An isolated morning thunderstorm developed over Stanton county in an area with steep mid level lapse rates and an enhanced area of low level convergence.
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The episode as NWS OAX wrote it up.
An isolated morning thunderstorm developed over Stanton county in an area with steep mid level lapse rates and an enhanced area of low level convergence.
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 3, 4:47 AM CST, 1 hour 8 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 547 AM CDT MON SEP 3 2012 .AVIATION... EXPECT A GENERAL INCREASE IN SHOWER AND THUNDERSTORM COVERAGE THIS MORNING AND EARLY AFTERNOON. FORECAST SOUNDINGS SHOW THAT IF PCPN OCCURS...IT WOULD MOST LIKELY BE TSRA RATHER THAN JUST SHRA. TRIED TO TIME THIS WITH TEMPO GROUPS. CEILINGS SHOULD REMAIN VFR...BUT SOME MVFR VSBYS MAY OCCUR IN THE PCPN. WINDS WILL GENERALLY BE LESS THAN 10 KNOTS...BUT HIGHER VALUES POSSIBLE WITH TSTM OUTFLOW. MILLER && .PREV DISCUSSION... /ISSUED 411 AM CDT MON SEP 3 2012/ DISCUSSION... MAIN FORECAST CONCERN CENTERS AROUND THUNDERSTORM CHANCES THE NEXT FEW DAYS THEN AGAIN ON THURSDAY. LATEST WATER VAPOR IMAGERY SHOWS WEAK MID LEVEL SHORTWAVE OVER NORTHEASTERN COLORADO. OUT AHEAD OF THIS FEATURE...REGIONAL RADAR MOSIAC IS SHOWING A FEW RETURNS ACROSS SOUTHWESTERN NEBRASKA. AS THE MENTIONED SHORTWAVE CONTINUES TO MOVE NORTHEAST THIS MORNING...DO ANTICIPATE SCATTERED SHOWERS AND A FEW THUNDERSTORMS TO DEVELOP BY MID TO LATE MORNING WHEN STRONGEST VERTICAL MOTION IS FORECAST OVER THE AREA. MUCH OF THE ACTIVITY WOULD BE CONFINED TO A STALLED SFC FRONTAL BOUNDARY EXTENDING ACROSS NORTHEAST NEBRASKA. THIS FRONT IS EXPECTED TO DRIFT SOUTHEAST INTO THE SOUTHEASTERN FORECAST AREA THIS AFTERNOON. UPPER LEVEL FORCING WILL BE ENHANCED THROUGHOUT THE AFTERNOON AS RIGHT REAR QUAD OF 300MB JET MAX TRAVELS OVERHEAD. WILL CARRY THE BEST TSTM CHANCES ACROSS OUR SOUTHEASTERN COUNTIES ALONG THE SFC FRONT IN THE AFTERNOON. FORECAST DEWPOINTS SOUTH OF THE BOUNDARY ARE FORECAST IN THE UPPER 60S TO AROUND 70. DEPENDING ON RESIDUAL CLOUD COVER...THE AREA MAY NOT BECOME AS MODERATELY UNSTABLE AS EARLIER FORECAST...WHICH WOULD LIMIT SEVERE WEATHER CHANCES SIGNIFICANTLY THIS AFTERNOON. IF SUN DOES HEAT THE AREA THIS AFTERNOON...A MODERATELY UNSTABLE AIRMASS ALONG WITH 0-6KM BULK SHEAR ON THE ORDER OF 40-50KTS COULD PRODUCE SCATTERED SEVERE TSTMS...MAINLY SOUTH OF I-80. ENOUGH BULK SHEAR WOULD BE PRESENT TO PRODUCE A FEW SUPERCELLS. FORECASTER CONFIDENCE ON THIS IS LOW DUE TO UNCERTAINTY ON AMOUNT OF AFTERNOON DESTABILIZATION. ANOTHER AREA OF SCATTERED SHOWERS IS FORECAST TO DEVELOP THIS AFTERNOON TO OUR NORTHWEST ALONG A MORE WELL DEFINED SURFACE COLD FRONT EXTENDING ACROSS THE CENTRAL DAKOTAS AND INTO CENTRAL NEBRASKA. A WEAK MID LEVEL SHORTWAVE IS ALSO FORECAST TO SLIDE ACROSS SOUTHERN SOUTH DAKOTA LATER THIS AFTERNOON INTO THIS EVENING PROVIDING FORCING FOR ASCENT. IF STORMS DO DEVELOP ALONG THIS BOUNDARY...THEY COULD SPREAD INTO OUR FAR NORTHWESTERN COUNTIES DURING THE EVENING HOURS BUT QUICKLY DISSIPATE WITH LOSS OF SUN IN THE EVENING. TSTM ACTIVITY EXPECTED TO RETURN TO THE AREA TUESDAY AS A COLD ACROSS THE HIGH PLAINS BECOMES MORE WELL DEFINED DURING THE AFTERNOON AS IT PUSHES EAST ACROSS THE CENTRAL DAKOTAS AND INTO CENTRAL NEBRASKA. TSTMS ARE POSSIBLE ALONG THE BOUNDARY AS IT QUICKLY PUSHES SOUTHEAST OVER THE ENTIRE FORECAST AREA BY 12Z WED. HIGH PRESSURE BUILDS IN BEHIND THE BOUNDARY LEAVING WEDNESDAY DRY. THE NEXT CHANCE FOR TSTMS COMES THURSDAY INTO FRIDAY AS A POTENT SHORTWAVE MOVES INTO THE CENTRAL PLAINS. A WARM FRONT WILL SET UP SOMEWHERE IN THE CENTRAL PLAINS AND BE THE FOCUS FOR SHOWERS AND THUNDERSTORMS...MAINLY ACROSS THE SOUTHERN CWA. COOLER TEMPERATURES ARE EXPECTED FOR LATE THIS WEEK AND INTO THE WEEKEND AS A STRONG UPPER TROUGH DROPS ACROSS THE REGION AND EVENTUALLY CLOSES OFF OVER THE OHIO VALLEY REGION BY THE MIDDLE PART OF THE WEEKEND. KERN && .OAX WATCHES/WARNINGS/ADVISORIES... NE...NONE. IA...