Freeze Warning 7, NWS New Orleans, LA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
438 AM CST THU DEC 7 2006

.DISCUSSION...
ANOTHER ARCTIC COLD FRONT IS SURGING SOUTH THROUGH THE OZARKS AND
OKLAHOMA WITH TEMPERATURES FALLING INTO THE TEENS IN KS AND MO
WITH BELOW ZERO READINGS IN NORTHERN NE. SURFACE PRESSURES ARE
AS HIGH AS 1046 MB IN SD. THE DEEP UPPER TROUGH DRIVING THIS
ARCTIC AIR SOUTH IS MOVING THROUGH THE GREAT LAKES INTO THE LOWER
MS VALLEY...AND THIS TROUGH WILL CONTINUE EAST TODAY WITH THE COLD
FRONT DRIVING THROUGH THE CENTRAL GULF COAST REGION BY MIDDAY
TODAY.

ONCE AGAIN...THE MAIN CONCERNS WITH THIS WILL BE FREEZING
TEMPERATURES TONIGHT...A HARD FREEZE IN THE SAME AREAS THAT HAD A
HARD FREEZE TUESDAY MORNING. THE DIFFERENCE THIS TIME IS THIS
FREEZE WILL BE WIND DRIVEN...SO IT WILL BE MORE OF A PROBLEM FOR
UNWRAPPED WATER PIPES IN ADDITION TO SENSITIVE VEGETATION AND
OUTDOOR PETS AND LIVESTOCK. THE COLD AND WIND WILL PUSH WIND CHILL
READINGS DOWN TO THE LOWEST LEVELS OF THE SEASON...INTO THE MID
TEENS...JUST BARELY ABOVE OUR LOCAL WIND CHILL ADVISORY CRITERIA
OF 13 DEGREES OR LOWER FOR 2 HOURS OR LONGER. WILL GO WITH A
FREEZE WARNING ACROSS THE FORECAST AREA TONIGHT WITH A HARD FREEZE
EXPECTED NORTH OF A DONALDSONVILLE TO SLIDELL TO MS COAST LINE.
THE SOUTH SHORE WILL BE NEAR FREEZING ALONG THE LAKEFRONT...WITH
COLDER UPPER 20S WEST AND SOUTHWEST OF METRO NEW ORLEANS.

FRIDAY WILL BE COLD WITH THE STRONG HIGH PRESSURE BUILDING OVER
THE AREA. THE WIND WILL DIE OFF FRIDAY NIGHT...BUT THERE MAY BE
SOME HIGH CLOUDS SPREADING IN...MAINLY LATE. WILL HAVE
TEMPERATURES JUST AS COLD FRIDAY NIGHT AS TONIGHT...BUT IT WILL
NOT FEEL AS COLD WITH LESS WIND. VERY LOW DEWPOINT TEMPS IN THE
SINGLE DIGITS SHOULD OFFSET ANY INSULATION FROM HIGH CLOUDS.

A WARMING TREND IS EXPECTED OVER THE WEEKEND AS THE AIRMASS
MODIFIES AND THE SURFACE HIGH BECOMES CENTERED OVER THE ATLANTIC
COAST. A SHORTWAVE TROUGH MOVING ACROSS THE AREA MAY BRING A
SLIGHT CHANCE OF RAIN ON SUNDAY...OTHERWISE IT WILL REMAIN DRY.

NEXT WEEK...THE ECMWF AND GFS INDICATE A POTENT SHORTWAVE TROUGH
WILL MOVE ACROSS THE PLAINS INTO THE MS VALLEY DURING THE TUESDAY
THROUGH WEDNESDAY. HAVE GONE CLOSER THE SLOWER ECMWF SOLUTION.
WILL HAVE BETTER CHANCES OF SHOWERS AND THUNDERSTORMS DURING THE
MONDAY NIGHT THROUGH TUESDAY NIGHT PERIODS.

&&

.MARINE...
STRONG SMALL CRAFT ADVISORY CONDITIONS WILL DEVELOP TODAY WITH
GUSTS ABOVE GALE FORCE EXPECTED OVER THE COASTAL WATERS TONIGHT
AND FRIDAY MORNING. IT WILL STAY BREEZY THROUGH THE WEEKEND.

&&

.FIRE WEATHER...
RELATIVE HUMIDITY READINGS WILL DROP BELOW 20 PERCENT FRIDAY. A
FIRE WEATHER WATCH HAS BEEN ISSUED.

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  58  24  47  22 /  10   0   0   0
BTR  59  25  49  25 /  10   0   0   0
MSY  60  30  47  31 /  10   0   0   0
GPT  62  26  47  25 /  10   0   0   0

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...FREEZE WARNING FROM 2 AM TO 8 AM CST FRIDAY FOR LAZ056-LAZ057-
     LAZ058-LAZ059-LAZ060-LAZ061-LAZ062-LAZ063-LAZ064-LAZ065-
     LAZ066-LAZ067-LAZ068-LAZ069-LAZ070.

     FREEZE WARNING FROM MIDNIGHT TONIGHT TO 8 AM CST FRIDAY FOR
     LAZ034-LAZ035-LAZ036-LAZ037-LAZ038-LAZ039-LAZ040-LAZ046-
     LAZ047-LAZ048-LAZ049-LAZ050.

     FIRE WEATHER WATCH FROM FRIDAY MORNING THROUGH FRIDAY AFTERNOON
     FOR LAZ034-LAZ035-LAZ036-LAZ037-LAZ038-LAZ039-LAZ040-LAZ046-
     LAZ047-LAZ048-LAZ049-LAZ050.

GM...SMALL CRAFT ADVISORY UNTIL 5 PM CST FRIDAY FOR GMZ530-GMZ550-
     GMZ555-GMZ570-GMZ575.

MS...FREEZE WARNING FROM MIDNIGHT TONIGHT TO 8 AM CST FRIDAY FOR
     MSZ068-MSZ069-MSZ070-MSZ071-MSZ077-MSZ080-MSZ081-MSZ082.

     FIRE WEATHER WATCH FROM FRIDAY MORNING THROUGH FRIDAY AFTERNOON
     FOR MSZ068-MSZ069-MSZ070-MSZ071-MSZ077-MSZ080-MSZ081-MSZ082.

GM...SMALL CRAFT ADVISORY UNTIL 5 PM CST FRIDAY FOR GMZ530-GMZ550-
     GMZ555-GMZ570-GMZ575.

&&

22

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