Isolated early morning thunderstorms rumbled over Henderson. One lightning strike caused damage.
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.
Isolated early morning thunderstorms rumbled over Henderson. One lightning strike caused damage.
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 1, 1:52 AM PST, 18 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 252 AM PDT AUG 1 2012 .SYNOPSIS...MOIST AND UNSTABLE AIR COMBINED WITH AN UPPER LEVEL DISTURBANCE WILL KEEP SHOWERS AND THUNDERSTORMS AROUND AT TIMES THROUGH THE WEEKEND ACROSS MOST OF THE AREA. A HIGH MOISTURE CONTENT IN THE ATMOSPHERE WILL MAKE FLASH FLOODING THE PRIMARY THREAT WITH STRONGER THUNDERSTORMS HOWEVER GUSTY WINDS AND HAIL ARE ALSO POSSIBLE. && .SHORT TERM...THE AIR MASS IS VERY MOIST OVER THE FORECAST AREA AND THE PESKY UPPER LOW OVER EASTERN SAN BERNARDINO COUNTY CONTINUES TO GENERATE SHOWERS AND THUNDERSTORMS EVEN IN AREAS THAT SAW PLENTY OF ACTIVITY TUESDAY. WITH THAT BEING THE CASE...I DECIDED TO ISSUE ANOTHER FLASH FLOOD WATCH TODAY AND THIS EVENING FOR CLARK...MOHAVE AND EASTERN SAN BERNARDINO COUNTIES WHERE THE LOW WILL HAVE THE GREATEST INFLUENCE AND THE VERY HIGH PRECIPITABLE WATER VALUES REMAIN IN PLACE. WHILE THE DEEPEST MOISTURE WILL REMAIN IN THE SOUTHEAST PART OF THE CWA...DEWPOINTS HAVE SHOT UP PRETTY HIGH ALL THE WAY TO BISHOP SO JUST ABOUT ALL ZONES WILL SEE AT LEAST A SLIGHT CHANCE OF THUNDERSTORMS TODAY. HIGH PRESSURE WILL SPREAD EAST ACROSS CENTRAL CALIFORNIA INTO NEVADA THURSDAY WITH THE UPPER LOW WEAKENING AND GETTING PUSHED SOUTH A BIT. THIS SHOULD SHUT DOWN PRECIPITATION CHANCES IN THE NORTHWEST HALF OF THE AREA BUT MONSOON MOISTURE AND INSTABILITY WILL LINGER IN THE SOUTHEAST LEADING TO A CHANCE OF THUNDERSTORMS. THE MODELS THEN LIFT THE HIGH TO THE NORTHEAST A BIT ON FRIDAY ALLOWING MOISTURE AND A CHANCE OF THUNDERSTORMS TO RETURN BACK UP TO THE NORTHWEST INTO ALL BUT ESMERALDA COUNTY. PRECIPITABLE WATER VALUES ARE FORECAST TO BE NOT QUITE SO ABNORMALLY HIGH THURSDAY AND FRIDAY SO THE THREAT OF FLASH FLOODING SHOULD BE REDUCED. TEMPERATURES WILL REMAIN BELOW NORMAL IN THE SOUTHEAST WHERE THE DEEPEST MOISTURE IS...ESPECIALLY TODAY. .LONG TERM...LITTLE CHANGES MADE TO THE EXTENDED FORECAST DUE TO ONGOING WEATHER. MODELS CONTINUE TO SHOW SOME MOISTURE REMAINING OVER THE AREA THROUGH THE WEEKEND ALONG WITH INSTABILITY OVER MAINLY THE EASTERN THIRD OF THE CWA. WEAK LOW OFF THE CALIFORNIA COAST MAY HELP BRING IN SOME DRIER AND MORE STABLE AIR TO THE WESTERN PORTIONS OF THE CWA...BUT THE FLOW MAY NOT BE STRONG ENOUGH TO FULLY FLUSH THE MOISTURE UNTIL MIDWEEK. KEPT A