Area Forecast Discussion
Issued by NWS Huntsville, AL

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS64 KHUN 030836
AFDHUN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HUNTSVILLE AL
336 AM CDT THU SEP 3 2015

.DISCUSSION...

UPPER LEVEL RIDGING REMAINS IN PLACE ACROSS THE CENTRAL
CONUS...WITH A FAIRLY STRONG UPPER TROUGH SITUATED OVER THE WEST
COAST. CLOSER TO THE LOCAL AREA...WEAK UPPER RIDGING WAS
OBSERVED...WITH SEVERAL SHORTWAVES MOVING IN THE WEAK NORTHWEST FLOW
ALOFT. AT THE SURFACE...HIGH PRESSURE WAS OBSERVED ACROSS MUCH OF
THE EASTERN CONUS. TEMPS HAVE NOT COOLED VERY MUCH DUE TO HIGH CLOUD
COVER...WITH MANY LOCATIONS REMAINING IN THE MID 70S.
ADDITIONALLY...LOW LEVEL MOISTURE REMAINS ABUNDANT...LEADING TO
FAIRLY LOW DEWPOINT DEPRESSIONS. THEREFORE...LIGHT FOG WAS BEGINNING
TO DEVELOP IN ISOLATED LOCATIONS ACROSS THE FORECAST AREA. LATEST
SATELLITE IMAGERY SHOWS A CLEARING OF HIGH CLOUDS ACROSS THE
EXTREME NORTHWEST...AND IF THIS TREND CONTINUES TO THE EAST...MORE
WIDESPREAD FOG WILL BE LIKELY. ANY FOG THAT DOES DEVELOP WILL LIFT
QUICKLY AFTER DAYBREAK...AS BOUNDARY LAYER MIXING OCCURS.

THE REMAINDER OF THE DAY WILL BE FAIRLY SIMILAR TO YESTERDAY.
MOISTURE WILL REMAIN HIGH DESPITE WEAK NORTHERLY FLOW. FORECAST PW
VALUES EXCEED 1.6 INCHES THIS AFTERNOON...WHICH IS JUST ABOVE
SEASONAL NORMALS FOR EARLY SEPT. WEAK UPPER LEVEL SHORTWAVES ARE
EXPECTED TO CONTINUE TO TRAVERSE SOUTHEASTWARD THROUGH THE
DAY...WHICH COULD PROVIDE A FOCUS FOR ISOLATED CONVECTION THIS
AFTERNOON. HOWEVER...GIVEN THE WEAK NATURE OF THE LIFT...NOT
EXPECTING ANYTHING WIDESPREAD. POPS WERE INCREASED TO SLIGHT CHANCE.
DEEP LAYER MOISTURE WILL DECREASE ON FRIDAY...AS MID AND UPPER LEVEL
NORTHERLY FLOW INCREASES SLIGHTLY. NOT EXPECTING ENOUGH PRECIP DURING
THE DAY TO INCREASE POPS...AND TEMPS WILL LIKELY WARM INTO THE LOW TO
MID 90S.

THE PATTERN WILL BEGIN TO SHIFT OVERNIGHT FRIDAY AND INTO SATURDAY.
HIGH PRESSURE WILL DEVELOP ALONG THE EAST COAST AND FILTER SOUTHWARD
ALONG THE APPALACHIANS. A WEAK COLD FRONT IS EXPECTED TO DEVELOP AND
PROPAGATE WESTWARD INTO THE FORECAST AREA. WINDS WILL SHIFT TO THE
EAST BY SATURDAY AFTERNOON...BRINGING MOISTURE INTO THE FORECAST
AREA. THEREFORE...SCATTERED THUNDERSTORMS ARE POSSIBLE BY SATURDAY
AFTERNOON AND WILL CONTINUE THROUGH SUNDAY. NOT LOOKING AT A VERY
HIGH CHANCE FOR RAIN GIVEN LITTLE TO NO UPPER LEVEL SUPPORT...AND
WILL MAINTAIN THE POPS IN THE 20 TO 40 PERCENT RANGE.

UPPER LEVEL RIDGING WILL BUILD INTO THE REGION BY THE BEGINNING OF
NEXT WEEK...WITH SURFACE HIGH PRESSURE REMAINING ANCHORED ACROSS THE
SOUTHEAST. LOW LEVEL MOISTURE WILL REMAIN IN PLACE AND ISOLATED
DIURNAL CONVECTION WILL BE POSSIBLE EACH DAY THROUGH WEDNESDAY.
TEMPS WILL HOVER RIGHT AROUND SEASONAL NORMS FOR MUCH OF THE
FORECAST PERIOD. GUIDANCE IS SHOWING A FAIRLY STRONG COLD FRONT
MOVING IN JUST BEYOND THE FORECAST PERIOD...WHICH MAY BRING A DECENT
CHANCE OF RAIN FOR THE END OF THE WORK WEEK.

73

&&

.AVIATION...
/ISSUED 1255 AM CDT THU SEP 3 2015/
FOR 06Z TAFS...LINGERING HIGH CLOUDS ASSOCIATED WITH A WEAK UPPER
DISTURBANCE MOVING EWD ACROSS THE AREA WILL BEGIN TO DIMINISH SOME
HEADING INTO THE MORNING HRS...WITH VFR CONDS PREVAILING. THE
EXCEPTION WILL BE SOME BRIEF/TEMPO -BR/MVFR VIS POSSIBLE DURING THE
EARLY MORNING PERIOD. WINDS ARE XPCTED TO REMAIN PREDOM LIGHT/VAR
WITH SFC HIGH PRESSURE REMAINING FAIRLY STAGNANT ACROSS THE REGION.

09

&&

.PRELIMINARY POINT TEMPS/POPS...
HUNTSVILLE    92  71  93  71 /  20  10  10  10
SHOALS        90  69  92  69 /  20  10  10  10
VINEMONT      88  68  90  69 /  20  10  10  10
FAYETTEVILLE  88  68  90  67 /  20  10  10  10
ALBERTVILLE   88  68  90  68 /  20  10  10  10
FORT PAYNE    88  66  89  67 /  20  10  10  10

&&

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

$$

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


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.