As usual...
Birmingham AFD:
CENTRAL ALABAMA IS CURRENTLY IN THE RIGHT ENTRANCE REGION OF A
STRONG 150KT JET...WITH EVIDENCE OF CLOUD TOP COOLING ON LATEST IR
IMAGERY. THE PROBLEM IS THAT WE ARE MOISTURE STARVED. THE BOUNDARY
LAYER IS VERY DRY...GENERALLY BELOW 800 MB ON 12Z BMX...JAN...AND
LIX SOUNDINGS. AREA RADARS INDICATE GENERALLY LIGHT SHOWERS FROM
JUST EAST OF NEW ORLEANS TO DESTIN. A FEW OBSERVATIONS INLAND HAVE
REPORTED LIGHT RAIN BUT NOTHING MEASURABLE CLOSE TO THE FORECAST
AREA. WITH THE WEAK LOW FORMING WELL OFFSHORE AND NOT STRENGTHENING
TIL IT PASSES WELL EAST...THE ATMOSPHERE WILL HAVE TO SATURATE TOP
DOWN WITH NO GREAT MOISTURE ENHANCER IN THE LOW LEVELS. WITH ALL
THAT SAID...HAVE INCREASED THE GRADIENT OF POPS ACROSS THE AREA.
WILL GO WITH NEAR 100 PERCENT FAR SOUTHEAST AND 10 NORTHWEST.
WILL
REMOVE MENTION OF ANY WINTRY PRECIP AS EVAPORATIONAL COOLING WILL
NOT SUFFICIENTLY COOL THE LAYER AS PRECIP QUICKLY MOVES PAST THE
AREA TO THE EAST BY MIDNIGHT. WOULD NOT BE SURPRISED TO SEE A FLAKE
OR A PELLET...BUT IT WILL BE A FEW AND FAR BETWEEN OCCURRENCE. NAM
AND GFS ARE MUCH CLOSER AND A MIXED SOLUTION GENERALLY FITS THIS
SCENARIO.