Monsoon moisture triggered thunderstorms which brought isolated flooding to the Mojave Desert and southern Great Basin.
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.
Monsoon moisture triggered thunderstorms which brought isolated flooding to the Mojave Desert and southern Great Basin.
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 26, 8:46 AM PST, 2 hours 14 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 946 AM PDT SAT JUL 26 2008 ...CORRECTED FOR GRAMMAR IN SYNOPSIS... .SYNOPSIS...SCATTERED SHOWERS AND THUNDERSTORMS WILL AFFECT AREAS FROM THE LAS VEGAS VALLEY SOUTH TODAY AS A WEAK UPPER DISTURBANCE INTERACTS WITH MOIST UNSTABLE AIR. THUNDERSTORMS WILL BE CONFINED TO MOHAVE COUNTY ARIZONA BY MONDAY AS DRY WESTERLY FLOW REDUCES AVAILABLE MOISTURE. TEMPERATURES WILL BE NEAR SEASONAL NORMS THROUGH EARLY NEXT WEEK. && .UPDATE...THUNDERSTORMS IN PROGRESS ALREADY THIS MORNING SO NOT MUCH TIME FOR DISCUSSION. STORMS FORMED OVERNIGHT IN THE LOW LEVEL MOIST AXIS EXTENDING UP THE COLORADO RIVER VALLEY SUPPORTED BY LIFT FROM MESOSCALE VORTEX OVER LAKE MEAD. MORNING UA ANALYSIS SHOWS COL AREA AND DEFORMATION AXIS SPLITTING FORECAST AREA WITH NORTHWEST HALF UNDER DRY SW FLOW ALOFT. SE HALF REMAINS MOIST AND UNSTABLE WITH SEVERAL CIRCULATIONS COMPETING TO DOMINATE STEERING FLOW. REMNANTS OF GENEVIEVE OFFSHORE EXPECTED TO LIFT OUT ACROSS AREA NEXT TWO DAYS. THIS WILL EVENTUALLY BRING DRYING TO ENTIRE FORECAST AREA BUT DURING THE TRANSITION COULD HELP TO SUPPORT DEEP CONVECTION TONIGHT INTO SUNDAY. REMNANTS OF DOLLY PROGGED TO SHEAR OUT BEFORE HAVING ANY SIGNIFICANT IMPACT ON OUR AREA. ONGOING CONVECTION IS LEAVING LOTS OF OUTFLOW BOUNDARIES TO INTERACT AND GENERATE NEW UPDRAFTS. INTEGRATED PW OF 1.0-1.5 INCHES FROM I-15 SOUTH COMBINED WITH LIGHT MEAN WINDS WILL MAKE FLASH FLOODING THE PRIMARY THREAT. -RUNK- .AVIATION...FOR MCCARRAN...BASED ON THE LATEST RADAR TRENDS...WILL KEEP A VCNTY TSTM IN THE TAF FOR THE REMAINDER OF THE MORNING. AT THE TERMINALS THIS MORNING...EXPECT THAT WE WILL BE DEALING MORE WITH JUST SOME SHRA-...WHILE TSTMS SHOULD GENERALLY STAY SOUTH AND EAST OF THE LAS VEGAS VALLEY. EXTENT OF CLOUD COVER AROUND THIS MORNING CAUSES CONCERN FOR JUST HOW MUCH SHOWER OR TSTM ACTIVITY WILL BE AROUND THIS AFTERNOON. WHILE SOME DRIER AIR ALOFT IS NOTED TO OUR SOUTH...LOWER LEVEL MOISTURE AND ENOUGH INSTABILITY COULD STILL RESULT IN ADDITIONAL CHANCES FOR A TSTM TO BE AROUND LATER THIS AFTERNOON AND EVENING SO WILL ADD IN A VCTY TSTM FOR THEN. TSTMS WILL ALSO OCCUR THROUGH THIS EVENING IN THE APPROACH CORRIDORS...WITH THE BEST ODDS IN THE PEACH SPRINGS AND MORMON MESA CORRIDORS. SCT-BKN CLOUDS AT/ABOVE 12K FEET TONIGHT. