Dense Fog Advisory 21, NWS Columbia, SC

650 
WWUS72 KCAE 081528
NPWCAE

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE COLUMBIA SC
1028 AM EST SAT DEC 8 2012


SCZ015-016-018-020>022-025>031-036>038-081630-
/O.CAN.KCAE.FG.Y.0021.000000T0000Z-121208T1600Z/
LANCASTER-CHESTERFIELD-MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-
EDGEFIELD-SALUDA-LEXINGTON-RICHLAND-LEE-AIKEN-SUMTER-ORANGEBURG-
CALHOUN-CLARENDON-
INCLUDING THE CITIES OF...LANCASTER...ELGIN...CHERAW...PAGELAND...
MCCORMICK...NEWBERRY...WINNSBORO...CAMDEN...LUGOFF...EDGEFIELD...
JOHNSTON...SALUDA...RIDGE SPRING...WEST COLUMBIA...CAYCE...
LEXINGTON...RED BANK...COLUMBIA...BISHOPVILLE...
SAVANNAH RIVER SITE...AIKEN...NORTH AUGUSTA...SUMTER...
ORANGEBURG...ST. MATTHEWS...MANNING...SUMMERTON
1028 AM EST SAT DEC 8 2012

...DENSE FOG ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS CANCELLED THE DENSE
FOG ADVISORY. 

THE DENSE FOG HAS DISSIPATED ACROSS THE REGION.

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
1248 AM EST SAT DEC 8 2012

.SYNOPSIS...
A WEAK WEDGE OF HIGH PRESSURE WILL GRADUALLY ERODE INTO
SATURDAY...WITH FAIR AND WARM CONDITIONS EXPECTED OVER THE
WEEKEND. A SLOW MOVING FRONTAL BOUNDARY WILL PROVIDE A CHANCE OF
PRECIPITATION NEXT WEEK.

&&

.NEAR TERM /OVERNIGHT/...
WEAK WEDGE OF HIGH PRESSURE AT THE SURFACE REMAINS IN PLACE. WEAK
WAVE OF LOW PRESSURE OFFSHORE...ALONG WITH A WEAK UPPER IMPULSE.
GUIDANCE IS INDICATING ADDITIONAL CLOUDINESS/FOG FORMING AS TIME
SECTIONS SHOW ABUNDANT LOW LEVEL MOISTURE AND LIGHT BOUNDARY LAYER
WINDS. EXPECT TEMPERATURES TO FALL INTO THE MIDDLE TO UPPER 40S BY
MORNING AND EXPECT WIDESPREAD LOW CLOUDS AND FOG. IT WILL LIKELY
TAKE UNTIL MID/LATE MORNING FOR THE LOW CLOUDS/FOG TO DISSIPATE.

&&

.SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/...
WAVE OF LOW PRESSURE OFFSHORE WILL MOVE TO OUR NE...LEAVING IN
ITS WAKE WEAK HIGH PRESSURE CENTER OVER OUR FORECAST AREA
SATURDAY. MORNING FOG AND LOW CLOUDINESS WILL BE SLOW TO
ERODE...BUT WILL EXPECT GRADUAL CLEARING BY AFTERNOON. SW FLOW
ALOFT ALONG WITH SOME INSOLATION TO PROVIDE WARM TEMPS THROUGH
SUNDAY. A WEAK UPPER IMPULSE AND SOME LOW LEVEL MOISTURE FLUX MAY
PROVIDE A SLIGHT CHANCE OF SHOWERS SUNDAY.

