Thunderstorm Wind, Rock
- When
- July 28, 3:00 PM CST
- Where
- Rock County, 1 mi S of Jasper
- Measured
- 61 kt (70 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 43.833, -96.400
Damaging Wind in Minnesota, July 28, 2002
1 thunderstorm wind, as filed by the National Weather Service.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What forecasters said that day
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 28, 12:27 PM CST, 2 hours 33 minutes earlier.
Area forecast discussion, Jul 28, 12:27 PM CST, 2 hours 33 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 127 PM CDT SUN JUL 28 2002 ...MAIN FORECAST CHALLENGES DEAL WITH FIRST PERIOD SEVERE WEATHER... SYNOPSIS...MORNING SUBJECTIVE UPPER AIR ANALYSIS INDICATED NEXT WEATHER MAKER WAS MOVING THROUGH THE CNTRL ROCKIES. AT H3 60-70 KNT JET WAS DIVING DOWN THE BACK SIDE OF THE POSITIVLY TILTED TROUGH. MAIN SHORT WAVE/THERMAL TROUGH AT H5 WAS LOCATED OVR ERN WY AT 12Z. AT H85 WEAK HIGH WAS INDICATED OVER N CNTRL SD WITH TROUGH EXTENDING FROM NORTHERN MN SW INTO WESTERN NEB. LOW LEVEL DRY SLOT WAS NOTED PUSHING THROUGH CNTRL NEB WITH LESS THAN 5 DEGREE H85 DP AT KLBF. FORECAST...WEAK SFC LOW OVER EXTREME SE SD WILL SLOWLY MOVE TO THE EAST TONIGHT. THIS WILL DRAG A TROUGH/DRYLINE THROUGH THE CNTRL AND ERN CWA THROUGH THE EVENING. LATEST MODEL GUIDANCE INDICATES THAT ATMOSPHERE ALONG AND EAST OF THIS LOW WILL BECOME EXTREMELY UNSTABLE WITH MLCAPE OF 3000 J/KG. AS UPPER THROUGH MOVES INTO THE CNTRL PLAINS...MID/UPPER LEVEL WINDS ARE EXPECTED TO INCREASE THIS EVENING LEADING TO 40-50 KNT 0 TO 6 KM SHEAR. THUS ATMOSPHERE WILL SUPPORT SUSTAINED ORGANIZED SVR CONVECTION THROUGH THE EVENING HOURS. WITH GOOD LINEAR FORCING AND A WEAK CAPPING INVERSION...WOULD EXPECT A GOOD LINE OF STORMS TO GET GOING BY 3-4 PM. WITH -12 DEGREES AT H5 AND THE DEGREE OF INSTABILITY...WOULD EXPECT HAIL TO BE THE MAIN THREAT. MID LEVEL WINDS OF 40-50KNTS WILL ALSO BE EASILY MIXED TO THE SFC TO HAVE A DECENT DMG WND POTENTIAL. TORNADO POTENTIAL SEEMS VERY LOW AT THIS POINT DUE TO THE VEERED LOW LEVEL FLOW OVER MOST OF THE CWA. ONLY CHC WOULD BE IN SW MN AND EXTREME NORTHERN IA WHERE SFC WINDS WILL CONTINUED TO BE BACKED AHEAD OF SFC LOW. SPC MODERATE RISK LOOKS GOOD. STORMS CLEAR OUT OF CWA BY MIDNIGHT WITH CLEARING COMING INTO THE WESTERN ZONES. NEXT CHC FOR TRW WILL COME TO THE NORTH ON TUESDAY NIGHT. ZONAL FLOW ACROSS THE NORTHERN US WILL MAKE SHORT WAVE HARD TO TIME...BUT MODELS AGREE ON WEAK SFC LO AND BOUNDARY MOVING INTO THE NORTHERN CWA LATE TUESDAY. WILL CONTINUE TRW CHC FOR THE NORTH TUESDAY NIGHT WITH FRONT IN THE AREA AND LLJ DEVELOPING. STRONGER SHORT WAVE COMES THROUGH ON WEDNESDAY WHICH LOOKS TO BRING THE FRONT THROUGH THE WHOLE CWA WEDNESDAY NIGHT. GUIDANCE TEMPS LOOK IN THE BALL PARK AND WILL NOT MAKE MANY CHANGES. GRIDS/OZF WILL BE OUT EARLY WITH IMPENDING SEVERE WEATHER. .FSD...NONE BOUSTEAD
In the hours before
Special weather statement, Jul 28, 10:00 AM CST, 5 hours before