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...TWO DIFFERENT STORIES ACROSS THE AREA TODAY. ACROSS MOHAVE...CLARK...PARTS OF SAN BERNARDINO COUNTY AND EXTREME SOUTHEASTERN LINCOLN COUNTY...SHOWERS AND TSTMS WILL BE AROUND THROUGH THIS EVENING. MAIN CONCERNS WILL BE HEAVY DOWNPOURS FROM STORMS AND LOCALLY GUSTY WINDS AS WELL AS LOCAL REDUCTIONS IN VSBY AND CIGS TO MVFR OR IFR LEVELS. SCT-BKN CLOUDS IN THESE AREAS AT/ABOVE 12K FEET FOR TONIGHT. FURTHER NORTH AND WEST...DRIER AIR IN PLACE WILL ALLOW FOR A MAINLY CLEAR SKY TODAY INTO TONIGHT. GUSTY WINDS OF 15-20 KTS THIS AFTERNOON AND EVENING IN THE OWENS VALLEY AND AROUND KDRA. -STACHELSKI- && .PREV DISCUSSION...FROM 325 AM PDT...UPPER LEVEL DISTURBANCE THAT WAS OVER THE NORTHERN GULF OF CALIFORNIA LAST NIGHT HAS HELD TOGETHER NICELY...MORE THEN MODELS SUGGESTED 24 HOURS AGO. FEATURE CLEARLY EVIDENT IN WATER VAPOR IMAGERY MOVING NORTH ACROSS NORTHWEST ARIZONA. FEATURE IS RESPONSIBLE FOR NOCTURNAL SHOWERS WHICH ON RADAR ENCOMPASS PARTS OF EASTERN CLARK AND NORTHERN MOHAVE COUNTIES. DID HAVE AN ISOLATED THUNDERSTORM NEAR TEMPLE BAR AND ALSO HAVE BEEN GETTING SOME LIGHTNING STRIKES SOUTH OF INTERSTATE 40 BETWEEN NEEDLES AND ESSEX IN EASTERN SAN BERNARDINO COUNTY. USING THE GFS SOLUTION THIS MORNING AS IT WAS HANDLING THE UPPER LEVEL DISTURBANCE AND ASSOCIATED AREA OF FORCING BETTER. GFS SLOWLY SHIFTS THE WEAK DISTURBANCE NORTH AND EAST ACROSS NORTHERN ARIZONA TODAY. WE WILL HAVE AROUND 6 MORE HOURS OF FORCING FROM DISTURBANCE THEN LATE MORNING AND AFTERNOON CONVECTION WILL BE DRIVEN BY SURFACE HEATING. FOR TODAY...DID NOT DIFFERENTIATE ON TIMING OF SHOWERS OR THUNDERSTORMS IN ZONES NEAR OR CURRENTLY EXPERIENCING WEATHER. NOT IMPRESSED WITH MONSOON PUSH AS MODELS SHOWING H8 DEWPOINT CREEPING ONLY AS HIGH AS 10-12 DEG CELSIUS ACROSS ERN SAN BERNARDINO AND SOUTHERN MOHAVE COUNTIES THIS AFTERNOON. ONLY MAKES SENSE THAT THOSE AREA WILL EXPERIENCE BETTER COVERAGE OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING WITH BRIEF HEAVY RAIN THE CONCERN. AS FOR SUNDAY AND MONDAY...MODELS HAVE BEEN CONSISTENT DEVELOPING HIGH PRESSURE CENTER TO OUR SOUTH WITH DRIER WESTERLY FLOW SPREADING IN FROM THE WEST. CONFIDENCE GROWING IN THIS SCENARIO SO DID START TO TRIM BACK POPS IN SOUTHEAST CALIFORNIA SUNDAY AND REMOVED ALL MENTION OF THUNDERSTORMS ON MONDAY EXCEPT IN NORTHWEST ARIZONA. TEMPERATURES WILL BE CLOSE TO SEASONAL NORMALS. -PIERCE- .LONG TERM...TUESDAY TO FRIDAY...A TROUGH IS EXPECTED TO PASS THROUGH THE PACNW TUESDAY AND TO FLATTEN THE RIDGE OVER THE SOUTHERN CONUS. MODEL DIFFERENCES AFTER THIS MAKE THE FORECAST LESS CERTAIN. KEPT IN THE CHANCE POPS TUESDAY AND WEDNESDAY AS DO NOT SEE STRONG ENOUGH WEST FLOW WITH THE TROUGH TO SCOUR OUT THE MOISTURE. THE GFS BRINGS A TROUGH INTO THE PACNW AGAIN THURSDAY AND FRIDAY AND WITH IT A POTENTIALLY DRYING SOUTHWEST FLOW WHILE ECMWF HAS LITTLE TROUGHING THERE AND HAS A BROAD RIDGE OVER THE SOUTHWESTERN 2/3S OF THE CONUS. HAVE LEANED MORE TOWARDS THE GFS SOLUTION WHICH LEADS TO DRYER