A small cluster of thunderstorms developed during the early evening of August 10 southwest of Beatrice on a weak boundary that mainly proved to be a wind shift. Temperatures and dew point temperatures were in the lower to mid 90s and mid 70s respectively on both sides of the boundary providing extremely unstable conditions.
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 small cluster of thunderstorms developed during the early evening of August 10 southwest of Beatrice on a weak boundary that mainly proved to be a wind shift. Temperatures and dew point temperatures were in the lower to mid 90s and mid 70s respectively on both sides of the boundary providing extremely unstable conditions. One of the thunderstorms periodically produced damaging winds as it pulsed between severe and non-severe from southeast Nebraska into southwest Iowa.
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 Aug 10, 2:24 PM CST, 7 hours 41 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
324 PM CDT TUE AUG 10 2010
.SHORT TERM...
TONIGHT...A BAND OF THUNDERSTORMS CONTINUED TO DEVELOP THROUGH
THE EARLY AFTERNOON ACROSS EASTERN NEBRASKA AND WEST CENTRAL
IOWA...MORE CLOSELY ALIGNED WITH GFS TIMING. THIS BAND WAS MOVING
INTO VERY UNSTABLE AIRMASS OF 5000 J/KG MUCAPE IN SOUTHWEST IOWA
AND SOUTHEAST NEBRASKA...BUT BULK SHEAR WAS MORE IMPRESSIVE NORTH
OF OUR AREA NEARER UPPER SUPPORT OF MID LEVEL WAVE MOVING EAST
THROUGH THE NORTHERN PLAINS. LOW LEVEL CONVERGENCE WAS NOTED IN
WIND FIELDS APPROACHING THE MISSOURI RIVER THIS AFTERNOON WITH
SOUTHWEST OR WESTERLY SURFACE WINDS TO THE WEST. WILL MAINTAIN AT
LEAST CHANCE POPS ALONG AND EAST OF THIS LOW LEVEL CONVERGENCE
LINE THROUGH THE EVENING...THEN TAPER POPS WEST TO EAST AFTER
MIDNIGHT. SOME DEVELOPMENT IN CENTRAL KANSAS MAY ALSO MAKE A RUN
FOR SOUTHEAST NEBRASKA THIS EVENING BEFORE INSTABILITY WANES WITH
SUNSET.
EXPECT LIGHT SOUTHWEST OR WEST WINDS TO OVERSPREAD THE CWA AFTER
MIDNIGHT AS PER GFS FORECAST. THIS SHOULD KEEP FOG POTENTIAL AT A
RELATIVE MINIMUM ACROSS THE CWA...BUT COULD SEE SPOTTY AREAS OF FOG
IN LOW LYING AREAS. LOWS TONIGHT SHOULD DROP OFF INTO THE 60S IN OUR
NORTHWEST WHERE DRIER AIR WILL INFILTRATE...WITH 70S IN THE
SOUTHEAST.
.LONGER TERM...THE HEAT AND HUMIDITY WILL PERSIST FOR WEDNESDAY AND
THURSDAY. THE SHORTWAVE TROF THAT IS OVR THE PLAINS WILL MOVE INTO
THE GREAT LAKES WEDNESDAY. THIS WILL ALLOW THE MID LEVEL RIDGE TO
BUILD IN BEHIND IT AND REMAIN THERE INTO THURSDAY. A SERIES OF
WAVES EMBEDDED IN THE FLOW ALOFT WILL TRACK ACRS THE NRN PLAINS.
HIGHS WEDNESDAY SHOULD TOP OUT IN THE 90S WITH HEAT INDEX VALUES
95 TO 105 IN THE NORTH AND 105 TO 115 IN THE SOUTH. WILL LEAVE THE
EXCESSIVE HEAT WARNING AS IS. ANY CHANGES MADE WOULD BE TO
POSSIBLY EXPAND COUNTIES FOR WED. OVERNIGHT SHIFT WILL LIKELY
TWEAK AS NEEDED FOR WED/THU.
