Strong east to southeast winds developed as high pressure over the Great Lakes region was replaced by low pressure that pressed east of the Rocky Mountains. The strong winds caused isolated wind damage north of Omaha.
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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.
Strong east to southeast winds developed as high pressure over the Great Lakes region was replaced by low pressure that pressed east of the Rocky Mountains. The strong winds caused isolated wind damage north of Omaha.
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 Apr 27, 5:28 AM CST, 5 hours 32 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 628 AM CDT FRI APR 27 2012 .AVIATION... 12Z TAFS FOR KOMA...KLNK...AND KOFK. DETERIORATING CONDITIONS ARE EXPECTED AT ALL SITES. EAST WINDS WILL INCREASE THROUGH THE MORNING AND AFTERNOON...WITH SPEEDS REACHING 20-25KT AND GUSTS REACHING 30-35KT. SPEEDS WILL DECREASE BELOW 10KT AROUND MIDNIGHT AS TROUGH PASSES THROUGH...WITH DIRECTION BACKING FROM EASTERLY TO NORTHWESTERLY. CIGS WILL DECLINE THROUGH THE DAY AS WELL...REACHING MVFR LATER THIS AFTERNOON AS BULK OF PRECIP OVERSPREADS THE AREA...AND CRASHING THIS EVENING TO AT LEAST IFR. HAVE INDICATED RAIN BEGINNING AROUND MIDDAY AT ALL SITES...WITH EARLIEST TIMING AT KLNK AND LATEST AT KOMA. RAIN SHOULD END AROUND 06-09Z AT ALL SITES. WITH INSTABILITY WEAK AT BEST IN THE AREA...KEPT THUNDER MENTION OUT OF TAFS. IF INSTABILITY SLIPS A LITTLE FURTHER NORTH THAN CURRENT FORECASTS INDICATE...COULD SEE LIGHTNING NEAR KLNK...BUT THOUGHT RISK WAS TOO LOW TO MENTION. MAYES && .PREV DISCUSSION... /ISSUED 342 AM CDT FRI APR 27 2012/ DISCUSSION... MAIN FORECAST CONCERN IS COMPACT UPPER LEVEL LOW CURRENTLY OVER ERN CO AND ITS EFFECT ON THE FA OVER THE NEXT 30 HOURS. AN INITIAL BATCH OF MID LEVEL CLOUDS AND A FEW LIGHT SHOWERS HAVE PUSHED MAINLY E OF THE FA THIS MORNING AND WE ARE IN BETWEEN THAT...AND A LARGER AREA OF SHOWERS OFF TO THE WEST ASSOCIATED WITH THE UPPER LEVEL SYSTEM. THIS AREA WILL STEADILY MOVE TOWARD THE E THIS MORNING AS THE LOW LEVEL JET INCREASES AHEAD OF THE SYSTEM ALLOWING FOR STRONG ISENTROPIC ON THE 295 AND 300 K SFC'S. ONLY REAL CHANGE TO THE FORECAST WAS TO SLOW THE EWD PROGRESSION OF THE RAIN SHIELD SOME...ESPECIALLY IN WRN IA WHERE THE RAIN MAY NOT MAKE IT UNTIL EARLY AFTN. OTHERWISE WE SHOULD SEE OCCASIONAL SHOWERS THRU THE AFTN WITH INCREASING DIV-Q IN THE LEFT EXIT REGION OF A STRONG 300 MB JET MOVING THRU CNTRL KS LEADING TO ADDITIONAL FORCING FOR ASCENT WITH THE ISENTROPIC LIFT. POINT FORECAST SOUNDING...AS WELL AS MODEL STABILITY PROGGS INDC SOME THUNDER IS POSSIBLE IN THE SOUTH GIVEN THE LAPSE RATES AND WE WILL CONT THE THUNDER MENTION THERE. AS THE MID-LEVEL DRY SLOT WORKS THRU NE KS INTO NW MO LATE THIS AFTN AND INTO THE EARLY EVNG HOURS A LITTLE STEEPER MID LEVEL LAPSE RATES OVER-SPREAD SE NEB INTO NW MO...AND THIS MAY BE A PERIOD /I.E. 22-03Z/ WHERE A STRONGER ELEVATED STORM MAY BE POSSIBLE WITH A BIT OF SMALL HAIL. OTHERWISE THE RAIN SHIELD ON THE LEADING EDGE OF THE STRONG DPVA WILL CONT TO MOVE FM W TO E ACRS THE FA THIS EVNG ENDING IN THE W/SW BY MID EVNG AND ALNG THE RIVER JUST AFTER MIDNIGHT...AND IN W-CNTRL IA ARND 3 AM. RELATIVELY QUIET WEATHER WILL THEN SET IN FOR THE FA FOR THE PERIOD SAT THROUGH MON WITH THE MAIN MOISTURE/INSTABILITY OFF TO OUR SOUTH. THE MOISTURE STARTS TO MAKE A RETURN TOWARD THE AREA ON MON NIGHT...BUT ESPECIALLY ON TUE/WED AND WE WILL CONT WITH THE CHC OF SHOWERS/STORMS AT THAT TIME WITH DRY CONDS RETURNING FOR THU. WE SHOULD GENERALLY SEE A WARMING TREND STARTING ON SAT INTO THE EXTENDED...WITH TMPS RETURNING TO ABOVE NORMAL BY MON AND CONTG THRU THU. BOUSTEAD && .OAX WATCHES/WARNINGS/ADVISORIES... NE...NONE. IA...