FXUS63 KGID 101129
AFDGID

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
529 AM CST THU DEC 10 2009

.AVIATION...12Z. VFR CONDITIONS ARE FORECAST WITH CLEAR SKIES AND
NO VISIBILITY RESTRICTIONS. WINDS WILL BE AROUND 12KTS DURING THE
DAY AT TIMES BUT WILL DROP OFF AGAIN AT SUNSET.

&&

.PREV DISCUSSION... /ISSUED 326 AM CST THU DEC 10 2009/ 

DISCUSSION...MAIN FOCUS IS ON THE DEGREE OF COLD THAT TEMPERATURES
WILL BE THE NEXT FEW DAYS. AN ARCTIC AIRMASS REMAINED IN PLACE
ACROSS THE CENTRAL PLAINS AND IN GOOD RADIATIONAL CONDITIONS
TEMPERATURES HAVE PLUMMETED BELOW ZERO. WIND CHILL READINGS REMAIN
AT ADVISORY LEVELS AND THE CURRENT WIND CHILL HEADLINE WILL REMAIN
IN EFFECT THIS MORNING.

THE ARCTIC AIRMASS WILL MODERATE SOMEWHAT TODAY AS HEIGHTS GRADUALLY 
RISE AND THE COLDEST AIR LIFTS INTO THE UPPER MIDWEST/GREAT LAKES 
REGION.  H85 TEMPS RISE ABOUT 5-6C OR FROM ROUGHLY -17C TO AROUND 
-11C DURING THE DAY.  WINDS WILL BE FROM A DOWNSLOPE WESTERLY 
DIRECTION BUT THIS WILL ALSO BE OVER SNOWPACK AND TEMPS WILL 
CONTINUE TO STRUGGLE TODAY AND JUST EXPECT HIGHS IN THE TEENS 
DESPITE FULL SUNSHINE.  ONCE DARKNESS FALLS...TEMPERATURES WILL 
QUICKLY DROP IN THE GOOD RADIATIONAL CONDITIONS AND LOWS SHOULD BE 
BELOW ZERO AGAIN.  WIND CHILL READINGS APPEAR THEY WILL JUST FALL 
SHORT OF ADVISORY CRITERIA SO DO NOT PLAN ON ANY NEW HEADLINES 
UNLESS THINGS CHANGE.

THE TREND OF HEIGHTS RISING/TEMPERATURES GRADUALLY MODERATING 
CONTINUES ON FRIDAY AND READINGS SHOULD MAKE A RUN INTO THE LOWER 
20S FOR HIGHS.  MODELS DIVERGE ON THE TIMING OF A MID LEVEL WAVE TO 
AFFECT THE PLAINS OVER THE WEEKEND.  THE GFS IS QUICKER WITH THE 
SYSTEM AND ADVECTS LLVL MOISTURE/STRATUS NORTH AHEAD OF THE WAVE 
FRIDAY NIGHT/EARLY SATURDAY WHEREAS THE NAM IS SLIGHTLY SLOWER WITH 
MORE OF A SATURDAY/SATURDAY EVENING TIMING.  BOTH MODELS PLACE THE 
STRATUS ACROSS OUR SE/SOUTHERN ZONES AND SUGGEST SOME LIGHT PCPN MAY 
DEVELOP.  FORECAST SOUNDINGS INDICATE SATURATED LOWLEVELS WITH DRY 
MID LEVELS SO IF PCPN DOES OCCUR IT WOULD BE MORE OF THE FREEZING 
DRIZZLE TYPE.  AM HESITANT TO JUMP ON THIS JUST YET GIVEN THAT OUR 
CWA IS ON THE EDGE OF THIS AND MODELS ARE NOT CONSISTENT IN TIMING. 
WILL CONTINUE TO MONITOR TRENDS WITH NEW MODEL RUNS. IN THE STILL
MODERATING AIRMASS HIGHS ON SATURDAY SHOULD BE IN THE 20S TO NEAR 30
DEGREES N/S.

&&

.GID WATCHES/WARNINGS/ADVISORIES...
NE...WIND CHILL ADVISORY UNTIL 10 AM CST THIS MORNING FOR NEZ039>041-
     046>049-060>064-072>077-082>087.

KS...WIND CHILL ADVISORY UNTIL 10 AM CST THIS MORNING FOR KSZ005>007-
     017>019.

&&

$$