A severe thunderstorm produced damaging winds over southwest Williams County in northwest North Dakota during the late morning hours of July 8th. One structure was destroyed due to the high winds.
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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 BIS wrote it up.
A severe thunderstorm produced damaging winds over southwest Williams County in northwest North Dakota during the late morning hours of July 8th. One structure was destroyed due to the high winds.
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 Bismarck, ND wrote its last area forecast discussion before the first event at Jul 8, 2:30 AM CST, 7 hours 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BISMARCK ND 330 AM CDT WED JUL 8 2009 .SHORT TERM...TODAY THROUGH FRIDAY NIGHT... MAIN CONCERN IN THE SHORT TERM IS THE IMPENDING WIDESPREAD SEVERE WEATHER EVENT LATER THIS AFTERNOON WEST...AND OVERSPREADING CENTRAL AND EASTERN SECTIONS TONIGHT. LATEST STORM PREDICTION CENTER FORECAST KEEPS A SLIGHT RISK OVER NORTH DAKOTA BUT MAY UPGRADE LATER TODAY. USED A BLEND OF NAM/GFS/ECMWF/NCEP 4KM WRF COMPOSITE REFLECTIVITY FORECAST...AND PREVIOUS FORECAST. MODELS FAIRLY SIMILAR IN OVERALL EVOLUTION OF THUNDERSTORMS...HOWEVER IT IS WORTH NOTING THE 4KM WRF HOLDS BACK THE LEADING EDGE/PUSH OF SEVERE WEATHER ACROSS SOUTHWESTERN NORTH DAKOTA UNTIL 03Z...THEN RAPIDLY EXPLODES THIS AREA THEREAFTER AS IT MOVES NORTHEAST. THE NAM/GFS DEVELOP THE INITIAL SURGE OF PRECIPITATION ACROSS THE WEST AND SOUTHWEST A FEW HOURS EARLIER THAN THE WRF. THE LATEST WATER VAPOR IMAGERY SHOWS SEVERAL UPPER LOW CENTERS ROTATING OVER THE PACIFIC NORTHWEST. A H3 100KT JET STREAK WAS STRETCHING FROM NORTHERN CALIFORNIA INTO EASTERN OREGON/SOUTHWESTERN IDAHO AT THIS TIME. LATEST MSAS SURFACE PLOT SHOWS A 1016MB HIGH PRESSURE OVER NORTH CENTRAL NORTH DAKOTA PROVIDING FOR A LIGHT EASTERLY FLOW. CURRENT FOG/STRATUS LOOP SHOWS SEVERAL AREAS OF STRATUS ESPECIALLY OVER THE SOUTHWEST. WILL METWATCH THIS AND UPDATE SKY GRIDS THROUGH PUBLISHING TIME. ALSO...A 1003MB SURFACE LOW WAS LOCATED OVER CENTRAL WYOMING WITH AN INVERTED TROUGH SIGNATURE POKING INTO SOUTH CENTRAL MONTANA. SHOWERS/THUNDERSTORMS WERE OCCURRING IN THE VICINITY OF THIS TROUGH AND PUSHING OVER EASTERN MONTANA...AND SOON INTO OUR WESTERN/SOUTHWESTERN ZONES. THE 4KM WRF VERIFIES THIS TREND AND GRADUALLY WEAKENS IT AS IT MOVES INTO SOUTHCENTRAL NORTH DAKOTA BY LATE MORNING. AFTER THIS INITIAL AREA OF PRECIPITATION MOVES THROUGH EARLY TODAY...ATTENTION THEN TURNS TO THE POTPOURRI OF SEVERE WEATHER DEVELOPING LATE THIS AFTERNOON AND TONIGHT. LATEST DATA SUGGESTS THAT LARGE HAIL AND ISOLATED TORNADOES WILL INITIALLY BE THE MAIN THREATS ESPECIALLY OVER SOUTHWEST NORTH DAKOTA...TRANSITIONING TO LARGE HAIL/DAMAGING WINDS OVERNIGHT. HEAVY RAIN WILL ACCOMPANY THESE THUNDERSTORMS WITH MODELS AND HPC ADVERTISING BETWEEN 1 AND 2 INCHES OF RAIN OVER MOST OF SOUTHERN NORTH DAKOTA TONIGHT. LARGE SCALE ASCENT ASSOCIATED WITH THE AFOREMENTIONED UPPER JET WILL PROVIDE FOR A VERY QUICK INTENSIFICATION/RAPID DEVELOPMENT OF THE SURFACE LOW AND FRONTAL FEATURES AROUND 00Z AND BEYOND. CONSEQUENTLY WILL SEE A RAPID DEVELOPMENT OF SEVERE WEATHER FROM SOUTHWEST TO NORTHEAST WITHIN