Yet another push of monsoon moisture brought another round of thunderstorms to the Mojave Desert and southern Great Basin. A few storms produced flash flooding.
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.
Yet another push of monsoon moisture brought another round of thunderstorms to the Mojave Desert and southern Great Basin. A few storms produced flash flooding.
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 26, 1:42 PM PST, 3 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 242 PM PDT WED AUG 26 2015 .SYNOPSIS...ENOUGH MOISTURE WILL REMAIN ACROSS THE EASTERN PORTIONS OF THE AREA THURSDAY WITH SHOWERS AND THUNDERSTORMS POSSIBLE IN PARTS OF MOHAVE...CLARK...LINCOLN AND EASTERN SAN BERNARDINO COUNTIES. LESS THUNDERSTORM COVERAGE IS EXPECTED FRIDAY FOLLOWED BY SUNNY...DRY AND HOT WEATHER OVER THE WEEKEND. && .SHORT TERM...THROUGH FRIDAY NIGHT... OVER THE NEXT 24 HOURS, FURTHER DRYING IS FORECAST TO TAKE PLACE ACROSS THE WESTERN THIRD OF THE AREA AND DRIER CONDITIONS ARE FORECAST ACROSS THE NORTHERN ZONE AREAS OF ESMERALDA, NYE AND LINCOLN COUNTIES. DESPITE A DRIER WESTERLY FLOW, THE SOUTHEASTERN AREAS OF THE CWA STAY MOIST ALTHOUGH LESS MOIST THAN TODAY. THIS APPEARS TO BE RELATED TO A POOL OF HIGHER PWAT AIR OVER/NEAR THE NORTHERN BAJA COAST THAT THE STEERING FLOW IS ABLE TO TAP AND DIRECT INTO THE SOUTHEAST CWA. PER THE GFS, INCH OR GREATER PWATS THURSDAY AFTERNOON EXTEND, ROUGHLY, EAST OF A LINGE FROM TWENTYNINE PALMS TO MESQUITE. LESS CLOUD COVER IS FORECAST ON THURSDAY AND WEAK TO MODERATE INSTABILITY IN THE DEEPER MOISTURE REGION MENTIONED ABOVE. SOUTHWEST FLOW IS MAINTAINED INTO FRIDAY WITH LESS MOISTURE IMPORT FORECAST. THE SOUTHEAST REGIONS INCLUDING EASTERN SAN BERNARDINO, CLARK AND MOHAVE COUNTIES STILL ARE FORECAST TO HAVE SUFFICIENT MOISTURE FOR AT LEAST A MENTION OF STORMS OVER PRIMARILY MOHAVE COUNTY FRIDAY AFTERNOON. OTHER AREAS WITHIN THIS HIGHER MOISTURE AREA ARE FORECAST TO BE MORE STABLE AND PRECIP CHANCES ARE NOT MENTIONED. AFTER CLOUD COVER LIMITED DAYTIME HEATING FOR MUCH OF THE DAY TODAY, LESS CLOUD COVER AND LESS OVERALL DEPTH OF MOISTURE SHOULD ALLOW TEMPERATURES TO WARM BACK TO NEAR NORMAL THURSDAY AND ABOVE NORMAL FRIDAY. .LONG TERM...SATURDAY THROUGH WEDNESDAY. DEEP TROUGHING ALONG THE WEST COAST WILL KEEP SOUTHWESTERLY FLOW ACROSS THE REGION THIS WEEKEND THROUGH EARLY NEXT WEEK. THIS SHOULD KEEP THE BRUNT OF ANY MONSOON MOISTURE TO THE EAST OF THE FORECAST AREA. SOME VERY LOW GRADE MOISTURE MAY WOBBLE INTO MOHAVE COUNTY FROM TIME TO TIME...BUT DRY CONDITIONS ARE EXPECTED THE MAJORITY OF THE TIME. FOR THE MOMENT I HAVE CONTINUED THE INHERITED DRY FORECAST...BUT HAVE SOME VERY LOW GHOST POPS AT SOME TIMES DURING THE WEEKEND. AFTER REBOUNDING LATE THIS WEEK...TEMPERATURES SHOULD SLOWLY DECREASE THROUGH EARLY NEXT WEEK...RETURNING TO NEAR NORMAL. && .AVIATION...FOR MCCARRAN...GENERALLY LIGHT WINDS FAVORING A SOUTHEAST DIRECTION ARE FAVORED THROUGH THE EARLY EVENING BEFORE TURNING SOUTHWEST. THUNDERSTORM OUTFLOW WILL BE POSSIBLE THROUGH THE EVENING WHICH WOULD FAVOR GUSTY...ERRATIC WINDS. HI-RES MODELS ARE PICKING UP ON A POSSIBLE OUTFLOW BOUNDARY MOVING INTO THE VALLEY FROM THE NORTHEAST BETWEEN 11 PM AND MIDNIGHT. CONFIDENCE IS NOT HIGH AND IT WON'T BE INCLUDED IN THE TAF BUT WILL NEED TO BE MONITORED AND TAF ADJUSTED IF NEEDED. ISOLATED THUNDERSTORMS REMAIN POSSIBLE AND COULD IMPACT PORTIONS OF THE VALLEY THROUGH EARLY EVENING. CLOUDS SCT-BKN AOA 10K THROUGH THE REMAINDER OF THE DAY...BUT COULD LOWER TO AROUND 8K NEAR ANY STORMS. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...A FEW SHOWERS OR THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS NEAR KBIH THROUGH THE AFTERNOON WITH ISOLATED STORMS POSSIBLE EAST OF LINE FROM TWENTYNINE PALMS TO KTPH. CLOUD DECKS GENERALLY AT 10-12K FEET BUT LOWER NEAR SHOWERS/THUNDERSTORMS. WINDS WILL GENERALLY BE 7-10KTS THROUGH THE REMAINDER OF THE DAY EXCEPT IN THE CASE OF OUTFLOW BOUNDARIES. && .SPOTTER INFORMATION STATEMENT...SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && SALMEN/WOLCOTT FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE: HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1211 PM PDT WED AUG 26 2015
...TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
...DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0300 PM DUST STORM 14 NW DOLAN SPRINGS 35.70N 114.48W
08/25/2015 MOHAVE AZ PUBLIC
SEVERAL REPORTS/PHOTOS ON SOCIAL MEDIA OF
DUST STORM NEAR DOLAN SPRINGS AND US 93
BETWEEN CHLORIDE AND WHITE HILLS FROM 3-4 PM
MST.
&&
CMSThe Santa Ana Mts radar (KSOX), 152 km away, was scanning. The volume nearest the first event began at 21:43 UTC.
1 flash flood. Local standard time, as filed.
Baseline Road was closed between Utah Trail and Wilshire Avenue, and another road 4 miles N of Twentynine Palms was also closed. A swift water rescue took place at Highway 62 and Godwin Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2015Every state in 2015This day in weather historyWarnings in California, August 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: 594700.