Health & Fitness
Flood Watch Posted for North Georgia
Flood Watch in effect from late tonight through Monday morning. Severe weather possibility increases.
UPDATE - 3:23pm Saturday
POTENT UPPER SHORTWAVE TROUGH CURRENTLY SWINGING NEGATIVE NEAR THE ARKLATEX IS PROGGED TO DAMPEN WITH THE ENERGY EJECTING RAPIDLY NEWD AS ITS ABSORBED INTO THE LONG WAVE TROUGH. VERY STRONG SW LOW LEVEL FLOW WILL PUSH INTO THE AREA FROM THE NW TONIGHT... WITH A 60-KT 850MB LLJ PRESENT IN THE 06-12Z PERIOD. THIS WILL BE JUXTAPOSED ALONG THE TRANSLATED SFC FRONT AND AMPLE MOISTURE TRANSPORT OFF THE NORTHERN GULF. PROGGED 0-1KM BULK SHEAR IS NEAR 40 KTS... ALONG WITH AROUND 65 KTS OF DEEP LAYER SHEAR. MODELS HAVE BEEN CONSISTENT WITH 300-500 J/KG OF SBCAPE AHEAD AND ALONG THE FRONT AS WELL. IN SUCH A HIGH SHEAR LOW CAPE ENVIRONMENT... THE LOCAL SHERB VALUES ARE CLOSE TO THE CRITICAL THRESHOLD OF 1.0 IN NORTH AND WEST CENTRAL GEORGIA MAINLY ALONG AND NW OF THE I-85 CORRIDOR IN THE 06-12Z PERIOD TONIGHT. SREF SIG TOR PARAMETER IS ALSO AT 1.0 FOR 09Z IN THE FAR NW PART OF THE STATE. LOCAL WRF SOLUTION HAS BEEN CONSISTENTLY INDICATING A SQUALL LINE ENTERING THE NW AFTER 09Z AND EVENTUALLY HAVING EMBEDDED CONVECTION PROPAGATING EASTWARD INTO THE ATLANTA METRO AREA BY 14Z. SPC UPDATED DAY 1 CONVECTIVE OUTLOOK HAS THE SLIGHT RISK MAINLY JUST NW OF THE ATLANTA AREA...THOUGH THE MODERATE RISK AREA WAS PULLED FARTHER EASTWARD AND ONLY A FEW COUNTIES WEST
OF THE NORTHWESTERN EXTENT OF THE CWA. THE NW IS INCLUDED IN A 2-5
PERCENT TORNADO AREA AND UP TO 30 PERCENT FOR DAMAGING WINDS. ALL IN ALL... THERE IS DECENT CHANCE FOR SEVERE STORMS MAINLY IN THE FAR NORTHWEST IN THE 09-14Z (4am - 9am) PERIOD WITH THE MAIN THREATS BEING STRONG DAMAGING WINDS AND ISOLATED TORNADOES. WILL LIKELY BE DEALING WITH BOWING SEGMENTS AND REFLECTIVITY NOTCHES WITHIN ANY SQUALL LINE OR EMBEDDED CELLS IN SUCH A STRONGLY SHEARED ENVIRONMENT.
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URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE
PEACHTREE CITY GA
1033 AM EST SAT DEC 21 2013
INCLUDING THE CITIES OF... CALHOUN... DAHLONEGA... CLEVELAND... ROME... CARTERSVILLE... GAINESVILLE... MARIETTA... ATLANTA... LAWRENCEVILLE... ATHENS... CARROLLTON... DOUGLASVILLE... EAST POINT... DECATUR... CONYERS... COVINGTON... NEWNAN... PEACHTREE CITY... GRIFFIN... COLUMBUS
1033 AM EST SAT DEC 21 2013
...FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH MONDAY MORNING...
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
- FLOOD WATCH FOR NORTH AND PORTIONS OF CENTRAL GEORGIA...ALONG AND NORTH OF A LINE FROM COLUMBUS TO FORSYTH TO GREENSBORO.
- FROM LATE TONIGHT THROUGH MONDAY MORNING
- A PERIOD OF MODERATE TO HEAVY RAIN OVER THE WATCH AREA WILL CAUSE SIGNIFICANT POTENTIAL FOR RIVER FLOODING INCLUDING SMALLER CREEKS AND STREAMS.
- SOME RIVERS AND CREEKS THAT COULD BE AFFECTED INCLUDE ALPHARETTA AND CUMMING ON THE BIG CREEK...SUWANEE CREEK AND THE OCONEE RIVER AT PENFIELD. THE VAST MAJORITY OF ANY FLOODING SHOULD BE MINOR.
A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON CURRENT FORECASTS.
YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1106 AM EST SAT DEC 21 2013
.UPDATE...
SEVERE THREAT FOR NW GA LATE TONIGHT INTO SUNDAY IS LOOKING TO BE
A BIT FARTHER EAST THAN PREVIOUSLY THOUGHT (closer to us)... AND SPC UPDATED CONVECTIVE OUTLOOK TO HAVE SLIGHT RISK A BIT FARTHER EAST EDGING INTO NW GA. GRAPHICS AND OTHER PRODUCTS ARE BEING UPDATED
ACCORDINGLY. ALSO HAVE ISSUED FLOOD WATCH... BASED ON UPDATED QPF WITH SWATH OF 2-3 INCHES RAINFALL FOR PORTIONS OF THE AREA EXCEPT FOR THE SOUTHEAST THROUGH MONDAY MORNING.
The WPC QPF (Precip) forecast is here.
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