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 423 AM CDT MON SEP 3 2012 IAZ069-079-080-090-091-NEZ050>053-065>068-078-088>093-032330- POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE-BUTLER-SAUNDERS- DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE-JEFFERSON-GAGE- JOHNSON-NEMAHA-PAWNEE-RICHARDSON- 423 AM CDT MON SEP 3 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA...EAST CENTRAL NEBRASKA AND SOUTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND A FEW ISOLATE THUNDERSTORMS ARE POSSIBLE LATER THIS MORNING. SEVERE STORMS ARE NOT ANTICIPATED WITH THIS ROUND OF STORMS...BUT MAY BE POSSIBLE LATER THIS AFTERNOON. A WEAK FRONTAL BOUNDARY WILL SAG SOUTH TODAY AND WILL BE THE FOCUS FOR THUNDERSTORMS INTO THE EVENING. A QUICK MOVING UPPER LEVEL DISTURBANCE WILL AID THUNDERSTORM DEVELOPMENT THIS AFTERNOON. STORMS COULD BECOME SEVERE LATER THIS AFTERNOON WITH DAMAGING WIND AND LARGE HAIL THE PRIMARY HAZARDS. IF CLOUD COVER PERSISTS THROUGHOUT MUCH OF THE AFTERNOON...THIS WILL LIMIT THE INSTABILITY AND SEVERE STORMS WOULD THEN BE LESS LIKELY. ANY SEVERE STORMS SHOULD REMAIN GENERALLY SOUTH OF INTERSTATE 80. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL THUNDERSTORMS WILL BE POSSIBLE TUESDAY NIGHT AND FROM THURSDAY INTO FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ACROSS SOUTHEAST NEBRASKA AND SOUTHWEST IOWA LATER THIS AFTERNOON AND EARLY THIS EVENING. IAZ043-055-056-NEZ011-012-015>018-030>034-042>045-032330- MONONA-HARRISON-SHELBY-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE- BOONE-MADISON-STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON- 423 AM CDT MON SEP 3 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE LATER THIS MORNING AND INTO THE AFTERNOON ALONG A NEARLY STALLED FRONT EXTENDING ACROSS NORTHEAST NEBRASKA. SEVERE STORMS ARE NOT ANTICIPATED ACROSS NORTHEAST NEBRASKA AND WEST CENTRAL IOWA...BUT ARE POSSIBLE ACROSS SOUTHEAST NEBRASKA AND SOUTHWEST IOWA LATER TODAY. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL THUNDERSTORMS WILL BE POSSIBLE TUESDAY NIGHT AND FROM THURSDAY INTO FRIDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT LIKELY BE NEEDED TONIGHT. KERN
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
633 AM CDT MON SEP 3 2012
NEZ032-033-031200-
STANTON NE-CUMING NE-
633 AM CDT MON SEP 3 2012
...SIGNIFICANT WEATHER ADVISORY FOR STANTON AND SOUTHWESTERN
CUMING COUNTIES UNTIL 700 AM CDT...
AT 632 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A STRONG THUNDERSTORM 7 MILES NORTH OF CLARKSON...OR 19
MILES SOUTHEAST OF NORFOLK...MOVING EAST AT 30 MPH.
HAIL UP TO THE SIZE OF DIMES AND WIND GUSTS UP TO 35 MPH WILL BE
POSSIBLE WITH THIS STORM.
LOCATIONS THAT MAY BE IMPACTED INCLUDE...
STANTON...WISNER AND PILGER.
LAT...LON 4209 9703 4209 9698 4177 9667 4175 9724
4192 9736
TIME...MOT...LOC 1132Z 258DEG 27KT 4183 9716
MILLERThe Omaha radar (KOAX), 90 km away, was scanning. The volume nearest the first event began at 11:55 UTC.
1 hail. Local standard time, as filed.
Hail occurred at the intersection of highways 15 and 32 as well as 9 miles northwest of Howells.
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, September 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: 399125.