Another push of monsoon moisture fueled more thunderstorms across the Mojave Desert and southern Great Basin. Several storms produced flash flooding, and there was also isolated severe weather.
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.
Another push of monsoon moisture fueled more thunderstorms across the Mojave Desert and southern Great Basin. Several storms produced flash flooding, and there was also isolated severe weather.
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 29, 2:45 PM PST, 4 hours 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 345 PM PDT FRI JUL 29 2011 .SYNOPSIS...MOISTURE SPREADING FROM NORTHERN MEXICO UP ACROSS THE ENTIRE REGION WILL LEAD TO EXPANDING COVERAGE OF THUNDERSTORMS EACH DAY THROUGH THE WEEKEND. DRIER AIR WILL BEGIN TO PUSH INTO CALIFORNIA MONDAY AND WORK EAST BY MID-WEEK...LIMITING THUNDERSTORMS TO MAINLY MOHAVE COUNTY BY WEDNESDAY. && .SHORT TERM...TONIGHT THROUGH MONDAY NIGHT...THUNDERSTORMS CONTINUED TO EXPAND ACROSS THE REGION THIS AFTERNOON AND THIS LOOKS TO BE THE BEGINNING OF AN ACTIVE PERIOD THROUGH MONDAY. THE SOUTHEAST TO SOUTHERLY FLOW ALREADY IN PLACE WILL CONTINUE TO PULL UP MOISTURE FROM NORTHERN MEXICO. WIDESPREAD PRECIPITABLE WATER VALUES OF 1.5 INCHES OR MORE ARE EXPECTED TO BE IN PLACE ACROSS MOST OF THE REGION BY SATURDAY MORNING. THUS...HEAVY RAIN WILL BE POSSIBLE WITH ANY STORMS AND LIGHT STEERING FLOW WILL KEEP STORMS SLOW MOVING. ALTHOUGH THERE WILL LIKELY BE SOME UPPER LEVEL DISTURBANCES MOVING UP ACROSS THE REGION AT SOME POINT...THERE IS NOTHING READILY APPARENT THE NEXT 24 HOURS TO LATCH ONTO WHICH WOULD ACT AS A FOCUSING MECHANISM ASIDE FROM OROGRAPHICS. SINCE THE SOUTHERN SIERRA WILL BE THE MOST OBVIOUS AREA FOR NUMEROUS THUNDERSTORMS...A FLASH FLOOD WATCH WAS ISSUED SATURDAY AND SUNDAY. THE EASTERLY WAVE OVER WEST TEXAS AND SOUTHERN NEW MEXICO IS FORECAST TO SLOWLY LIFT UP THROUGH EASTERN ARIZONA AND WESTERN NEW MEXICO...SO IT SHOULD HAVE LITTLE EFFECT ON OUR FORECAST AREA. THE NAM DOES INDICATE A WEAK INVERTED TROUGH MOVING UP ACROSS THE REGION SUNDAY AND CONVECTION IS FORECAST TO EXPAND ACCORDINGLY. OTHERWISE...WILL HAVE TO TAKE IT DAY-BY-DAY AND WATCH BOUNDARY INTERACTIONS AND OTHER POTENTIAL FOCUSING POINTS FOR CONVECTION. .LONG TERM...TUESDAY THROUGH FRIDAY...AN UPPER TROUGH WILL CONTINUE TO MOVE TOWARDS THE PAC NW ON TUESDAY. THE MODELS ESSENTIALLY SPLIT ONE PIECE OF THIS TROUGH OFF AND EJECT IN NORTHEAST TOWARDS THE NORTHERN ROCKIES ON WEDNESDAY INTO THURSDAY BUT STILL MANAGE TO LEAVE THE MAIN TROUGH AXIS BEHIND ALONG THE WEST COAST WHICH LOOKS TO SIT THERE THROUGH NEXT WEEKEND. THIS WILL RESULT IN A SOUTHWEST FLOW ALOFT ACROSS OUR AREA FROM LATE TUESDAY MORNING INTO NEXT WEEKEND. DRIER AIR WILL GRADUALLY SPREAD EASTWARD WITH TIME. TUESDAY LOOKS TO REMAIN MOIST AND UNSTABLE FROM THE SPRING MOUNTAINS OF SOUTHERN NEVADA EASTWARD AND THUS WE KEPT IN SLIGHT CHANCE TO CHANCE POPS OVER THESE AREAS WITH GHOST POPS AND SOME HIGHER ELEVATION SLIGHT CHANCE POPS IN AREAS TO THE WEST. BY WEDNESDAY A CONTINUED EASTWARD MOVEMENT OF DRIER AND STABLE AIR IS EXPECTED AND POPS WERE CONFINED TO AREAS OF MOHAVE COUNTY AWAY FROM THE COLORADO RIVER AND FAR EASTERN LINCOLN COUNTY. FOR THURSDAY AND FRIDAY WHILE SOME MID-LEVEL MOISTURE REMAINS OVER MOHAVE COUNTY...FORECASTED LIFTED INDEX VALUES OFF THE GFS WERE POSITIVE AND THUS I REMOVED THE MENTION OF THUNDERSTORMS FROM THE FORECAST THERE AND KEPT THEM OUT OVER THE REMAINDER OF THE FORECAST AREA. BY NEXT WEEKEND...THE FLOW ALOFT MAY START TURN MORE SOUTHERLY ALLOWING FOR ADDITIONAL MOISTURE TO RETURN TO THE AREA. TEMPS WERE