A weak cold front, possibly reinforced by thunderstorms that occurred either earlier in the afternoon or during the previous evening, caused a few severe thunderstorms to develop from southwest Iowa into southeast Nebraska. Due to hot and humid conditions present over the region, the thunderstorms were mainly the wet micro-burst variety although some hail was reported.
Every event with a place to put it. 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 weak cold front, possibly reinforced by thunderstorms that occurred either earlier in the afternoon or during the previous evening, caused a few severe thunderstorms to develop from southwest Iowa into southeast Nebraska. Due to hot and humid conditions present over the region, the thunderstorms were mainly the wet micro-burst variety although some hail was reported.
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 Jun 24, 2:49 AM CST, 11 hours 5 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
349 AM CDT WED JUN 24 2009
.DISCUSSION...
FORECAST CONERNS THROUGH TONIGHT WILL BE THE CHANCE FOR
THUNDERSTORMS (SOME SEVERE) AND CURRENT HEAT HEADLINES.
THE 00Z OAX SOUNDING AGAIN HAD PLENTY OF PW AND INSTABILITY AROUND
2600 J/KG AND LI OF -7. A 90KT JET STREAK WAS OVR THE NRN PLAINS
AND THIS IS AIDING IN UPR LEVEL DIV OVR THE FCST AREA.WITH THERE WERE A
NUMBER OF OUTFLOW BOUNDARIES NOTED ON THE RADAR...WITH THE MAIN
SFC FNT WEST OF HJH...EAST OF ORD AND AROUND NORFOLK. A CONVECTIVE
COMPLEX IS CURRENTLY PUSHING INTO THE WRN AND NORTHERN PARTS OF
THE CWA AND THIS IS AHEAD OF A SHORTWAVE TROF OVR WRN NEB. ANOTHER
AREA OF MULTICELLS WAS FARTHER SOUTH INTO KANSAS AND THIS APPEAR
TO BE WHERE THE THETA-E ADVECTION WAS A LITTLE STRONGER.THERE WAS A
MESOHIGH NOTED WEST OF THE CONVECTION AND SFC WINDS WERE GUSTY
FROM 9 TO 31 KTS.SFC DEWPOINTS WERE NOT NEARLY AS HIGH WITH
DEWPOINTS MOSTLY IN THE 60S WITH A FEW 70S A LCG AND YKN.
THE SHORTWAVE TROF IS PROGRESSIVE LIFTING NORTHEAST ACRS NEB INTO
IOWA. EXPECT THE STORMS TO CONTINUE EASTWARD THIS MORNING IN THE
MEAN FLOW...WITH INSTABILITY (MU CAPE AROUND 2000=3000 J/KG) WITH
THE CLOUDS AND PRECIP IN THE NORTH...THIS SHOULD HOLD TEMPERATURES
DOWN. THE SHORTWAVE TROF HANGS AROUND THIS AFTERNOON DIPPING INTO
IA AND WITH THE LOW LEVEL CONVERGENCE ALONG THE FRONT AND
FAVORABLE THERMODYNAMICS..WOULD THINK TSRA WOULD CONTINUE INTO THE
AFTERNOON BASED ON EXPECTED HIGHS IN THE 80S NORTH AND THE 90S
SOUTH AND INCREASE IN SURFACE DEWPOINTS. WILL MAINTAIN THE HEAT
ADVISORY AND THE EXCESSIVE HEAT WARNING. DID TRIM THE ADVISORY IN
THE NORTHWEST COUNTIES AND STORMS/CLOUDS WILL AFFECT NEED
ADVISORY/WARNING LATER TODAY...THUS ADDITIONAL ADJUSTMENTS MAY
NEED TO BE MADE.
TONIGHT...THETA-ADVECTION CONTINUES ALONG WITH SCT THUNDERSTORMS.
THE DEEP LAYER SHEAR GRADIENT NR THE NEB/SD BORDER INCREASES TO
50KKTS FM THE NW WED NIGHT. THE COMBINATION OF THE HEAT...VARIOUS
MESOSCALE BOUNDARIES...THE INSTABILITY...AND SHEAR...SOME STORM
MAY PRODUCE DAMAGING WINDS AND LARGE HAIL WILL BE POSSIBLE.
THURSDAY THE RIDGE BUILDS IN AND IT LOOKS DRY
FRIDAY AND FRIDAY NIGHT...SOUTHWEST FLOW ALOFT INCREASES WITH SFC
LOW PRES OVR THE WRN PLAINS. CONVECTION IS EXPECTED TO DEVELOP OUT
WEST AND MOVE INTO THE REGION. THE MID LEVEL TROF DIGS INTO THE
NTHRN AND CNTRL PLAINS SATURDAY...AGAIN MORE THUNDERSTORMS CAN BE
EXPECTED WITH THIS TROF.
