Thunderstorm Wind, Custer
- When
- July 20, 7:32 PM MST
- Where
- Custer County, 6 mi E of Custer
- Measured
- 61 kt (70 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 43.767, -103.483
Damaging Wind in South Dakota, July 20, 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 Rapid City, SD wrote its last area forecast discussion before the first event at Jul 20, 6:22 PM MST, 1 hour 10 minutes earlier.
Area forecast discussion, Jul 20, 6:22 PM MST, 1 hour 10 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 722 PM MDT SAT JUL 20 2002 THE FORECAST WAS UPDATED TO MENTION LOCALLY HEAVY RAINFALL ACROSS SOUTHWESTERN AND SOUTH-CENTRAL SD...OTHERWISE NO MAJOR CHANGES WERE MADE. TONIGHT IS AGAIN QUITE SIMILAR TO LAST NIGHT...EXCEPT THAT THE MOISTURE AND INSTABILITY AXES ARE SHIFTED SLIGHTLY EASTWARD. THE MAIN THUNDERSTORM CLUSTER WAS TAKING SHAPE OVER OUR SOUTHWESTERN CWFA...AND THIS IS EXPECTED TO MOVE/DEVELOP EAST-NORTHEASTWARD ACROSS SOUTHERN SD. THE SURFACE BOUNDARY THAT HAS BEEN AROUND FOR THE LAST SEVERAL DAYS HAS NOW PUSHED INTO SOUTH-CENTRAL SD...AND IT WILL NOT MOVE MUCH FOR THE REST OF THE EVENING. THE MAIN DIFFERENCE BETWEEN TONIGHT AND OTHER NIGHTS IS THE RATHER STRONG FRONTOGENESIS ZONE IN THE LOWER ATMOSPHERE...WHICH STRETCHES ACROSS THE SOUTHERN CWFA. AS THE LOW-LEVEL JET STRENGTHENS AND IMPINGES ON THIS FRONTAL ZONE LATER TONIGHT...EXPECT MOISTURE CONVERGENCE TO LEAD TO SOME LOCALLY HEAVY RAINFALL...WITH TRAINING AND SLOW-MOVING CELLS BASED ON THE THICKNESS PATTERN AND CORFIDI VECTORS. NOT ENOUGH CONFIDENCE FOR A FLOOD WATCH AT THIS TIME...BUT ONE MAY BE NEEDED AS THE EVENT UNFOLDS. .UNR...NONE. MJB
In the hours before
Local storm report, Jul 20, 4:02 PM MST, 3 hours 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
502 PM MDT SAT JUL 20 2002
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1250 AM 8 NW USTA SD 1 INCH HAIL
07/20/02 PERKINS REPORTED BY STORM
SPOTTER.
1250 AM 8 NW USTA SD WIND DAMAGE
07/20/02 PERKINS REPORTED BY STORM
SPOTTER.
0130 AM 2 W GLAD VLY SD 60 MPH TSTM GUST
07/20/02 ZIEBACH REPORTED BY STORM
SPOTTER. TREE BRANCHES
BROKEN.Local storm report, Jul 20, 4:41 PM MST, 2 hours 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
541 PM MDT SAT JUL 20 2002
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0307 PM 2 NE SILVER CITY SD 1.5 INCH HAIL
07/20/02 PENNINGTON REPORTED BY STORM
SPOTTER. LOTS OF 1.0 TO
1.5 INCH HAIL.
0426 PM 4 N DEERFIELD SD .75 INCH HAIL
07/20/02 PENNINGTON REPORTED BY STORM
SPOTTER.
0435 PM 8 SE NEWELL SD 1 INCH HAIL
07/20/02 BUTTE REPORTED BY STORM
SPOTTER. NICKEL TO
QUARTER SIZE HAIL.
LEFT-MOVING SUPERCELL
WITH PERSISTENT HAIL
SPIKE.
0507 PM 2 N BLACK HAWK SD .88 INCH HAIL
07/20/02 MEADE REPORTED BY OFF-DUTY
NWS EMPLOYEE.
0507 PM 2 N BLACK HAWK SD 60 MPH TSTM GUST
07/20/02 MEADE REPORTED BY OFF-DUTY
NWS EMPLOYEE.
ZCZC FSDLSRRAP ALL
TTAA00 KRAP DDHHMM
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
541 PM MDT SAT JUL 20 2002
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0307 PM 2 NE SILVER CITY SD 1.5 INCH HAIL
07/20/02 PENNINGTON REPORTED BY STORM
SPOTTER. LOTS OF 1.0 TO
1.5 INCH HAIL.
0426 PM 4 N DEERFIELD SD .75 INCH HAIL
07/20/02 PENNINGTON REPORTED BY STORM
SPOTTER.
0435 PM 8 SE NEWELL SD 1 INCH HAIL
07/20/02 BUTTE REPORTED BY STORM
SPOTTER. NICKEL TO
QUARTER SIZE HAIL.
