A fast moving upper level system moved from the southwestern United States across the plains tapping gulf moisture as it moved near eastern Nebraska and southwest Iowa. the moisture and forcing from the system produced freezing rain and sleet over southeast and east central Nebraska and southwest Iowa and heavy snow over northeast Nebraska and west central Iowa.
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS OAX wrote it up.
A fast moving upper level system moved from the southwestern United States across the plains tapping gulf moisture as it moved near eastern Nebraska and southwest Iowa. With Arctic air in place across the area...the moisture and forcing from the system produced freezing rain and sleet over southeast and east central Nebraska and southwest Iowa and heavy snow over northeast Nebraska and west central Iowa. Freezing rain accumulations of 1/4 to 1/3 inch were common from far southeast Nebraska into far southwest Iowa, with 1/2 to 3/4 inch sleet mixed with freezing rain accumulations common just north of there including the Lincoln and Omaha/Council Bluffs areas. Farther north and northwest the precipitation was mostly snow...although some sleet also fell.
The local office's own words before the first event, 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 the first event at Dec 18, 3:07 PM CST, 2 hours 53 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
307 PM CST THU DEC 18 2008
.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT.
BIGGEST CONCERNS ARE PCPN TYPE AND PCPN AMOUNT. MODELS CAME INTO A BIT
BETTER AGREEMENT THIS MORNING. VARIOUS WINTER FORECASTING METHODS WERE
EXAMINED...EVEN SOME OF THE OLD SCHOOL STUFF. COOK METHOD HAD 200 MB
TEMPERATURE DIFFERENCE OF 12 DEGREES C. 500 MB HEIGHT FALL CENTER IS
EXPECTED TO TRACK FROM SERN CO AT 00Z TO NERN MO BY 12Z FRIDAY. QUITE
INTERESTING THAT THE HEIGHT FALL CENTER IS ACTUALLY FORECAST TO
STRENGTHEN AS IT TRACKS ACROSS KS AND MO. GARCIA TECHNIQUE SHOWED MID
LEVEL MIXING RATIOS UP TO AROUND 4 G/KG. A BAND OF FRONTOGENETICAL
FORCING AND POTENTIAL FOR SLANTWISE CONVECTION COULD CAUSE A STREAK
OF ENHANCED PCPN. DECIDED TO MAKE NO CHANGES TO THE HIGHLIGHTS THAT
WE ISSUED EARLIER. WILL TWEAK SNOW AMOUNTS A BIT. SNOW AMOUNTS ARE A
TOUGH CALL SINCE THERE WILL BE SOME SLEET AS WELL...BUT SOMEWHERE IN
THE LOCAL AREA AN 8 INCH SNOW REPORT OR HIGHER MAY OCCUR. THIS WOULD
MOST LIKELY BE NORTH OF LINCOLN AND NORTHWEST OR NORTH OF OMAHA.
LATEST WATER VAPOR SATELLITE LOOP SHOWED SYSTEM LOCATED OVER CO AT
MID AFTN. THIS WILL MOVE QUICKLY EWD ACROSS THE AREA. IT APPEARS THAT
PCPN WILL RAPIDLY DEVELOP AND INTENSIFY OVER THE CENTRAL PLAINS AFTER
O0Z. CROSS SECTIONS FROM THE NAM12 FROM 12Z SHOWED OMEGA VALUES UP TO
50 MICROBARS PER SECOND. 18Z RUN WAS NOT QUITE AS IMPRESSIVE...BUT IT
HAD A COUPLE OF POCKETS OF OMEGA GREATER THAN 20 MICROBARS PER SECOND.
EXPECT SYSTEM TO START MOVING OUT OF THE AREA BY AROUND 09Z BUT FOR
SURE BY 12Z. OVERNIGHT SHIFT SHOULD BE ABLE TO REMOVE HEADLINES WITH
4 AM FORECAST PACKAGE. EXTENDED WARNING AND ADVISORY PRODUCTS BY 1
HOUR...MAINLY TO HAVE THEM EXPIRE WITH THE NEXT FORECAST PACKAGE
ISSUANCE. BUMPED UP LOWS A BIT FROM PREVIOUS...BUT NOT A LOT.