THE FIRST WAVE WEDNESDAY NIGHT WILL TRACK WELL TO THE NORTH WITH
COOLING TEMPS ALOFT AND TSRA FOR THE DAKOTAS. THE COOLER TEMPS
ALOFT WILL TRY TO WORK SOUTH...BUT WILL HAVE TROUBLE WORKING INTO
THE HOT MID LEVEL TEMPS. SOME OF THE STORMS MAY FORM ALONG THE FNT
AND WORK INTO NCNTRL NEB THURSDAY AFTERNOON. THE COMBINATION OF
THE SHORTWAVE...DEEP MOISTURE...LLVL...AND THE NORTH TO SOUTH
INSTABILITY AXIS MAY ALLOW THE STORMS TO DEVELOP SOUTHWARD. AT
THIS TIME HAVE THE BETTER CHANCES FOR TSRA THU NIGHT AND FRIDAY
EVENING...WE SHOULD BE MORE ON THE SRN PORTION OF THE CONVECTIVE
SYSTEM THURSDAY NIGHT...WITH STORMS DECREASING...THEN REDEVELOPING
FRIDAY AFT/NIGHT. ANY OUTFLOW BOUNDARY FROM THE CONVECTION TO THE
NORTH OR CLOUDS COULD BE A PROBLEM FOR TEMPS THURSDAY. INSTABILITY
WILL BE MODERATE TO HIGH WITH THE BETTER DEEP SHEAR FARTHER NORTH
TOWARD SOUTH DAKOTA. FOR FRIDAY...BOTH THE SHEAR AND INSTABILITY
WILL BE MOD TO HIGH...FAVORABLE FOR SVR WX. AM COUNTING ON CLOUDS
TO MOVE INTO THE NORTH THURSDAY WITH HIGHS IN THE LOWER 90S AND
MID TO UPR 90S ELSEWHERE. AGAIN...HI/S OF 105 TO 115...EXCESSIVE
HEAT WARNING CRITERIA SHOULD BE MET BY MUCH OF THE SAME AREA FOR
THUR. HIGHS FRIDAY WILL DEPEND ON THE PROGRESS OF THE FRONT AND
CLDS. EXPECT A GRADIENT FROM NORTH TO SOUTH WITH HIGHS IN THE MID
80S NORTH TO MID 90S SOUTH FRIDAY.
THE EXTENDED IS STILL ADVERTISING A WELCOME COOL DOWN AS THE
RIDGE IS BROKEN DOWN OVR THE NRN PLAINS AND GRTLKS INTO MUCH OF
THE CNTRL U.S. COOLER WITH HIGHS NEAR OR BELOW NORMAL SATURDAY
THROUGH TUESDAY.
&&
.AVIATION...
TAF SITES KOFK/KOMA/KLNK
18Z TAFS
MAINLY VFR CONDITIONS ARE EXPECTED AT ALL EASTERN NEBRASKA TAF SITES
THROUGH WEDNESDAY AFTERNOON. A BAND OF THUNDERSTORMS MAY DEVELOP
SOUTHWEST NEAR THE KOMA AND KLNK SITES...BUT ONLY ISOLATED STORMS
ARE EXPECTED THROUGH 00Z. OTHERWISE SOUTHWEST TO WEST LOW LEVEL FLOW
SHOULD KEEP LOW CLOUDS AND FOG AT A MINIMUM AFTER 00Z...BUT SOME
MVFR VSBYS ARE POSSIBLE BETWEEN 10Z AND 14Z.
&&
.OAX WATCHES/WARNINGS/ADVISORIES...
NE...EXCESSIVE HEAT WARNING UNTIL 8 PM CDT THURSDAY FOR NEZ034-
044-045-051>053-065>068-078-088>093.
IA...EXCESSIVE HEAT WARNING UNTIL 8 PM CDT THURSDAY FOR IAZ043-
055-056-069-079-080-090-091.
&&
DERGAN/ZAPOTOCNY/DERGANHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 459 PM CDT TUE AUG 10 2010 IAZ043-055-056-069-079-080-090-091-NEZ034-044-045-051>053-065>068- 078-088>093-111200- MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT- PAGE-BURT-DODGE-WASHINGTON-SAUNDERS-DOUGLAS-SARPY-SEWARD- LANCASTER-CASS-OTOE-SALINE-JEFFERSON-GAGE-JOHNSON-NEMAHA-PAWNEE- RICHARDSON- 459 PM CDT TUE AUG 10 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA AND SOUTHEAST NEBRASKA. .DAY ONE...TONIGHT AND WEDNESDAY THERE IS A SLIGHT RISK FOR SEVERE STORMS THIS EVENING. DAMAGING WINDS WILL BE THE PRIMARY HAZARD. SCATTERED THUNDERSTORMS ARE POSSIBLE...ESPECIALLY ACROSS SOUTHEAST NEBRASKA AND SOUTHWEST IOWA THIS EVENING. STORMS OVER NORTHEAST KANSAS MAY CONTINUE TO MOVE NORTHEAST INTO THE AREA WHERE THE AIRMASS IS VERY UNSTABLE. THE LIMITING FACTOR FOR WIDESPREAD SEVERE WEATHER IS THE LACK OF STRONG WIND SHEAR. A FEW ISOLATED SEVERE STORMS WILL BE POSSIBLE HOWEVER. AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT FOR THE AREA. HEAT INDICES WEDNESDAY AFTERNOON WILL BE IN THE 110 TO 115 RANGE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY DANGEROUS HEAT AND HUMIDITY WILL CONTINUE THROUGH AT LEAST THURSDAY...AND POSSIBLY INTO FRIDAY IN SOUTHEAST NEBRASKA AND SOUTHWEST IOWA. DAYTIME TEMPERATURES DURING THIS TIME WILL REACH WELL INTO THE 90S EACH DAY...WITH OVERNIGHT LOWS REMAINING MOSTLY IN THE 70S. HUMIDITY ALSO WILL REMAIN HIGH THROUGH THE WEEK. THE COMBINATION WILL CREATE THE POTENTIAL FOR HEAT INDEX READINGS OF AROUND 105 DEGREES...WITH HEAT