Alert archive / Nebraska / Winter Storm Warnings in 2006

Winter Storm Warning 3, NWS Omaha, NE

December 20, 20069 counties in Nebraska

NWS Omaha, NE issued this winter storm warning at Dec 20, 2006, 3:58 AM CST for 9 counties in Nebraska. It took effect at Dec 20, 2006, 6:00 PM CST. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 20, 2006, 3:58 AM CST (09:58 UTC)
In effect from
Dec 20, 2006, 6:00 PM CST
Expired
Dec 21, 2006, 3:36 AM CST
In force
10 hr
Issued by
NWS Omaha, NE

Counties Antelope County, NE, Boone County, NE, Cedar County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Stanton County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 134 km from the middle of the area, began a volume at 09:56 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 10.0 hours before the alert went out and 317 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2006-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2006-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 173 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2891 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
173 m²/s²
0-3 km storm-relative helicity
244 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Omaha, NE wrote its last area forecast discussion before this winter storm warning went out at Dec 20, 3:54 AM CST, 4 minutes earlier.

Area forecast discussion, Dec 20, 3:54 AM CST, 4 minutes before
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Hazardous weather outlook, Dec 19, 5:42 PM CST, 10 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
542 PM CST TUE DEC 19 2006

NEZ011-012-016>018-030>032-042-201200-
ANTELOPE-BOONE-CEDAR-KNOX-MADISON-PIERCE-PLATTE-STANTON-WAYNE-
542 PM CST TUE DEC 19 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST NEBRASKA.

.DAY ONE...TONIGHT AND WEDNESDAY

A FREEZING RAIN ADVISORY IS POSTED FROM MIDNIGHT THROUGH 10 AM FOR
AREAS GENERALLY WEST OF A LINE FROM HARTINGTON TO DAVID CITY. RAIN IS
EXPECTED TO ROLL IN FROM THE WEST AND SOUTHWEST AS A STRONG STORM
SYSTEM ENTERS THE PLAINS TONIGHT. TEMPERATURES SHOULD FALL THROUGH
THE EVENING...AND BE BELOW FREEZING BY MIDNIGHT WHEN THE RAIN
ARRIVES. UP TO TWO-TENTHS OF AN INCH OF FREEZING RAIN IS POSSIBLE
BEFORE 10 AM. AT THAT TIME TEMPERATURES SHOULD CREEP ABOVE
FREEZING...BRINGING AND END TO THE FREEZING RAIN. HOWEVER RAIN WILL
CONTINUE THROUGH THE AFTERNOON.

LOW LEVEL TEMPERATURES WILL BE THE KEY TO THIS FREEZING RAIN EVENT.
EXTREMELY DRY SURFACE AIR WILL CAUSE THE INITIAL SURGE OF RAIN TO
EVAPORATE BEFORE HITTING THE GROUND. THIS WILL LIKELY COOL THE
ATMOSPHERE ENOUGH TO PUSH TEMPERATURES BELOW FREEZING. IF
TEMPERATURES DROP WELL BELOW FREEZING...A PROLONGED PERIOD OF
FREEZING RAIN IS POSSIBLE...AND AN UPGRADE TO AN ICE STORM WARNING
MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY NIGHT THROUGH TUESDAY

MORE FREEZING RAIN IS POSSIBLE WEDNESDAY NIGHT...WITH SNOW LIKELY
LATE WEDNESDAY NIGHT AND THURSDAY. TEMPERATURES SHOULD ONCE AGAIN
DIP BELOW FREEZING BEFORE MIDNIGHT WEDNESDAY NIGHT AS OCCASIONAL
RAIN CONTINUES TO FALL. SIGNIFICANT ICE ACCUMULATIONS ARE POSSIBLE.
A CHANGE OVER TO SNOW SHOULD OCCUR LATE WEDNESDAY NIGHT FROM WEST
TO EAST...WITH SNOW ACCUMULATIONS UP TO 3 INCHES POSSIBLE. AGAIN THE
TIMING OF TEMPERATURES FALLING BELOW FREEZING AND THE CHANGEOVER
TO SNOW WILL BE KEY. A WINTER STORM WATCH HAS BEEN ISSUED FOR THE
POSSIBILITY OF FREEZING RAIN AND SNOW WEDNESDAY NIGHT AND THURSDAY
MORNING.

SNOW IS POSSIBLE THROUGH THURSDAY NIGHT AS THE STRONG STORM SYSTEM
FINALLY MOVES TO THE EAST.

