NATIONAL WEATHER SERVICE NEW ORLEANS LA
310 PM CDT THU APR 5 2007
.SHORT TERM...
A RIDGE OF SURFACE HIGH PRESSURE WILL BUILD INTO THE SOUTHERN
PLAINS/LOWER MISSISSIPPI VALLEY OVER THE NEXT FEW DAYS WITH
NORTHWEST FLOW CONTINUING ALOFT. STRONG WINDS WILL CONTINUE OVER
THE COASTAL WATERS THROUGH TOMORROW MORNING.
.LONG TERM...
THE MAIN CONCERN WILL BE THE PRECIP THIS WEEKEND. SATURDAY MORNING
A SHORTWAVE WILL BE MOVING EASTWARD FROM NORTHERN MEXICO AS A
TROUGH MOVES SOUTH ACROSS THE PLAINS STATES/MISSISSIPPI
VALLEY...WRAPPING AROUND THE UPPER LOW OVER THE NORTHEASTERN
STATES. PRECIP SHOULD BE DEVELOPING ACROSS THE SOUTHERN PLAINS.
THEN BY SATURDAY NIGHT THE SHORTWAVE OVER TEXAS WILL BE MOVING
EASTWARD...JUST AHEAD OF THE TROUGH OVER THE CENTRAL PLAINS/MID-
MISSISSIPPI VALLEY. PRECIP WILL BE SPREADING INTO LOUISIANA AND
THE ADJACENT COASTAL WATERS. LATE SATURDAY NIGHT/EARLY SUNDAY
MORNING COULD BE INTERESTING IN OUR AREA. SURFACE TEMPS COULD
FALL TO NEAR OR BELOW FREEZING SUNDAY MORNING. MODEL SOUNDINGS
HAVE MUCH OF THE ATMOSPHERE BELOW FREEZING AT 06Z AND 12Z...WITH
A SLIGHT RISE ABOVE FREEZING BETWEEN 750-825HPA AND AGAIN BELOW
ABOUT 950HPA TOWARD SOUTHWEST MISSISSIPPI. THIS WOULD LEAD TO A
CHANCE FOR SLEET IN THE AREA. HOWEVER...CONFIDENCE IS NOT HIGH YET
THAT THE ATMOSPHERIC COLUMN WILL COOL THAT FAR...SURFACE TEMPS
WILL FALL BELOW FREEZING...AND THERE WILL BE AMPLE MOISTURE TO
PRECIPITATE THAT FAR NORTH OF THE SURFACE LOW/TROUGH OVER THE
GULF. FOR NOW THE FORECAST IS LIGHT RAIN WITH TEMPS FALLING TO
JUST ABOVE FREEZING ACROSS SOUTHWEST/SOUTH-CENTRAL MISSISSIPPI
AND EAST-CENTRAL LOUISIANA. WINDS SHOULD ALSO BE STRONG WITH THIS
SYSTEM...LEADING TO SMALL CRAFT ADVISORY CONDITIONS AGAIN FRIDAY
NIGHT THROUGH EARLY MONDAY.