FRIDAY SHOULD BE DRY. NORTH OR NORTHWEST WINDS WILL DROP OFF DURING
THE DAY AS HIGH PRESSURE BUILDS IN. WENT WITH LOWS NEAR 20 OR LOWER
20S NORTH AND MID OR UPPER 20S SOUTH. TEMPERATURES FRIDAY NIGHT WILL
BE TRICKY DEPENDING ON HOW FAST CLOUDS INCREASE AHEAD OF THE NEXT
SYSTEM. LEFT A SMALL CHANCE OF SNOW IN PARTS OF NERN NE LATE AS THE
NEXT SYSTEM PLOWS ACROSS THE DAKOTAS.
.LONG TERM...SATURDAY THROUGH CHRISTMAS DAY.
MAIN FORECAST CONCERNS ARE IN CHANCE OF SNOW SATURDAY...FOLLOWED BY
ARCTIC SURGE OVER THE WEEKEND AND CONTINUED ACTIVE PATTERN INTO NEXT
WEEK. UPPER LOW CURRENTLY OFF THE NW PAC COAST WILL DROP INTO THE
NRN PLAINS BY 12Z SAT...DRAGGING A COLD FRONT THROUGH THE AREA.
MAIN THRUST OF SNOW WILL BE IN DAKOTAS/MN...BUT CWA WILL BE ON THE
FRINGE OF PRECIP AS WEAKER BUT STILL FAVORABLE Q-VECTOR CONVERGENCE
AND UPPER-LEVEL PV ADVECTION OVERSPREAD THE AREA SAT. BEST FORCING
WILL BE ALONG/BEHIND THE INVERTED TROF WELL N OF THE AREA...BUT
ENOUGH FORCING EXISTS TO PRODUCE SOME ACCUMULATING SNOW IN THE
AREA. COLD TEMPS/HIGH SNOW-LIQUID RATIO WILL ALLOW 1-2 INCHES IN
THE NRN CWA CLOSER TO THE LOW...WITH DUSTING TO 1 INCH EXPECTED
ELSEWHERE. BIGGER STORY WILL BE WINDS AS STRONG PRESSURE GRADIENT
AND TROP FOLD ALLOW STRONG NWLY WINDS TO MOVE INTO THE AREA THROUGH
SUN MRNG. WINDS MAY CREATE BLOWING SNOW CONDITIONS /MAINLY IN THE
NRN CWA/...ESPECIALLY IF PRECIP TONIGHT IS MOSTLY SNOW...AND WILL
CERTAINLY CREATE WIND CHILL ADVISORY/WARNING CONDITIONS ACROSS THE
AREA. TOO EARLY YET FOR WIND CHILL WATCH OR OTHER HEADLINES...BUT
WILL CONTINUE TO WATCH AS TIMING NEARS.
COLD AIR ADVECTION WILL CONTINUE ON SUN...LIKELY PREVENTING MUCH OF
A WARM-UP. HAVE DROPPED MAX TEMPS AGAIN...AND MAY STILL NOT BE COLD
ENOUGH. SUN NT CONTINUES TO LOOK COLDEST OF THE PERIOD AS HIGH
PRESSURE MOVES OVERHEAD. FRESH SNOW BOTH TNGT AND SAT MAY HELP
TEMPS DROP EVEN FURTHER...AND BELIEVE CURRENT MIN TEMP FCST IS STILL
NOT COLD ENOUGH. WEAK WARM AIR ADVECTION WILL BEGIN ON SUN AND
CONTINUE INTO MON...BRINGING TEMPS OUT OF THEIR ARCTIC READINGS INTO
MON. ANOTHER UPPER WAVE IS PROGGED TO MOVE ACROSS THE NRN PLAINS ON
MON NT/TUES AS AN UPPER LOW IN THE PAC NW OPENS UP AND DIVES THROUGH
NWLY FLOW. MODELS HAVE SOME DISCREPANCY WITH THE IMPACT OF THIS
WAVE IN THIS AREA...WITH GFS GENERATING QUITE A BIT MORE PRECIP THAN
THE ECMWF. SOME CONCERN WITH MOISTURE FOR THIS SYSTEM AS WELL AS
ITS WEAKENING NATURE AS IT MOVES ACROSS...AND CONTINUED TO HOLD POPS
IN THE SCHC CATEGORY...LEANING MORE TOWARD ECMWF SOLUTION.
HIGH PRESSURE IS AGAIN PROGGED TO MOVE THROUGH ON WED MRNG...WITH
MIN TEMPS CHRISTMAS EVE LIKELY ON THE COLD SIDE AGAIN. SOME TEMP
RECOVERY IS PROGGED FOR WED AND PARTICULARLY THURS. MODELS INDICATE
RATHER STRONG 850MB WARMING ON CHRISTMAS DAY...BUT HAVE RESERVATIONS
ABOUT HOW MUCH OF THAT WARMING WILL BE REALIZED AT THE GROUND GIVEN
SNOWPACK AND POTENTIAL FOR ANOTHER WEAK COLD FRONT THURS NT/FRI.