THIS STORM SYSTEM WILL PROVIDE THE POTENTIAL FOR A VARIETY OF WINTER
WEATHER ACROSS THE OUTLOOK AREA TONIGHT THROUGH THURSDAY
NIGHT. EXACT TIMING AND LOCATION OF FREEZING RAIN...SNOW AND RAIN
ARE EXTREMELY DIFFICULT TO PREDICT. A COUPLE OF DEGREES OR A FEW
MILES COULD MEAN THE DIFFERENCE BETWEEN A THIN LAYER OF ICE OR SNOW
ON THE ROAD...OR THE ROAD JUST BEING WET. CAUTION IS ADVISED.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR WEDNESDAY...
BUT SPOTTERS ARE ENCOURAGED TO REPORT ANY ICE OR SNOW ACCUMULATIONS.

IAZ043-055-056-069-079-080-090-091-NEZ015-033-034-043>045-050>053-
065>068-078-088>093-201200-
BURT-BUTLER-CASS-COLFAX-CUMING-DODGE-DOUGLAS-FREMONT IA-GAGE-
HARRISON IA-JEFFERSON-JOHNSON-LANCASTER-MILLS IA-MONONA IA-
MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-POTTAWATTAMIE IA-RICHARDSON-
SALINE-SARPY-SAUNDERS-SEWARD-SHELBY IA-THURSTON-WASHINGTON-
542 PM CST TUE DEC 19 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST NEBRASKA.

.DAY ONE...TONIGHT AND WEDNESDAY

A FREEZING RAIN ADVISORY IS POSTED FOR PARTS OF SOUTHEAST NEBRASKA...
MAINLY WEST OF A DAVID CITY TO FAIRBURY LINE...FROM MIDNIGHT TO 10
AM. A TENTH TO TWO-TENTHS OF AN INCH OF ICE ACCUMULATION IS POSSIBLE
IN THESE AREA.  HOWEVER LIGHTER AMOUNTS OF FREEZING RAIN ARE
POSSIBLE AROUND THE MORNING DRIVE TIME ALONG AND WEST OF THE
MISSOURI RIVER. A STRONG STORM SYSTEM WILL PUSH ABUNDANT MOISTURE
NORTH OVERNIGHT...WITH RAIN BEGINNING AROUND FAIRBURY BY MIDNIGHT.
THE RAIN WILL SPREAD NORTHEAST OVERNIGHT...HOWEVER DRY SURFACE AIR
WILL CAUSE MUCH OF THE INITIAL RAINFALL TO EVAPORATE. THIS
EVAPORATION WILL ALSO CAUSE SURFACE TEMPERATURES TO DIP CLOSE TO OR
GO BELOW FREEZING...LEADING TO THE POTENTIAL FOR FREEZING RAIN.
WHILE THE RAIN SHOULD CONTINUE THROUGH THE DAY...TEMPERATURES ARE
EXPECTED TO RISE ABOVE FREEZING WEDNESDAY MID MORNING...BRINGING AN
END TO THE FREEZING RAIN.

.DAYS TWO THROUGH SEVEN...WEDNESDAY NIGHT THROUGH TUESDAY

MORE FREEZING RAIN OR LIGHT SNOW IS POSSIBLE WEDNESDAY NIGHT AFTER
MIDNIGHT...ESPECIALLY IN AREAS TO THE NORTHWEST OF LINCOLN AND
OMAHA.  SOME LIGHT ACCUMULATION OF ICE OR SNOW IS POSSIBLE. A
CHANGEOVER TO A RAIN AND SNOW MIX IS LIKELY DURING THE DAY
THURSDAY...BUT FAR SOUTHEAST NEBRASKA AND SOUTHWEST IOWA WILL MOST
LIKELY SEE JUST RAIN THROUGH THE DAY THURSDAY.

SNOW IS POSSIBLE THROUGH THURSDAY NIGHT AS THE STRONG STORM
SYSTEM FINALLY MOVES TO THE EAST.

THIS STORM SYSTEM WILL PROVIDE THE POTENTIAL FOR A VARIETY OF WINTER
WEATHER ACROSS THE OUTLOOK AREA TONIGHT THROUGH THURSDAY
NIGHT. EXACT TIMING AND LOCATION OF FREEZING RAIN...SNOW AND RAIN
ARE EXTREMELY DIFFICULT TO PREDICT. A COUPLE OF DEGREES OR A FEW
MILES COULD MEAN THE DIFFERENCE BETWEEN A THIN LAYER OF ICE OR SNOW
ON THE ROAD...OR THE ROAD JUST BEING WET. CAUTION IS ADVISED.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR WEDNESDAY...
BUT SPOTTERS ARE ENCOURAGED TO REPORT ANY ICE OR SNOW ACCUMULATIONS.

DERGAN

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 20, 3:58 AM CSTWinter Weather AdvisoryOAXAntelope, Boone, Burt, Cedar, Colfax, Cuming and 8 more26 hr

Nearby

Winter Storm Warnings in Nebraska, 2006Every winter storm warning in 2006

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.