FAR EXTENDED. HAVE REMOVED NIGHT TIME THUNDERSTORMS FOR THURSDAY AND FRIDAY. OTHERWISE JUST MADE MINOR CHANGES IN THE OTHER PARAMETERS. && -JACQUES- .VEF WATCHES/WARNINGS/ADVISORIES... NV...NONE. AZ...NONE. CA...NONE. && HTTP://WEATHER.GOV/LASVEGAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 525 AM PDT SAT JUL 26 2008 AZZ001>003-036-CAZ523>527-NVZ015>022-270700- NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-WESTERN MOJAVE DESERT- EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN- SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY-LINCOLN COUNTY- NORTHEAST CLARK COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY- SHEEP RANGE-SPRING MOUNTAINS-LAS VEGAS VALLEY- SOUTHERN CLARK COUNTY- 525 AM PDT SAT JUL 26 2008 /525 AM MST SAT JUL 26 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST ARIZONA...CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS WILL OCCUR MAINLY SOUTH AND EAST OF INTERSTATE 15 TODAY. BRIEF HEAVY RAIN AND LOCALIZED FLOODING WILL BE THE MAIN IMPACT FROM THE STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A DRIER WESTERLY FLOW WILL START TO DEVELOP ACROSS THE REGION ON SUNDAY AND PUSH MONSOON MOISTURE BACK INTO ARIZONA AS EARLY AS THE MIDDLE OF NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
729 AM PDT SAT JUL 26 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM FLOOD ECHO BAY 36.32N 114.41W
07/26/2008 CLARK NV PARK/FOREST SRVC
THE PARK SERVICE REPORTED THAT WASHES WERE RUNNING FULL
AT ECHO BAY AND THE BOAT LAUNCH RAMP AREA WAS FLOODED.
&&
STACHELSKIPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
924 AM PDT SAT JUL 26 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 PM LIGHTNING 3 N LAKE HAVASU CITY 34.49N 114.33W
07/25/2008 MOHAVE AZ UNKNOWN
SEWER PLANT TRANSFORMER WAS HIT BY LIGHTNING. PARTS OF
THE PLANT ARE NOT OPERATIONAL. TIME WAS ESTIMATED BY
RADAR AND LIGHTNING OBSERVATIONS AND CALLED IN BY SPOTTER
AZ-69.
&&
ELPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
1138 AM PDT SAT JUL 26 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1030 AM HAIL 2 N HUALAPAI PEAK 35.10N 113.90W
07/26/2008 E0.25 INCH MOHAVE AZ PARK/FOREST SRVC
1125 AM FLASH FLOOD HUALAPAI PEAK 35.07N 113.90W
07/26/2008 MOHAVE AZ PARK/FOREST SRVC
A PARK OFFICIAL RELAYED REPORTS FROM THE PUBLIC THAT
HUALAPAI MOUNTAIN ROAD WAS FLOODED BY WATER RUNNING
ACROSS IT FROM WASHES AND SEVERAL BOULDERS WERE ON THE
ROAD AROUND MILE MARKER 11.
&&
STACHELSKIThe Las Vegas radar (KESX), 58 km away, was scanning. The volume nearest the first event began at 18:58 UTC.
1 flash flood. Local standard time, as filed.
Morning Star Mine Road was flooded for approximately four miles.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2008Every state in 2008This day in weather historyWarnings in California, 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: 114915.