STILL...LOOKS LIKE TEMPS ON CHRISTMAS WILL MODERATE CLOSER TO
CLIMO. FORECAST CONTINUES TO LOOK DRY FOR THE HOLIDAY.
&&
.AVIATION...
FOR TAF SITES KOFK/KOMA/KLNK THROUGH 19/18Z.
IFR CONDITIONS EXPECTED TO BECOME DOMINANT BY 00Z WITH
A MIX OF WINTER PRECIPITATION THROUGH 06Z BEFORE CHANGING TO ALL
SNOW BEFORE ENDING BY 12Z. MVFR CONDITIONS DEVELOPING AFTER 12Z AT
ALL 3 SITES.
&&
.OAX WATCHES/WARNINGS/ADVISORIES...
NE...WINTER STORM WARNING UNTIL 4 AM CST FRIDAY FOR NEZ015-033-034-
042>045-050>053-065>067-078.
ICE STORM WARNING UNTIL 4 AM CST FRIDAY FOR NEZ068-088>093.
WINTER WEATHER ADVISORY UNTIL 4 AM CST FRIDAY FOR NEZ018-030>032.
IA...WINTER STORM WARNING UNTIL 4 AM CST FRIDAY FOR IAZ043-055-056-
069.
ICE STORM WARNING UNTIL 4 AM CST FRIDAY FOR IAZ079-080-090-091.
&&
SHORT TERM...MILLER
LONG TERM...MAYES
AVIATION...FOBERTHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 436 PM CST THU DEC 18 2008 IAZ079-080-090-091-NEZ068-088>093-191200- FREMONT IA-GAGE-JEFFERSON-JOHNSON-MILLS IA-MONTGOMERY IA-NEMAHA-OTOE- PAGE IA-PAWNEE-RICHARDSON- 436 PM CST THU DEC 18 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA AND SOUTHEAST NEBRASKA. .DAY ONE...TONIGHT AND FRIDAY. AN ICE STORM WARNING IS IN EFFECT THROUGH 4 AM CST. FREEZING RAIN SHOULD CONTINUE THROUGH THE EVENING HOURS. ACCUMULATIONS MAY BE HEAVY AT TIMES. ICE ACCUMULATIONS FROM A QUARTER TO HALF INCH ARE POSSIBLE. THE FREEZING RAIN IS EXPECTED TO MIX WITH SLEET AND MAY CHANGE TO LIGHT SNOW BEFORE ENDING AFTER 3 AM. SOME THUNDER AND LIGHTNING IS ALSO POSSIBLE UNTIL AROUND MIDNIGHT. ROADS...POWERLINES...AND TREES ARE LIKELY TO BECOME ICE COVERED. SOME POWER OUTAGES ARE LIKELY AND TRAVEL COULD BECOME EXTREMELY HAZARDOUS. .DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH CHRISTMAS DAY. COLD ARCTIC AIR IS FORECAST TO BLAST INTO THE REGION SATURDAY... ALONG WITH A CHANCE OF LIGHT SNOW. WIND CHILLS FROM SATURDAY NIGHT THROUGH SUNDAY COULD BE WELL BELOW ZERO. LISTEN FOR LATER FORECASTS REGARDING THE WEEKEND SYSTEM. TEMPERATURES SHOULD REMAIN BELOW NORMAL THROUGH THE MID PART OF NEXT WEEK. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR THURSDAY... BUT REPORTS OF ACCUMULATING ICE WILL BE APPRECIATED. IAZ043-055-056-069-NEZ015-033-034-042>045-050>053-065>067-078-191200- BURT-BUTLER-CASS-COLFAX-CUMING-DODGE-DOUGLAS-HARRISON IA-LANCASTER- MONONA IA-PLATTE-POTTAWATTAMIE IA-SALINE-SARPY-SAUNDERS-SEWARD- SHELBY IA-THURSTON-WASHINGTON- 436 PM CST THU DEC 18 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NEBRASKA AND SOUTHWEST IOWA. .DAY ONE...TONIGHT AND FRIDAY. A WINTER STORM WARNING IS IN EFFECT UNTIL 4 AM CST. A MIXTURE OF SLEET...FREEZING RAIN AND SNOW IS EXPECTED TO DEVELOP. SOME THUNDER AND LIGHTNING MAY OCCUR WITH THE PRECIPITATION. EXACT SNOW AND SLEET ACCUMULATIONS WILL VARY...BECAUSE OF THE MIXED PRECIPITATION. IT SHOULD CHANGE TO MOSTLY SNOW BY MID TO LATE EVENING ALONG AND NORTH OF INTERSTATE 80...INCLUDING THE OMAHA AND LINCOLN AREAS. SEVERAL INCHES OF SNOW...POSSIBLY 3 TO 7 INCHES...MAY ACCUMULATE BY THE TIME THE SNOW ENDS LATE TONIGHT. AN ICE STORM WARNING IS IN EFFECT FARTHER SOUTH OVER THE SOUTHERN PARTS OF SOUTHEAST NEBRASKA AND THE SOUTHWEST CORNER OF IOWA. ROADS...POWERLINES...AND TREES COULD RECEIVE SOME ICE ACCUMULATION BEFORE THE PRECIPITATION CHANGES TO SNOW. .DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH CHRISTMAS DAY. COLD ARCTIC AIR IS FORECAST TO BLAST INTO THE REGION SATURDAY... ALONG WITH SOME LIGHT SNOW. WIND CHILLS FROM SATURDAY NIGHT THROUGH SUNDAY SHOULD BE WELL BELOW ZERO. LISTEN FOR LATER FORECASTS REGARDING THE WEEKEND SYSTEM. TEMPERATURES SHOULD REMAIN WELL BELOW NORMAL THROUGH THE MID PART OF NEXT WEEK. