An unseasonable upper level low moving in from the Pacific helped trigger thunderstorms over eastern California and adjacent areas of western Nevada. Isolated severe weather and flash flooding occurred.
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 episode as NWS VEF wrote it up.
An unseasonable upper level low moving in from the Pacific helped trigger thunderstorms over eastern California and adjacent areas of western Nevada. Isolated severe weather and flash flooding occurred.
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 9, 2:00 PM PST, 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 300 PM PDT THU JUL 9 2015 .SYNOPSIS...LOW PRESSURE ALONG THE CENTRAL CALIFORNIA COAST WILL CONTINUE TO SPREAD DRIER...COOLER AIR ACROSS THE SOUTHERN HALF OF THE FORECAST AREA FRIDAY THROUGH THE WEEKEND. THERE WILL STILL BE ENOUGH MOISTURE AVAILABLE OVER PORTIONS OF INYO COUNTY AND CENTRAL NYE COUNTIES TO GENERATE ISOLATED THUNDERSTORMS FRIDAY AFTERNOON...BUT DRY CONDITIONS EXPECTED EVERYWHERE BY SATURDAY. TEMPERATURES WILL REMAIN BELOW NORMAL THROUGH THE WEEKEND...BUT START TO CLIMB CLOSER TO NORMAL BY EARLY NEXT WEEK. && .SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT... UPPER LOW MOVING INTO CENTRAL CALIFORNIA HAS HELPED GENERATE FAIRLY WIDESPREAD THUNDERSTORMS OVER INYO COUNTY TODAY. THE NORTHERN HALF OF INYO COUNTY HAD A FAIRLY ACTIVE MORNING WITH STRONG LIFT AND INSTABILITY...BUT THE FOCUS HAS SHIFTED EAST AND SOUTH DURING THE AFTERNOON WITH DEATH VALLEY NATIONAL PARK AND ESMERALDA COUNTY SEEING THE BEST DYNAMICS. THE STORMS OVER THOSE AREAS HAVE VERY LITTLE MOVEMENT AND FLASH FLOODING WILL REMAIN A CONCERN INTO THE EARLY EVENING. FOR THE REMAINDER OF THE AREA THERE HAVE BEEN A FEW STORMS DEVELOPING OVER PORTIONS OF CLARK...NYE AND LINCOLN COUNTIES...BUT THOSE STORMS HAVE BEEN MOVING FAIRLY QUICKLY AND SO FAR HAVE NOT CAUSED ANY PROBLEMS. THE MAIN SHORTWAVE ASSOCIATED WITH THE LOW WILL LIFT NORTH THIS EVENING AND STORMS WILL GRADUALLY DISSIPATE AROUND SUNSET...ALTHOUGH A FEW STORMS MAY LINGER INTO THIS EVENING ACROSS THE FAR NORTHERN AREAS OF THE CWA. DRIER AIR WILL CONTINUE TO MOVE INTO THE REGION FRIDAY WITH MOST OF THE AREA THUNDERSTORM FREE. THE ONLY AREA OF CONCERN WILL STILL BE PORTIONS OF INYO COUNTY AND CENTRAL NYE COUNTIES...BUT ANY STORMS ARE EXPECTED TO BE MORE ISOLATED. DRIER AND MORE STABLE AIR WILL PUSH IN FOR SATURDAY WITH DRY CONDITIONS ALONG WITH BELOW NORMAL TEMPERATURES AREAWIDE. .LONG TERM...SUNDAY THROUGH THURSDAY. THE LATEST MEDIUM RANGE MODELS CONTINUE TO INDICATE A DRY SOUTHWEST FLOW REMAINING IN PLACE ACROSS SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA MUCH OF NEXT WEEK DUE TO A MEAN TROUGH HOLDING ALONG THE WEST COAST. AN AREA OF HIGH PRESSURE IS FORECAST TO BE CIRCULATING OVER EASTERN NEW MEXICO AND NORTHERN TEXAS THROUGH THE MIDDLE OF NEXT WEEK. THE GFS INDICATES SOUTHERLY FLOW OVER WESTERN ARIZONA MAY BRING SOME MOISTURE UP INTO MOHAVE COUNTY AS EARLY AS SUNDAY THEN THE MOISTURE BOUNDARY REMAINS NEAR MOHAVE COUNTY THROUGH AT LEAST THE MIDDLE OF THE WEEK. A SLIGHT CHANCE OF THUNDERSTORMS WILL REMAIN IN PORTIONS OF OUR NORTHWEST ARIZONA ZONES ACCORDINGLY. OTHERWISE...THIS PATTERN WILL RESULT IN SOUTHWEST BREEZES OF 10 TO 20 MPH EACH AFTERNOON AND TEMPERATURES INCREASING A DEGREE OR TWO SUNDAY AND MONDAY LEADING TO NEAR NORMAL READINGS MUCH OF NEXT WEEK WITH HIGHS OF 103 TO 109 ACROSS THE MOJAVE DESERT AND COLORADO RIVER VALLEY ZONES. && .AVIATION...FOR MCCARRAN...SOUTH WINDS BETWEEN 20-30KTS EXPECTED THROUGH 03Z BEFORE SHIFTING MORE TO THE SOUTHWEST AND DISSIPATING TO AROUND 10KTS. ISOLATED THUNDERSTORMS ARE POSSIBLE THROUGH SUNSET...BUT MOST STORMS ARE LIKELY TO REMAIN WEST OF TOWN. DRY CONDITIONS FRIDAY WITH SOUTH WINDS BETWEEN 10-20KTS FROM ABOUT 17Z TO 00Z. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...THUNDERSTORMS EXPECTED INTO THIS EVENING ACROSS INYO...CENTRAL NYE...LINCOLN AND CLARK COUNTIES. STRONGEST STORMS EXPECTED TO REMAIN IN INYO COUNTY...BUT ANY STORM COULD PRODUCE OUTFLOW WINDS UP TO 40KTS. CONDITIONS WILL IMPROVE THIS EVENING...BUT THUNDERSTORM CHANCES WILL AGAIN BE AROUND FRIDAY OVER MAINLY INYO AND CENTRAL NYE COUNTIES. OUTSIDE OF ANY THUNDERSTORMS SOUTH WINDS UP TO 25KTS INTO THIS EVENING THEN DECREASING TO AROUND 10KTS OVERNIGHT. && .SPOTTER INFORMATION STATEMENT...SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && GORELOW FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE: HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER
The San Joaquin Valley radar (KHNX), 209 km away, was scanning. The volume nearest the first event began at 22:37 UTC.
1 flash flood, 1 wildfire. Local standard time, as filed.
Water and debris flowed over Highway 264 between mile markers 12 and 15.
A wildfire at the Clark County Wetlands Park destroyed a wooden footbridge.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2015Every state in 2015This day in weather historyWarnings in Nevada, July 2015
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: 582400, 582402.