Name: Hail in Utah, August 20, 2002
Start: 2002-08-20T13:40
End: 2002-08-20T13:42
Location: Utah

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: 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 Grand Junction, CO wrote its last area forecast discussion before the first event at Aug 20, 1:34 PM MST, 6 minutes earlier.

Area forecast discussion, Aug 20, 1:34 PM MST, 6 minutes before

WESTERN COLORADO & EASTERN UTAH AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
234 PM MDT TUE AUG 20 2002

BROAD TROUGH OF LOW PRESSURE SETTING UP OVER THE PACIFIC NORTHWEST
HAS PLACED EASTERN UTAH AND WESTERN COLORADO UNDER THE INFLUENCE OF
MOIST SW FLOW TODAY (MORNING KGJT SOUNDING SHOWED PRECIPITABLE WATER
IN EXCESS OF 1.2 INCHES). SCATTERED SHOWERS AND THUNDERSTORMS WILL
LIKELY LINGER INTO THE LATE NIGHT HOURS AS A COUPLE MORE WEAK SHRTWVS
MOVE THROUGH THE AREA.  WL CONT THE FLASH FLOOD WATCH FOR LA PLATA
AND GARFIELD COUNTIES IN WESTERN COLORADO DUE TO THE RAINFALL EARLIER
TODAY...WITH MORE SHOWERS AND THUNDERSTORMS STILL A GOOD
POSSIBILITY.

OVERALL TREND IN THE NEW MODELS RUNS CONTS TO ADVERTISE DRIER AIR
SWEEPING THROUGH THE AREA BY LATE TONIGHT AND DURING THE DAY ON
WEDNESDAY. HOWEVER...LOW LEVEL MOISTURE WILL BE SLOWER TO ERODE...
AND WARMER AFTERNOON TEMPS WL STILL LEAD TO THE POSSIBILITY OF
ADDITIONAL SHOWERS AND THUNDERSTORMS BY THE AFTERNOON HOURS.  MAIN
FOCUS OF CONVECTION THOUGH IS EXPECTED TO BE CONFINED TO THE HIGHER
TERRAIN AND OVER THE SOUTHERN VALLEYS...CLOSER TO THE DEEPER
MOISTURE.  SIMILAR TRENDS WL CONT ON THURSDAY WITH TEMPS SLOWLY
CREEPING BACK UP TO ABOVE NORMAL READINGS BY THE END OF THE WEEK.
JDC

(SAT-TUE)...MOSTLY DRY. UPPER LOW LINGERING NEAR OR/CA/NV POINT
EXPECTED TO TO LIFT OUT DURING THE WEEKEND AS UPPER HIGH BUILDS WEST
ACROSS DESERT SOUTHWEST. DRIER SOUTHWEST FLOW SAT-SUN AS MOISTURE
APPEARS LIMITED BELOW 500 MB. HOWEVER...POSSIBLE WEAK JET SUPPORT
ASSOCIATED WITH EJECTING UPPER LOW PLUS DAYTIME HEATING AND ANY
WEAK IMPULSES ENOUGH TO KEEP MENTION OF SLIGHT CHANCE OF AFTERNOON
THUNDERSTORMS FOR THE MTNS SAT-SUN. ECWMF THEN KEEPS A TROUGH NEAR
PAC NW COAST EARLY NEXT WEEK WHILE AVN HAS REMNANTS OF UPPER LOW OVER
THE NORTHERN ROCKIES WITH WEAK TROUGHING FROM WY BACK TO SRN CA. WILL
KEEP A SLIGHT CHANCE OF THUNDERSTORMS FOR THE MTNS MON-TUE. LITTLE
CHANGE IN TEMPS.  JAD

.GJT...NONE.

The radar

The Grand Junction radar (KGJX), 211 km away, was scanning. The volume nearest the first event began at 20:40 UTC.

Open the radar archive at this moment

Event by event

1 hail. Local standard time, as filed.

Hail, Uintah

When: August 20, 1:40 PM MST to 1:42 PM MST
Where: Uintah County, 9 mi N of Lapoint
Measured: 1.5 in hail
Reported by: TRAINED SPOTTER
Coordinates: 40.517, -109.800

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 Utah in 2002 Every state in 2002 This day in weather history Warnings in Utah, August 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: 5320721.