A AN HOUR OR TWO THIS EVENING AND THIS WILL CONTINUE THROUGH ABOUT 10Z BEFORE SHIFTING INTO EASTERN NORTH DAKOTA. A DRIER AIR MASS/LOWER DEW POINTS WILL OVERSPREAD THE CWA THURSDAY AS A WESTERLY FLOW DEVELOPS BEHIND THE EXITING UPPER TROUGH. EXPECTING A MOSTLY SUNNY/DRY/BREEZY AFTERNOON WITH WEST/NORTHWEST WINDS OF 15 TO 25 MPH AND HIGHS RANGING FROM 75F TO 85F. A REINFORCEMENT OF DRY/COOLER AIR WILL EMERGE OVER SOUTHERN CANADA AND SEND A COLD FRONT THROUGH FRIDAY AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS WILL ACCOMPANY THIS FRONT. SKIES CLEAR FRIDAY NIGHT WITH LOWS SATURDAY MORNING RANGING FROM THE 45F TO 55F. .LONG TERM...SATURDAY THROUGH TUESDAY... THE WEEKEND ENDS WITH THE SUBTROPICAL RIDGE WELL IN PLACE OVER NORTHERN TEXAS...A CLOSED LOW OFF THE NORTHERN PACIFIC COAST...AND ANOTHER STRONG LOW MOVING ACROSS THE HUDSON BAY. THE SETUP PLACES STRONG NORTHWEST FLOW OVER NORTH DAKOTA...WITH HIGH PRESSURE AT THE SURFACE DUE TO NORTHWARD EXTENSION OF THE RIDGE TO THE SOUTH. HOWEVER...WITH THE STRONG FLOW ALOFT...SHORT WAVE IMPULSES WILL MOST CERTAINLY TRAVERSE THE FORECAST AREA. TIMING PREDICTABILITY IS UNCERTAIN...SO WILL LEAVE POPS AS I INHERITED THEM...20-30 PERCENT BROADBRUSH. LATE SUNDAY...THE PACIFIC CLOSED LOW FINALLY KICKS TO THE EAST. BOTH THE GFS AND ECMWF AGREE WITH TIMING...ALTHOUGH THE EUROPEAN MOVES THE LOW ALONG THE INTERNATIONAL BORDER AND THE GFS MOVES THE LOW SLIGHTLY FARTHER SOUTH. EITHER WAY...EXPECT PRECIP CHANCES IN THE FORECAST AREA TO INCREASE FOR LATE MONDAY AS THE LOW MOVES EAST. EXPECT TEMPERATURES TO REMAIN AROUND NORMAL FOR MID JULY WITH A DAILY CHANCE OF THUNDERSTORMS OVER MUCH OF THE FORECAST AREA. && .AVIATION... PATCHY FOG AND LOW CLOUD WEST WILL BURN OFF / LIFT WITH DAYTIME HEATING. THERE IS THE RISK FOR THUNDERSTORMS...SOME SEVERE...ACROSS THE FORECAST AREA TODAY. ISOLATED THUNDERSTORMS IN EASTERN MONTANA WILL BE MOVING THROUGH WESTERN NORTH DAKOTA THIS WEDNESDAY MORNING. THEY SHOULD NOT BE SEVERE...AND SHOULD WEAKEN AS THEY MOVE INTO MORE STABLE AIR OVER CENTRAL NORTH DAKOTA. MORE THUNDERSTORMS...SOME SEVERE...ARE FORECAST TO REDEVELOP IN EASTERN MONTANA THIS AFTERNOON AND MOVE INTO WESTERN NORTH DAKOTA THIS EVENING AND OVERNIGHT. A LARGE HAIL...HIGH WIND...AND ISOLATED TORNADO THREAT FROM SUPERCELL STORMS...WILL EVOLVE INTO A HIGH WIND THREAT AS THE STORMS FORM INTO LINES AND RACE EAST. && .BIS WATCHES/WARNINGS/ADVISORIES... NONE. && KS/JPM/BPN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BISMARCK ND 515 AM CDT WED JUL 8 2009 NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-091015- DIVIDE-BURKE-RENVILLE-BOTTINEAU-ROLETTE-WILLIAMS-MOUNTRAIL-WARD- MCHENRY-PIERCE-MCKENZIE-DUNN-MERCER-OLIVER-MCLEAN-SHERIDAN-WELLS- FOSTER-GOLDEN VALLEY-BILLINGS-STARK-MORTON-BURLEIGH-KIDDER- STUTSMAN-SLOPE-HETTINGER-GRANT-BOWMAN-ADAMS-SIOUX-EMMONS-LOGAN- LA MOURE-MCINTOSH-DICKEY- 515 AM CDT WED JUL 8 2009 /415 AM MDT WED JUL 8 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL NORTH DAKOTA...NORTHWEST NORTH DAKOTA...SOUTH CENTRAL NORTH DAKOTA...SOUTHEAST NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA. .DAY ONE...TODAY AND TONIGHT SEVERE THUNDERSTORMS ARE ANTICIPATED THIS AFTERNOON THROUGH TONIGHT. A DEVELOPING LOW PRESSURE CENTER IN NORTHEASTERN