1 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 17, 2:32 PM PST, 2 hours 28 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 332 PM PDT SAT JUL 17 2004 .SYNOPSIS...SEVERAL WEAK DISTURBANCES EMBEDDED IN A SOUTHERLY FLOW ALOFT WILL INTERACT WITH MONSOON MOISTURE IN PLACE TO PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS MAINLY OVER THE MOUNTAINS THIS EVENING AND SUNDAY. A LOW PRESSURE SYSTEM WILL BE ALONG THE WEST COAST MONDAY AND TUESDAY WITH WINDS MORE FROM THE SOUTHWEST. HOWEVER...ENOUGH RESIDUAL MOISTURE WILL REMAIN THAT ISOLATED THUNDERSTORMS NEAR THE MOUNTAINS ARE POSSIBLE. TEMPERATURES WILL STAY A FEW DEGREES BELOW NORMAL. && .SHORT TERM...WATER VAPOR IMAGERY SHOWS WEAK DISTURBANCE OVER EASTERN CALIFORNIA DESERTS THIS AFTERNOON. WITHIN THE PAST TWO HOURS STARTING TO GET DEVELOPMENT ALONG THE LEADING EDGE FROM MOUNTAIN PASS NORTHWARD INTO THE SPRING MOUNTAINS AND SHEEP RANGE. 12Z DESERT ROCK SOUNDING THIS MORNING AGAIN SHOWED WEAK SHEAR BETWEEN SFC-400 MB. THIS SIMILAR TO THURSDAY WERE STORMS HAD A DIFFICULT TIME HOLDING TOGETHER COMING OFF THE MOUNTAINS. UNKNOWN IS HOW SHEAR PROFILE HAS CHANGED WITH APPROACH OF WEAK DISTURBANCE? RADAR LOOP SUGGESTS THAT STORMS AGAIN TODAY ARE HAVING A DIFFICULT TIME COMING OFF THE MOUNTAINS AND INTO THE LOWER VALLEYS. MOHAVE COUNTY RELATIVELY QUITE TODAY AND APPEARS THAT CAN BE CONTRIBUTED WITH WEAK AREA OF SUBSIDENCE ALONG EAST SIDE OF WEAK DISTURBANCE. THE SOUTHERN SIERRA MORE ACTIVE TODAY THAN PREVIOUS DAYS AS MOISTURE HAS FINALLY WORKED NORTHWESTWARD. MODELS STILL SHOWING WEAK TROUGH WORKING INTO NORTHERN CALIFORNIA/PACIFIC NORTHWEST MONDAY AND TUESDAY WITH HIGH CENTER OVER EAST CENTRAL NEW MEXICO REPOSITIONING ITSELF NEAR EL PASO. WINDS ALOFT WILL BECOME MORE SOUTHWESTERLY...HOWEVER...LOW LEVEL MOISTURE WILL NOT BE SCOURED OUT SO WILL KEEP ISOLATED STORMS IN THE FORECAST ESPECIALLY IN ZONES WITH HIGHER TERRAIN. FEATURE OF INTEREST THIS AFTERNOON IS MCV OVER NORTHWEST SONORA. ETA WAS CLOSET WITH ITS DEPICTION OF SOME WEAK FEATURE MOVING NORTHWARD THROUGH SOUTHWEST ARIZONA TONIGHT AND INTO MOHAVE COUNTY SUNDAY. NOT SURE WHAT IMPACT WILL BE SO LATER SHIFTS WILL NEED TO MONITOR SITUATION. && .LONG TERM...BY WEDNESDAY MORNING MODELS AGREE ON SOUTHWEST FLOW BEING JUST ABOUT FINISHED AS RIDGE CENTERED SOUTH OF THE FOUR CORNERS REBUILDS. THE HIGH REMAINS NEAR THIS POSITION FOR THE REST OF THE FORECAST PERIOD. AT THE SAME TIME GFS PERSISTS AGAIN TODAY IN HAVING AN INVERTED TROUGH MOVING WEST OVER MEXICO AND INTO GULF OF CALIFORNIA WEDNESDAY / THURSDAY. THIS PATTERN WOULD INDICATE AN INCREASE IN MOISTURE FOR OUR AREA AT LEAST THE SOUTHERN PARTS. HAVE INCREASED POPS THURSDAY IN MOHAVE COUNTY AND IN THE SOUTHERN NEVADA MOUNTAINS IN RESPONSE. ALSO COOLED TEMPERATURES A LITTLE ALSO IN THE EXTENDED. && .AVIATION...THUNDERSTORMS ARE AGAIN POSSIBLE IN THE LAS VEGAS VALLEY LATE THIS AFTERNOON AND EVENING. ANY STORM TO CROSS KLAS WILL MOVE SOUTH TO NORTH. SUNDAY WILL ALSO SEE A CHANCE FOR THUNDERSTORMS BUT THE CHANCE WILL BE MUCH LESS THAN TODAY. && .VEF WATCHES/WARNINGS/ADVISORIES... .NV...NONE. .AZ...NONE. .CA...NONE. && PIERCE/JACQUES