SIGNIFICANT WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 1100 AM CDT SUN JUL 28 2002 *** THIS SIGNIFICANT WEATHER OUTLOOK FROM THE NATIONAL WEATHER SERVICE PERTAINS ONLY TO CONDITIONS ASSOCIATED WITH THUNDERSTORMS. *** .SYNOPSIS... LOW PRESSURE OVER SOUTHEAST SOUTH DAKOTA WILL BE THE FOCUS FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOON INTO THE EVENING OVER SOUTHEAST SOUTH DAKOTA...SOUTHWEST MINNESOTA AND NORTHWEST IOWA. THE ATMOSPHERE WILL BE MOST UNSTABLE OVER EXTREME SOUTHEAST SOUTH DAKOTA...NORTHWEST IOWA..AND SOUTHWEST MINNESOTA LATE AFTERNOON AND EVENING. THIS AREA WILL HAVE THE GREATEST RISK OF SEVERE WEATHER...WITH LARGE HAIL THE MAIN THREAT. HOWEVER...DAMAGING WINDS AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE...ESPECIALLY ACROSS NORTHWEST IOWA AND PORTIONS OF SOUTHWEST MINNESOTA LATE AFTERNOON AND EVENING. THE SEVERE WEATHER THREAT SHOULD END ACROSS THE AREA AROUND MIDNIGHT. SDZ038>040-050-052>061-063>065-068-290500- BEADLE-KINGSBURY-BROOKINGS-JERAULD-SANBORN-MINER-LAKE-MOODY-BRULE- AURORA-DAVISON-HANSON-MCCOOK-GREGORY-CHARLES MIX-DOUGLAS-HUTCHINSON- BON HOMME- INCLUDING THE CITIES OF...HURON...BROOKINGS...CHAMBERLAIN...MITCHELL... 1100 AM CDT SUN JUL 28 2002 * FORECAST THROUGH MIDNIGHT: WIDELY SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP BY MID AFTERNOON...AND THEN END BY EARLY EVENING. THESE STORMS MAY PRODUCE LARGE HAIL. * SIGNIFICANT WEATHER: LARGE HAIL...DIME SIZE OR LARGER. * SPOTTER ACTIVATION: SPOTTER ACTIVATION IS POSSIBLE AFTER 4 PM. SDZ062-066-067-069>071-MNZ071-072-080-089-097-098-IAZ001-012-020- 031-NEZ013-014-290500- LINCOLN-LYON-PIPESTONE-MURRAY-MINNEHAHA-ROCK-NOBLES-TURNER-LINCOLN- LYON-YANKTON-CLAY-UNION-SIOUX-PLYMOUTH-DIXON-DAKOTA-WOODBURY- INCLUDING THE CITIES OF...PIPESTONE...SLAYTON...SIOUX FALLS...LUVERNE... WORTHINGTON...ROCK RAPIDS...YANKTON...VERMILLION...ELK POINT... SIOUX CENTER...LE MARS...SIOUX CITY... 1100 AM CDT SUN JUL 28 2002 * FORECAST THROUGH MIDNIGHT: NUMEROUS THUNDERSTORMS ARE EXPECTED TO DEVELOP BY MID AFTERNOON...AND CONTINUE INTO THE EARLY EVENING HOURS. THESE STORMS WILL BE CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS. * SIGNIFICANT WEATHER: SEVERE WINDS...GUSTS EQUAL TO OR GREATER THAN 58 MPH. LARGE HAIL...DIME SIZE OR LARGER. * SPOTTER ACTIVATION: SPOTTER ACTIVATION IS LIKELY AFTER 4 PM. MNZ081-090-IAZ002-003-013-014-021-022-032-290500- COTTONWOOD-JACKSON-OSCEOLA-DICKINSON-OBRIEN-CLAY-CHEROKEE-BUENA VISTA-IDA- INCLUDING THE CITIES OF...SPIRIT LAKE...SPENCER...STORM LAKE... 1100 AM CDT SUN JUL 28 2002 * FORECAST THROUGH MIDNIGHT: NUMEROUS THUNDERSTORMS ARE EXPECTED TO DEVELOP BY MID AFTERNOON...AND CONTINUE INTO THE LATE EVENING HOURS. THESE STORMS WILL BE CAPABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS...AND VERY HEAVY RAIN. * SIGNIFICANT WEATHER: SEVERE WINDS...GUSTS EQUAL TO OR GREATER THAN 58 MPH. LARGE HAIL...DIME SIZE OR LARGER. HEAVY RAIN. * SPOTTER ACTIVATION: SPOTTER ACTIVATION IS LIKELY AFTER 4 PM.
