Area Forecast Discussion
Issued by NWS Huntsville, AL

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000
FXUS64 KHUN 221725 AAC
AFDHUN

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1225 PM CDT FRI AUG 22 2014

.UPDATE...
FOR 18Z TAFS

&&

.DISCUSSION...
/ISSUED 944 AM CDT FRI AUG 22 2014/
ANOTHER HOT AND HUMID DAY IS UNDERWAY ACROSS THE TENNESSEE VALLEY.
WITH AN UPPER LEVEL RIDGE PARKED OVER THE TX/LA STATE LINES,
CONVECTION CAN BE SEEN ON VISIBLE/WV IMAGERY ROTATING CLOCKWISE
AROUND THE PERIPHERY OF THIS FEATURE (MOST NOTABLY OVER THE SOUTHERN
GREAT LAKES). CIRRUS CLOUDS FROM THIS CONVECTION ADVECTING TO THE
SOUTH WILL STREAM OVERHEAD THE AREA THROUGH THE AFTERNOON. SFC HIGH
PRESSURE IS LOCATED OVER THE GOLDEN TRIANGLE IN EAST CENTRAL MS, WITH
LIGHT SW TO NW WINDS IN PLACE ACROSS THE REGION.

9AM TEMPERATURES ARE ALREADY IN THE LOWER/MIDDLE 80S IN MANY
LOCATIONS. DEWPOINTS ACROSS THE CWFA ARE EXPECTED TO REMAIN IN THE
LOWER/MIDDLE 70S THROUGH THE AFTERNOON, PRODUCING HEAT INDEX VALUES
AROUND/EXCEEDING 105 DEGREES. AS SUCH, WILL KEEP THE HEAT ADVISORY
GOING. MINOR ADJUSTMENTS WERE MADE TO THE DEWPOINT GRIDS FOR THE
REMAINDER OF THE AFTERNOON, BUT ALL OTHER WX ELEMENTS WERE ON TRACK.
AFTN HIGHS WILL TOP OUT IN THE MID/UPPER 90S, WITH THE WARMEST
TEMPS/HIGHEST HEAT INDEX VALUES OCCURRING OVER NW AL.

UPDATED PRODUCTS WILL BE SENT SHORTLY.

12

&&

.AVIATION...
FOR 18Z TAFS...
VFR CONDS WILL PREVAIL AT BOTH TAF SITES THRU THE PERIOD WITH THE
EXCEPTION OF PATCHY FOG DEVELOPMENT TOMORROW MORNING. AT KMSL, IFR
VSBYS ARE LIKELY AGAIN, AND AT KHSV, ONLY LOWER-END MVFR CONDS ARE
POSSIBLE. ONCE THE FOG DISSIPATES, SCT CLOUDS ARND 4KFT AND 25KFT
WILL LINGER THRU THE END OF THE TAF PERIOD.

12

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...HEAT ADVISORY UNTIL 9 PM CDT SATURDAY FOR ALZ001>010-016.

TN...HEAT ADVISORY UNTIL 9 PM CDT SATURDAY FOR TNZ076-096-097.

&&

$$

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


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