HAMweather.com Area Forecast Discussion for County Warning Area SHV

Thu, 16 Feb 2012 09:07:03 GMT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
948 PM CST WED FEB 15 2012

.DISCUSSION...
EXTREMELY MOIST LOW LEVELS FROM TODAY/S RAINFALL HAS LED TO THE
DEVELOPMENT OF SHALLOW BUT DENSE FOG ACROSS MUCH OF E TX AND
EXTREME NW LA/SW AR. A SECOND AREA OF FOG HAS BEEN MOVING SOUTH
ACROSS ERN OK AND INTO EXTREME NE TX. COLD FRONT WAS MAKING GOOD
PROGRESS EWD EARLIER...SO INITIALLY THOUGHT FOG WOULD BE SHORT-
LIVED. INSTEAD...VISIBILITIES HAVE STEADILY DROPPED AND THE FOG
HAS PERSISTED AND EXPANDED AS THE DRY AIR REMAINS TO THE WEST OF
THE CWA. GIVEN THE ABUNDANCE OF REPORTS OF DENSE FOG THAT HAVE
BEEN RECEIVED...WENT AHEAD ISSUED A DENSE FOG ADVISORY THROUGH
10Z. CONDITIONS SHOULD RAPIDLY IMPROVE AS THE DRY AIR INVADES FROM
WEST TO EAST. IN FACT...THE DRY AIR IS ALREADY KNOCKING ON THE
DOOR OF THE WRN ZONES AS EVIDENCED BY A 0 DEGREE DEWPOINT
DEPRESSION AT KTYR...BUT A 14 DEGREE DEWPOINT DEPRESSION WITH WEST
WINDS AT KTRL.

OTHERWISE...MCS THAT AFFECTED THE CWA EARLIER IN THE DAY HAS MOVED
WELL EAST OF THE AREA. THERE COULD BE A FEW ISOLATED SHWRS OR
DRIZZLE DEVELOP IMMEDIATELY AHEAD OF THE APPROACHING COLD FRONT.
HOWEVER...CONFIDENCE IS LOW SO WENT AHEAD REMOVED POPS FOR THE
REMAINDER OF THE EVENING AND OVERNIGHT HOURS.

UPDATED PRODUCTS HAVE BEEN SENT. /09/

.AVIATION...
CONCERNING THE ARKLATEX...WIDESPREAD VLIFR/IFR/MVFR VSBY AND CIGS 
WILL PERSIST. RAINS HAVE ENDED OVER OUR SE...BUT DENSE FOG IS 
RAMPANT NORTH AND WEST. MANY TERMINALS AWAITING WESTERLY WIND JUST 
TO OUR WEST ATTM ALONG A COLD FRONT THAT WILL MOVE ACROSS THE AREA 
OVERNIGHT...WITH FLIGHT CONDITIONS BECOMING VFR BETWEEN 09Z AND 15Z. 
SURFACE WINDS LIGHT S/SE AROUND 5 KTS GRADUALLY SHIFTING TO 
NORTHWEST BEHIND THE FRONT.  /24/ 

.PRELIMINARY POINT TEMPS/POPS...
SHV  54  69  41  66  48 /  10  10  10  20  60 
MLU  55  68  47  65  46 /  10  10  10  10  60 
DEQ  43  65  37  63  39 /  10  10  10  10  50 
TXK  49  65  42  63  41 /  10  10  10  10  50 
ELD  52  66  40  63  42 /  10  10  10  10  50 
TYR  46  64  41  65  40 /  10  10  10  20  60 
GGG  49  66  41  65  43 /  10  10  10  20  60 
LFK  54  70  49  66  49 /  10  10  20  20  60 

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...DENSE FOG ADVISORY UNTIL 4 AM CST THURSDAY FOR THE FOLLOWING 
     ZONES: ARZ050-059-070.

LA...DENSE FOG ADVISORY UNTIL 4 AM CST THURSDAY FOR THE FOLLOWING 
     ZONES: LAZ001-002-010-011-017-018.

OK...DENSE FOG ADVISORY UNTIL 4 AM CST THURSDAY FOR THE FOLLOWING 
     ZONES: OKZ077.

TX...DENSE FOG ADVISORY UNTIL 4 AM CST THURSDAY FOR THE FOLLOWING 
     ZONES: TXZ096-097-108>112-124>126-136>138-149>153-165>167.