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 15, 1:30 PM PST, 4 hours 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 230 PM PDT FRI AUG 15 2003 .SYNOPSIS...A LOW PRESSURE SYSTEM MOVING INTO ARIZONA WILL COMBINE WITH A MOIST AND UNSTABLE AIR MASS TO PRODUCE SHOWERS AND THUNDERSTORMS ACROSS MUCH OF THE REGION TONIGHT AND SATURDAY. THE LOW WILL BEGIN TO MOVE NORTHEAST SUNDAY WITH SOMEWHAT DRIER AIR MOVING IN FROM THE WEST. && .DISCUSSION...THUNDERSTORMS HAVE BEEN DEVELOPING NICELY THIS AFTERNOON IN THE AREA WHICH RECEIVED ABUNDANT SUNSHINE THIS MORNING AND EXPECT THIS DEVELOPMENT TO CONTINUE AND TO SPREAD TO THE SOUTHWEST TONIGHT. SO FAR THE STRONGEST STORMS HAVE BEEN IN REMOTE LOCATIONS OF NORTHERN MOHAVE COUNTY. BASED ON CURRENT SATELLITE AND RADAR TRENDS COMBINED WITH MODELS...CURRENT LOCATION OF FLASH FLOOD WATCH ACROSS MOST OF MOHAVE AND INTO FAR SOUTHEAST SAN BERNARDINO COUNTY LOOKS GOOD. THIS IS WHERE BEST MOISTURE AND INSTABILITY IS AND WHERE THE FLOW WILL LIKELY TAKE CURRENT CONVECTION. THUNDERSTORM CHANCES TAPER OFF FARTHER NORTHWEST AND EXPECT NO THUNDERSTORM ACTIVITY TONIGHT OVER ESMERALDA AND NORTHWEST NYE AND INYO COUNTIES. SOME STORMS MAY CLIP SOUTHEAST INYO COUNTY HOWEVER. STILL LOOKS MOIST AND FAIRLY UNSTABLE SATURDAY ACROSS THE EASTERN PORTION OF THE FORECAST AREA BUT NOT AS MUCH DYNAMICAL LIFT EXPECTED AS THE UPPER LOW WEAKENS. STILL LOOKS TOO DRY AND STABLE OVER THE WESTERN PORTION FOR ANY THUNDERSTORM DEVELOPMENT. MODELS DIFFER SOME FOR SUNDAY BUT GENERALLY LOOKS LIKE THE UPPER TROUGH MOVING EAST THROUGH THE PACIFIC NORTHWEST WILL HELP KICK OUR SOUTHWEST LOW TO THE NORTHEAST A BIT...ALLOWING SOME DRIER AIR TO MOVE IN FROM THE WEST. WILL LIMIT THUNDERSTORM CHANCES TO MAINLY MOHAVE AND LINCOLN COUNTY AND BRING TEMPS UP A BIT. && .LONG TERM...TUESDAY THROUGH FRIDAY WILL SEE A DRYING TREND AS SHORTWAVE RIDGING BUILDS IN AFTER DEPARTURE OF THE WEEKENDS TROUGH TO THE NORTHEAST. THERE WILL STILL BE SOME RESIDUAL MOISTURE IN MOHAVE COUNTY TUESDAY AND WEDNESDAY TO LEAVE IN SOME SLIGHT CHANCE POPS WHILE ELSEWHERE SOUTHWEST FLOW WILL BE RESPONSIBLE FOR SOME DRYING AND WARMING. CONCERN IS FOR THURSDAY AND FRIDAY AS GFS AND UKMET SHOW POTENTIAL OF DRAWING UP MOISTURE FROM THE SOUTH. NOT CONFIDENT OF THIS BUT HAVE UPPED POPS IN MOHAVE COUNTY THURSDAY TO REFLECT THIS. && .LAS...A FLASH FLOOD WATCH HAS BEEN ISSUED FOR MOHAVE AND EXTREME SOUTHEAST SAN BERNARDINO COUNTIES FROM NOON UNTIL 9 PM. && HARRISON/JACQUES
AZZ001>003-036-CAZ026>029-NVZ013>022-161300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 610 AM PDT FRI AUG 15 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST CALIFORNIA/SOUTHERN NEVADA/NORTHWEST ARIZONA .DAY ONE...TODAY A LOW PRESSURE SYSTEM MOVING EAST INTO ARIZONA TODAY WILL COMBINE WITH A MOIST AND UNSTABLE AIR MASS TO PRODUCE SCATTERED THUNDERSTORMS...WITH HEAVY RAIN POSSIBLE OVER NORTHWEST ARIZONA. A FLASH FLOOD WATCH IS IN EFFECT FOR MOHAVE COUNTY ARIZONA AND EXTREME SOUTHEAST SAN BERNARDINO COUNTY NEAR THE COLORADO RIVER FROM NOON UNTIL 9 PM THIS EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP SATURDAY ACROSS MUCH OF THE AREA AS THE LOW PRESSURE SYSTEM SLOWLY MOVES NORTH FROM ARIZONA INTO SOUTHERN UTAH. THE THREAT OF HEAVY RAIN WITH SOME STORMS MAY STILL EXIST ACROSS SOUTHERN NEVADA... NORTHWEST ARIZONA AND FAR SOUTHEAST CALIFORNIA. DRIER FLOW WILL SPREAD OVER THE REGION SUNDAY THROUGH THURSDAY FOR A DIMINISHING THREAT OF THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION IS NOT ANTICIPATED BUT WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Cedar City radar (KICX), 178 km away, was scanning. The volume nearest the first event began at 02:16 UTC.
1 flash flood. Local standard time, as filed.
An intense thunderstorm produced flash flooding in and around the town of Caliente. Several roads in town were impassable from mud and debris.
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: 5378065.