1 heavy rain, 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 19, 2:30 AM PST, 11 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RENO NV 330 AM PDT THU AUG 19 2004 .SHORT TERM... A WEAK RIDGE IS PROGGED TO STAY OVER THE WESTERN CONUS TODAY BEFORE STARTING TO BREAK DOWN ON FRIDAY. AIR MASS IS MOIST OVER THE WESTERN GREAT BASIN WITH PRECIP WATER VALUES OF 0.5 TO 1.0 INCH. AFTERNOON HEATING TODAY WILL HELP THUNDERSTORMS DEVELOP OVER MOST OF THE KREV CWFA. A SHORTWAVE MOVING THROUGH SOUTHERN OREGON THIS EVENING WILL ALSO ADD DYNAMICS WHICH WILL HELP CONVECTION CONTINUE. GREATEST INSTABILITY WILL BE IN NORTHERN PART OF CWFA NEAR OREGON BORDER. BUFKIT SHOWS CAPE VALUES OF OVER 200 J/KG FROM NOON THROUGH 7PM THIS EVENING. LIFTED INDICES ARE ALSO BELOW -1 DURING THIS SAME PERIOD. BY FRIDAY AN UPPER LOW IS PROGGED TO FORM OFF THE CALIFORNIA COAST. SOUTHERLY FLOW EAST OF THIS SYSTEM WILL BRING MOISTURE INTO THE REGION...KEEPING PRECIP WATER VALUES NEAR 1.0 INCH. THE AIR MASS WILL REMAIN UNSTABLE WITH THUNDERSTORMS POSSIBLE ACROSS THE ENTIRE CWFA...ESPECIALLY IN EASTERN ZONES. THE UPPER LOW WILL REMAIN FAIRLY STATIONARY OFF THE CALIFORNIA COAST ON SATURDAY. THIS SCENARIO WILL KEEP SOUTHERLY FLOW OVER THE WESTERN GREAT BASIN WITH MOIST UNSTABLE CONDITIONS CONTINUING. WILL CONTINUE WITH FORECAST OF CHANCE OF TSRA IN EASTERN ZONES AND SLIGHT CHANCE NEAR THE SIERRA. TEMPERATURES WILL CONTINUE SLIGHTLY ABOVE NORMAL. OHARA .LONG TERM...SUNDAY THROUGH WEDNESDAY... LESS AMPLIFIED TROUGH FORECAST BY LATEST GFS INTO PAC NW THIS SUNDAY AS ENERGY BEGINS TO UNDERCUT THE RIDGE OVER ALASKA. POOR RUN TO RUN CONSISTENCY OF MED RANGE MODELS AND WIDE RANGE OF ENSEMBLE SOLUTIONS DUE TO SEVERAL REASONS. ONE IS TYPICAL POOR HANDLING OF SPLIT FLOW REGIMES IN ERN PACIFIC. ANOTHER IS DEVELOPING SFC LOW IN WRN PAC FROM REMAINS OF TYPHOON MEGI MOVG ACROSS KOREA. MODELS HAVE DIFFICULTY IN PHASING NRN AND SRN LATITUDE WAVE TRAINS AND CONVERTING LATENT HEAT TO KINETIC ENERGY OF JET STREAM OR DEEPENING OF SFC LOW AS TYPHOON BECOMES EXTRA TROPICAL. THUS LOW CONFIDENCE IN DEPTH OF TROUGH NEXT WEEK. HAVE STUCK WITH CURRENT TEMPS/MOS WHICH SUGGEST SOME COOLING WITH LOWERING HEIGHTS. KEPT IN SLIGHT CHANCE POPS FOR MONO..MINERAL AND NRN WASHOE COUNTIES SUNDAY AND MONDAY WITH LINGERING MOISTURE/INSTABILITY AND CONVERGENCE PATTERN. GFS KEEPS DRY WLY FLOW AND STABLE LIS FOR TUES-WED PERIOD...ALTHOUGH THAT COULD CHANGE IF WEAK UPPER LOW OFF CENTRAL CA CST TAPS INTO SUBTROPICAL MOISTURE OR KICKS INLAND AHEAD OF DIGGING TROUGH OVER PAC NW. KEPT PREVIOUS GRIDS AND FORECAST INTACT TO AVOID YO-YOING AND HOPE FOR BETTER CONSISTENCY TO DEVELOP IN FUTURE MODEL RUNS. CYLKE && .REV WATCHES/WARNINGS/ADVISORIES... .NV...NONE. .CA...NONE. &&
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
A total of 0.86 inches of rainfall (0.78 inches in one hour) was recorded at the RAWS sensor in Dog Valley.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2004Every state in 2004This day in weather historyWarnings in California, August 2004
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: 5432069.