LEFT-MOVING SUPERCELL
WITH PERSISTENT HAIL
SPIKE.
0507 PM 2 N BLACK HAWK SD .88 INCH HAIL
07/20/02 MEADE REPORTED BY OFF-DUTY
NWS EMPLOYEE.
0507 PM 2 N BLACK HAWK SD 60 MPH TSTM GUST
07/20/02 MEADE REPORTED BY OFF-DUTY
NWS EMPLOYEE.
ZCZC FSDLSRRAP ALL
TTAA00 KRAP DDHHMM
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
541 PM MDT SAT JUL 20 2002
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0307 PM 2 NE SILVER CITY SD 1.5 INCH HAIL
07/20/02 PENNINGTON REPORTED BY STORM
SPOTTER. LOTS OF 1.0 TO
1.5 INCH HAIL.
0426 PM 4 N DEERFIELD SD .75 INCH HAIL
07/20/02 PENNINGTON REPORTED BY STORM
SPOTTER.
0435 PM 8 SE NEWELL SD 1 INCH HAIL
07/20/02 BUTTE REPORTED BY STORM
SPOTTER. NICKEL TO
QUARTER SIZE HAIL.
LEFT-MOVING SUPERCELL
WITH PERSISTENT HAIL
SPIKE.
0507 PM 2 N BLACK HAWK SD .88 INCH HAIL
07/20/02 MEADE REPORTED BY OFF-DUTY
NWS EMPLOYEE.
0507 PM 2 N BLACK HAWK SD 60 MPH TSTM GUST
07/20/02 MEADE REPORTED BY OFF-DUTY
NWS EMPLOYEE.
ZCZC FSDLSRRAP ALL
TTAA00 KRAP DDHHMM
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
624 PM MDT SUN JUL 21 2002
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0858 PM 3 S RAPID CITY SD 65 MPH TSTM GUST
07/20/02 PENNINGTON REPORTED BY OFF-DUTY
NWS EMPLOYEE. EXTENSIVE
TREE DAMAGE. SHINGLES
OFF A FEW HOUSES.
0900 PM CAPUTA SD WIND DAMAGE
07/20/02 PENNINGTON REPORTED BY RETIRED NWS
EMPLOYEE. EXTENSIVE
TREE DAMAGE WITH A FEW
BIG TREES DOWN.
0925 PM 3 E NEW UNDERWOOD SD 60 MPH TSTM GUST
07/20/02 PENNINGTON REPORTED BY PUBLIC.
THREE-INCH TREE LIMBS
DOWN.
1130 PM KADOKA SD 60-65 MPH TSTM GUST
07/20/02 JACKSON REPORTED BY LAW
ENFORCEMENT OFFICIAL.
BunkersLocal storm report, Jul 20, 5:00 PM MST, 2 hours 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
600 PM MDT SAT JUL 20 2002
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0307 PM 2 NE SILVER CITY SD 1.5 INCH HAIL
07/20/02 PENNINGTON REPORTED BY STORM
SPOTTER. LOWS OF 1.0 TO
1.5 INCH HAIL.
0426 PM 4 N DEERFIELD SD .75 INCH HAIL
07/20/02 PENNINGTON REPORTED BY STORM
SPOTTER.
0435 PM 8 SE NEWELL SD 1 INCH HAIL
07/20/02 BUTTE REPORTED BY STORM
SPOTTER. NICKEL TO
QUARTER SIZE HAIL.
LEFT-MOVING SUPERCELL
WITH PERSISTENT HAIL
SPIKE.
0507 PM 2 N BLACK HAWK SD .88 INCH HAIL
07/20/02 MEADE REPORTED BY OFF-DUTY
NWS EMPLOYEE.
0507 PM 2 N BLACK HAWK SD 60 MPH TSTM GUST
07/20/02 MEADE REPORTED BY OFF-DUTY
NWS EMPLOYEE.The radar
The national radar mosaic for the moment the first event began.
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 Missouri, July 20 to 22, 2002
- Damaging Wind in Florida, July 20, 2002
- Heat in Maryland, July 20, 2002
- Damaging Winds in South Dakota, July 20, 2002
- Damaging Wind in Georgia, July 20, 2002
- Lightning Strike in South Carolina, July 20, 2002
- Hail and Damaging Wind in Alabama, July 20, 2002
- Heat in Illinois, July 20 to 22, 2002
- Damaging Wind in Florida, July 20, 2002
- Hail and Damaging Winds in Oklahoma, July 20 to 22, 2002
- Lightning Strike in North Carolina, July 20, 2002
- Hail and Damaging Winds in Florida, July 20, 2002
More
Every storm in South Dakota in 2002Every state in 2002This day in weather historyWarnings in South Dakota, 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: 5304759.