INDICES UP TO AROUND 120 DEGREES POSSIBLE IN SOUTHWEST IOWA AND SOUTHEAST NEBRASKA. THUNDERSTORMS ARE POSSIBLE FROM THURSDAY NIGHT THROUGH FRIDAY NIGHT AS A COLD FRONT MOVES ACROSS THE AREA. SEVERE STORMS MAY BE POSSIBLE WITH THE PASSAGE OF THIS COLD FRONT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT LIKELY BE NEEDED TONIGHT OR WEDNESDAY. NEZ011-012-015>018-030>033-042-043-050-111200- KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-STANTON- CUMING-PLATTE-COLFAX-BUTLER- 459 PM CDT TUE AUG 10 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL NEBRASKA AND NORTHEAST NEBRASKA. .DAY ONE...TONIGHT AND WEDNESDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...WEDNESDAY NIGHT THROUGH TUESDAY DANGEROUS HEAT AND HUMIDITY WILL RETURN WEDNESDAY AND THURSDAY WITH HEAT INDICES LIKELY NEAR 105. THUNDERSTORMS ARE POSSIBLE THURSDAY NIGHT THROUGH FRIDAY NIGHT AS A COLD FRONT MOVES ACROSS THE AREA. SEVERE STORMS ARE POSSIBLE WITH THE PASSAGE OF THIS COLD FRONT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR WEDNESDAY. KERN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1027 PM CDT TUE AUG 10 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1025 PM TSTM WND GST OFFUTT AFB 41.11N 95.92W
08/10/2010 M59 MPH SARPY NE TRAINED SPOTTER
&&
VDEWALDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1033 PM CDT TUE AUG 10 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1000 PM TSTM WND GST 2 S CEDAR CREEK 41.02N 96.10W
08/10/2010 E60 MPH CASS NE TRAINED SPOTTER
&&
VDEWALDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1034 PM CDT TUE AUG 10 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1032 PM TSTM WND GST OFFUTT AFB 41.11N 95.92W
08/10/2010 M74 MPH SARPY NE ASOS
&&
BKERNSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1054 PM CDT TUE AUG 10 2010 IAZ080-110445- MONTGOMERY IA- 1054 PM CDT TUE AUG 10 2010 ...SPECIAL WEATHER STATEMENT FOR EASTERN MONTGOMERY COUNTY UNTIL 1145 PM CDT... AT 1052 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM NEAR STANTON...OR 41 MILES NORTH OF TARKIO...MOVING NORTHEAST AT 20 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... VIKING LAKE STATE PARK... GRANT... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. DEWALD
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1055 PM CDT TUE AUG 10 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1014 PM HAIL 7 WNW PLATTSMOUTH 41.05N 96.02W
08/10/2010 E1.00 INCH CASS NE TRAINED SPOTTER
SEVERAL 2 TO 3 INCH DIAMETER TREE LIMBS DOWN. HAIL LASTED
FOR 5 MINUTES. 40 MPH MEASURED WIND SPEED.
&&
BKERNSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 1057 PM CDT TUE AUG 10 2010 IAZ069-110500- POTTAWATTAMIE IA- 1057 PM CDT TUE AUG 10 2010 ...SPECIAL WEATHER STATEMENT FOR EASTERN POTTAWATTAMIE COUNTY UNTIL MIDNIGHT CDT... AT 1052 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A CLUSTER OF STRONG THUNDERSTORMS NEAR TREYNOR...OR 24 MILES EAST OF OMAHA...MOVING NORTHEAST AT 20 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS AS THEY MOVE THROUGH EASTERN POTTAWATTAMIE COUNTY. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MACEDONIA... CARSON... OAKLAND... WALNUT... HANCOCK... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. DEWALD
The Omaha radar (KOAX), 63 km away, was scanning. The volume nearest the first event began at 04:06 UTC.
2 thunderstorm wind. Local standard time, as filed.
Thunderstorm wind gusts estimated at 60 mph downed or split several large trees in town along with causing other tree damage.
Thunderstorm wind gusts estimated at 60 mph downed a few tree limbs in town.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2010Every state in 2010This day in weather historyWarnings in Iowa, August 2010
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: 248488, 239812.