FXUS64 KLCH 091024
AFDLCH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
424 AM CST WED DEC 9 2009
.DISCUSSION...
CURRENTLY...PRE-FRONTAL TROF HAS PUSHED THROUGH ALMOST ALL THE
FORECAST AREA. THIS HAS HELPED CLEAR OUT SKIES AND DISSIPATE MOST
FOG WITH ITS PASSAGE. HOWEVER...A BAND OF LOW CLOUDS AND DENSE FOG
SEEMS TO BE FORMING JUST AHEAD OF MAIN COLD. CANADIAN COLD FRONT WITH
MUCH COLDER AND DRIER AIR HAS REACHED NORTHWEST LOUISIANA TO EAST
CENTRAL TEXAS AND IS MOVING QUICKLY TO THE SOUTHEAST.
IN THE THE NEAR TERM...SOME PATCHY DENSE FOG WILL BE POSSIBLE FOR
A FEW HOURS UNTIL COLD FRONT EXITS THE FORECAST AREA.
THEREFORE...WILL KEEP DENSE FOG ADVISORY GOING THROUGH ABOUT 6 AM.
EXTENDED IT A LITTLE FURTHER TO THE NORTH AS OBSERVATIONS AROUND
VERNON AND BEAUREGARD PARISH ARE AT 1/4SM. KJAS ALSO HAS REACHED
1/4SM...HOWEVER EFFECTS OF FRONT SHOULD BE THERE SOON TO LIFT FOG.
HIGH TEMPERATURE FORECAST WILL BE TRICKY AS HIGHS SHOULD BE
REACHED THIS MORNING RIGHT BEFORE FRONTAL PASSAGE...THEN
TEMPERATURES WILL DROP OR HOLD STEADY FOR THE REMAINDER OF THE DAY.
COLD CONDITIONS SHOULD PREVAIL FOR TONIGHT AS DEW POINTS IN THE
20S OVERTAKE THE REGION AND WINDS DROP OFF. TIME HEIGHTS FROM THE
PROGS SHOW QUITE A BIT OF UPPER LEVEL MOISTURE MOVING ACROSS
DURING THE NIGHT. THIS SHOULD HELP KEEP TEMPERATURES FROM TOTALLY
"BOTTOMING OUT" WITH A LIGHT FREEZE EXPECTED NORTHERN ZONES AND
NEAR FREEZING SOUTH.
RAIN COMES BACK INTO THE FORECAST BY FRIDAY AS NEXT UPPER LEVEL
DISTURBANCES PROVIDES STRONG ISENTROPIC LIFT OVER THE FORECAST
AREA. BEST CHANCE FOR RAIN...WITH EVEN A FEW ELEVATED
THUNDERSTORMS...IS ON FRIDAY NIGHT...WITH RAIN TAPERING OFF DURING
SATURDAY MORNING. AVERAGE RAINFALL AMOUNTS LOOK TO BE BETWEEN 1/2
AND 1 INCH WITH THIS SYSTEM.
SOUTHERLY WINDS WITH A SLIGHT WARMING TREND WILL THEN TAKE PLACE
ON SUNDAY....BEFORE NEXT COLD FRONT MOVES THROUGH THE AREA LATE
MONDAY INTO EARLY TUESDAY.
RUA
&&
.MARINE...
SOME PATCHY DENSE FOG STILL LINGERS OR MAY FORM OVER THE COASTAL
WATERS BEFORE COLD FRONT REACHES THE AREA NEAR DAYBREAK. EXPECT
THIS COLD FRONT WILL MOVE ACROSS THE COASTAL WATERS BY AFTERNOON
WITH STRONG NORTH WINDS DEVELOPING IN ITS WAKE. THEREFORE...A
SMALL CRAFT ADVISORY WILL BE IN EFFECT FOR THE OUTER COASTAL
WATERS THROUGH THURSDAY MORNING...WITH EXERCISE CAUTION FOR THE
NEAR SHORE WATERS. MODERATE TO STRONG NORTHEAST TO EAST WINDS ARE
EXPECTED TO PREVAIL THROUGH THE END OF THE WEEK.
RUA
&&
.PRELIMINARY POINT TEMPS/POPS...
KLCH 61 33 53 40 55 / 0 0 0 20 50
KBPT 59 33 53 42 54 / 0 0 0 20 50
KAEX 55 30 51 34 50 / 0 0 0 10 50
KLFT 64 34 53 39 53 / 0 0 0 20 50
&&
.LCH WATCHES/WARNINGS/ADVISORIES...
LA...DENSE FOG ADVISORY UNTIL 6 AM CST EARLY THIS MORNING FOR THE
FOLLOWING ZONES: ACADIA...BEAUREGARD...CALCASIEU...
CAMERON...IBERIA...JEFFERSON DAVIS...LAFAYETTE...LOWER ST.
MARTIN...ST. MARY...UPPER ST. MARTIN...VERMILION...VERNON.
TX...DENSE FOG ADVISORY UNTIL 6 AM CST EARLY THIS MORNING FOR THE
FOLLOWING ZONES: JEFFERSON...ORANGE.
GM...SMALL CRAFT ADVISORY FROM NOON TODAY TO NOON CST THURSDAY FOR
THE FOLLOWING ZONES: WATERS FROM CAMERON, LA TO HIGH
ISLAND, TX EXTENDING FROM 20 NM TO 60 NM...WATERS FROM
INTRACOASTAL CITY, LA TO CAMERON, LA EXTENDING FROM 20 NM
TO 60 NM...WATERS FROM LOWER ATCHAFALAYA RIVER TO
INTRACOASTAL CITY, LA EXTENDING FROM 20 NM TO 60 NM.
DENSE FOG ADVISORY UNTIL 6 AM CST EARLY THIS MORNING FOR THE
FOLLOWING ZONES: CALCASIEU LAKE...COASTAL WATERS FROM
CAMERON, LA TO HIGH ISLAND, TX OUT 20 NM...COASTAL WATERS
FROM INTRACOASTAL CITY TO CAMERON, LA OUT 20 NM...COASTAL
WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY,
LA OUT 20 NM...SABINE LAKE...VERMILION BAY.
&&
$$
