Thunderstorm Wind, Lyon
- When
- July 12, 2:30 PM PST to 3:00 PM PST
- Where
- Lyon County, Dayton
- Property damage
- $50,000
- Reported by
- BROADCAST MEDIA
- Coordinates
- 39.233, -119.583
Several downed power poles and four small trailers destroyed.
A line of severe thunderstorms moved through southern Washoe and northern Lyon County, NV between 3:30 and 4:30 pm PDT. Numerous spotter reports of 3/4 inch hail in Cold Springs and Sun Valley.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 episode as NWS REV wrote it up.
A line of severe thunderstorms moved through southern Washoe and northern Lyon County, NV between 3:30 and 4:30 pm PDT. Numerous spotter reports of 3/4 inch hail in Cold Springs and Sun Valley. Several power poles and four small trailers were destroyed by high winds near Dayton.
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 Reno, NV wrote its last area forecast discussion before the first event at Jul 12, 1:45 PM PST, 45 minutes earlier.
WESTERN NEVADA AND EASTERN CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RENO NV 245 PM PDT FRI JUL 12 2002 DEEP SOUTHEAST FLOW ALONG THE SIERRA AND WESTERN SLOPES PUSHING MOIST UNSTABLE AIR NORTHWEST. VERY LITTLE DYNAMICS ASSOCIATED WITH THIS CONVECTION SO DEVELOPMENT MAINLY BASED ON OROGRAPHIC AND TSTMS OUTFLOW TRIGGERS. BECAUSE OF THE LACK OF DYNAMICS CONVECTION SHOULD GRADUALLY DIMINSH TOWARDS SUNSET. GUSTY WINDS LIKELY THIS EVENING WITH THIS CONVECTION. ANOTHER ROUND OF CONVECITON SATURDAY. THE MODELS DO HAVE A S/W ASSOCIATED WITH THIS THAT MOVES OVER THE AREA SATRUDAY NIGHT. THAT WILL LIKELY MAINTAIN THE CONVECTION OVERNIGHT SO WILL THROW IT IN DURING THE NIGHT. THEN THE AVN HAS THE HIGH PUSHING EAST GRADUALLY ENDING UP IN THE ROCKIES. A TROF WITH DRY SOUTHWEST FLOW ESTABLISHES ALONG THE COAST SO WE WILL GRADUALLY DRY OUT. HAVE PUSHED THE TSTMS EAST AND SHOULD AFTER SUNDAY. IN THE EXTENDED...FOR THE TUE THROUGH FRI PERIOD WILL BEGIN TO LEAN MORE TOWARD A GRADUAL DRYING TREND IN LINE WITH CONSISTENT AVN RUNS AND SHIFT TSTM ACTIVITY TOWARD THE SOUTH AND EAST. ECMWF TRYING TO GRADUALLY SHIFT PERSISTENT RIDGE ACROSS AREA SLOWLY E TO THE EASTERN GREAT BASIN TUE AND WED AND MORE TOWARD THE NORTHERN PLAINS TOWARD THE END OF THE WEEK. AVN FOR TUES AND WED ALSO CONTS TO BRING DRIER SW FLOW INTO N AND W PTNS CWA. WILDCARD IS...AS MENTIONED IN PREVIOUS DISCUSSION...WHETHER REMNANT TROPICAL MOISTURE FROM TS CRISTINA MIGHT BE ENTRAINED INTO AREA FOR MID WEEK. PREVIOUS FCST KEPT CHANCE POPS ALL ZONES WITH THIS REASONING BUT WILL LEAN MORE TOWARD AVN/MRF TREND OF DRIER FCST MAINLY N AND W. BY THUR AND FRI THIS MEANS THAT WILL KEEP CHC POPS ONLY IN MONO AND MINERAL COUNTIES. JAH .REV...RED FLAG WARNING UNTIL 800 PM FOR ALL FIRE WEATHER ZONES.
The Reno radar (KRGX), 59 km away, was scanning. The volume nearest the first event began at 22:27 UTC.
3 thunderstorm wind. Local standard time, as filed.
Several downed power poles and four small trailers destroyed.
3/4 inch hail
3/4 inch hail
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2002Every state in 2002This day in weather historyWarnings in Nevada, 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: 5314617, 5314618, 5314616.