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 Jul 30, 2:00 PM PST, 3 hours earlier.
WESTERN NEVADA AND EASTERN CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RENO NV 300 PM PDT WED JUL 30 2003 WITH AN UPPER TROUGH OVER THE ERN U.S. A STRONG RIDGE STILL DOMINATES THE WRN U.S. ALTHOUGH SOME DAY TO DAY CHANGES ALTER THE THUNDERSTORM COVERAGE AND TEMPERATURES. THIS AFTERNOON... THE AIRMASS IS A LITTLE MORE STABLE ACROSS NRN NV. A SLIGHT CHANCE OF THUNDERSTORMS IS EXPECTED ACROSS WRN NV THIS EVENING EXCEPT FOR PERSHING AND NORTHERN CHURCHILL COUNTY. ISOLATED EVENING THUNDERSTORMS OVER NE CA ARE MAINLY OVER THE HIGHER TERRAIN. THUNDERSTORMS WITH LOCAL HEAVY SHOWERS ARE INDICATED FOR THE SIERRA FROM GREATER TAHOE SOUTH. THE UPPER HIGH OVER NRN NV SHIFTS SE TO NEW MEXICO OR TEXAS THROUGH SATURDAY. THE FLOW ALOFT BECOMES A DEEP SE MONSOON PATTERN TONIGHT INTO THURSDAY. A SLIGHT CHANCE OF NOCTURNAL SHOWERS OR THUNDERSTORMS IS INDICATED SOUTH OF ABOUT RENO AND FALLON TONIGHT AS A WEAK VORTICITY MAXIMUM MOVES EAST FROM CENTRAL NV OVERNIGHT. THE PRECIPITABLE WATER IS INCREASING TONIGHT FROM THE SOUTH AND IS NEAR OR ABOVE AN INCH BY THURSDAY AFTERNOON AND REMAINS WET THROUGH SATURDAY. UPPER DIVERGENCE IN THE GFS SATURDAY FROM TAHOE SOUTH SUGGESTS AN INCREASING FLASH FLOOD RISK WITH RELATIVELY LIGHT SE WINDS ALOFT. A CHANCE OF NOCTURNAL SHOWERS OR THUNDERSTORMS CONTINUES THURSDAY NIGHT ALTHOUGH THE GFS SHOWS THE UPPER SUPPORT SHIFTING TO NE CA AND NRN NV. SCATTERED AND MAINLY DIURNAL THUNDERSTORMS CONTINUE SATURDAY AS AN UPPER TROUGH NEARS THE WEST COAST. THIS SYSTEM BRINGS SW FLOW ALOFT ACROSS THE SIERRA AND MAY SHIFT THE STORMS EAST AND OFF THE CREST IN THE LATE AFTERNOON. A LITTLE DAYTIME COOLING IS LIKELY WITH INCREASING CLOUD COVER THURSDAY INTO FRIDAY AND ALSO INTO SATURDAY AS THE TROUGH LOWERS HEIGHTS AND THICKNESS. OSTERMAN. IN THE EXTENDED...SUNDAY THROUGH WEDNESDAY...MEDIUM RANGE MODELS IN AGREEMENT WITH BREAKING DOWN STRONG UPPER RIDGE OVER NEVADA AND THE GREAT BASIN THRU THE PERIOD IN ADVANCE OF PACIFIC TROF. THE GFS AND UKMO MOST AGGRESSIVE WITH BRINGING TROF ONSHORE NRN CA BY TUESDAY MORNING... AND NORTHEAST INTO THE PACIFIC NORTHWEST WEDNESDAY. DRY AND STABLE SOUTHWEST FLOW AHEAD OF TROF BEGINS TO MOVE INTO THE AREA LATE SUNDAY AND BECOMES MORE PROMINENT MONDAY AND TUESDAY. SUNDAY KEPT SLIGHT CHANCE THUNDERSTORMS IN ALL ZONES... NOT CONFIDENT IN EARLY STRENGTH AND DRYING OF SOUTHWEST FLOW. BY MONDAY EXPECT SOUTHWEST FLOW TO INCREASE AND PUSH THUNDERSTORM CHANCES EAST OF THE SIERRAS AND OVER NRN ZONES AHEAD OF UPPER LEVEL ENERGY. STILL KEPT SLIGHT CHANCE THUNDERSTORMS ON TUESDAY ACROSS FAR NRN ZONES AS SHORTWAVE APPROACHES AND MOVES NORTHEAST OVER NRN CA... NWRN NV... SRN OR. MAINLY DIURNAL ACTIVITY EXPECTED DUE TO DRIER FLOW AND LACK OF DYNAMICS TO KEEP ACTIVITY GOING MUCH BEYOND SUNSET. BY WEDNESDAY EXPECT STABLE AND DRY CONDITIONS ACROSS ALL ZONES. TEMPERATURES WILL DROP IN ADVANCE OF TROF AND LOWERING HEIGHTS... HIGHS DOWN INTO THE UPPER 80S... A NEAR 5 DEGREES BELOW CLIMO. OVERNIGHT LOWS EXPECTED NEAR OR SLIGHTLY ABOVE CLIMO... IN THE MID 50S IN THE WRN VALLEYS. BENINATO .REV...NONE.
CAZ070>073-NVZ001>005-311400- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RENO NV 650 AM PDT WED JUL 30 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NEVADA...THE EASTERN SIERRA AND NORTHEASTERN CALIFORNIA. .DAY ONE...TODAY SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND PERSIST THROUGH THE EVENING. THERE IS THE POSSIBILITY OF ISOLATED AREAS OF LOCALLY HEAVY RAIN...SMALL HAIL... STRONG GUSTY WINDS AND DEADLY LIGHTNING ASSOCIATED WITH THESE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH SUNDAY THE MOIST AND UNSTABLE PATTERN CONTINUES TO CREATE THE POSSIBILITY FOR AFTERNOON AND EVENING THUNDERSTORMS OVER THE AREA THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ASKED TO REPORT SIGNIFICANT WEATHER CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.
The San Joaquin Valley radar (KHNX), 192 km away, was scanning. The volume nearest the first event began at 01:01 UTC.
1 flash flood. Local standard time, as filed.
The Mono County Sheriff reported flash flooding in the High Sierra of southwest Mono County. Several mud and rock slides closed Rock Creek Road. Several backcountry trails were washed out in places and a walk-in campground was damaged.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2003Every state in 2003This day in weather historyWarnings in California, July 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: 5376092.