GENERAL SLIGHT CHANCE TO CHANCE POP OVER MUCH OF THE AREA THROUGH MONDAY AND THEN DRYING ON TUESDAY AND WEDNESDAY AS THE SOUTHWEST FLOW BECOMES A LITTLE STRONGER. TEMPERATURES ARE FORECAST TO BE CLOSE TO NORMAL...BUT RISING A FEW DEGREES DURING THE WEEK AS THE DRIER AIR WORKS IN. && .AVIATION...FOR MCCARRAN...A BAND OF LIGHT TO MODERATE RAIN SHOWERS AND EMBEDDED THUNDERSTORMS TO IMPACT THE TERMINAL THROUGH SUNRISE. CIGS EXPECTED TO BE AROUND 8-10K FEET. SHOWERS EXPECTED TO DIMINISH AFTER SUNRISE...BUT WILL REMAIN OVER PORTIONS OF SOUTHERN NEVADA. THERE WILL BE ADDITIONAL THUNDERSTORMS AGAIN THIS AFTERNOON WITH THE BEST CHANCES BETWEEN 19Z-23Z. THUNDERSTORMS WILL ALSO LIKELY AFFECT ALL APPROACH CORRIDORS. SOUTHWEST TO WEST WINDS 8-10KTS THIS MORNING WITH WINDS GOING EAST 7-9KTS THIS AFTERNOON. THUNDERSTORM OUTFLOWS MAY MAKE WINDS VARIABLE AT TIMES. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...SCT SHRA/TSRA ARE EXPECTED AGAIN TODAY. COVERAGE SHOULD INCREASE BETWEEN 15Z AND 19Z WITH THE GREATEST COVERAGE IN MOHAVE...EASTERN SAN BERNARDINO...CLARK AND LINCOLN COUNTIES. REDUCED CIGS AND VSBY ARE POSSIBLE NEAR ANY HEAVIER SHRA/TSRA...OTHERWISE BKN-OVC CIGS AOA 8K-12K FEET. WINDS AWAY FROM SHRA AND TSRA WILL FAVOR DIURNAL DIRECTIONAL TRENDS THROUGH TODAY. DRY AT KBIH WITH FEW-SCT CLOUDS AOA 15K FEET AT TIMES. && .VEF WATCHES/WARNINGS/ADVISORIES... NV...FLASH FLOOD WATCH THROUGH THIS EVENING FOR NVZ016>022. AZ...FLASH FLOOD WATCH THROUGH THIS EVENING FOR AZZ001>003-036. CA...FLASH FLOOD WATCH THROUGH THIS EVENING FOR CAZ524>527. && HARRISON/ADAIR HTTP://WEATHER.GOV/LASVEGAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 334 AM PDT TUE JUL 31 2012 AZZ001>003-036-CAZ524>527-NVZ016-020>022-010700- NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-EASTERN MOJAVE DESERT- MORONGO BASIN-CADIZ BASIN-SAN BERNARDINO COUNTY- UPPER COLORADO RIVER VALLEY-NORTHEAST CLARK COUNTY- LAS VEGAS VALLEY-SOUTHERN CLARK COUNTY- 334 AM PDT TUE JUL 31 2012 /334 AM MST TUE JUL 31 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST ARIZONA...CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT A VERY MOIST AND UNSTABLE AIR MASS WILL COMBINE WITH AN AREA OF LOW PRESSURE TO PRODUCE SCATTERED TO NUMEROUS THUNDERSTORMS. HEAVY RAIN IS A GOOD POSSIBILITY WITH STORMS AND A FLASH FLOOD WATCH IS IN EFFECT FROM 8 AM UNTIL 10 PM. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY MONSOON MOISTURE WILL LINGER THROUGH THIS WEEKEND INTO EARLY NEXT WEEK LEADING TO A CHANCE OF MAINLY AFTERNOON AND EVENING THUNDERSTORMS EACH DAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY. SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. CAZ519>523-NVZ014-015-017>019-010700- EASTERN SIERRA SLOPES-OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY- DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT- ESMERALDA AND CENTRAL NYE COUNTY-LINCOLN COUNTY- WESTERN CLARK AND SOUTHERN NYE COUNTY-SHEEP RANGE- SPRING MOUNTAINS- 334 AM PDT TUE JUL 31 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT THERE WILL BE A CHANCE OF THUNDERSTORMS OVER MUCH OF THE AREA TODAY THROUGH THIS EVENING. HOWEVER...ESMERALDA AND NORTHERN NYE COUNTIES ARE EXPECTED TO REMAIN DRY. LOCALLY HEAVY RAIN IS POSSIBLE WITH ANY STORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY EXCEPT FOR NORTHERN INYO AND ESMERALDA COUNTIES...MONSOON MOISTURE WILL LINGER RESULTING IN A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS EACH DAY. .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...SUMMARY
NATIONAL WEATHER SERVICE LAS VEGAS NV
238 AM PDT WED AUG 01 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM HEAVY RAIN 2 NNE CENTENNIAL HILLS 36.31N 115.26W
07/31/2012 M0.76 INCH CLARK NV BROADCAST MEDIA
3 INCHES OF WATER FLOWING DOWN GRAND TEATON DRIVE AT
BUFFALO DRIVE. ROADWAY IS STILL PASSABLE.
0745 AM FLASH FLOOD 3 N SUMMERLIN 36.25N 115.32W
07/31/2012 CLARK NV NWS EMPLOYEE
A LARGE AMOUNT OF MUD AND SMALL ROCKS WASHED ONTO THE 215
BELTWAY AT LONE MOUNTAIN ROAD.
0925 AM FLASH FLOOD 20 E TWENTYNINE PALMS 34.14N 115.72W
07/31/2012 SAN BERNARDINO CA LAW ENFORCEMENT
CALIFORNIA HIGHWAY PATROL REPORTS FIVE OR MORE VEHICLES
STUCK IN WASH 20 MILES EAST OF TWENTYNINE PALMS ON STATE
ROUTE 62.
0945 AM FLASH FLOOD 4 ESE WEST WIND AERO 34.12N 115.85W
07/31/2012 SAN BERNARDINO CA TRAINED SPOTTER
TRAINED SPOTTER IN WONDER VALLEY CA REPORTED 6+ INCHES OF
WATER MOVING ACROSS GAEDKE LANE IN WONDER VALLEY. SPOTTER
ALSO MEASURED 0.33 INCHES FELL IN 10 MINUTES.
1128 AM FLASH FLOOD 10 WSW VIDAL JUNCTION 34.13N 114.74W
07/31/2012 SAN BERNARDINO CA LAW ENFORCEMENT
CALIFORNIA HIGHWAY PATROL REPORTS ROADWAY FLOODING ON
STATE ROUTE 62 AND HIGHWAY 95 BETWEEN MILE MARKERS 104
AND 110. STATE ROUTE 62 HAS BEEN CLOSED WEST OF VIDAL
JUNCTION.
0115 PM FLASH FLOOD 20 S KELSO 34.76N 115.65W
07/31/2012 SAN BERNARDINO CA LAW ENFORCEMENT
CALIFORNIA HIGHWAY PATROL REPORTS PARTS OF KELBAKER ROAD
NEAR I-40 ARE COVERED WITH MUD AND ROCKS.
0152 PM FLASH FLOOD 2 NNW BULLHEAD CITY 35.17N 114.57W
07/31/2012 MOHAVE AZ LAW ENFORCEMENT
BULLHEAD CITY POLICE DEPARTMENT REPORTED THE
LAUGHLIN-BULLHEAD CITY BRIDGE ROAD FLOODED. NUMEROUS
ROADS IN BULLHEAD CITY WERE FLOODED WITH SEVERAL INCHES
OF WATER AND COVERED WITH ROCKS AND MUD.
