National Weather Service Text Product Display

Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

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000
FXUS63 KOAX 121130
AFDOAX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
530 AM CST THU DEC 12 2013

.AVIATION...

-- Changed Discussion --12Z TAFS FOR KOMA...KLNK...KOFK.

VFR CONDITIONS ARE FORECAST INTO TONIGHT. ONLY SCATTERED MID OR
HIGH CLOUDS ARE EXPECTED TODAY. HIGH LEVEL CLOUDS WILL THICKEN
OVERNIGHT. WINDS SHOULD BE MOSTLY FROM THE SOUTH OR SOUTHWEST AT
12 KNOTS OR LESS.

MILLER-- End Changed Discussion --

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.PREV DISCUSSION... -- Changed Discussion --/ISSUED 300 AM CST THU DEC 12 2013/

DISCUSSION...

SURFACE HIGH PRESSURE HAS MOVED SOUTHEAST OF THE REGION AND IS NOW
CENTERED OVER CENTRAL MISSOURI. AROUND THE BACK SIDE OF THIS
HIGH...STRONG 850 MB WARM AIR ADVECTION IS UNDERWAY OVER OUR
FORECAST AREA. WE SHOULD BEGIN TO MIX OUT LATER THIS MORNING AS
SOUTH/SOUTHWEST WINDS INCREASE BUMPING DAYTIME HIGHS INTO THE
LOWER 40S IN AREAS OF NORTHEAST NEBRASKA WHERE NO SNOW COVER
EXISTS. OTHERWISE...MUCH OF THE FORECAST AREA WITH SNOW ON THE
GROUND SHOULD SEE TEMPS AROUND 30-35.

A CLOSED LOW CURRENTLY MOVING EAST TOWARD SOUTHERN CALIFORNIA WILL
OPEN AND MOVE ACROSS NEW MEXICO BY EARLY FRIDAY. AN INCREASE OF
BROAD LARGE SCALE ASCENT WILL OCCUR AHEAD OF THIS WAVE ACROSS KANSAS
AND MISSOURI FRIDAY MORNING WHERE PCPN SHOULD BECOME WIDESPREAD.
THERE IS A SMALL CHANCE THAT SOME PCPN MAY SPREAD AS FAR NORTH AS
OUR FAR SOUTHEASTERN CWA AND SO HAVE CONTINUED THE SMALL POPS WE
HAVE GOING FOR FRIDAY AFTERNOON AND EVENING. PCPN TYPE MAY BEGIN AS
RAIN WITH A TRANSITION OVER TO A MIX...THEN OVER TO SNOW AS COLD AIR
INTRUSION DROPS SOUTH.

THIS SYSTEM WILL QUICKLY PASS BY AND GO ON TO AFFECT THE
SOUTHEASTERN CONUS. A BROAD UPPER TROUGH WILL KEEP OUR AREA IN
NORTHWESTERLY FLOW AS A RIDGE BUILDS OVER THE WEST COAST. WE HAVE A
DRY FORECAST FROM HERE ON OUT THROUGH WEDNESDAY. THE ARCTIC AIRMASS
WILL REMAIN OVER NORTHERN PORTIONS OF CANADA THROUGH THIS PERIOD AS
WELL ALLOWING OUR REGION A REPRIEVE FROM THE DEEP FREEZE...THROUGH
WEDNESDAY AT LEAST.

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.OAX WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
IA...NONE.
&&

$$

National Weather Service Weather Forecast Office