• Atlanta, Georgia, United States (30301)
  • WxZone: GAZ045ICAO: KPDKLat: 33.79NLon: 84.19W

Discussions

440 AM EDT FRI MAR 19 2010

.SHORT TERM /TODAY THROUGH SUNDAY/...
RATHER ZONAL SOUTHERN STREAM JET EXTENDING ROUGHLY BETWEEN 25 AND
30 DEG LATITUDE FROM NORTHERN MEXICO ACROSS THE GULF AND THROUGH
FLORIDA. A SHORTWAVE MID/UPPER TROPOSPHERIC RIDGE WAS TO OUR WEST
THIS MORNING AND WILL BUILD ACROSS GEORGIA TODAY AS A SURFACE HIGH
ALSO SLIDES CROSSES THE SOUTHEASTERN STATES. THE SUBSIDENCE FROM
THIS DEEP LAYER RIDGE WILL KEEP SKIES CLEAR AND TEMPERATURES MILD
AND SLIGHTLY ABOVE CLIMATOLOGICAL AVERAGES TODAY AND SATURDAY. A
NORTHERN STREAM TROUGH DIGGING INTO THE INTERMOUNTAIN WEST TODAY
WILL BUCKLE THE LONGWAVE PATTERN GENERATING A DEEPENING UPPER LOW
AND ASSOCIATED SURFACE LOW OVER THE SOUTHERN PLAINS ON SATURDAY
WHICH MOVES INTO THE MIDDLE MISSISSIPPI VALLEY BY SUNDAY.
SEVERAL LOBES OF VORTICITY ROTATE AROUND THE UPPER LOW INTO GA
UNDERNEATH CONSIDERABLE DIFFLUENCE AHEAD OF APPROACHING H2 JET
STREAK. INSTABILITY MINIMAL (CAPES GENERALLY LESS THAN 200 J/KG)
BUT WITH FAIRLY STRONG DYNAMICS EXPECT SOME THUNDER ON SUNDAY IN
FAIRLY WIDESPREAD RAIN AHEAD OF A COLD FRONT NEARING FROM THE
WEST. PRECIPITATION AMOUNTS TYPICALLY AROUND A HALF INCH AND
POSSIBLY UP TO AN INCH EXPECTED WITH THIS FAIRLY FAST MOVING
SYSTEM.

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
FROPA EXPECTED FROM WEST TO EAST ACROSS GA SUNDAY EVENING WITH
PRECIP WINDING DOWN BY MIDNIGHT MONDAY OVER THE LOCAL AREA. THE LOW
LEVEL COLD POOL ACCOMPANYING THE UPPER LOW AS IT MOVES INTO THE
TENNESSEE VALLEY AND SOUTHERN APPALACHIANS IS QUITE IMPRESSIVE
WITH A BLOB OF H8 TEMPS IN THE -1 TO -7 DEG C RANGE CROSSING THE
AREA TN AND NRN AL/GA MONDAY MORNING. INSTABILITY STRATO
CU/SHOWERS/DRIZZLE LIKELY ON MONDAY. SURFACE TEMPERATURES/WET
BULBS PROBABLY JUST A TAD TOO HIGH FOR ANYTHING BUT COLD
RAIN AT THE SURFACE IN MOST AREAS...BUT GFS THERMAL PROFILES AT
THE HIGHEST ELEVATIONS OF THE NORTH GA MOUNTAINS LOOK SUPPORTIVE
OF A A RAIN/SNOW MIX...GENERALLY ABOVE 3000-3500 FEET. PLAN TO
KEEP ALL RAIN FOR NOW...BUT WILL MONITOR MODEL TRENDS AS THE
NAM/SREF SHOULD COME INTO FOCUS ON THIS BETTER THAN THE GLOBAL
MODELS. LINGERING INFLUENCE OF THE UPPER LOW SLIDING TO OUR EAST
REMAINS THROUGH MONDAY NIGHT...BEFORE HIGH PRESSURE AND A WARMER
AIRMASS BUILDS IN FROM THE WEST TUESDAY THROUGH THURSDAY. THAT
WILL LEAD TO A MID-WEEK RETURN OF ABOVE NORMAL TEMPERATURES AND
DRY CONDITIONS.

RRH
&&

.AVIATION...
NO SIGNIFICANT WX CONCERNS AND VFR CONDITIONS EXPECTED THROUGH 12Z 
SATURDAY. UPPER RIDGE AXIS TO SLIDE ACROSS THE STATE TODAY. AFTER 
AFTER RIDGE AXIS PASSES...HIGH LEVEL CLOUDS ASSOCIATED WITH SYSTEM 
APPROACHING THE PLAINS WILL REMAIN WELL WEST OF THE AREA. COULD SEE 
FEW MID CLOUDS NEAR TOP OF MIXED LAYER THIS AFTERNOON...BUT NOT 
LIKELY. SFC WINDS WILL REMAIN WEST 4-8KTS THROUGH THE PERIOD.

SNELSON

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          75  43  76  51  64 /   0   0   5  10  80 
ATLANTA         70  47  73  51  63 /   0   0   5  20  80 
BLAIRSVILLE     68  39  67  47  59 /   0   0   5  20  80 
CARTERSVILLE    71  39  73  49  62 /   0   0   5  30  80 
COLUMBUS        73  44  74  52  65 /   0   0   5  30  80 
GAINESVILLE     72  46  72  52  61 /   0   0   5  20  80 
MACON           75  42  74  50  67 /   0   0   5  10  80 
ROME            72  40  72  49  62 /   0   0   5  30  80 
PEACHTREE CITY  71  39  73  48  64 /   0   0   5  20  80 
VIDALIA         75  48  77  54  71 /   0   0   5  10  70 

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$
Other Sites