Hail and Damaging Wind in Wyoming, July 22, 2013

Name: Hail and Damaging Wind in Wyoming, July 22, 2013
Start: 2013-07-22T17:33
End: 2013-07-22T18:46
Location: Wyoming

July 22, 2013 · NWS UNR · 7 events in 2 counties and zones

A second severe thunderstorm developed northwest of Sundance early in the evening and moved southeastward to Four Corners. Hail to golf ball size and wind gusts over 70 mph was reported along its track.

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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $155,000
Crop damage: None recorded
Events: 7

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 happened

The episode as NWS UNR wrote it up.

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 22, 2:00 PM MST, 3 hours 33 minutes earlier.

Area forecast discussion, Jul 22, 2:00 PM MST, 3 hours 33 minutes before

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
300 PM MDT MON JUL 22 2013

.SHORT TERM...THIS EVENING THROUGH TUESDAY NIGHT
ISSUED AT 234 PM MDT MON JUL 22 2013

CURRENT SURFACE MAP PLACES HIGH PRESSURE ACROSS THE EASTERN
DAKOTAS...WITH WEAK LOW DEVELOPING NEAR THE BIG HORNS ALONG
STATIONARY FRONT. MESO ANALYSIS SHOWS 1000-1500 J/KG MLCAPE ACROSS
NORTHEAST WYOMING INTO THE BLACK HILLS AND SOUTHWEST SOUTH DAKOTA.
MLCIN DECREASING...BUT STILL 50-100J/KG. WEAK LOW LEVEL
CONVERGENCE ALONG SURFACE BOUNDARY AND OVER HIGHER TERRAIN OF
BLACK HILLS SHOULD BE STRONG ENOUGH FOR ISOLATED THUNDERSTORMS TO
DEVELOP IN THE NEXT HOUR OR TWO. LATEST RUN OF THE HRRR...ALONG
WITH 18Z NAM/RUC ALL SUPPORT ISOLATED CONVECTION OVER NORTHEAST
WYOMING INTO WESTERN SOUTH DAKOTA THROUGH EARLY EVENING.
SUFFICIENT SHEAR FOR A FEW SUPERCELLS WITH LARGE HAIL THROUGH THIS
EVENING.

THUNDERSTORM CHANCES INCREASE LATE THIS EVENING/OVERNIGHT...ESPECIALLY
ACROSS NORTHWEST SOUTH DAKOTA INTO THE PHILIP AREA. LOW LEVEL SETS
UP ACROSS WESTERN SOUTH DAKOTA TONIGHT IN RESPONSE TO SHORTWAVE
CROSSING EASTERN MONTANA/WESTERN NORTH DAKOTA. BEST 700MB THETA-E
ADVECTION IS NORTH AND EAST OF THE BLACK HILLS. FORECAST SOUNDINGS
SUPPORT CAPE OF 1000-1500J/KG WITH MINIMAL CAP WITH UPDRAFTS
INITIATED AT 700MB. SMALL THREAT FOR LARGE HAIL TO CONTINUE OVERNIGHT.
HAVE INCREASED POPS ACROSS NORTHWEST SOUTH DAKOTA OVERNIGHT.
CONVECTION WILL LINGER INTO TUESDAY MORNING...ESPECIALLY ACROSS
SOUTH CENTRAL SOUTH DAKOTA. NARROW AXIS OF INSTABILITY ACROSS
WESTERN SOUTH DAKOTA TUESDAY AFTERNOON WILL RESULT IN SOME
ISOLATED THUNDERSTORMS.

.LONG TERM...WEDNESDAY THROUGH MONDAY
ISSUED AT 234 PM MDT MON JUL 22 2013

PERSISTENT UPPER LEVEL RIDGE OVER THE SOUTHWESTERN
CONUS WILL KEEP WEST TO NORTHWEST FLOW OVER THE NORTHERN PLAINS
THROUGH MUCH OF THE EXTENDED PERIOD. A VARIETY OF SHORT WAVES RIDING
UP AND OVER THE RIDGE WILL BRING A NEAR DAILY CHANCE FOR
THUNDERSTORMS. NEAR AVERAGE TEMPERATURES ARE EXPECTED THROUGH THE
WEEKEND.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z TUESDAY AFTERNOON)
ISSUED AT 234 PM MDT MON JUL 22 2013

ISOLD/SCT THUNDERSTORMS ARE EXPECTED TO DEVELOP LATE
THIS AFTERNOON/EARLY EVENING OVER THE BLACK HILLS AREA AND FAR
NORTHEASTERN WY...THEN TRACK EAST-SOUTHEAST ACROSS WESTERN SD
TONIGHT. MORE SHOWERS AND STORMS COULD MOVE ACROSS NORTHERN
PORTIONS OF SD FROM MT DURING THE OVERNIGHT. A FEW STORMS COULD BE
STRONG TO SEVERE WITH HAIL AND GUSTY WINDS. MVFR CONDITIONS ARE
POSSIBLE IN THE VICINITY OF ANY STRONGER STORMS. OTHERWISE...VFR
CONDITIONS ARE GENERALLY EXPECTED THROUGH TONIGHT.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
WY...NONE.
&&

SHORT TERM...7
LONG TERM...26
AVIATION...26

Hazardous weather outlook, Jul 22, 2:08 AM MST, 15 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
308 AM MDT MON JUL 22 2013

