Another push of monsoon moisture fueled more thunderstorms over the Mojave Desert and southern Great Basin. Significant flash flooding and isolated severe weather occurred.
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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 over the Mojave Desert and southern Great Basin. Significant flash flooding and isolated severe weather occurred.
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 5, 10:23 AM MST, 2 hours 37 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 1023 AM PDT SUN JUL 5 2015 .SYNOPSIS....MOIST AND UNSTABLE AIR WILL ALLOW FOR ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP ACROSS THE AREA TODAY AND AGAIN MONDAY MAINLY IN THE AFTERNOON. DRIER AIR WILL WORK INTO THE AREA ON TUESDAY WHICH WILL DECREASE COVERAGE OF SHOWERS. TEMPERATURES WILL REMAIN SLIGHTLY BELOW NORMAL THROUGH THE WEEK. && .SHORT TERM [MESOSCALE ANALYSIS]...PRIMARY CONCERN THIS MORNING IS A NEGATIVELY TILTED SHORT WAVE MOVING AROUND UPPER LOW OFF THE COAST. THIS FEATURE IS CLEARLY EVIDENT IN WATER VAPOR IMAGERY. TIMING IS VERY GOOD FOR THIS FEATURE AS IT WILL MOVE ACROSS THE WESTERN PORTIONSOF OUR FORECAST AREA THIS AFTERNOON PROVIDING ADDITIONAL LIFT FOR ANY THUNDERSTORM DEVELOPMENT. MOST OF THE WESTERN AND SOUTHERN PORTIONS OF OUR AREA ARE CLOUD FREE AND SHOULD DESTABILIZE QUITE WELL. SPC MESOANALYSIS AND OBSERVATIONS INDICATING LOW LEVEL MOISTURE AND MID- LEVEL INSTABILTY SHOULD BE ENOUGH TO SUPPORT DEVELOPMENT PROVIDED IS CAN BUST THROUGH THE CIN. HIGHER TERRAIN LOCATIONS ARE LIKELY TO GET STARTED FIRST. WITH THE STEERING FLOW FROM THE SOUTH, WE WILL NEED TO KEEP AN EYE DOWN NEAR THE ESSEX CALIFORNIA AREA. STORMS FROM THAT AREA TEND TO WORK NORTH IN THIS FLOW REGIME AND OFTEN AFFECT THE LAS VEGAS VALLEY. ELSEWHERE, MOST CONVECTION ALLOWING MODELS ARE SHOWING ISOLATED TO SCATTERED ACTIVITY IN ALMOST ALL AREAS OF THE CWA THIS AFTERNOON. && .AVIATION...FOR MCCARRAN...ISOLATED SHRA/TSRA ARE POSSIBLE TODAY MAINLY AFTER 20Z. IF THUNDERSTORMS MAKE IT INTO THE LAS VEGAS VALLEY, THEY WILL MOVE IN FROM THE SOUTH. STORMS COULD RESULT IN LOWER CIGS OR GUSTY AND ERRATIC WINDS. OUTSIDE THUNDERSTORM INFLUENCE, WINDS WILL FOLLOW THE TYPICALLY DAILY PATTERN TURNING SOUTH-SOUTHEAST LATE AFTERNOON AND BACK TO SOUTHWEST IN THE EVENING. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...SHRA/TSRA ARE LIKELY TO DEVELOP AFTER 18Z MAINLY ACROSS THE HIGHER TERRAIN OF INYO, ESMERALDA, LINCOLN, CENTRAL NYE, AS WELL AS NORTHERN AND EASTERN MOHAVE COUNTIES AND IN THE SPRING MTS AND SHEEP RANGE. GUSTY AND ERRATIC WINDS AND VSBY/CIGS REDUCED TO MVFR OR LOWER ALONG WITH POSSIBLE MOUNTAIN OBSCURATIONS. && .SPOTTER INFORMATION STATEMENT...SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && LERICOS FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE: HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER
The Las Vegas radar (KESX), 116 km away, was scanning. The volume nearest the first event began at 19:59 UTC.
4 flash flood. Local standard time, as filed.
Six inches of water flowed over the I-40 frontage road near mile marker 66. The Cedar Hills gage nearby measured 2.20 inches of rain.
Boriana Mine Road was washed out at McKenzie Wash.
Antares Road was closed due to flooding.
Temple Bar Road was washed out and impassable.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2015Every state in 2015This day in weather historyWarnings in Arizona, July 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: 582365, 582367, 582368, 582370.