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.
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 Reno, NV wrote its last area forecast discussion before the first event at Aug 2, 9:00 AM PST, 2 hours 30 minutes earlier.
WESTERN NEVADA AND EASTERN CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
1000 AM PDT SAT AUG 2 2003
WITH A WEAK UPPER TROUGH OVER CA TODAY...THE AIRMASS OVER NV REMAINS
VERY MOIST AND UNSTABLE. PRECIPITABLE WATER IS NEAR AN INCH...
POSSIBLY LOWERING A LITTLE SOUTH. K VALUES AS AN INDICATOR OF HEAVY
RAIN POTENTIAL IS HIGH AND HAS AN AXIS MAXIMUM K FROM SW NV OR ABOUT
MONO COUNTY NE INTO CENTRAL NV. CONSIDERABLE LOW CLOUDS FOLLOWING
AN AREA OF PRECIPITATION NWD OVER NW NV EARLIER THIS MORNING SHOULD
SLOW THE HEATING AND THUNDERSTORM DEVELOPMENT ACROSS THE NORTH BUT
THERE IS UPPER DIVERGENCE FORECAST OVER NRN CA THROUGH THIS
AFTERNOON AND PRECIPITABLE WATER IS HIGHEST THERE. SOME CLEARING
FROM THE SOUTH BEGINS OVER MONO AND MINERAL COUNTIES THIS MORNING.
LIFTED INDICES THERE IN THE MESOETA APPROACH A MINUS 4 DURING THE
AFTERNOON. 500 MB WINDS ARE 10-15 KTS WHICH MAY BE MARGINAL FOR
PROMOTING A HIGHER FLASH FLOOD POTENTIAL WITH SLOW MOVING CELLS
BUT DYNAMICS WITH THE TROUGH AND AVAILABLE MOISTURE SUGGEST A FLASH
FLOOD WATCH IS IN ORDER FOR THE CWA THROUGH 9 PM. DRYING AND
GRADUAL STABILIZATION FOLLOW TONIGHT WITH INCREASING SW FLOW ALOFT.
DRYING CONTINUES SUNDAY ALTHOUGH WITH A CHANCE OF MAINLY AFTERNOON
THUNDERSTORMS...MOST LIKELY EAST OF THE SIERRA CREST. OSTERMAN
.REV...FLASH FLOOD WATCH NORTHEAST CA EASTERN SIERRA AND WESTERN NV
CAZ 070>073 AND NVZ 001>005...UNTIL 9 PM.CAZ070>073-NVZ001>005-031400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RENO NV 645 AM PDT FRI AUG 01 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NEVADA...THE EASTERN SIERRA AND NORTHEASTERN CALIFORNIA. .DAY ONE...TODAY MOIST AND UNSTABLE CONDITIONS OVER WESTERN NEVADA AND EASTERN CALIFORNIA WILL PRODUCE SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH SATURDAY THE MOIST AND UNSTABLE CONDITIONS WILL CONTINUE THROUGH EARLY IN THE WEEK WITH DRIER CONDITIONS RETURNING ACROSS THE REGION BY MIDWEEK. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION MAY BE REQUIRED FOR THE FLASH FLOOD THREAT THIS AFTERNOON. WEATHER SPOTTERS ARE ASKED TO REPORT SIGNIFICANT WEATHER CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.
CAZ072-NVZ002-021730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RENO NV 915 AM PDT SAT AUG 2 2003 ...A WATER SPOUT ON LAKE TAHOE... AT 900 AM THE COAST GUARD AT LAKE TAHOE PASSED A REPORT FROM BOATERS NEAR SAND HARBOR OF A FUNNEL CLOUD THAT TOUCHED DOWN AS A BRIEF WATER SPOUT 1 MILE WEST OF SAND HARBOR. THE WATER SPOUT THEN LIFTED AND DISSIPATED. DUE TO THE VERY MOIST AND UNSTABLE AIRMASS OVER THE AREA...SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THROUGH THE DAY. WHILE WATER SPOUTS DO OCCUR OVER LAKE TAHOE...THEY SELDOM APPROACH THE SHORE BUT ALL PERSONS ON AND AROUND THE LAKE SHOULD REMAIN ALERT AND SEEK SAFE HARBOR OR SHELTER IF THREATENING WEATHER APPROACHES. LEO
The Reno radar (KRGX), 103 km away, was scanning. The volume nearest the first event began at 19:29 UTC.
1 flash flood. Local standard time, as filed.
Nearly three-quarters of an inch of rain fell in the Spanish Springs area in 15 minutes. Minor flash flooding was reported in the area including mud and water across roadways and drainage ditches running full.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2003Every state in 2003This day in weather historyWarnings in Nevada, August 2003
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: 5374978.