GENERALLY KEPT ON A SLOW UPWARD TREND THROUGH THIS PERIOD...WITH READINGS AT OR A LITTLE BELOW NORMAL ON TUESDAY AND WEDNESDAY...THEN ABOVE NORMAL BEYOND THAT AS DRIER AIR SPREADS IN AND SUNSHINE SHOULD BECOME MORE ABUNDANT. && .AVIATION...FOR MCCARRAN...THE MAIN ISSUE THIS EVENING WILL BE THE POTENTIAL FOR TSRA AND TSRA OUTFLOW BOUNDARIES AT THE AIRPORT COMPLEX. WHILE IT SHOULD STAY DRY AT THE AIRPORT...WINDS FROM THUNDERSTORM ACTIVITY AROUND THE AIRPORT COULD CAUSE WINDS TO BECOME GUSTY AND ERRATIC FROM WHAT THE TAF SHOWS. OTHERWISE WINDS SHOULD TREND TOWARDS TYPICAL DIURNAL DIRECTIONAL TRENDS THROUGH SATURDAY EVENING. TSRA WILL BE POSSIBLE AGAIN IN AROUND THE LAS VEGAS VALLEY ON SATURDAY...ESPECIALLY IN THE AFTERNOON AND EVENING. GUSTY AND ERRATIC WINDS AS WELL AS REDUCED VSBY AND CIGS WILL BE POSSIBLE IN AND NEAR TSRA. OVERALL SCT-BKN CLOUDS THROUGH SATURDAY EVENING AOA 14K FEET...WITH BASES AS LOW AS 8K-12K FEET AT TIMES. ALL OF THE APPROACH CORRIDORS COULD SEE TSRA THIS EVENING AND AGAIN ON SATURDAY ESPECIALLY IN THE AFTERNOON AND EVENING. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...THE MAIN ISSUE THIS EVENING AND AGAIN SATURDAY ESPECIALLY IN THE AFTERNOON AND EVENING WILL BE SCT SHRA AND TSRA ACROSS THE AREA WITH THE HIGHEST CHANCES FOR ACTIVITY OVER THE HIGHER ELEVATIONS. GUSTY AND ERRATIC WINDS AND REDUCED CIGS AND VSBY WILL BE POSSIBLE IN AND NEAR ANY TSRA. OTHERWISE WINDS WILL FAVOR TYPICAL DIURNAL DIRECTIONAL TRENDS THROUGH SATURDAY EVENING. MAINLY SCT-BKN CLOUDS AOA 12K-16K FEET WITH BASES AS LOW AS 8K-12K FEET AT TIMES. && .VEF WATCHES/WARNINGS/ADVISORIES... NV...NONE. AZ...NONE. CA...NONE. && ADAIR/STACHELSKI HTTP://WEATHER.GOV/LASVEGAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 504 AM PDT FRI JUL 29 2011 AZZ001>003-036-CAZ519>527-NVZ014>022-301000- 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- 504 AM PDT FRI JUL 29 2011 /504 AM MST FRI JUL 29 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST ARIZONA...CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT ISOLATED SHOWERS AND THUNDERSTORMS WILL OCCUR AS MONSOON MOISTURE INCREASES FROM THE SOUTHEAST. THE THREAT FOR HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE THREAT OF HAZARDOUS WEATHER INCREASES SATURDAY THROUGH MONDAY AS THERE IS A HIGHER PROBABILITY OF SHOWERS AND THUNDERSTORMS. THERE WILL BE A GREATER THREAT OF FLASH FLOODING FROM HEAVY RAINFALL. STORMS WILL ALSO PRODUCE GUSTY WINDS WHICH COULD CATCH SOME BOATERS OFF GUARD ON AREA LAKES AS WELL AS DANGEROUS LIGHTNING. THE HIGHER HUMIDITY VALUES WILL LEAD TO A FEELING OF GREATER DISCOMFORT. DRIER AIR MOVING INTO CALIFORNIA EARLY IN THE WEEK WILL EVENTUALLY LIMIT ANY THUNDERSTORMS TO MOHAVE COUNTY BY THE MIDDLE OF NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HOWEVER... SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
312 PM PDT FRI JUL 29 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0258 PM HAIL 2 W ASPENDELL 37.23N 118.61W
07/29/2011 E0.25 INCH INYO CA TRAINED SPOTTER
PEA SIZE HAIL WAS REPORTED AT THE LAKE SABRINA BOAT
LANDING.
&&
STACHELSKIThe San Joaquin Valley radar (KHNX), 236 km away, was scanning. The volume nearest the first event began at 02:59 UTC.
1 lightning, 1 flash flood. Local standard time, as filed.
Lightning struck and set fire to a power pole along a dirt road near Silver Peak.
Rocks, mud, and a lot of water were on Highway 266 near Lida.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2011Every state in 2011This day in weather historyWarnings in Nevada, July 2011
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: 322860, 322864.