Lingering monsoon moisture triggered thunderstorms which brought isolated flooding to southern Nevada.
Every event with a place to put it. 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 episode as NWS VEF wrote it up.
Lingering monsoon moisture triggered thunderstorms which brought isolated flooding to southern Nevada.
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, 2:25 PM PST, 2 hours 17 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 325 PM PDT THU JUL 17 2008 .SYNOPSIS...A TEMPORARY CHANGE IN THE WEATHER PATTERN WILL BRING AN INCREASE IN TEMPERATURES AND A DECREASE IN CLOUD COVER AND SHOWER ACTIVITY FRIDAY AND SATURDAY. MONSOON MOISTURE IS EXPECTED TO RETURN SUNDAY AND INTO EARLY NEXT WEEK WITH THUNDERSTORM COVERAGE EXPANDING INTO THE AREA ONCE AGAIN. && SHORT TERM...A FLASH FLOOD WATCH CONTINUES OVER PORTIONS OF THE CWA THROUGH MIDNIGHT TONIGHT. AT 2 PM...THUNDERSTORMS HAD DEVELOPED OVER THE WESTERN AND SOUTHERN PORTIONS OF CLARK COUNTY AS WELL AS LINCOLN AND NORTHERN MOHAVE COUNTY. THE STORMS ARE GETTING BETTER ORGANIZED AND EXPECT THAT COVERAGE AND INTENSITY WILL INCREASE OVER THE NEXT COUPLE OF HOURS INCREASING THE RISK OF FLASH FLOODING. ABUNDANT MOISTURE AND WEAK TO MODERATE INSTABILITY IS RECEIVING DYNAMIC SUPPORT FROM AN UPPER LEVEL DISTURBANCE SPINNING OVER SOUTHERN CALIFORNIA. THIS AREA OF PVA IS FORECAST TO MOVE EAST THIS AFTERNOON AND OVERNIGHT POTENTIALLY SUPPORTING TSTORM DEVELOPMENT THROUGH THE EVENING HOURS. HIGH PRESSURE ALOFT CURRENTLY OFF THE WEST COAST TRANSITIONS EASTWARD TO CENTRAL CALIFORNIA FRIDAY AND WESTERN COLORADO ON SATURDAY IN RESPONSE TO A TROUGH MOVING ACROSS THE NORTHWESTERN STATES AND A DEEPENING UPPER TROUGH APPROACHING THE WEST COAST. THIS SHOULD DIMINISH IF NOT END THUNDERSTORM CHANCES OVER MOST OF THE AREA FRIDAY AND SATURDAY WITH THE POSSIBLE EXCEPTION OF MOHAVE COUNTY IN ARIZONA. SOME UNCERTAINTY TO THIS HOWEVER AS MODELS ARE HINTING AT A MOISTURE RETURN TO THE EXTREME SOUTHERN CWA AS EARLY AS SATURDAY AFTERNOON. .LONG TERM...MODEL CONSENSUS ON A SURGE OF NEW MOISTURE SUNDAY AND MONDAY INTO THE AREA AS ANOTHER WAVE MOVES WEST THROUGH NORTHERN MEXICO. HAVE INCREASED THE POP COVERAGE IN THE SOUTHEAST 2/3 OF THE CWA AS A RESULT AND LOWERED TEMPERATURES A FEW DEGREES AS WELL FOR THOSE TWO DAYS. AFTER THIS...CONFIDENCE IS DOWN A BIT AS THERE ARE DIFFERENCES ON HOW SOON AND THE STRENGTH OF SOUTHWEST FLOW SETS IN. HAVE LEFT IN THE AFTERNOON THUNDERSTORM CHANCE FOR MOHAVE COUNTY ON TUESDAY AS MOISTURE DOES LINGER THERE AFTER SOUTHWEST FLOW BEGINS. MIGHT BE ERRING IN DRYING THE AREA OUT TOO SOON. HAVE LEFT IN SOME SILENT POPS FOR OUR EAST ZONES THAT A LATER SHIFT MAY WISH TO INCREASE FOR THE SECOND HALF OF NEXT WEEK. && .AVIATION...FOR MCCARRAN...PRIMARY FORECAST PROBLEM IS WINDS CAUSED BY OUTFLOW BOUNDARIES. NEED TO WATCH FOR THUNDERSTORMS THAT FORM TO THE SOUTH TO SOUTHWEST AND MOVE INTO THE AREA. THE THUNDERSTORM THREAT FOR KLAS WILL PERSIST UNTIL 03Z THIS EVENING...BUT OUTFLOW BOUNDARIES COULD COULD CAUSE PROBLEMS FOR A FEW HOURS AFTER THAT. FRIDAY WILL SEE A GREATLY REDUCED CHANCE FOR THUNDERSTORMS AND ASSOCIATED WIND DIRECTION FORECASTING PROBLEMS. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...ISOLATED THUNDERSTORMS WILL CONTINUE THROUGH THE 02-03Z TIME FRAME THIS EVENING WITH THE GREATEST CONCENTRATION OVER THE MOUNTAIN AREAS. THE PRIMARY THREAT FORM THESE STORMS WILL BE BRIEF HEAVY RAIN AND STRONG OUT FLOWS FROM THEM. FRIDAY WILL SEE A REDUCE COVERAGE OF THUNDERSTORMS WITH THE BULK OF THEM IN MOHAVE COUNTY. && .VEF WATCHES/WARNINGS/ADVISORIES... NV...FLASH FLOOD WATCH UNTIL MIDNIGHT PDT TONIGHT FOR NVZ015>022. AZ...FLASH FLOOD WATCH UNTIL MIDNIGHT MST TONIGHT FOR AZZ001-036. CA...FLASH FLOOD WATCH UNTIL MIDNIGHT PDT TONIGHT FOR CAZ522-524. && SALMEN/JACQUES HTTP://WEATHER.GOV/LASVEGAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 546 AM PDT THU JUL 17 2008 AZZ001>003-036-CAZ519>527-NVZ014>022-180400- NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-EASTERN SIERRA SLOPES- OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY- DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT- EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN- SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY- ESMERALDA AND CENTRAL NYE COUNTY-LINCOLN COUNTY- NORTHEAST CLARK COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY- SHEEP RANGE-SPRING MOUNTAINS-LAS VEGAS VALLEY- SOUTHERN CLARK COUNTY- 546 AM PDT THU JUL 17 2008 /546 AM MST THU JUL 17 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST ARIZONA...CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT A MOIST AND UNSTABLE AIR MASS WILL REMAIN OVER THE AREA TODAY FOR SCATTERED...MAINLY AFTERNOON AND EVENING THUNDERSTORMS WITH LOCAL GUSTY WINDS. POSSIBLE BRIEF HEAVY RAIN MAY PRODUCE ISOLATED FLASH FLOODING OR URBAN FLOODING. THE BEST CHANCE OF THUNDERSTORMS WILL BE OVER NORTHERN MOHAVE COUNTY...CLARK AND LINCOLN COUNTIES AND SOUTHEAST INYO COUNTY. HOWEVER ISOLATED ACTIVITY POSSIBLE ACROSS ALL AREAS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY DRIER AIR WILL MOVE OVER THE AREA ON FRIDAY LIMITING THUNDERSTORMS TO MAINLY NORTHWEST ARIZONA AND EASTERN CLARK/LINCOLN COUNTIES. GENERALLY DRY CONDITIONS THEN EXPECTED INTO THE WEEKEND AND THE FIRST OF NEXT WEEK WITH THE EXCEPTION OF ISOLATED THUNDERSTORMS OVER MOHAVE COUNTY. MOISTURE MAY RETURN NEXT WEEK TO THE EASTERN PORTION OF THE REGION AS MOISTURE MOVES WEST ACROSS ARIZONA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED...HOWEVER SPOTTERS ARE ALWAYS ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER AS SOON AS IT IS SAFE TO DO SO.
The Las Vegas radar (KESX), 110 km away, was scanning. The volume nearest the first event began at 00:41 UTC.
1 flash flood. Local standard time, as filed.
U.S. Highway 95 was washed out at Clark County mile marker 112.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2008Every state in 2008This day in weather historyWarnings in Nevada, July 2008
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: 106542.