Strong south winds developed over the area in response to low pressure organizing over the northern plains. A strong low level jet in place and a few light showers around helped mix down some stronger winds which produced an isolated report of winds in excess of 70 mph near Norfolk.
Every event with a place to put it; 1 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.
Strong south winds developed over the area in response to low pressure organizing over the northern plains. A strong low level jet in place and a few light showers around helped mix down some stronger winds which produced an isolated report of winds in excess of 70 mph near Norfolk. However, most winds across the area in northeast Nebraska this evening were in the 35 to 50 mph range.
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 Sep 17, 3:02 PM CST, 7 hours 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 402 PM CDT MON SEP 17 2007 .DISCUSSION... CONDITIONS ARE SETTING UP FOR EXTENSIVE THUNDERSTORM DEVELOPMENT AS A SERIES OF SHORT WAVES EJECTS OUT OF WESTERN TROF...THE FIRST NOW ON THE CO FRONT RANGE. WARM MOIST AIR WILL BE IN PLACE AHEAD OF CDFNT IN CENTRAL NEB...WHICH WILL BE MOVING E TONIGHT. BOTH GFS AND NAM BRING PW VALUES NEAR FRONT UP TO 1.75 INCHES OR BETTER TNGT THROUGH TMRW AFTERNOON. THIS SHOULD PRODUCE FAIRLY WIDESPREAD TSTMS WITH HEAVY RAIN POTENTIAL AS FRONT MOVES SLOWLY SE. SEVERE WEATHER POTENTIAL IS LESS CLEAR. CAP MAY TAKE A WHILE TO ERODE IN OUR AREA THIS EVE AS TEMPS AS SOME CIN REMAINS IN PLACE. TSTMS MOVING IN FROM CNTRL NEB COULD PRODUCE SOME STRONG WIND LATER...BUT LOOKING FOR MAINLY MULTICELL OR LINEAR DEVELOPMENT WITH LACK OF DIRECTIONAL SHEAR AND MODEST CAPE. SEVERE POTENTIAL TUE WILL DEPEND ON EXTENT OF PRE FRONTAL PCPN AND HEATING IN THE AFTN. CONTINUED EJECTION OF SHORT WAVES INTO THE AREA WILL FAVOR MORE CLOUDS AND CHC TSTMS EVEN SOUTH OF THE FRONT...WITH COOLER TEMPS THAN TODAY. THERE MAY BE SOME LINGERING TSTMS IN THE SOUTH TUE NIGHT...BUT IT LOOKS LIKE PRECIP SHOULD BE PUSHED SOUTH OF THE AREA BY MORNING... WITH MOISTURE GETTING HUNG UP IN NRN KS. EXPECT ENOUGH CLEARING NORTH FOR A COOLER NIGHT. SUNSHINE WED SHOULD KEEP DAYTIME TEMPS AT OR ABOVE SEASONAL NORMALS. RETURN FLOW WILL BRING MOISTURE NORTH AGAIN ON WED NIGHT. KEPT A CHC OF TSTMS IN FCST AS LOW LVL JET INCREASES AS WELL. MODELS SUGGEST FRONTAL BOUNDARY WILL JUMP TO THE NORTH OF THE AREA THU MORNING...PUTTING FIRMLY BACK IN THE WARM SECTOR. HPC PROGS KEEP US THERE THROUGH THE EXTENDED. HOWEVER...MODELS ARE IN POOR AGREEMENT. STRONG SHORT WAVE TROUGH SKIRTING ACROSS SRN CANADA MIGHT PUSH A FRONT INTO OUR AREA ON FRIDAY. FRONTAL POSITIONS BY NEXT MONDAY ARE ALSO UP FOR GRABS...AS MODELS DIFFER WILDLY ON THEIR TIMING IN OPENING AND EJECTING A STRONG CLOSED LOW ON THE WEST COAST. IN VIEW OF UNCERTAINTY...KEPT FORECAST CLOSE TO HPC GUID AND PREVIOUS FCST...BUT MENTIONED A SLIGHT CHC OF RAIN N ON MONDAY FOR CONTINUITY WITH NORTHERN NEIGHBORS. && .AVIATION... STRONG TO SEVERE TS POSSIBLE ALL TAF SITES...OFK/OMA/LNK...AFT 04Z/18...BUT MOST LIKELY AT OFK WITH WIND THREAT MOST PREVALENT AND GUSTS 30-50KT LIKELY. SHOULD SEE STRONG TS ACTIVITY LAST THRU ABOUT 10Z-16Z WITH CONVECTIVE WIND SHEAR AND STRONG CROSS WINDS PROBABLE AT OFK...AND POSSIBLE AT OMA/LNK. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...NONE. IA...NONE. && POLLACK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 557 PM CDT MON SEP 17 2007 IAZ055-056-069-079-080-090-091-NEZ045-052-053-066>068-088>093- 181300- HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE- WASHINGTON-DOUGLAS-SARPY-LANCASTER-CASS-OTOE-JEFFERSON-GAGE- JOHNSON-NEMAHA-PAWNEE-RICHARDSON- 557 PM CDT MON SEP 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NEBRASKA AND SOUTHWEST IOWA. .DAY ONE...TONIGHT AND TUESDAY THUNDERSTORMS ARE POSSIBLE OVER THE OUTLOOK AREA LATER THIS EVENING AND ESPECIALLY OVERNIGHT. ALTHOUGH STORMS THIS EVENING COULD BRING ISOLATED DAMAGING WIND GUSTS AND POSSIBLY SOME HAIL...THE BULK OF THE STRONGEST STORMS SHOULD REMAIN SOUTHWEST THROUGH NORTHWEST OF THE REGION. THUNDERSTORM ACTIVITY WILL LIKELY CONTINUE OVER THE REGION TUESDAY. INTENSIFICATION IS POSSIBLE TUESDAY AFTERNOON WHEN A FEW SEVERE STORMS ARE POSSIBLE. AGAIN DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE FROM THE STRONGER STORMS. THE THUNDERSTORM ACTIVITY WILL BE FOCUSED ALONG AN APPROACHING COLD FRONT AIDED BY SEVERAL UPPER LEVEL DISTURBANCES THAT WILL TRACK ACROSS THE PLAINS. THE FRONT SHOULD REMAIN WEST OF THE REGION UNTIL LATE TUESDAY. .DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH MONDAY THUNDERSTORMS WILL CONTINUE ACROSS THE OUTLOOK AREA TUESDAY NIGHT. STRONG OR SEVERE STORMS COULD LINGER OVER THE REGION TUESDAY EVENING BEFORE THE ACTIVITY SHIFTS EAST OF THE REGION TUESDAY NIGHT. MORE THUNDERSTORMS ARE POSSIBLE WEDNESDAY NIGHT AS WARMER AND MORE MOIST AIR RETURNS TO THE REGION. .SPOTTER INFORMATION STATEMENT... THERE IS A SMALL CHANCE THAT STORM SPOTTER ACTIVATION MAY BE NEEDED...ESPECIALLY LATE TUESDAY AFTERNOON AND EVENING. IAZ043-NEZ011-012-015>018-030>034-042>044-050-051-065-078-181300- MONONA-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON- STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-BUTLER-SAUNDERS-SEWARD- SALINE- 557 PM CDT MON SEP 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NEBRASKA AND WESTERN IOWA. .DAY ONE...TONIGHT AND TUESDAY THUNDERSTORMS ARE POSSIBLE OVER THE OUTLOOK AREA TONIGHT. STORMS THIS EVENING COULD PRODUCE DAMAGING WINDS AND POSSIBLY SOME LARGE HAIL. THUNDERSTORM ACTIVITY WILL LIKELY CONTINUE OVER THE REGION TUESDAY. INTENSIFICATION IS POSSIBLE TUESDAY AFTERNOON WHEN A FEW SEVERE STORMS ARE POSSIBLE. AGAIN DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE FROM THE STRONGER STORMS. THE THUNDERSTORM ACTIVITY WILL BE FOCUSED ALONG AN APPROACHING COLD FRONT AIDED BY SEVERAL UPPER LEVEL DISTURBANCES THAT WILL TRACK ACROSS THE PLAINS. MODEST INSTABILITY AND WIND SHEAR THIS EVENING COULD LIMIT THE OVERALL SEVERITY OF THE STORMS...BUT LINEAR MULTICELL STORMS ARE EXPECTED WHICH COULD PRODUCE AREAS OF HEAVY RAIN ALONG WITH THE SEVERE WEATHER THREAT. .DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH MONDAY THUNDERSTORMS WILL CONTINUE ACROSS THE OUTLOOK AREA TUESDAY NIGHT...HOWEVER THE STRONGEST STORMS SHOULD BE SOUTHEAST OF THE REGION. MORE THUNDERSTORMS ARE POSSIBLE WEDNESDAY NIGHT AS WARM AND MOIST AIR RETURNS TO THE AREA. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION MAY BE NEEDED ACROSS THE AREA THIS EVENING AND THEN POSSIBLY AGAIN TUESDAY AFTERNOON. CHERMOK
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
A wind gust of 76 mph was measured by the Norfolk ASOS. The winds caused some minor damage, limited mainly to near the airport where the ASOS was located. Winds over the rest of the area where apparently much less.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2007Every state in 2007This day in weather historyWarnings in Nebraska, September 2007
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: 54587.