000
FXUS64 KHUN 201729 AAC
AFDHUN

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1229 PM CDT MON MAY 20 2013

.UPDATE...
FOR 18Z TAFS

&&

.DISCUSSION...
/ISSUED 1005 AM CDT MON MAY 20 2013/
TEMPERATURES ACROSS THE TENNESSEE VALLEY ARE SLOW TO RISE THIS
MORNING THANKS TO THE LOW CLOUD DECK ENCOMPASSING MUCH OF THE AREA.
AS A RESULT, HOURLY TEMPERATURES ARE LAGGING 4-6 DEGREES BELOW WHAT
WAS ORIGINALLY FORECAST. IN ADDITION, MORNING FOG IS FINALLY
DISSIPATING ACROSS PORTIONS OF NORTHEASTERN ALABAMA AND SOUTHERN
MIDDLE TENNESSEE (AND HAS BEEN FORMALLY REMOVED FROM THE FORECAST).
ONCE THE CLOUDS CLEAR BY MIDDAY, TEMPERATURES WILL QUICKLY RESPOND TO
THE INSOLATION, TOPPING OUT IN THE MIDDLE TO UPPER 80S.

WITH UPPER LEVEL RIDGING BUILDING INTO THE REGION FROM THE WEST, A
DRY FORECAST IS EXPECTED TODAY. OTHER THAN CHANGES TO HOURLY GRIDS
AND TWEAKS TO MORNING SKY GRIDS, THE REST OF THE FORECAST HANDLES
BOTH ONGOING/EXPECTED TRENDS FOR TODAY.

WILL RESEND THE ZONES SHORTLY.

12

&&

.AVIATION...
FOR 18Z TAFS...
MVFR CONDITIONS WILL LINGER THRU THE AFTN AS LOW CLOUDS DISSIPATE
FROM WEST TO EAST OVER THE TERMINALS. MOSTLY CLEAR SKIES ARE EXPECTED
AFTER 21/00Z TONIGHT, BUT CLOUDS WILL ONCE AGAIN DEVELOP TOMORROW
AFTN OVER THE AREA. VFR CONDS ARE EXPECTED AFTER 21/00Z TONIGHT,
LINGERING THRU THE END OF THE TAF PERIOD TOMORROW.

12

&&

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

$$

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