WYOMING WILL STRENGTHEN AND MOVE EAST INTO SOUTH DAKOTA TONIGHT. A WARM FRONT SOUTH OF NORTH DAKOTA AND A COLD FRONT WEST OF NORTH DAKOTA WILL BRING SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS...FREQUENT LIGHTNING...AND HEAVY RAINFALL. EXPECT SHOWERS AND THUNDERSTORMS TO DEVELOP IN WESTERN AND SOUTHWESTERN NORTH DAKOTA THIS AFTERNOON AND THEN RAPIDLY STRENGTHEN AND SPREAD NORTHEAST BY SUNSET. THESE THUNDERSTORMS WILL CONTINUE WELL AFTER MIDNIGHT BUT SHOULD BE EAST OF THE FORECAST AREA JUST BEFORE SUNRISE THURSDAY. ONE TO TWO INCHES OF RAIN CAN BE EXPECTED OVER MOST OF CENTRAL AND SOUTHERN NORTH DAKOTA. THE STORM PREDICTION CENTER CURRENTLY HAS NORTH DAKOTA IN A SLIGHT RISK FOR SEVERE WEATHER...BUT THAT COULD BE UPGRADED LATER TODAY. PLEASE CHECK BACK FOR FURTHER UPDATES. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY...ALTHOUGH NOT EXPECTING TO BE SEVERE AT THIS TIME. THERE IS A CHANCE FOR THUNDERSTORMS LATE MONDAY THROUGH TUESDAY OF NEXT WEEK. SOME OF THESE THUNDERSTORMS COULD BE SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS ANTICIPATED THIS AFTERNOON AND EVENING IN THE WEST...THEN OVERNIGHT ACROSS THE CENTRAL AND EAST. SPOTTERS ARE ENCOURAGED TO REPORT SEVERE WEATHER EITHER DIRECTLY TO THE NATIONAL WEATHER SERVICE OR TO LOCAL LAW ENFORCEMENT. KS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1113 AM CDT WED JUL 8 2009 NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-081815- DIVIDE-BURKE-RENVILLE-BOTTINEAU-ROLETTE-WILLIAMS-MOUNTRAIL-WARD- MCHENRY-PIERCE-MCKENZIE-DUNN-MERCER-OLIVER-MCLEAN-SHERIDAN-WELLS- FOSTER-GOLDEN VALLEY-BILLINGS-STARK-MORTON-BURLEIGH-KIDDER- STUTSMAN-SLOPE-HETTINGER-GRANT-BOWMAN-ADAMS-SIOUX-EMMONS-LOGAN- LA MOURE-MCINTOSH-DICKEY- INCLUDING THE CITIES OF...CROSBY...BOWBELLS...MOHALL... BOTTINEAU...ROLLA...WILLISTON...NEW TOWN...MINOT...TOWNER... RUGBY...WATFORD CITY...KILLDEER...BEULAH...HAZEN...CENTER... GARRISON...MCCLUSKY...HARVEY...CARRINGTON...BEACH...MEDORA... DICKINSON...MANDAN...BISMARCK...STEELE...JAMESTOWN...MARMARTH... MOTT...ELGIN...BOWMAN...HETTINGER...FORT YATES...LINTON... NAPOLEON...EDGELEY...ASHLEY...OAKES 1113 AM CDT WED JUL 8 2009 /1013 AM MDT WED JUL 8 2009/ ...FLASH FLOODING POSSIBLE TONIGHT WITH SEVERE WEATHER... IN ADDITION TO THE WELL PUBLICIZED RISK OF SEVERE WEATHER INCLUDING ISOLATED TORNADOES...DESTRUCTIVE WINDS IN EXCESS OF 70 MPH...AND LARGE HAIL UP TO BASEBALL SIZE...THERE IS A THREAT OF FLASH FLOODING ACROSS MUCH OF WESTERN AND CENTRAL NORTH DAKOTA. LOW LYING FLOOD PRONE REGIONS AND URBAN AREAS ARE THE MOST AT RISK...SINCE UP TO 1 TO 2 INCHES OF RAIN ARE POSSIBLE IN A RATHER SHORT AMOUNT OF TIME. IF YOU ARE IN A FLOOD PRONE AREA...PLEASE TAKE NECESSARY PRECAUTIONS NOW TO PROTECT LIFE AND PROPERTY. REMEMBER...DO NOT DRIVE INTO FLOOD WATERS...ESPECIALLY AT NIGHT...SINCE THE ROAD UNDERNEATH MAY NO LONGER BE STABLE. SCHECK
The national radar mosaic for the moment the first event began.
1 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm wind gust resulted in the destruction of a storage pole barn.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Dakota in 2009Every state in 2009This day in weather historyWarnings in North Dakota, July 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: 186504.