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1057 AM CDT FRI APR 27 2012 NEZ050-065-078-088-272200- BUTLER-JEFFERSON-SALINE-SEWARD- 1057 AM CDT FRI APR 27 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EARLY THIS EVENING. SOME STORMS MAY CONTAIN SMALL HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ADDITIONAL THUNDERSTORMS ARE POSSIBLE MONDAY NIGHT THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. NEZ011-016-017-030>032-042-043-272200- ANTELOPE-BOONE-COLFAX-KNOX-MADISON-PIERCE-PLATTE-STANTON- 1057 AM CDT FRI APR 27 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT SOUTHEAST WINDS GUSTING 30 TO 40 MPH ARE EXPECTED THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ADDITIONAL THUNDERSTORMS ARE POSSIBLE MONDAY NIGHT THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. IAZ043-055-056-NEZ012-015-018-033-034-044-045-272200- BURT-CEDAR-CUMING-DODGE-HARRISON IA-MONONA IA-SHELBY IA-THURSTON- WASHINGTON-WAYNE- 1057 AM CDT FRI APR 27 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST-CENTRAL IOWA AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT A WIND ADVISORY IS IN EFFECT UNTIL 5 PM. SOUTHEAST WINDS GUSTING AROUND 45 MPH WILL PERSIST THROUGH THIS AFTERNOON. WINDS THIS STRONG WILL MAKE DRIVING DIFFICULT FOR LIGHT WEIGHT AND HIGH PROFILE VEHICLES...AND ESPECIALLY FOR MOTORCYCLES. EXTRA CAUTION IS ADVISED. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ADDITIONAL THUNDERSTORMS ARE POSSIBLE MONDAY NIGHT THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. IAZ069-079-080-090-091-NEZ051>053-066>068-089>093-272200- CASS-DOUGLAS-FREMONT IA-GAGE-JOHNSON-LANCASTER-MILLS IA- MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-POTTAWATTAMIE IA-RICHARDSON- SARPY-SAUNDERS- 1057 AM CDT FRI APR 27 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA...EAST-CENTRAL AND SOUTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT A WIND ADVISORY IS IN EFFECT UNTIL 5 PM. SOUTHEAST WINDS GUSTING AROUND 45 MPH WILL PERSIST THROUGH THIS AFTERNOON. WINDS THIS STRONG WILL MAKE DRIVING DIFFICULT FOR LIGHT WEIGHT AND HIGH PROFILE VEHICLES...AND ESPECIALLY FOR MOTORCYCLES. EXTRA CAUTION IS ADVISED. ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EARLY THIS EVENING. SOME STORMS MAY CONTAIN SMALL HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ADDITIONAL THUNDERSTORMS ARE POSSIBLE MONDAY NIGHT THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
The national radar mosaic for the moment the first event began.
1 strong wind. Local standard time, as filed.
Strong east to southeast winds developed over the area during the morning and afternoon of April 27. The strong winds blew part of the roof off of a local business near Tekamah. Winds were measured at around 45 mph by the Asos near Tekamah.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2012Every state in 2012This day in weather historyWarnings in Nebraska, April 2012
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: 369904.