Name: Hail in Wyoming, May 27, 2002
Start: 2002-05-27T16:58
End: 2002-05-27T17:04
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 May 27, 1:07 PM MST, 3 hours 51 minutes earlier.

Area forecast discussion, May 27, 1:07 PM MST, 3 hours 51 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
207 PM MDT MON MAY 27 2002

WARM PATTERN TAKING SHAPE THIS WEEK...MORE LIKE SUMMER THAN SPRING.
WILL KEEP LOW POPS IN TONIGHT FOR EVENING THUNDERSTORMS. AN UPPER
LEVEL RIDGE WILL MOVE OVER THE REGION TUE. AN ELONGATED LOBE OF
VORTICITY WILL PUSH THROUGH THE RIDGE AXIS TO OUR NORTH TUE
NIGHT...BUT ONLY THE SOUTHERN TIP OF THE VORT LOBE WILL BRUSH
NORTHERN PORTIONS OF THE CYS FORECAST AREA. THE UPPER RIDGE WILL
AMPLIFY OVER WY WED AND THU...WITH NO LATE DAY SHOWERS AND
THUNDERSTORMS EXPECTED WED AND THU. TEMPERATURES TUE WILL REMAIN
MILD...70S AND 80S IN THE LOWER ELEVATIONS. TEMPS IN THE 80S WILL
BECOME MORE WIDESPREAD WED AS HEIGHTS AND THICKNESS VALUES INCREASE.
LITTLE CHANGE IN EXPECTED MAX TEMPS THU AS THE SURFACE PATTERN IS
PROGGED TO CHANGE VERY LITTLE. REGARDING POPS...USUALLY IN A
SUMMERLIKE PATTERN IT IS SAFE TO GO WITH ISOLATED AFTERNOON/EVENING
THUNDERSTORMS AS AIRMASS TYPE THUNDERSTORMS CAN DEVELOP WITH VERY
LITTLE IN THE WAY OF DYNAMICS OR SURFACE BASED MOISTURE. MODELS PROG
THE ATMOSPHERE TO DESTABILIZE EACH AFTERNOON INTO THE EVENING TUE
THROUGH THU...WITH LOW NEGATIVE LI VALUES...SO WILL GO WITH ISOLATED
LATE DAY POPS IN MOST OF CYS FORECAST AREA...WITH WIDELY SCATTERED
POPS IN MOUNTAINS DUE TO ADDITIONAL UPLIFT RESULTING FROM OROGRAPHY.

IN THE EXTENDED...THE UPR RIDGE OVR THE 4 CORNERS WL FLATTEN AND
SLOWLY GIVE WAY TO BROAD TROFINESS BY THE END OF THE PERIOD. THE
ECMWF/UKMET SOLUTIONS ARE SOMEWHAT FASTER WITH SRN STREAM ENERGY OFF
THE CA COAST OVR THE WEEKEND...AS COMPARED TO THE MRF. OTRW...THE
MEDIUM RANGE MODELS AND MRF ENSEMBLES ARE IN FAIRLY CLOSE AGREEMENT.
UPR FLOW BACKS OVR THE WEEKEND AS WK S/WV FEATURES MOVE THRU DVLPG
SW FLOW. AT THE SFC...LOW LVL FLOW TURNS MORE E/SE EAST OF THE
LARAMIE RANGE ON BACKSIDE OF SFC HI OVR THE PLAINS. HARD TO TIME OR
LOCATE WEAK S/WV FEATURES...SO WL GO WITH BLANKET SCT SHWR/TSTM
CHANCES OVR THE WEEKEND. MON...NRN STREAM ENERGY MVS OUT OF WRN
CANADA AND THRU ID/WRN WY. THIS WL BRING COOLER TEMPS...ALONG WITH
CONTG SHWR/TSTM CHANCES.

.CYS...
WY...NONE.
NE...NONE.

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, Niobrara

When: May 27, 4:58 PM MST to 5:04 PM MST
Where: Niobrara County, 11 mi NE of Lance Creek
Measured: 1.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 43.150, -104.517

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 2002 Every state in 2002 This day in weather history Warnings in Wyoming, May 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: 5290284.