Wind Chill Advisory 4, NWS Omaha, NE

Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Boone County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1139 AM CST TUE JAN 6 2015

.UPDATE...
ISSUED AT 751 AM CST TUE JAN 6 2015

UPDATED TO LET THE WIND CHILL HEADLINE EXPIRE. ADDITIONAL
HEADLINES WILL BE NEEDED TONIGHT AND EARLY WEDNESDAY BASED ON
CURRENT FORECASTS.

&&

.SHORT TERM...(TODAY THROUGH THURSDAY)
ISSUED AT 217 AM CST TUE JAN 6 2015

BEGINNING OF THE ANTICIPATED/UNWELCOMED COLD SPELL IS UNDERWAY.
MSAS DEPICTING LEADING EDGE OF ARCTIC AIR MASS WAS MAKING ITS WAY
THRU THE CWA THIS MORNING WHILE BRUNT OF CAA WAS SURGING SWD THRU
THE DAKOTAS AND UPPER MIDWEST WHERE WIND CHILL INDICES HAVE
DROPPED TO THE -15 TO -25 BELOW ZERO RANGE.

FOR TODAY...BAROCLINIC ZONE PROGGED TO INTENSIFY FROM MT TO THE CNTRL
PLAINS IN RESPONSE TO ARCTIC AIR MASS INVADING THE PLAINS. MODELS IN
GOOD AGREEMENT THAT COMBINATION OF WEAKENING COND PRES DEFICITS AND
STRONG DEEP LYR AGEOSTROPHIC FORCING WILL BE ENOUGH TO INDUCE BAND
OF LIGHT SN ACTIVITY WITHIN THE CWA THIS AFTN. EXPECT SNOW ACTIVITY
WILL BE BRIEF AS THE CAA RAPIDLY DEEPENS AND SHUTS OFF VERTICAL
ASCENT. GIVEN LACK OF MOISTURE ALONG WITH BAROCLINIC ZONE QUICKLY
SHIFTING SOUTH...ACCUMULATION TOTALS THIS EVENING WILL BE ON THE
LIGHT SIDE.

OTHERWISE...GUSTY WINDS WILL FORCE WIND CHILL INDICES TO BOTTOM OUT
IN THE -20 TO -30 BELOW RANGE WED MORNING...AND AROUND 20 BELOW
THUR MORNING.

.LONG TERM...(THURSDAY NIGHT THROUGH MONDAY)
ISSUED AT 217 AM CST TUE JAN 6 2015

WITH A MEAN TROF ADVERTISED OVER THE CONUS...DRY CONDITIONS ALONG
WITH WELL BELOW NORMAL TEMPS WILL BE THE RULE. AS A MATTER OF
FACT...EXPECT SUB ZERO WIND CHILL INDICES DURING THE MORNING HOURS
THRU THE ENTIRE EXTENDED FCST PD.

&&

.AVIATION...(18Z TAFS FOR KOFK...KLNK AND KOMA.)
ISSUED AT 1137 AM CST TUE JAN 6 2015

CONDITIONS SHOULD BE MAINLY VFR THROUGH THE TAF PERIOD.  A WEAK
DISTURBANCE COULD PRODUCE SOME LIGHT SNOW AND TEMPORARILY REDUCE
VISIBILITIES TO MVFR/IFR LEVELS AT EACH SITE...STARTING WITH OFK
AROUND 00Z AND IMPACTING OMA AND LNK SHORTLY AFTER. LIGHT SNOW MAY
LINGER A LITTLE LONGER AT LNK. AN ARCTIC FRONT WILL THEN SWING
ACROSS THE REGION CAUSING NORTHWEST WINDS TO INCREASE AND BECOME
GUSTY THROUGH THE END OF THE PERIOD.

&&

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

UPDATE...ZAPOTOCNY
SHORT TERM...DEE
LONG TERM...DEE
AVIATION...KG

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
430 AM CST TUE JAN 6 2015

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-070030-
MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-
PAGE-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-
STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-BUTLER-
SAUNDERS-DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE-
JEFFERSON-GAGE-JOHNSON-NEMAHA-PAWNEE-RICHARDSON-
430 AM CST TUE JAN 6 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST
NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...TODAY AND TONIGHT

BITTERLY COLD WIND CHILL INDICES RANGING FROM 20 TO 30 BELOW ZERO
ARE EXPECTED LATE TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SUB ZERO WIND CHILL INDICES AREA EXPECTED DURING THE MORNING HOURS
OVER THE MAJORITY OF THE OUTLOOK AREA HEADING INTO THIS WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.