FXUS63 KOAX 210900
AFDOAX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
300 AM CST TUE DEC 21 2010
.DISCUSSION...
MAIN FORECAST CONCERN WILL BE SYSTEM THAT MODELS BRING INTO THE
AREA ON THURSDAY.
A COLD FRONT WAS MOVING THROUGH THE AREA AT 07Z AND WILL CONTINUE
TO PUSH TO THE SOUTHEAST TODAY AS HIGH PRESSURE BUILDS INTO THE
PLAINS REGION THROUGH WEDNESDAY. UPPER WAVE THEN LIFTS TOWARD THE
SOUTHERN ROCKIES ON WEDNESDAY NIGHT AND INTO THE WESTERN HIGH
PLAINS ON THURSDAY. WARM ADVECTION WING DEVELOPS IN ADVANCE OF THE
WAVE OVER THE NORTHERN PLAINS WEDNESDAY NIGHT INTO THURSDAY. ONLY
MINOR CHANGES AT THIS TIME REGARDING POPS DURING THIS PERIOD DUE
TO UNCERTAINTY IN TIMING BETWEEN THE MODELS. ONE TREND NOTED IN
THIS RUN IS FOR PRIMARY SNOW BAND TO BE LOCATED ACROSS NORTHERN
PARTS OF THE AREA IN THE GFS...NAM AND ECMWF...WITH THE GFS THE
FASTER OF THE MODELS IN BRINGING THE WAVE INTO THE SOUTHERN PLAINS.
TEMPERATURES STAY ON THE COLD SIDE THROUGH THE SHORT TERM WITH
NEAR STEADY OR ONLY SLIGHT RISE FOR TODAY.
EXTENDED PERIOD LOOKS COLD BUT FAIRLY QUIET WEATHER WISE FOR THE
CENTRAL PART OF THE COUNTRY. MORE INTERESTING WEATHER SCENE FOR
THE EAST COAST FOR THE CHRISTMAS WEEKEND.
&&
.AVIATION...
TAF SITES KOFK/KOMA/KLNK
06Z TAFS
BAND OF LOW CLOUDS MOVING THROUGH THE AREA WILL HAVE SOME AFFECT
INTO MID MORNING. THERE ARE ALSO SOME AREAS OF FOG...WITH VSBYS
MAINLY ABOVE 3 MILES. AFTER LOW CLOUDS CLEAR...WE SHOULD SEE AT
LEAST A PERIOD OF MID LEVEL CEILINGS FROM MID MORNING INTO THE
AFTN. NAM INDICATES POTENTIAL FOR LOW CLOUDS MOVING BACK IN AT
KOFK TOWARD 21Z WITH INCREASING 925 MB RH. WE COULD ALSO SEE LOW
CLOUDS A LITTLE MORE EXTENSIVE AT ALL THREE SITES TONIGHT.
&&
.OAX WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
IA...NONE.
&&
$$
FOBERT/MILLER