&&

.LONG TERM /MONDAY THROUGH FRIDAY/...
LITTLE CHANCE TO THE LONG TERM THINKING.  MODELS CONTINUE TREND OF
SLOWING DOWN THE APPROACH OF THE NEXT FRONTAL BOUNDARY. MAINTAINED
MENTION OF CHANCE SHOWERS...WITH SLIGHT CHANCE THUNDER...LATE
MONDAY INTO TUE. WITH A SW FLOW ALOFT...PARALLEL TO THE
FRONT...THE FRONT WILL BE SLOW TO MOVE THROUGH AND MAY STALL OVER
OR NEAR THE REGION NEXT WEEK. CONTINUED TO ACCEPT HPC
GUIDANCE...GENERALLY INDICATING SLIGHT CHANCE TO CHANCE POPS
THROUGH MUCH OF THE REMAINDER OF THE FORECAST PERIOD.

&&

.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/...
PLENTY OF LOW-LEVEL AND SURFACE MOISTURE REMAINS OVER THE REGION.
LOW CLOUDS AND FOG ARE SITUATED ACROSS THE MIDLANDS...WITH
ADDITIONAL LOW CLOUDS FURTHER EAST AND NORTH. SOME CLEARING HAS
OCCURRED ACROSS THE CSRA...WITH THIN CIRRUS MOVING OVER THAT AREA.
VISIBILITIES ACROSS THE CSRA ARE FORECAST TO DROP OVERNIGHT WITH
GOOD RADIATIONAL COOLING.

EXPECT LIFR FOG/STRATUS TO DEVELOP OVERNIGHT. IFR/LIFR CONDITIONS
AT CAE/CUB TO CONTINUE OVERNIGHT. CONDITIONS AT OGB EXPECTED TO
DETERIORATE TO LIFR BY 08Z...GIVEN THE HIGH RELATIVE HUMIDITY
BELOW 1000 FT AND LIGHT NORTHERLY WIND. IFR CONDITIONS WILL OCCUR
OVERNIGHT AT AGS/DNL...WITH LIFR AT TIMES BY MORNING.

EXPECT VFR CONDITIONS TO RETURN BY MID-MORNING TO MIDDAY AS
WEDGE BREAKS AND BOUNDARY LAYER MIXING DEVELOPS.

EXTENDED AVIATION OUTLOOK...HIGH LOW-LEVEL MOISTURE MAY RESULT IN
WIDESPREAD MVFR OR IFR CONDITIONS MAINLY DURING THE EARLY MORNING
HOURS SUNDAY AND MONDAY. FURTHER RESTRICTIONS MAY OCCUR IN SHOWERS
ASSOCIATED WITH A COLD FRONT MONDAY INTO WEDNESDAY.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...NONE.
GA...NONE.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
319 AM EST FRI DEC 7 2012

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-080830-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
319 AM EST FRI DEC 7 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND
CENTRAL SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
1151 PM EST FRI DEC 7 2012

SCZ015-020>022-026>028-030-037-080700-
LANCASTER-NEWBERRY-FAIRFIELD-KERSHAW-SALUDA-LEXINGTON-RICHLAND-
AIKEN-CALHOUN-
INCLUDING THE CITIES OF...LANCASTER...ELGIN...NEWBERRY...
WINNSBORO...CAMDEN...LUGOFF...SALUDA...RIDGE SPRING...
WEST COLUMBIA...CAYCE...LEXINGTON...RED BANK...COLUMBIA...
SAVANNAH RIVER SITE...AIKEN...NORTH AUGUSTA...ST. MATTHEWS
1151 PM EST FRI DEC 7 2012

...PATCHY DENSE FOG AFFECTING PARTS OF THE MIDLANDS...

AREAS OF FOG HAVE DEVELOPED ACROSS PARTS OF THE MIDLANDS WITH
VISIBILITIES BELOW A MILE. THERE ARE POCKETS OF DENSE FOG WITH
VISIBILITIES AT OR BELOW A QUARTER OF A MILE IN LOCATIONS
INCLUDING LANCASTER AND AIKEN. MOTORISTS ARE URGED TO SLOW DOWN
AND USE CAUTION WHILE DRIVING. MORE WIDESPREAD DENSE FOG IS
POSSIBLE LATER THIS MORNING.

HC