Local storm report, Jul 28, 11:45 AM CST, 3 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1245 PM CDT SUN JUL 28 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1235 PM 9 SSE HURON SD .75 INCH HAIL
07/28/02 BEADLE REPORTED BY STORM
SPOTTER.Local storm report, Jul 28, 2:09 PM CST, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
309 PM CDT SUN JUL 28 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0105 PM IROQUOIS SD .75 INCH HAIL
07/28/02 KINGSBURY REPORTED BY STORM
SPOTTER.
0140 PM 4 S LAKE PRESTON SD 4.5 INCH HAIL
07/28/02 KINGSBURY REPORTED BY LAW
ENFORCEMENT OFFICIAL.
WINDOWS BROKEN IN HOMES
AND CARS.
0201 PM 2 N OLDHAM SD 1.75 INCH HAIL
07/28/02 KINGSBURY REPORTED BY LAW
ENFORCEMENT OFFICIAL.
0215 PM SINAI SD TORNADO
07/28/02 BROOKINGS REPORTED BY EMERGENCY
MANAGEMENT. STRUCTURE
DAMAGE NEAR SINAI.
0250 PM 5 NW WARD SD 60 MPH TSTM GUST
07/28/02 MOODY REPORTED BY STORM
SPOTTER.Local storm report, Jul 28, 2:47 PM CST, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
347 PM CDT SUN JUL 28 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0307 PM PIPESTONE MN 60 MPH TSTM GUST
07/28/02 PIPESTONE REPORTED BY STORM
SPOTTER.
0310 PM FLANDREAU SD 60 MPH TSTM GUST
07/28/02 MOODY REPORTED BY STORM
SPOTTER.
0319 PM FLORENCE MN 2.75 INCH HAIL
07/28/02 LYON REPORTED BY LAW
ENFORCEMENT OFFICIAL.
0325 PM DELL RAPIDS SD 1 INCH HAIL
07/28/02 MINNEHAHA REPORTED BY HAM RADIO
OPERATOR.
0327 PM DELL RAPIDS SD 1.75 INCH HAIL
07/28/02 MINNEHAHA REPORTED BY PUBLIC.The radar
The Sioux Falls radar (KFSD), 38 km away, was scanning. The volume nearest the first event began at 20:58 UTC.
Event by event
1 thunderstorm wind. Local standard time, as filed.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heat in Maryland, July 28 to 29, 2002
- Heat in Pennsylvania, July 28 to 30, 2002
- Heat in Maryland, July 28 to 30, 2002
- Tornado in New York, July 28, 2002
- Damaging Wind in South Dakota, July 28, 2002
- Hail and Damaging Winds in Kansas, July 28, 2002
- Hail in South Dakota, July 28, 2002
- Damaging Wind in New York, July 28, 2002
- Hail and Damaging Wind in South Dakota, July 28, 2002
- Damaging Winds in Ohio, July 28, 2002
- Tornado and Hail in Michigan, July 28, 2002
- Hail and Damaging Winds in New York, July 28, 2002
More
Every storm in Minnesota in 2002Every state in 2002This day in weather historyWarnings in Minnesota, July 2002
Sources
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: 5309865.