&&
.AVIATION...
FOR TAF SITES KOFK/KOMA/KLNK VALID THROUGH 25/06Z.
CONVECTION POTENTIAL APPEARS TO BE THE MAIN CONCERN AT THE TAF SITES
THROUGH THE PERIOD. -SHRA APPEARS EMMINENT AT KOFK AND COULD
LINGER THROUGH ABOUT 12Z...THEN THERE WILL LIKLEY BE A BREAK WITH
MORE CONVECTION POSSIBLE THIS AFTERNOON AT KOFK FROM 19Z-23Z.
WHILE THERE MAY BE A CHANCE OF THUNDERSTORMS AT KLNK/KOMA...DUE TO
UNCERTAINTIES IN TIMING AND EVENTUAL EVOLUTION...OPTED TO NOT
MENTION IN THE TAFS ATTM...ALTHOUGH MAY HAVE TO CONSIDER ADDING A
PROB30 GROUP FOR THE 12Z TAFS FOR THE LATE AFTERNOON AND
EVENING...PERHAPS 22Z-06Z.
&&
.OAX WATCHES/WARNINGS/ADVISORIES...
NE...HEAT ADVISORY UNTIL 9 PM CDT THIS EVENING FOR NEZ034-044-045-051-
065-066-078-088-089.
EXCESSIVE HEAT WARNING UNTIL 9 PM CDT THIS EVENING FOR NEZ052-
053-067-068-090>093.
IA...HEAT ADVISORY UNTIL 9 PM CDT THIS EVENING FOR IAZ055-056.
EXCESSIVE HEAT WARNING UNTIL 9 PM CDT THIS EVENING FOR IAZ069-
079-080-090-091.
&&
ZAPOTOCNY/DEWALDHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1153 AM CDT WED JUN 24 2009 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-250700- MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT- PAGE-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON- STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-BUTLER- SAUNDERS-DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE- JEFFERSON-GAGE-JOHNSON-NEMAHA-PAWNEE-RICHARDSON- 1153 AM CDT WED JUN 24 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST NEBRASKA AND SOUTHEAST NEBRASKA. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS...SOME SEVERE WITH DAMAGING WINDS AND LARGE HAIL ALONG WITH HEAVY DOWNPOURS OF RAIN WILL BE POSSIBLE LATER THIS AFTERNOON AND TONIGHT ACROSS THE OUTLOOK AREA. AN ISOLATED TORNADO CANNOT BE RULED OUT...ESPECIALLY ACROSS NORTHEASTERN NEBRASKA. ONGOING THUNDERSTORMS ACROSS CENTRAL NEBRASKA...MAINLY NEAR HIGHWAY 30...ARE EXPECTED TO REMAIN UNDER SEVERE LIMITS THROUGH THE MID AFTERNOON HOURS. AS HEATING INCREASES THIS AFTERNOON...SOME OF THESE THUNDERSTORMS COULD APPROACH SEVERE LEVELS WITH DAMAGING WIND AND SMALL HAIL AS THE PRIMARY HAZARDS. THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS SOUTHERN SOUTH DAKOTA LATER THIS AFTERNOON ALONG A FRONTAL BOUNDARY. THESE THUNDERSTORMS WOULD MOVE SOUTH SOUTHEAST ALONG THE FRONT AND COULD QUICKLY BECOME SEVERE ACROSS NORTHEASTERN NEBRASKA. DAMAGING WIND AND HAIL WOULD BE THE PRIMARY HAZARDS. HOWEVER...DUE TO STRONG SHEAR...AN ISOLATED TORNADO CANNOT BE RULED OUT LATER THIS AFTERNOON AND THIS EVENING...ESPECIALLY NORTH OF HIGHWAY 20. AN EXCESSIVE HEAT WARNING IS POSTED FOR EXTREME SOUTHWEST IOWA AND EXTREME SOUTHEAST NEBRASKA WHERE HEAT INDICES ABOVE 110 ARE LIKELY. OTHERWISE...A HEAT ADVISORY IS POSTED FOR MUCH OF EAST CENTRAL NEBRASKA AND WEST CENTRAL IOWA WHERE HEAT INDICES AROUND 100 ARE POSSIBLE THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THE CHANCE FOR THUNDERSTORMS WILL CONTINUE FROM FRIDAY INTO SATURDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY AND TONIGHT. KERN
The Topeka radar (KTWX), 116 km away, was scanning. The volume nearest the first event began at 19:51 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
A spotter estimated thunderstorm wind gusts of 60 mph lasted for around 20 minutes in the Du Bois area. The winds were accompanied by torrential rain.
Thunderstorm winds estimated at around 60 mph were also reported in the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2009Every state in 2009This day in weather historyWarnings in Nebraska, June 2009
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: 167544, 167545.