS OF THIS MONTH THUS FAR
(HIGHER THAN LOWER 80S ON MAY 9TH). ONLY A BIT MORE THAN A MONTH
AGO...APRIL 17TH WAS THE WARMEST DAY OF THE YEAR...87 AT MUSCLE
SHOALS AND HUNTSVILLE. WE SHOULD NEAR THAT KIND OF WARMTH ACROSS THE
VALLEY TOMORROW. ALTHOUGH IT WAS WARM HERE...DOWNRIGHT HOT WEATHER
AFFECTED PARTS OF THE CENTRAL AND NORTHERN PLAINS...WITH PLUS 100
DEGREE READINGS OCCURRING EARLIER FROM KANSAS TO SOUTHERN MINNESOTA.

A GENERALLY SPLIT FLOW PATTERN WAS IN PLACE ACROSS THE GREATER
CONUS...WITH THE POLAR JET MOVING WEST-EAST JUST SOUTH OF THE US/
CANADA BORDER...AND A SUBTROPICAL FLOW FROM SOUTH OF THE BAJA TO THE
BAHAMAS. CLOUDS AND CONVECTION FROM THE NORTHERN STREAM...AND AROUND
AN UPPER LOW OVER WEST TEXAS SHOULD REMAIN WELL TO THE WEST OF THIS
AREA THROUGH THE OVERNIGHT. OUTPUT FROM THE 18Z MODELS...AS WELL AS
NEW OUTPUT FROM THE NEW NAM INDICATED ONLY SLOW COOLING IN THE LOWER
ATMOSPHERE...SO OPTED TO RAISE LOWS A COUPLE OF DEGREES. WITH CLOUD
COVER ABSENT REGIONALLY...HAVE OPTED FOR CLEAR VS MOSTLY CLEAR FOR
THE OVERNIGHT. MOST OF THOSE UPDATES HAVE BEEN ALREADY SENT.

RSB

&&

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

$$

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AT WEATHER.GOV/HUNTSVILLE.
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