Thunderstorms formed during the early morning hours in northeast Nebraska along a sharp instability gradient . These storms continued to move southeast into east central Nebraska around sunrise.
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.
Thunderstorms formed during the early morning hours in northeast Nebraska along a sharp instability gradient . These storms continued to move southeast into east central Nebraska around sunrise. Steep mid level lapse rates and moderate deep layer shear were sufficient to produce isolated hail and wind damage, along with heavy rain.
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 6, 3:16 AM CST, 2 hours 44 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 416 AM CDT TUE AUG 6 2013 .DISCUSSION... SHORT TERM CONCERNS WILL BE MORNING CONVECTION AND THEN AFTERNOON AND EVENING CONVECTION/SEVERE WEATHER POTENTIAL. DUE TO MORNING CONVECTION...WILL LIKELY NEED TO RE-VISIT THE FORECAST EARLY THIS MORNING. WATER VAPOR SATELLITE IMAGERY AND LIGHTNING DATA CONTINUED TO SHOW TROPICAL MOISTURE STREAMING NORTHWARD ACROSS MEXICO INTO THE FOUR CORNERS REGION AND INTO THE PLAINS AND THEN SOUTHEAST TOWARD THE LOWER MISSISSIPPI VALLEY AROUND THE LARGE H5 HIGH PRESSURE AREA CENTERED IN WEST TEXAS. THE H5 CANADIAN LOW WAS STILL CENTERED NEAR CHURCHILL BY HUDSON/S BAY WITH A TROF TRAILING BACK TOWARD WASHINGTON STATE. SHORTWAVES WERE OVER MONTANA/WYOMING AND KANSAS WITH CONVECTION ASSOCIATED WITH THESE FEATURES. CHANGES FROM A DAY AGO...SHOWED THAT THE H7 TEMPERATURES HAVE WARMED. OMA WAS AT +12C WITH +14C WIDESPREAD ACROSS KANSAS. PER THE SPC MESOANALYSIS...THE LARGE H7 +10C DEWPOINTS HAD SHIFT FROM EASTERN KS TO CENTRAL AND PARTS OF WESTERN KS. H85 DEWPOINTS HAD WERE STILL QUITE HIGH WITH WIDESPREAD +14 TO +18 FOR PARTS OF THE ROCKIES AND A LARGE AREA FROM THE GULF NORTH THROUGH OK/KS INTO NEB. EARLY THIS MORNING...THE MAIN FOCUS FOR THE LOW LEVEL JET WAS FROM THE DAKOTAS INTO MINNESOTA AND FROM KANSAS INTO MISSOURI AND BY 4AM...THERE WAS GOOD DEVELOPMENT SOUTHWARD INTO NORTH CENTRAL NEBRASKA...ALONG THE INSTABILITY GRADIENT AND WHERE MID LEVEL LAPSE RATES WERE QUITE STEEP. THE GFS DID A GOOD JOB WITH THE CONVECTION COMPARED TO THE OTHER MODELS AND HAS MOST OF IT THRU BY 12Z...HOWEVER THE NAM HOLDS ON TO SHOWERS AND THUNDERSTORMS THROUGH 15Z. THE CONVECTION HAS BEEN MAKING IT FARTHER NORTH OR SOUTH THAN THE MODELS HAVE BEEN PROJECTING THE LAST COUPLE OF DAYS. THE SHORT RANGE MODELS HAVE A TOUGH TIME WITH THESE COMPLEXES...AND THE EXTENT IS ALWAYS DIFFICULT TO PIN DOWN. DID INCREASE POPS ACROSS NORTHEAST AND EAST CENTRAL NEBRASKA INTO WEST CENTRAL IOWA THIS MORNING. WILL CONTINUE TO MONITOR SHORT TERM RADAR TRENDS FOR MORNING UPDATES. NAM/GFS/4KM WRF PROGS ARE CONSISTENT IN BRINGING LIKELY POPS INTO NORTHEAST NEBRASKA THROUGH 00Z ESPECIALLY NORTH OF A LINE FROM OLU-SUX WITH THE COLD FRONT...HOWEVER ARE A LITTLE SLOWER TO BRING IT SOUTH AND TO END AND NOT AS ROBUST WITH THE PRECIPITATION. FEEL THERE ARE GOOD PARAMETERS IN PLACE THERMALLY/DYNAMICALLY AND MOISTURE-WISE AND WILL INCLUDE HIGH POPS IN THE NORTH AND TAPER TO CHANCE IN SOUTHEAST NEBRASKA THROUGH 00Z...THEN SHIFT LIKELY POPS SOUTHWARD WITH THE FRONT AFTER 00Z...DECREASING FROM NORTH TO SOUTH AFTER 06Z. DEPENDING ON HOW THE ONGOING CLUSTER OF THUNDERSTORMS DEVELOPS CLOUDS WILL AGAIN AFFECT TEMPERATURES AND INSTABILITY. AHEAD OF THE FRONT...DESTABILIZATION