1 hail, as filed by the National Weather Service.
Every event with a place to put it. Tap one for its entry below.
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.
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 22, 1:15 PM MST, 4 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 215 PM MDT MON JUL 22 2002 FEW WEAK TSTMS DVLPG OVR CO MTNS AND INTO S CNTRL WY ZONES. AMS IS WEAKLY UNSTABLE LARAMIE RANGE WWD. LI/S TO -2 AND CAPES AROUND 1400 J/KG. ERN PLAINS OF WY INTO WRN NEB PROGGED TO REMAIN STABLE. TSTMS WILL HAVE A HARD TIME MAKING EAST OF THE MTNS EARLY THIS EVENING. ON TUESDAY...WARM FRONT LIFTS EAST ACROSS THE CWA WITH A RETURN TO WARMER TEMPS. AVN CONTS ITS TREND OF OVER-DOING SHORT WAVE TROFS MOVG OVR THE TOP OF THE RIDGE. NONE OF THE OTHER MODELS NEARLY AS STRONG WITH WAVE MOVG THRU THE FLOW ON TUESDAY. META SHOWING WEAK INSTABILITY OVR SE WY EARLY IN THE AFT...THEN SHIFTS EAST INTO THE PANHANDLE TOWARD EVENING. ALSO PREFER THE META/S HANDLING OF THE RH FIELDS TUESDAY...FLUSHING THE MSTR OUT EARLIER. INCLUDED WDLY SCT POPS FOR TUESDAY. THICKNESSES INCRS TO 582-585 DECAMETERS DURING THE AFT. RDG BUILDS FARTHER NORTH ON WED...WITH ENERGY REMAINING WELL TO OUR NORTH DURING THE DAY. TEMPS EVEN A FEW DEGREES WARMER ON WED WITH BREEZY TO WINDY DOWNSLOPE SFC WNDS DURG THE AFT. AVN AGAIN INDICATING AN ANOMALOUSLY STRONG VORT MOVG EAST THRU WY ON THURSDAY. BROAD RDG FLATTENS IN RESPONSE TO ENERGY MOVG OUT OF THE TROF OVR THE NW COAST THURSDAY. BLV THAT DESPITE AVN/S PERSISTANT PROBLEM STRENGTHENING VORT CENTERS...THAT SOME ENERGY WILL MOVE THRU CWA THURSDAY WITH A BETTER CHANCE OF TSTMS. SFC TROF EXTENDED NWD INTO SRN WY WITH LOW LVL CONVERGENCE ALG THE BOUNDARY. HAVE INCLUDED SCT POPS ON THURSDAY. TEMPS ONLY A FEW DEGREES COOLER THAN WEDNESDAY. EXTENDED...ON FRI A SERIES OF WEAK UPR FTRS TO AFFECT AREA IN W FLOW ALOFT. SOME DIFFERENCES IN MODELS IN LATER PDS AS 12Z AVN AND OPERNTL MRF FASTER IN BRINGING IN THE NEXT PAC UPR TROF ON SAT/SUN WHILE ECMWF HOLDS DEEPER TROF FURTHER W AND HUMPS UP RDG OVER REGION. MEAN OF MRF SPAGHETTI PLOTS ALSO SUGGESTS TROF WILL BE HANGING BACK. NOGAPS ALSO LEANING TWDS THIS IDEA...SO WILL GO MORE WITH A WARMER REGIME THAN MRF SHOWING. SW FLOW ALOFT MAY STILL BE ABLE TO TAP BETTER MSTR TO OUR S/SW...SO WILL KEEP CHC TSTMS GOING INTO MON. .CYS... WY...NONE. NE...NONE. STARK
The national radar mosaic for the moment the first event began.
1 hail. Local standard time, as filed.
Storm dropped large amounts of hail with sizes up to 1 1/2 inches. Heavy rain also occurred creating local areas of drifted hail as well as washing out a fewrural roads.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2002Every state in 2002This day in weather historyWarnings in Wyoming, July 2002
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: 5304068.