0242 PM FLASH FLOOD 9 NW NEEDLES 34.91N 114.73W
07/31/2012 SAN BERNARDINO CA LAW ENFORCEMENT
CALIFORNIA HIGHWAY PATROL REPORTS FLOODING ACROSS ROADWAY
APPROXIMATELY 5 MILES NORTH OF I-40 ON US 95.
0250 PM FLASH FLOOD 1 NW BULLHEAD CITY 35.16N 114.57W
07/31/2012 CLARK NV LAW ENFORCEMENT
CASINO RIVER DRIVE IN LAUGHLIN WAS FLOODED WITH AT LEAST
6 INCHES OF WATER.
0307 PM FLASH FLOOD SSW OATMAN 35.03N 114.39W
07/31/2012 MOHAVE AZ TRAINED SPOTTER
A SPOTTER REPORTED BOULDERS IN THE ROAD ALONG HIGHWAY 66.
PORTIONS OF THE ROAD FROM BULLHEAD CITY TO OATMAM HAS
BEEN WASHED OUT. IN ADDITION THE SPOTTER RECEIVED 1.80
INCHES OF RAIN IN ABOUT 1 HOUR.
0420 PM FLASH FLOOD 1 WNW BULLHEAD CITY 35.16N 114.58W
07/31/2012 CLARK NV FIRE DEPT/RESCUE
LAUGHLIN FIRE DEPARTMENT REPORTED WATER WASHED DEBRIS
ONTO THE ROAD AT THE INTERSECTION OF BRUCE WOODBURY DRIVE
AND THOMAS EDISON DRIVE.
0510 PM FLASH FLOOD 5 ESE HENDERSON 36.00N 114.93W
07/31/2012 CLARK NV BROADCAST MEDIA
LAS VEGAS BROADCAST MEDIA REPORTED AT LEAST 6 INCHES OF
MUDDY FLOWING WATER AT THE INTERSECTION WAGON WHEEL AND
BOULDER HIGHWAY.
0839 PM FLASH FLOOD 3 E TWENTYNINE PALMS (A 34.17N 115.74W
07/31/2012 SAN BERNARDINO CA LAW ENFORCEMENT
CHP REPORTS AMBOY RD CLOSED AT SHEEPHOLE VW DUE TO FLASH
FLOODING. MORE THAN ONE VEHICLE IS STUCK IN THE WATER.
1123 PM FLASH FLOOD 11 ENE PANAMINT SPRINGS 36.38N 117.28W
07/31/2012 INYO CA LAW ENFORCEMENT
THE CALIFORNIA HIGHWAY PATROL REPORTED THAT A 75 FOOT
LONG SECTION OF STATE ROUTE 190 WAS COVERED WITH 2 FEET
OF MUD NEAR TOWNES PASS IN DEATH VALLEY NATIONAL PARK.
1125 PM TSTM WND DMG TRONA 35.77N 117.37W
07/31/2012 SAN BERNARDINO CA TRAINED SPOTTER
THUNDERSTORM WINDS CAUSED 2000 CUSTOMERS TO LOSE POWER IN
THE TOWN OF TRONA.
1140 PM FLASH FLOOD 1 N TRONA 35.77N 117.37W
07/31/2012 SAN BERNARDINO CA TRAINED SPOTTER
ESTIMATED 8 TO 12 INCHES OF WATER FLOWING ACROSS TRONA
ROAD.
&&
VEF STAFFThe Las Vegas radar (KESX), 42 km away, was scanning. The volume nearest the first event began at 10:11 UTC.
1 lightning. Local standard time, as filed.
A lightning strike knocked out power to 1000 customers, and started a fire which destroyed a vacant office building at Eastern and Wigwam.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2012Every state in 2012This day in weather historyWarnings in Nevada, August 2012
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: 395536.