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR FRIDAY... BUT REPORTS OF ANY ACCUMULATING ICE AND SNOW AMOUNTS WILL BE APPRECIATED. NEZ011-012-016>018-030>032-191200- ANTELOPE-BOONE-CEDAR-KNOX-MADISON-PIERCE-STANTON-WAYNE- 436 PM CST THU DEC 18 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST NEBRASKA. .DAY ONE...TONIGHT AND FRIDAY. SNOW WILL OCCUR OVERNIGHT. A SNOW ADVISORY IS IN EFFECT FOR PARTS OF NORTHEAST NEBRASKA. SNOWFALL AMOUNTS COULD REACH 2 TO 6 INCHES. THE EDGE OF HEAVIEST SNOW IS CURRENTLY EXPECTED TO BE ALONG AND SOUTHEAST OF A LINE FROM ALBION TO NORFOLK AND WAYNE. SNOW SHOULD END LATE TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH CHRISTMAS DAY. VERY COLD ARCTIC AIR IS FORECAST TO BLAST INTO THE REGION SATURDAY ...ALONG WITH SOME LIGHT SNOW. WIND CHILLS FROM SATURDAY THROUGH SUNDAY SHOULD BE WELL BELOW ZERO. LISTEN FOR LATER FORECASTS REGARDING THE WEEKEND SYSTEM. TEMPERATURES SHOULD REMAIN WELL BELOW NORMAL THROUGH THE MID PART OF NEXT WEEK. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR FRIDAY... BUT SNOWFALL REPORTS WILL BE APPRECIATED. MILLER
The national radar mosaic for the moment the first event began.
4 winter storm, 2 ice storm. Local standard time, as filed.
Freezing rain accumulated around a quarter of an inch over most of the county.
Freezing rain accumulated around a quarter of an inch over most of the county.
A mix of freezing rain and sleet accumulated around 1/2 inch over most of the county. Although the mixture created hazardous driving conditions and stuck to vehicle windshields, accumulation on trees and power lines was somewhat limited.
A mix of freezing rain and sleet accumulated around 1/2 inch over most of the county. Although the mixture created hazardous driving conditions and stuck to vehicle windshields, accumulation on trees and power lines was somewhat limited.
A mix of freezing rain and sleet accumulated around 1/2 inch over most of the county. An inch or two of snow then fell on the mixture before the precipitation ended late Thursday night. Although the mixture created hazardous driving conditions and stuck to vehicle windshields, accumulation on trees and power lines was somewhat limited.
A mix of freezing rain and sleet accumulated around 1/2 inch over most of the county. A period of snow followed the mix precipitation with upwards of 3 to 5 inches of snow reported over the northwest half of the county.|Although the mixed precipitation created hazardous driving conditions,|accumulation on trees and power lines was somewhat limited.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2008Every state in 2008This day in weather historyWarnings in Iowa, December 2008
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 138996, 138997, 138998, 138999, 139000, 139001.