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-231400-
BENNETT-BUTTE-CENTRAL BLACK HILLS-CUSTER CO PLAINS-FALL RIVER-HAAKON-
HARDING-HERMOSA FOOT HILLS-JACKSON-MELLETTE-NORTHEASTERN CROOK-
NORTHERN BLACK HILLS-NORTHERN CAMPBELL-NORTHERN FOOT HILLS-
NORTHERN MEADE CO PLAINS-PENNINGTON CO PLAINS-PERKINS-RAPID CITY-
SHANNON-SOUTHERN BLACK HILLS-SOUTHERN CAMPBELL-SOUTHERN FOOT HILLS-
SOUTHERN MEADE CO PLAINS-STURGIS/PIEDMONT FOOT HILLS-TODD-TRIPP-
WESTERN CROOK-WESTON-WYOMING BLACK HILLS-ZIEBACH-
308 AM MDT (408 AM CDT) MON JUL 22 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND
NORTHEASTERN WYOMING.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS OVER NORTHEASTERN
WYOMING...THE BLACK HILLS AND FAR SOUTHWESTERN SOUTH DAKOTA LATE
THIS AFTERNOON. AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE. THERE
IS A BETTER CHANCE OF SHOWERS AND THUNDERSTORMS OVER WESTERN AND
CENTRAL SOUTH DAKOTA TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE IS A CHANCE OF THUNDERSTORMS OVER VARIOUS PARTS OF THE AREA
NEARLY EVERY DAY TUESDAY THROUGH SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT.

&&

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...
OR CHECK OUR WEB SITE AT WEATHER.GOV/RAPIDCITY

In the hours before

Local storm report, Jul 22, 4:39 PM MST, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
539 PM MDT MON JUL 22 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     HAIL             2 N DEVILS TOWER JUNCTI 44.54N 104.68W
07/22/2013  E0.50 INCH       CROOK              WY   TRAINED SPOTTER

&&

DBARBER

Local storm report, Jul 22, 4:50 PM MST, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
550 PM MDT MON JUL 22 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0535 PM     HAIL             4 N HULETT              44.74N 104.60W
07/22/2013  E1.75 INCH       CROOK              WY   TRAINED SPOTTER

            1.5 INCH HAIL CONTINUES AT 1745 MDT

&&

DBARBER

Local storm report, Jul 22, 4:55 PM MST, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
555 PM MDT MON JUL 22 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0533 PM     HAIL             SUNDANCE                44.40N 104.37W
07/22/2013  E1.00 INCH       CROOK              WY   TRAINED SPOTTER

&&

WFO UNR

Local storm report, Jul 22, 4:59 PM MST, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
559 PM MDT MON JUL 22 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0535 PM     HAIL             4 SE SUNDANCE           44.36N 104.32W
07/22/2013  E0.88 INCH       CROOK              WY   TRAINED SPOTTER

&&

WFO UNR

Local storm report, Jul 22, 5:17 PM MST, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
617 PM MDT MON JUL 22 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 PM     HAIL             HULETT                  44.68N 104.60W
07/22/2013  E0.88 INCH       CROOK              WY   CO-OP OBSERVER

&&

WFO UNR

Special weather statement, Jul 22, 5:31 PM MST, 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
631 PM MDT MON JUL 22 2013

WYZ056-057-230115-
WESTERN CROOK WY-WYOMING BLACK HILLS WY-
631 PM MDT MON JUL 22 2013

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CROOK COUNTY UNTIL 715 PM
MDT...

AT 629 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES SOUTHWEST OF
BEULAH TO CARLILE...AND MOVING SOUTHEAST AT 40 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  SUNDANCE...

THIS INCLUDES INTERSTATE 90 BETWEEN WYOMING MILE MARKERS 168 AND
202...

&&

LAT...LON 4436 10406 4428 10467 4465 10494 4469 10467
      4462 10417
TIME...MOT...LOC 0031Z 307DEG 34KT 4444 10415 4447 10475

POJORLIE

The radar

The Rapid City radar (KUDX), 156 km away, was scanning. The volume nearest the first event began at 00:33 UTC.

Open the radar archive at this moment

Event by event

6 hail, 1 thunderstorm wind. Local standard time, as filed.

Hail, Crook

When: July 22, 5:33 PM MST
Where: Crook County, 1.26 mi SSE of Devils Tower
Measured: 0.75 in hail
Reported by: Trained Spotter
Coordinates: 44.564, -104.688

Hail, Crook

When: July 22, 6:00 PM MST to 6:15 PM MST
Where: Crook County, Sundance
Measured: 1.5 in hail
Property damage: $150,000
Reported by: Law Enforcement
Coordinates: 44.410, -104.380

Hail, Crook

When: July 22, 6:10 PM MST
Where: Crook County, 4.56 mi SE of Sundance
Measured: 0.88 in hail
Reported by: Trained Spotter
Coordinates: 44.356, -104.327

Thunderstorm Wind, Crook

When: July 22, 6:10 PM MST
Where: Crook County, 4.56 mi SE of Sundance
Measured: 63 kt (72 mph) measured gust
Reported by: Trained Spotter
Coordinates: 44.356, -104.327

Hail, Crook

When: July 22, 6:20 PM MST
Where: Crook County, 7.27 mi SE of Sundance
Measured: 1 in hail
Reported by: Public
Coordinates: 44.340, -104.270

Hail, Weston

When: July 22, 6:40 PM MST
Where: Weston County, 5.92 mi NNE of Four Corners
Measured: 1.75 in hail
Reported by: Trained Spotter
Coordinates: 44.149, -104.084

Hail, Weston

When: July 22, 6:46 PM MST
Where: Weston County, 0.99 mi E of Four Corners
Measured: 1.75 in hail
Property damage: $5,000
Reported by: Public
Coordinates: 44.070, -104.110

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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

Every storm in Wyoming in 2013 Every state in 2013 This day in weather history Warnings in Wyoming, July 2013

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: 466578, 466580, 471123, 471124, 471122, 466583, 466584.