Subtropical moisture over the Desert Southwest fueled thunderstorms which brought heavy rain and 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.
Subtropical moisture over the Desert Southwest fueled thunderstorms which brought heavy rain and 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 1, 11:20 AM MST, 1 hour 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 1120 AM PDT WED AUG 1 2007 .SYNOPSIS...MOIST SOUTHEASTERLY FLOW WILL CONTINUE INTO SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA TODAY AND THURSDAY. A DRY SOUTHWEST FLOW IS FORECAST TO DEVELOP GOING INTO THE WEEKEND WHICH WILL PUSH BEGIN TO PUSH THE MONSOON MOISTURE BOUNDARY OUT OF SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA. THEREFORE SCATTERED THUNDERSTORMS CAN BE EXPECTED EACH AFTERNOON AND EVENING THROUGH THURSDAY FOLLOWED BY DECREASING COVERAGE GOING INTO THE WEEKEND. TEMPERATURES WILL BE SLIGHTLY BELOW NORMAL. && .UPDATE...MESOSCALE CONVECTIVE VORTICITY CENTER CURRENTLY LOCATED NEAR HUALAPAI PEAK IN MOHAVE COUNTY. AREA OF SHOWERS AND ISOLATED THUNDERSTORMS OVER WESTERN CLARK AND NORTHEAST SAN BERNARDINO COUNTY MOVING SLOWLY TO THE NORTHWEST AND INTO INYO AND NYE COUNTIES. THIS AREA IS ASSOCIATED WITH THE WESTERN HALF OF THE MCV. RAIN GAGES ON THE SOUTHWEST SIDE OF THE LAS VEGAS VALLEY HAVE RECEIVED ONE HALF TO ONE INCH OF RAIN...WITH THE FOOTHILLS RECEIVING ONE AND ONE HALF TO TWO INCHES OF RAINFALL. THE TROPICANA DETENTION BASIN JUST WEST OF INTERSTATE 15 HAS SEEN A FIFTEEN FOOT RISE IN LEVEL. CONVECTION IS NOW FIRING ON THE EASTERN SIDE OF THE MCV ACROSS THE NORTHERN HALF OF MOHAVE COUNTY. AT THIS POINT I HAVE INCREASED POPS FOR THE REST OF THE DAY ACROSS INYO...NYE AND ESMERALDA COUNTIES AND LOWER HIGH TEMPS FURTHER IN MANY LOCATIONS. .AVIATION...FOR MCCARRAN...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ACROSS SOUTHERN NEVADA THIS MORNING MOVING WEST-NORTHWEST BETWEEN 5 AND 10 MPH. MAIN AREA LOOKS AS IF IT WILL PASS SOUTH OF THE LAS VEGAS VALLEY BUT HAVE AMENDED THE LAS VEGAS AND NORTH LAS VEGAS TAFS TO INCLUDE THUNDERSTORMS THROUGH 18Z. FOR THIS AFTERNOON THE ABOVE MENTIONED WEATHER COULD INHIBIT THE DEVELOPMENT OF STORMS THIS AFTERNOON IN THE LAS VEGAS VALLEY. WILL EVALUATE THE SITUATION FOR THE 18Z PACKAGE. BEST CHANCE FOR STORMS WILL BE ALONG THE BEATTY AND DAGGETT CORRIDORS THIS MORNING WITH STORMS FILLING IN ACROSS THE PEACH SPRINGS AND MORMON MESA CORRIDORS DURING THE AFTERNOON. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED ACROSS THE REST OF THE AREA TODAY AND TONIGHT. ACTIVITY IS EXPECTED TO DISSIPATE AFTER 05Z. CIGS WILL GENERALLY BE BETWEEN 080 AND 12K FT RANGE DUE TO THUNDERSTORM DEBRIS. && .PREV DISCUSSION...THE PATTERN REMAINS LARGELY UNCHANGED FROM 24 HOURS AGO WITH THE EXCEPTION OF A FEW MINOR DISTURBANCES APPARENT ON SATELLITE AND RADAR IMAGERY THIS MORNING. EXTENSIVE CLOUD COVER BLANKETED ALL BUT NORTHERN INYO AND ESMERALDA COUNTIES THIS MORNING. THE AIR MASS REMAINED VERY MOIST OVER SOUTHERN NEVADA/NORTHWEST ARIZONA AND EASTERN SAN BERNARDINO COUNTIES. THE MOST RECENT RUC ANALYSIS SHOWED PRECIPITABLE WATER VALUES BETWEEN 1.5 AND 1.9 INCHES OVER THE AREA...SIMILAR TO 24 HOURS AGO. FAIRLY ORGANIZED THUNDERSTORMS DEVELOPED OVER NORTH CENTRAL ARIZONA AND SOUTH CENTRAL UTAH BETWEEN 07Z AND 09Z APPARENTLY ON THE LEADING EDGE OF AN EMBEDDED CIRCULATION NEAR THE FOUR CORNERS. ANOTHER CIRCULATION WAS APPARENT NEAR SOUTHERN MOHAVE COUNTY AND A THUNDERSTORM ALSO DEVELOPED NEAR DESERT ROCK/MERCURY AND THE NORTHERN END OF THE SPRING MOUNTAINS AROUND 09Z. RECENT 400 MB RUC VORTICITY CHARTS PICK UP THE SOUTHERN MOHAVE COUNTY CIRCULATION AND TAKE IT INTO EASTERN SAN BERNARDINO COUNTY AND UP INTO SOUTHERN NYE COUNTY THIS MORNING. 06Z NAM FORECAST SOUNDINGS ARE FAIRLY UNSTABLE BUT SURFACE HEATING WILL AGAIN BE LIMITED TODAY. SIMILAR TO TUESDAY...THERE IS POTENTIAL FOR HEAVY RAIN PRODUCING THUNDERSTORMS IF A STRONG ENOUGH TRIGGER COULD GET THINGS GOING. SO FAR...NOTHING LOOKS SIGNIFICANT ENOUGH TO TRIGGER EXTENSIVE CONVECTION AND WILL LEAVE THE INHERITED ISOLATED TO SCATTERED THUNDERSTORM COVERAGE LARGELY UNMODIFIED. BOTH THE GFS AND NAM INDICATE DRIER SOUTHWEST FLOW BEGINNING TO PUSH INTO INYO COUNTY AND WESTERN SAN BERNARDINO COUNTY THURSDAY THEN PUSHING FARTHER EAST FRIDAY. ALTHOUGH THE MODELS INDICATE THIS WILL BEGIN TO PUSH THE MONSOON MOISTURE BOUNDARY OUT OF SOUTHERN NEVADA TOWARD THE WEEKEND...DEEP MOISTURE IN PLACE MAY ACTUALLY BE A LITTLE STUBBORN TO LEAVE. ALSO...INCREASING VERTICAL SHEAR PROFILES AS SOUTHWEST FLOW STRENGTHENS ALOFT COULD SUPPORT BETTER ORGANIZED STORMS THURSDAY AND ESPECIALLY FRIDAY OVER SOUTHEAST NEVADA AND NORTHWEST ARIZONA. .LONG TERM...STILL EXPECTING A CHANGE IN THE UPPER AIR PATTERN BY THE END OF THE WEEK AND EARLY PART OF NEXT WEEK. ECMWF/GFS/NAM ALL CONTINUE TO DEPICT A TROUGH ALONG THE WEST COAST BY SATURDAY WITH A SOUTHWESTERLY FLOW AHEAD OF IT. TIMING AND DEPTH OF THE TROUGH IS CRITICAL AS IT WILL DICTATE HOW QUICKLY WE SWITCH OVER TO A LESS FAVORABLE FLOW FOR CONVECTION. COMPARING LATEST RUNS WITH WHAT WAS BEING SHOWN LAST NIGHT DOES INDICATE A DEFINITE DRYING TREND BY EARLY NEXT WEEK. STILL SUSPECT THAT MOHAVE COUNTY WILL HAVE SCATTERED SHOWERS AND THE MOISTURE WILL BE THE MOST STUBBORN TO LEAVE THERE. TEMPERATURES WILL AVERAGE A FEW DEGREE BELOW NORMAL FOR THE PERIOD. WILL NEED TO KEEP AN EYE OUT FOR POTENTIAL FIRE WEATHER CONCERNS AS STRONGER SPEEDS JUST ABOVE THE SURFACE WILL LIKELY CREATE GUSTY CONDITIONS OVER THE NORTHERN HALF OF THE CWA ESPECIALLY BY THE START OF NEXT WEEK. && .VEF WATCHES/WARNINGS/ADVISORIES... .NV...NONE. .AZ...NONE. .CA...NONE. && CZYZYK/PIERCE/ADAIR/BELL HTTP://WEATHER.GOV/LASVEGAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 619 AM PDT WED AUG 1 2007 CAZ519>523-021300- EASTERN SIERRA SLOPES-OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY- DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT- 619 AM PDT WED AUG 1 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CALIFORNIA. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS INYO AND WESTERN SAN BERNARDINO COUNTIES IN CALIFORNIA TODAY. THE LOWER LEVELS OF THE ATMOSPHERE ARE STILL FAIRLY DRY. THE MAIN HAZARDOUS WEATHER CONCERNS WITH THESE THUNDERSTORMS WILL BE STRONG GUSTY WINDS AND SMALL HAIL. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP AGAIN ON THURSDAY ACROSS THE AREA THEN SIGNIFICANTLY DIMINISH IN COVERAGE FRIDAY THROUGH THE WEEKEND AS DRIER SOUTHWEST FLOW DEVELOPS. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS PER STANDARD OPERATING PROCEDURES. AZZ001>003-036-CAZ524>527-NVZ014>022-021300- 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-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- 619 AM PDT WED AUG 1 2007 /619 AM MST WED AUG 1 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST ARIZONA...CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT A DEEP MOIST AIR MASS REMAINS IN PLACE ACROSS SOUTHERN NEVADA... FAR SOUTHEAST CALIFORNIA AND NORTHWEST ARIZONA. ISOLATED THUNDERSTORMS THIS MORNING WILL INCREASE IN COVERAGE AND BECOME SCATTERED THIS AFTERNOON AND EVENING. THE MAIN HAZARDOUS WEATHER ASSOCIATED WITH THE STRONGEST STORMS WILL CONTINUE TO BE THE POTENTIAL FOR ISOLATED HEAVY RAINFALL AND FLASH FLOODING. THUNDERSTORMS MAY ALSO PRODUCE ISOLATED OCCURRENCES OF STRONG GUSTY WINDS AND HAIL. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY MONSOONAL MOISTURE WILL BE SUSTAINED ACROSS THE REGION THROUGH THURSDAY AND PRODUCE SCATTERED THUNDERSTORMS...MAINLY IN THE AFTERNOONS AND EVENINGS. ISOLATED HEAVY RAINFALL AND FLASH FLOODING WILL REMAIN THE MAIN HAZARDOUS WEATHER THREAT WITH THESE THUNDERSTORMS THOUGH STRONG GUSTY WINDS AND HAIL WILL ALSO BE POSSIBLE. DECREASING THUNDERSTORM COVERAGE FROM WEST TO EAST WILL OCCUR FRIDAY THROUGH THE WEEKEND AS A DRY SOUTHWEST FLOW DEVELOPS. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS PER STANDARD PROCEDURES. JGA
The Las Vegas radar (KESX), 80 km away, was scanning. The volume nearest the first event began at 19:58 UTC.
1 flash flood. Local standard time, as filed.
Several roads were closed and/or damaged by flooding, including U.S. Highway 93 20 miles north of Wikieup, Stockton Hills Rd. in the Kingman area, and Antares Rd. and Diamond Bar Rd. north of Kingman.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2007Every state in 2007This day in weather historyWarnings in Arizona, August 2007
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: 55827.