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 1018 AM PDT SAT JUL 17 2004 AZZ001>003-036-CAZ026>029-NVZ014>022-180700- DEATH VALLEY NATIONAL PARK-ESMERALDA AND CENTRAL NYE COUNTY- LAKE HAVASU AND FORT MOJAVE-LAKE MEAD NATIONAL RECREATION AREA- LAS VEGAS VALLEY-LINCOLN COUNTY-NORTHEAST CLARK COUNTY- NORTHWEST DESERTS-NORTHWEST PLATEAU- OWENS VALLEY AND ADJACENT EASTERN SIERRA SLOPES- SAN BERNARDINO COUNTY DESERTS-SAN BERNARDINO COUNTY- UPPER COLORADO RIVER VALLEY-SHEEP RANGE-SOUTHERN CLARK COUNTY- SPRING MOUNTAINS-RED ROCK CANYON- WESTERN CLARK AND SOUTHERN NYE COUNTY- 1018 AM PDT (1018 AM MST) SAT JUL 17 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHERN CALIFORNIA/SOUTHERN NEVADA AND NORTHWEST ARIZONA .DAY ONE...TODAY. A WEAK DISTURBANCE OVER EASTERN CALIFORNIA WILL AID IN THE DEVELOPMENT OF SCATTERED SHOWERS AND THUNDERSTORMS TODAY. THE STORMS ARE CAPABLE OF PRODUCING 0.25-0.50 OF AN INCH OF RAIN AN HOUR. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
145 PM PDT SAT JUL 17 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0645 PM TSTM WND DMG NEEDLES 34.81N 114.61W
07/16/2004 SAN BERNARDINO CA FIRE DEPT/RESCUE
TELEPHONE POLES SNAPPED AT THE 4 FOOT LEVEL FROM
THUNDERSTORM WINDS
0645 PM TSTM WND DMG NEEDLES 34.81N 114.61W
07/16/2004 SAN BERNARDINO CA FIRE DEPT/RESCUE
SEMI TRUCK BLOWN OVER ON EAST SIDE OF TOWN BY
THUNDERSTORM WINDS
&&
JACQUESPRELIMINARY LOCAL STORM REPORT ... SUMMARY
NATIONAL WEATHER SERVICE LAS VEGAS NV
148 PM PDT SAT JUL 17 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0355 PM DOWNBURST KINGMAN 35.21N 114.03W
07/16/2004 MOHAVE AZ LAW ENFORCEMENT
ARIZONA HIGHWAY PATROL EST. 60 MPH NEAR KINGMAN. HEAVY
RAIN AND HALF MILE IN VISIBLITY.
0645 PM TSTM WND DMG NEEDLES 34.81N 114.61W
07/16/2004 SAN BERNARDINO CA FIRE DEPT/RESCUE
SEMI TRUCK BLOWN OVER ON EAST SIDE OF TOWN BY
THUNDERSTORM WINDS
0645 PM TSTM WND DMG NEEDLES 34.81N 114.61W
07/16/2004 SAN BERNARDINO CA FIRE DEPT/RESCUE
TELEPHONE POLES SNAPPED AT THE 4 FOOT LEVEL FROM
THUNDERSTORM WINDS
0650 PM TSTM WND GST NEEDLES 34.81N 114.61W
07/16/2004 60 MPH SAN BERNARDINO CA TRAINED SPOTTER
0655 PM TSTM WND DMG MOHAVE VALLEY 34.93N 114.59W
07/16/2004 MOHAVE AZ FIRE DEPT/RESCUE
5 FORTY FOOT POLES DOWN
&&
JACQUESThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Heavy rains in the Las Vegas valley helped to produce flooding of area roadways.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2004Every state in 2004This day in weather historyWarnings in Nevada, July 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: 5411319.