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 Las Vegas, NV wrote its last area forecast discussion before the first event at Aug 26, 8:45 AM PST, 4 hours 24 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 945 AM PDT TUE AUG 26 2003 .SYNOPSIS...MONSOON MOISTURE OVER THE SOUTHERN GREAT BASIN AND MOJAVE DESERT WILL RESULT IN SCATTERED SHOWERS AND THUNDERSTORMS TODAY. MONSOON MOISTURE LINGERS ACROSS SOUTHEAST NEVADA...EASTERN CALIFORNIA AND NORTHWEST ARIZONA WEDNESDAY AND THURSDAY FOR CONTINUED CHANCE OF MAINLY AFTERNOON AND EVENING THUNDERSTORMS. && .SHORT TERM...SHORTWAVE MOVING ONSHORE INTO NORTHERN CALIFORNIA THIS MORNING WITH VORTICITY LOBE EXTENDING SOUTHEAST INTO ARIZONA. VORTICITY LOBE/H250 SPEED MAX HAS AREA UNDER LARGE SCALE ACCENT WITH SCATTERED SHOWERS/THUNDERSTORMS LIFTING NORTH ACROSS THE AREA. NOTHING HEAVY AS OF YET WITH STORMS PRODUCING GENERALLY UNDER A QUARTER OF AN INCH. SKIES MOSTLY CLEAR FROM KINGMAN WEST TO BARSTOW RIGHT NOW. SATELLITE SHOWS THIS AREA LIFTING NORTH TOWARD SOUTHERN NEVADA. DUE TO DIFFERENTIAL HEATING EXPECT THIS AREA TO BECOME QUITE ACTIVE LATER AS DEEPER MONSOON MOISTURE/UNSTABLE AIR LIES ACROSS THE FAR SOUTHERN ZONES. NOT SURE HOW EARLIER RAIN AND COOLING OF THE BOUNDARY LAYER WILL EFFECT DEVELOPMENT IN CLARK COUNTY. RIGHT NOW WILL MAKE SOME TWEAKS TO TODAYS TEMPERATURES DUE CLOUDS AND RAIN. UPDATED FLOOD STATEMENT ALREADY OUT ADDRESSING FLASH FLOOD WATCH. && .LAS...FLASH FLOOD WATCH FROM NOON UNTIL 900 PM PDT TODAY. PLEASE SEE LATEST STATEMENT FOR DETAILS. && PIERCE
AZZ001>003-036-CAZ026>029-NVZ013>022-271200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 510 AM PDT TUE AUG 26 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST CALIFORNIA/SOUTHERN NEVADA/NORTHWEST ARIZONA .DAY ONE...TODAY. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY WITH LOCALLY HEAVY RAIN POSSIBLE. A FLASH FLOOD WATCH IS IN EFFECT FROM NOON UNTIL 900 PM PDT THIS EVENING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. DRIER AIR TO MOVE OVER THE NORTHERN PORTION OF THE AREA ON WEDNESDAY FOR A DECREASE IN CONVECTION...HOWEVER LOCALLY HEAVY RAIN MAY STILL ACCOMPANY THUNDERSTORM ACTIVITY...ESPECIALLY OVER THE SOUTHEAST PORTION. BY THURSDAY THUNDERSTORMS WILL BE CONFINED TO MAINLY NORTHWEST ARIZONA WHICH SHOULD SEE AFTERNOON AND EVENING THUNDERSTORMS INTO SATURDAY. SUNDAY AND MONDAY SHOULD BE DRY ACROSS THE ENTIRE AREA.
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Flash flooding caused Highway 62 northeast of Twentynine Palms to be completely washed out and impassable. An estimated 2.50 inches of rain fell in about two hours.
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, 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: 5377477.