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 Jul 26, 2:55 PM PST, 35 minutes earlier.
MOJAVE DESERT/SOUTHERN GREAT BASIN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 355 PM PDT SAT JUL 26 2003 .SYNOPSIS...A MOIST UNSTABLE AIRMASS WILL REMAIN OVER THE SOUTHERN GREAT BASIN AND MOJAVE DESERTD...RESULTING IN SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ACROSS THE AREA. SOME STORMS HAVE THE POTENTIAL OF PRODUCING HEAVY RAIN. .DISCUSSION...DEEP CONVECTION BROKE THROUGH THIS AFTERNOON ASSISTED BY DIVERGENCE ALOFT IN THE RIGHT ENTRANCE REGION OF A JETSTREAK OVER CENTRAL NEVADA. BOUNDARY LAYER HEATING AND COOL ADVECTIN IN THE 300-500MB LAYER ENHANCED DESTABILIZATION AND STORMS ARE BEING FUELED BY PW IN THE 1.0-1.5 RANGE. MT CHARLESTON RECEIVED ALMOST 2 INCHES OF RAIN AS TRAINING CELLS PROPAGATED ALONG THE SPINE OF THE SPRING RANGE. A SECOND AREA OF TRAINING OCCURRED FOR A WHILE JUST SOUTHEAST OF PRIMM BUT THAT APPEARS TO BE WEAKENING NOW. SEVERAL HORIZONTAL ROLLS EVIDENT IN RADAR IMAGERY...ANY OF WHICH COULD BECOME THE NEXT WEDGE OF REPEAT ECHOES. IN ADDITION TO THIS BATCH OF CONVECTION WELL NEED TO MONITOR THE EVOLUTION OF THE MCS IN SOUTHERN ARIZONA FOR THE POSSIBILITY OF MIDNIGHT STORMS MOVING INTO NORTHWEST ARIZONA. 850MB THETA RIDGE IS FORECAST TO EXTEND INTO MOHAVE COUNTY LATE TONIGHT AND STEERING FLOW WILL BE OUT OF THE SOUTHEAST. ONCE SURFACE FLOW DECOUPLES THE WIND JUST ABOVE THE INVERSION LAYER IS FORECAST TO BE OUT OF THE WSW WHICH WILL PRODUCE A FAVORABLE STORM RELATIVE INFLOW OF HIGH CAPE AIR INTO THE LEADING EDGE OF THE MCS. DIFFICULT TO SAY AT THIS POINT WHETHER THE SYSTEM WILL REMAIN INTACT THAT LONG BUT IT LOOKS QUITE HEALTHY NOW. DAY 2 AND 3...500MB HIGH PRESSURE IS FORECAST TO SETTLE OVER NORTHCENTRAL OR NORTHEASTERN NEVADA...DEPENDING ON THE MODEL...BRINGING AN EAST TO NORTHEAST UPPER FLOW INTO THE SOUTHERN CWA. THE MOIST AND UNSTABLE CONDITIONS EXPECTED TO CONTINUE BOTH DAYS WITH PW VALUES OF 1.2 TO 1.7 INCHES AND ZERO TO NEGATIVE LIS FORECAST FROM THE LAS VEGAS VALLEY AND SOUTH. MODELS CONTINUE TO SHOW AN WESTERLY MOVING INVERTED TROUGH MOVING ALONG THE BASE OF THE HIGH INTO THE SOUTHERN CWA BY MONDAY. A 50-KT JET STREAK IS ALSO FORECAST TO NOSE INTO THE SOUTHERN AREAS MONDAY WITH THE SOUTHERN FORECAST ZONES IN THE RIGHT ENTRANCE REGION OF THE JET TUESDAY AFTERNOON. THIS SHOULD HELP PROVIDE SOME UPPER SUPPORT FOR STORMS MOVING OUT OF THE MOUNTAINOUS REGIONS OF SOUTHERN UTAH AND NORTHERN ARIZONA AND INTO OUR AREA. EXTENDED MODELS SHOW SOME CHANGE IN THE OVERALL PATTERN AS THE HIGH PRESSURE CENTER WHICH IS FORECAST TO REMAIN OVER NORTHERN NEVADA EARLY IN THE EXTENDED SLOWLY SHIFTS EAST TOWARD THE 4-CORNERS REGION. HOWEVER...MOISTURE WILL CONTINUE TO BE DRAWN NORTHWARD INTO THE CWA AND WILL KEEP THE MENTION OF THUNDERSTORMS THROUGH THE ENTIRE EXTENDED PERIOD. EXTENDED PERIOD LARGELY UNCHANGED. .LAS...FLASH FLOOD WATCH TODAY UNTIL 8 PM PDT/MST. PLEASE REFER TO THE LATEST STATEMENT FOR FURTHER DETAILS. RUNK/SALMEN/GORELOW
AZZ001>003-036-CAZ026>029-NVZ013>022-271200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 745 AM PDT SAT JUL 26 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST CALIFORNIA/SOUTHERN NEVADA/NORTHWEST ARIZONA .DAY ONE...TODAY A FLASH FLOOD WATCH IS IN EFFECT FROM 11 AM UNTIL 8 PM TODAY FOR MUCH OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA. MOIST UNSTABLE AIR WILL SUPPORT THUNDERSTORM DEVELOPMENT OVER THE REGION AS A DISTURBANCE EMBEDDED IN SOUTHERLY FLOW MOVES ACROSS SOUTHERN CALIFORNIA THIS AFTERNOON. SOME THUNDERSTORMS ARE EXPECTED TO PRODUCE MODERATE TO HEAVY RAINFALL WITH WASHES RISING QUICKLY. FOR FURTHER DETAILS PLEASE REFER TO THE FLASH FLOOD WATCH ISSUED BY THIS OFFICE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY MOISTURE WILL CONTINUE TO CIRCULATE AROUND THE MOJAVE DESERT AND SOUTHERN GREAT BASIN THROUGH THE PERIOD. ISOLATED TO SCATTERED AFTERNOON AND NIGHTTIME THUNDERSTORMS WILL CONTINUE FOR PARTS OF THE REGION. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION IS POSSIBLE TODAY. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
CHP reported a car stuck in flash flooding on Highway 127 south of Baker. Occupants were safe.
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: 5367466.