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 Sep 3, 7:53 PM PST, 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 853 PM PDT WED SEP 3 2003 .SYNOPSIS...HIGH PRESSURE OVER THE DESERT SOUTHWEST WILL CONTINUE TO KEEP MONSOON MOISTURE OVER THE AREA THROUGH FRIDAY. THIS WILL ALLOW AFTERNOON AND EVENING THUNDERSTORMS TO FORM OVER THE SOUTHERN GREAT BASIN AND MOJAVE DESERT. HOWEVER BY SATURDAY MUCH DRIER AIR WILL BEGIN TO MOVE OVER THE AREA AS A STRONG LOW PRESSURE SYSTEM BEGINS TO FORM OFF THE PACIFIC NORTHWEST COAST. && .SHORT TERM...BOUNDARY INTERACTION HAS KEPT THUNDERSTORMS GOING IN FAR WESTERN SAN BERNARDINO COUNTY THIS EVENING BUT DO EXPECT THESE TO WEAKEN IN THE NEXT SEVERAL HOURS. HAVE HAD NO REPORTS FLOODING AND WITH STORMS WEAKENING WILL ALLOW FLASH FLOOD WATCH TO EXPIRE AT 900 PM. TAKING A LOOK AT THE 00Z PLOT DATA AND ETA MODEL AM CONVINCED THAT AREA WILL CONTINUE TO SEE A FEW SHOWERS/THUNDERSTORMS OVERNIGHT. WATER VAPOR IMAGERY SHOWS DISTURBANCE ALOFT MOVING ACROSS SOUTHERN CALIFORNIA WITH 00Z PLOT DATA INDICATING 40 KNOT SPEED MAX FROM SAN DIEGO SOUNDING. KESX RADAR TRENDS HAVE SHOWN INCREASING REFLECTIVITY VALUES AND TOPS COOLING ON INFRARED IMAGERY. ACTIVITY WILL NOT BE AS VIGOROUS AS NOCTURNAL STORMS EARLY TUESDAY MORNING BUT AGAIN CAN NOT RULE OUT AREAS GETTING A LIGHT SHOWER AND POSSIBLY THUNDER TONIGHT. WEAK RIPPLES IN THE ATMOSPHERE WITH LITTLE CHANGE IN MOISTURE VALUES WILL ALLOW FOR STORM DEVELOPMENT TOMORROW AFTERNOON/EVENING. UPDATE WILL BE OUT SHORTLY TO DROP FLASH FLOOD WATCH AND KEEP LOW POPS GOING OVERNIGHT PER LATEST THINKING. && .LAS...NONE. && PIERCE
AZZ001>003-036-CAZ026>029-NVZ013>022-041300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 635 AM PDT WED SEP 3 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST CALIFORNIA/SOUTHERN NEVADA/NORTHWEST ARIZONA .DAY ONE...WEDNESDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. A MOIST AND UNSTABLE AIR MASS DOES REMAIN IN PLACE TODAY FOR SCATTERED AFTERNOON THUNDERSTORMS...ESPECIALLY OVER THE MOUNTAINS. SOME OF THESE STORMS MAY PRODUCE LOCALIZED BRIEF HEAVY RAIN. DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION IS NOT ANTICIPATED BUT WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Las Vegas radar (KESX), 102 km away, was scanning. The volume nearest the first event began at 04:24 UTC.
1 flash flood. Local standard time, as filed.
Runoff from heavy rain caused a car to be swept off the road into a wash. One woman inside the car was rescued and taken to a local hospital with undisclosed injuries.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2003Every state in 2003This day in weather historyWarnings in Arizona, September 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: 5374767.