Name: Hail in Wyoming, July 10, 2001
Start: 2001-07-10T19:13
End: 2001-07-10T19:16
Location: Wyoming

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

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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 Cheyenne, WY wrote its last area forecast discussion before the first event at Jul 10, 3:41 PM MST, 3 hours 32 minutes earlier.

Area forecast discussion, Jul 10, 3:41 PM MST, 3 hours 32 minutes before

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE CHEYENNE WY
358 PM MDT TUE JUL 10 2001

THUNDERSTORMS HAVE BEEN DEVELOPING SINCE 1830Z OVER AND NEAR THE
SOUTHEAST WYOMING MOUNTAINS.  STORMS TONIGHT WILL BE MAINLY HEAVY
RAIN PRODUCERS AS IN RECENT NIGHTS DUE TO THE PRECIPITABLE WATER
VALUES WELL ABOVE NORMAL THROUGH TONIGHT AND THEIR SLOW MOVEMENT.
WILL CONTINUE THE PREVIOUSLY ISSUED FLASH FLOOD WATCH FOR THE
LARAMIE RANGE AND POINTS EASTWARD.  MAIN AREA OF CONCERN CONTINUES
TO BE FROM PLATTE COUNTY EASTWARD WHERE RECENT RAINS HAVE LOWERED
FLASH FLOOD GUIDANCE.  MOST OF THE THUNDERSTORMS IN NORTHERN PART
OF THE COUNTY WILL BE MULTICELLUAR WHILE THOSE CLOSER TO THE
COLORADO BORDER WILL BE MORE SUPERCELLS WITH PERHAPS MORE OF A
THREAT OF SEVERE WEATHER.  THE ACTIVITY WILL SLOWLY DIMINISH TONIGHT
WITH THE THREAT OF HEAVY RAINFALL EXTENDING INTO THE EARLY MORNING
HOURS.  FOR THE REST OF THE FORECAST...MODELS ARE ALL INDICATING A
MORE WESTERLY WIND FLOW ALOFT AND AT THE SURFACE AS THE UPPER HIGH
CONTINUES TO PROGRESS WEST.  MODELS DIFFER ON TIMING OF ANY
SHORTWAVE TROUGHS AND SO THREAT OF PRECIPITATION WILL BE BASED ON
MAINLY LOCATION OF MID AND UPPER LEVEL MOISTURE PLUME.  MODELS HAVE
THE PLUME FURTHER WEST AND SOUTH WESDNESDAY AND THURSDAY.  SURFACE
LOW PRESSURE TROUGH ALSO MOVES EAST OF THE CWA ON WEDNESDAY.
TEMPERATURES SHOULD WARM THROUGH THURSDAY IN THE WESTERLY AND DRIER
FLOW AND WILL GO ABOVE THE GUIDANCE FORECAST HIGHS.

.EXTENDED DISCUSSION...
UPR HIGH CHNGES LITTLE IN POSITION THRU THE WEEKEND...MEANDERING
OVER THE SRN PLAINS.  THIS WILL KEEP MONSOONAL FLOW GOING ACROSS
THE CWA...THUS CHCS FOR AFTN AND NIGHTTIME SHOWERS AND TSTORMS.
PATTERN SLOWLY PROGRESSIVE...BUT NOT ENUF TO BRING ANY SIG DRYING
OF THE AMS OVER THE RGN.

.CYS...
WY...FLASH FLOOD WATCH SE EARLY TNGT. ZNS 59..60..63..64..66>70.
NE...FLASH FLOOD WATCH WRN 2/3 PNHNDL EARLY TNGT  ZNS 1>3..19>21
                                                        ..54..55.

CORRECTED TO INCLUDE FF WATCH CODING FOR NEBRASKA ABOVE.

WEILAND/EMANUEL/JLH

In the hours before

Local storm report, Jul 10, 2:56 PM MST, 4 hours 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE, WY
356 PM MDT TUE JUL 10 2001

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0720 PM    33 N LANCE CREEK          WY   WIND DAMAGE
07/6/01   NIOBRARA                       WIND TOOK ROOF OFF SHED.

0720 PM    25 N LANCE CREEK          WY   .88 INCH HAIL
07/6/01   NIOBRARA

GRIFFITH

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 hail. Local standard time, as filed.

Hail, Laramie

When: July 10, 7:13 PM MST to 7:16 PM MST
Where: Laramie County, 22 mi N of Cheyenne
Measured: 1.75 in hail
Reported by: EMERGENCY MANAGER
Coordinates: 41.450, -104.817

What these are

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

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Wyoming in 2001 Every state in 2001 This day in weather history Warnings in Wyoming, July 2001

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: 5258051.