WITH CAPES OF 2500-3500J/KG AND DEEP LAYER SHEAR INCREASING TO 40-50KTS AND ABUNDANT MOISTURE SHOULD PROVIDE SUPPORT FOR MULTIPLE TSTORM MODES. A 50KT SPEED MAX FROM FROM SD INTO IA COULD ENHANCE THE WIND THREAT. HAIL...DAMAGING WINDS AND HEAVY RAIN WILL BE THE PRIMARY HAZARDS...HOWEVER AN ISOLD TORNADO IS ALSO POSSIBLE. HAVE LEFT WEDNESDAY DRY...WITH PRECIPITATION CHANCES MOVING NORTHWARD FOR THURSDAY. THE GFS/EC ARE MORE AGGRESSIVE WITH A SHORTWAVE TROF AND RETURN OF MOISTURE AND A FRONT IN THE AREA. TIME SECTIONS/FORECAST SOUNDING ARE PRETTY ROBUST HOWEVER LOW LEVEL DRY AIR WILL NEED TO BE OVERCOME. ONCE THE SYSTEM MOVES OUT OF THE AREA FRIDAY IT SHOULD BE DRY FRIDAY NIGHT. TEMPERATURES STILL LOOK AT OR BELOW NORMAL FRIDAY THROUGH MONDAY. A DEEPENING LONGWAVE TROF FROM CANADA INTO THE PLAINS SHOULD BRING CHANCE FOR SHOWERS AND THUNDERSTORMS TO THE FORECAST AREA SATURDAY NIGHT THROUGH SUNDAY NIGHT. && .AVIATION... 06Z TAFS FOR KOMA...KLNK...KOFK. HIGH LEVEL CLOUDS SHOULD THIN DURING THE OVERNIGHT HOURS. STILL EXPECT SOME DECREASE IN CEILINGS...EXPECIALLY AT KOFK. WIDESPREAD IFR CONDITIONS DO NOT LOOK QUITE AS LIKELY AS THEY DID 6 HOURS AGO FOR KOMA AND KLNK. IF THEY DEVELOP...IFR CONDITIONS COULD LAST UNTIL 8 OR 9 AM. TSRA COULD AFFECT KOFK BY EARLY AFTERNOON...WITH TSRA POSSIBLE AT BOTH KOMA AND KLNK IN THE LATE AFTERNOON AND EVENING TUESDAY. JUST WENT WITH MVFR CONDITIONS WITH PROB30 GROUPS TUESDAY FOR NOW. MILLER && .OAX WATCHES/WARNINGS/ADVISORIES... NE...NONE. IA...NONE. && ZAPOTOCNY
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 630 AM CDT TUE AUG 6 2013 IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034- 042>045-050>053-065>068-078-088>093-070130- 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- 630 AM CDT TUE AUG 6 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST NEBRASKA AND SOUTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL PUSH ACROSS NORTHEAST AND PARTS OF EAST CENTRAL NEBRASKA INTO WEST CENTRAL IOWA THIS MORNING. THE ISOLATED STORMS MAY BE SEVERE WITH DAMAGING WINDS AND LARGE HAIL ALONG WITH PERIODS OF HEAVY RAIN POSSIBLE WITH THE STORMS. THIS AFTERNOON AND TONIGHT SEVERE THUNDERSTORMS WILL AGAIN BE POSSIBLE WITH DAMAGING WINDS...LARGE HAIL AND HEAVY RAINFALL THE PRIMARY HAZARDS...HOWEVER AN ISOLATED TORNADO CANNOT BE RULED OUT. A CLUSTER OF THUNDERSTORMS THAT ORIGINATED IN WESTERN SOUTH DAKOTA HAVE CONTINUED DEVELOP EARLY THIS MORNING ALONG AN INSTABILITY GRADIENT AND AN AREA OF DEEP MOISTURE. THESE SHOULD WEAKEN LATER THIS MORNING. AN UPPER LEVEL WEATHER DISTURBANCE...COMBINED WITH A COLD FRONT AND HOW MUCH HEATING WE GET THIS AFTERNOON WILL SET THE STAGE FOR THUNDERSTORM REDEVELOPMENT THIS AFTERNOON AND TONIGHT...SOME OF WHICH MAY BE SEVERE. LOCALLY DENSE FOG CAN BE EXPECTED THIS MORNING FOR PARTS OF SOUTHWEST IOWA...LIFTING AFTER 9AM. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE CHANCE OF STORMS WILL RETURN TO SOUTHEAST NEBRASKA WEDNESDAY NIGHT THROUGH FRIDAY AND FOR MUCH OF THE AREA SATURDAY NIGHT INTO MONDAY. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION MAY BE REQUIRED TODAY AND TONIGHT. ZAPOTOCNY
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
430 AM CDT TUE AUG 6 2013
NEZ011-016-061015-
ANTELOPE NE-KNOX NE-
430 AM CDT TUE AUG 6 2013
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ANTELOPE AND
SOUTHWESTERN KNOX COUNTIES UNTIL 515 AM CDT...
