1 thunderstorm wind, as filed by the National Weather Service.
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 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 Sioux Falls, SD wrote its last area forecast discussion before the first event at Jul 21, 2:23 AM CST, 12 minutes earlier.
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA NATIONAL WEATHER SERVICE SIOUX FALLS SD 323 AM CDT THU JUL 21 2005 .DISCUSSION... ONGOING CONVECTION OVER SOUTHEASTERN CWA CONTINUES FOLLOW SFC WARM FRONT TO THE SOUTHEAST. SOME CONCERN THAT SOME MID LEVEL CONVECTION COULD FIRE NORTH AND WEST OF THIS AREA...BUT MRR PROFILER NOW LIGHT NORTH AND LOOKING AT MCK AND FRB PROFILERS THE LLJ SEEMS TO BE FOCUSING MORE INTO SOUTHERN AND EASTERN NE. AS THIS CONVECTION SHIFTS SOUTHEAST...SFC FRONT SHOULD DROP SOUTH...AND BOTH THE GFS AND ETA PEG THE FRONT SOUTH OF INTERSTATE 80 LATE THIS AFTERNOON. SO...ORGANIZED SEVERE THREAT SHOULD ALSO SHIFT SOUTH AND EAST TOWARDS THIS. MODELS ALSO BOTH CONSISTENT ON TRYING TO RETURN JUICY AIR AND SFC FRONT INTO SOUTHERN CWA ON FRIDAY AFTERNOON. MAJOR PROBLEM HERE WILL BE FIGHTING A +14 TO +15 CAP AT 700MB. BOTH MODELS ALSO LINGERING FRONT AROUND CWA INTO SATURDAY AFTERNOON WITH A FAIRLY FAVORABLE LLJ FOR POTENTIAL BACK BUILDING THUNDERSTORMS. THEN...WELL ADVERTISED FRONT COMING THROUGH ON MONDAY...WITH DRY...COOLER AND LOWER HUMIDITY CONDITIONS TUESDAY THROUGH THURSDAY. OVERALL...OFF AND ON CHANCES FOR THUNDERSTORMS THROUGH MONDAY. AS FOR TEMPERATURES...VERY DEPENDANT ON THUNDERSTORM ACTIVITY AND BOUNDARY LOCATION. FOR NOW...WILL KEEP WARM TEMPERATRUES GOING AND INCREASE DEW POINTS AS MODELS BOTH HINTING THAT SFC BOUNDARY WILL BE NEARBY THROUGH THE WEEKEND...WHICH SHOUDL AID IN MOISTURE POOLING. WILL NEED TO WATCH FOR THE POTENTIAL FOR A HEAT ADVISORY ON ONE OR MORE DAYS AS WELL. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && 08
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 931 PM CDT WED JUL 20 2005 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-211200- AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA- CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE- DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON- IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN- LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN- OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN- SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON- 931 PM CDT WED JUL 20 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... SCATTERED THUNDERSTORMS SHOULD DEVELOP AND MOVE EAST ACROSS THE AREA...ESPECIALLY SOUTH OF INTERSTATE 90 FROM LATE THIS EVENING THROUGH OVERNIGHT. THE BEST CHANCE OF ANY SEVERE STORMS SHOULD BE ALONG THE MISSOURI VALLEY IN SOUTH DAKOTA INTO NORTHWEST IOWA AFTER MIDNIGHT. THE PRIMARY THREAT WOULD BE STRONG THUNDERSTORM WINDS...EITHER FROM DOWNBURSTS OR OUTFLOW BOUNDARIES. DUE TO VERY WARM AIR IN THE MID LEVELS OF THE ATMOSPHERE...THE LARGE HAIL THREAT IS MINIMAL...ALTHOUGH HAIL UP TO THE SIZE OF NICKELS CANNOT BE RULED OUT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY WEAK LOW PRESSURE MOVING ACROSS THE AREA FROM THE NORTHWEST MAY BRING SCATTERED THUNDERSTORMS THURSDAY NIGHT. ISOLATED STORMS MAY PRODUCE LARGE HAIL OR DAMAGING WINDS. VERY WARM AND HUMID WEATHER IS EXPECTED SATURDAY WITH THE HEAT INDEX POSSIBLY RISING TO ABOVE 100 IN NORTHWEST IOWA AND MUCH OF SOUTHEAST SOUTH DAKOTA. THE HEAT INDEX COULD RISE TO AROUND 105 NEAR THE MISSOURI RIVER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE POSSIBLE AFTER 11 PM CDT ALONG THE MISSOURI VALLEY IN SOUTH DAKOTA...AND IN FAR NORTHEAST NEBRASKA AND NORTHWEST IOWA AFTER 2 AM CDT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.CRH.NOAA.GOV/FSD. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK. RSR
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 203 AM CDT THU JUL 21 2005 IAZ020-031-NEZ013-014-SDZ068>071-210725- BON HOMME-CLAY-DAKOTA NE-DIXON NE-PLYMOUTH IA-UNION-WOODBURY IA- YANKTON- 203 AM CDT THU JUL 21 2005 ...SEVERE THUNDERSTORM WATCH NUMBER 653 HAS BEEN CANCELLED... THE THREAT OF SEVERE WEATHER HAS MOVED OUT OF SOUTHEAST SOUTH DAKOTA...FAR NORTHWEST IOWA AND NORTHEAST NEBRASKA. THEREFORE...THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED.
The Sioux Falls radar (KFSD), 112 km away, was scanning. The volume nearest the first event began at 08:36 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds caused tree damage, including several trees blown down. One tree fell on and damaged a house. A pipe was impaled into the wall of a house. The winds also destroyed a small shed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2005Every state in 2005This day in weather historyWarnings in Minnesota, July 2005
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: 5465387.