Nevada, 2004Flash Flood in Nevada, July 21, 2004
July 21, 2004 · NWS REV · 1 event in 1 county or zone
1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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
- 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 Reno, NV wrote its last area forecast discussion before the first event at Jul 21, 2:34 PM PST, 4 hours 26 minutes earlier.
Area forecast discussion, Jul 21, 2:34 PM PST, 4 hours 26 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
334 PM PDT WED JUL 21 2004
.SHORT TERM...
THE PRECIPITATION FORECAST THROUGH SATURDAY WILL BE FOCUSED ON TWO
MAIN FACTORS...WEAK FLOW INSTABILITY BUILDING NORTH ALONG THE SIERRA
CREST AND A WEAK PACIFIC FRONT EASING INTO OUR NORTHEASTERN AREAS ON
THURSDAY. FOR OUR WESTERN ZONES...I BASED THE NEXT COUPLE DAYS OF
CONVECTION ON WHAT IS OCCURRING THIS AFTERNOON. WEAK SOUTHERLY FLOW
ALOFT WILL ALLOW ISOLATED STORMS TO BUILD UP TO TAHOE AND ALONG THE
PINE NUT RANGE TO THE EAST OF CARSON CITY THURSDAY...AND THEN
PERHAPS UP TO PYRAMID LAKE OR SO FRIDAY. MEANWHILE...THE PACIFIC
FRONT OVER OUR NORTHERN AND EASTERN ZONES WILL PROVIDE SOME
CONVERGENCE FOR A FEW STORMS WITH STRONG DAYTIME HEATING THROUGH
SATURDAY. TEMPERATURE WISE...CONTINUED ABOVE NORMAL TEMPERATURES ARE
EXPECTED THROUGH SATURDAY NIGHT UNDER THE UPPER RIDGE SPREADING WEST
INTO THE REGION. AT LEAST THERE IS SOME SLIGHT GOOD NEWS WITH
TEMPERATURES IN THAT THE UPPER RIDGE LOOKS CONSIDERABLY LESS
POWERFUL THEN IT DID JUST A COUPLE MODEL RUNS AGO...SO INSTEAD OF
101 WE MIGHT HAVE ABOUT 98 FOR RENO. HAIL THE SMALL VICTORIES.
SNYDER
&&
.LONG TERM...SUNDAY THROUGH WEDNESDAY...
RIDGE RETROGRADES TO THE ERN PACIFIC THROUGH THE EXTENDED PERIOD.
SHORTWAVE ENERGY FLATTENS THE RIDGE AS IT BUILDS WEST BRINGER OUR
AREA UNDER A COOLER NW FLOW BY MONDAY. MODELS SLIGHTLY DIFFER ON
HANDLING SHORTWAVE ENERGY AS IT MOVES DOWN THE BACKSIDE OF THE
RIDGE. INTRODUCED SOME CHICKEN POPS OVER NRN AREAS SUN-TUE ASSUMING
MODELS CONTINUE TO STRENGTHEN TROUGHINESS OVER THE PACIFIC NORTHWEST
DURING THAT TIME FRAME. ALSO KEPT SLIGHT CHANCES OVER THE FAVORABLE
SRN CONVERGENCE ZONE THROUGH THE PERIOD AS MOISTURE/INSTABILITY
LINGERS. TEMPS COOL A LITTLE UNDER NW FLOW BUT REMAIN ABOVE NORMAL
THROUGH THE EXTENDED. JORDAN
&&
.REV WATCHES/WARNINGS/ADVISORIES...
NV...NONE.
CA...NONE.
&&
In the hours before
Local storm report, Jul 21, 2:39 PM PST, 4 hours 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
339 PM PDT WED JUL 21 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0304 PM HAIL WOODFORDS 38.78N 119.82W
07/21/2004 0.75 INCH ALPINE CA TRAINED SPOTTER
&&
BFOFlash Flood, Lyon
- When
- July 21, 7:00 PM PST to 8:00 PM PST
- Where
- Lyon County, 10 mi W of Silver Spgs
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.020, -119.189 (the zone’s center; the record gives no point)
Flash flooding occurred in the city of Stagecoach. Some streets were underwater including Iroquois Trail, the Apache area, the Raindance area, and Boyer Lane.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Damaging Wind in Puerto Rico, July 21, 2004$15 million · 50 kt wind · 1 event
- Damaging Wind in South Dakota, July 21, 2004$200,000 · 78 kt wind · 1 event
- Hail and Damaging Winds in Michigan, July 21, 2004$110,000 · 53 kt wind · 8 events
- Damaging Winds in Wisconsin, July 21, 2004$70,000 · 65 kt wind · 4 events
- Damaging Winds in Kansas, July 21, 2004$45,000 · 65 kt wind · 3 events
- Damaging Winds in Indiana, July 21, 2004$23,000 · 65 kt wind · 16 events
- Hail and Damaging Winds in Minnesota, July 21, 2004$20,000 · 1.75 in hail · 6 events
- Hail and Damaging Winds in Illinois, July 21, 200460 kt wind · 18 events
- Marine Thunderstorm Winds in Lake Michigan, July 21, 2004$20,000 · 60 kt wind · 3 events
- Hail and Damaging Winds in Minnesota, July 21, 200460 kt wind · 11 events
- Flash Flood and Hail in Indiana, July 21, 20041 in hail · 10 events
- Wildfire in California, July 21, 20041 injured · 1 event
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: 5432058.