AT 425 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR PAGE...OR 17 MILES EAST OF ONEILL...MOVING
NORTHEAST AT 10 MPH.
HAIL UP TO THE SIZE OF DIMES AND WIND GUSTS UP TO 40 MPH WILL BE
POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
RURAL AREAS OF THE MENTIONED AREA.
LAT...LON 4258 9823 4259 9820 4251 9805 4236 9802
4229 9830 4253 9831
TIME...MOT...LOC 0925Z 239DEG 10KT 4239 9833
DEWALDSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 551 AM CDT TUE AUG 6 2013 NEZ043-044-061115- DODGE NE-COLFAX NE- 551 AM CDT TUE AUG 6 2013 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN DODGE AND NORTHERN COLFAX COUNTIES UNTIL 615 AM CDT... AT 549 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR HOWELLS...OR 23 MILES NORTHEAST OF COLUMBUS...MOVING SOUTHEAST AT 15 MPH. HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... DODGE...HOWELLS AND SNYDER. LAT...LON 4174 9701 4174 9666 4146 9684 4161 9713 TIME...MOT...LOC 1049Z 302DEG 15KT 4165 9699 DEWALD
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
642 AM CDT TUE AUG 6 2013
NEZ031-032-042-061215-
STANTON NE-MADISON NE-PLATTE NE-
642 AM CDT TUE AUG 6 2013
...SIGNIFICANT WEATHER ADVISORY FOR STANTON...MADISON AND PLATTE
COUNTIES UNTIL 715 AM CDT...
AT 640 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES
SOUTHEAST OF NORFOLK TO ST. EDWARD...OR ALONG A LINE EXTENDING FROM
54 MILES SOUTHWEST OF PONCA TO 25 MILES NORTHWEST OF COLUMBUS...AND
MOVING SOUTHEAST AT 35 MPH.
HAIL UP TO THE SIZE OF DIMES AND WIND GUSTS UP TO 40 MPH WILL BE
POSSIBLE WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
MADISON...STANTON...NEWMAN GROVE...PLATTE CENTER...LINDSAY...
CRESTON...HUMPHREY...TARNOV AND CORNLEA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
&&
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1200 PM CDT
TUESDAY AFTERNOON.
LAT...LON 4178 9783 4203 9742 4193 9703 4174 9719
4174 9725 4167 9725 4154 9736 4152 9781
4154 9783
TIME...MOT...LOC 1140Z 303DEG 30KT 4195 9736 4162 9779
DEWALDThe Omaha radar (KOAX), 20 km away, was scanning. The volume nearest the first event began at 11:58 UTC.
1 hail, 1 thunderstorm wind, 1 flash flood. Local standard time, as filed.
Hail up to the size of quarters fell in northwest Fremont. Most of the hail was pea size and was very brief.
The roof of a building was blown off near the Cargil plant east of Blair. In addition, several trees were reported down throughout the city of Blair.
Rainfall from heavy thunderstorms created areas of street flooding across the city of Fremont. A thunderstorm dropped about 1.80 inches in less than an hour followed by a second storm less than an hour later. This second storm dropped about 0.50 inches in less than an hour. Many intersections in town were under water.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2013Every state in 2013This day in weather historyWarnings in Nebraska, August 2013
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: 458385, 458386, 458382.