An unusually late-season low pressure system combined with unusually early-season deep subtropical moisture to fuel scattered thunderstorms over the Mojave Desert and southern Great Basin. Some storms produced flash flooding, and isolated wind damage also 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.
An unusually late-season low pressure system combined with unusually early-season deep subtropical moisture to fuel scattered thunderstorms over the Mojave Desert and southern Great Basin. Some storms produced flash flooding, and isolated wind damage also 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 Jun 10, 2:07 PM PST, 1 hour 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 307 PM PDT WED JUN 10 2015 .SYNOPSIS...AN AREA OF LOW PRESSURE WILL PRODUCE A CHANCE OF SHOWERS AND THUNDERSTORMS ACROSS MUCH OF THE AREA THROUGH TONIGHT. LINGERING MOISTURE AND WEAK LOW PRESSURE WILL KEEP A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS OVER MAINLY THE HIGHER TERRAIN THURSDAY THROUGH SATURDAY. A DRIER WESTERLY FLOW DEVELOPING SUNDAY WILL LEAD TO NORMAL HOT AND DRY CONDITIONS BY EARLY NEXT WEEK. && .DISCUSSION...TONIGHT THROUGH WEDNESDAY. A MOIST AND UNSTABLE AIR MASS IS OVER THE AREA THIS AFTERNOON WITH SCATTERED THUNDERSTORMS OVER LINCOLN COUNTY AND ISOLATED THUNDERSTORMS ELSEWHERE. THIS ACTIVITY WILL CONTINUE INTO THE EVENING...ESPECIALLY NORTH WHERE THE STRONGEST INFLUENCE OF THE UPPER TROUGH IS ALONG WITH THE SLOWEST STORM MOTION. A FLASH FLOOD WATCH REMAINS IN EFFECT ACROSS INYO...ESMERALDA...CENTRAL NYE AND LINCOLN COUNTIES. THE MAIN UPPER TROUGH WILL MOVE EAST OF THE AREA THURSDAY AND THURSDAY NIGHT BUT WEAK TROUGHINESS AND MOISTURE WILL LINGER OVER THE CWA LEADING TO SHOWER AND THUNDERSTORM CHANCES NORTH AND EAST OF LAS VEGAS. THIS WEAK TROUGH WILL SHIFT A BIT SOUTH FRIDAY WITH A SLIGHT CHANCE OF THUNDERSTORMS OVER MUCH OF THE AREA EXCEPT PERHAPS THE FAR SOUTH AND FAR NORTHWEST PART OF THE CWA. THIS TROUGH WILL MOVE EAST SATURDAY BUT LINGERING MOISTURE AND INSTABILITY COULD LEAD TO ISOLATED SHOWERS/THUNDERSTORMS OVER EASTERN MOHAVE COUNTY AND PERHAPS THE SIERRA. A DRIER WESTERLY FLOW WILL START TO DEVELOP SUNDAY WITH HOT AND DRY CONDITIONS DEVELOPING FOR MONDAY THROUGH WEDNESDAY UNDER A ZONAL FLOW. TEMPERATURES WILL GRADUALLY WARM TO ABOVE NORMAL LEVELS BY THE WEEKEND WITH TEMPERATURES BY TUESDAY AND WEDNESDAY ABOUT 5 DEGREES ABOVE NORMAL. && .AVIATION...FOR MCCARRAN...SOUTH-SOUTHWEST WINDS 10-14 KTS WITH GUSTS AROUND 20 KTS ARE EXPECTED THROUGH ABOUT 04Z THIS EVENING THEN DECREASING TO AROUND 10 KTS WITH GUSTS DROPPING OFF. LIGHT AND VARIABLE WINDS FAVORING AN EASTERLY DIRECTION ARE EXPECTED MUCH OF THURSDAY. ISOLATED THUNDERSTORMS WILL BE AROUND THE AREA THROUGH THIS EVENING WHICH COULD CAUSE SOME VARIABLE GUSTY WINDS FOR A SHORT PERIOD. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...SOUTH WINDS 10-20 KTS WITH GUSTS TO 30 KTS THROUGH THIS EVENING WILL WILL BECOME VARIABLE 5-10 KTS AFTER ABOUT 05Z. WINDS WILL MAINLY FOLLOW TYPICAL DIURNAL TERRAIN DRIVEN PATTERNS THURSDAY. SCATTERED THUNDERSTORMS NORTH OF CLARK COUNTY WILL CONTINUE MUCH OF TONIGHT WITH ISOLATED THUNDERSTORMS FARTHER SOUTH MAINLY THIS EVENING. STRONG GUSTY WINDS AND BRIEF HEAVY RAIN ARE CONCERNS WITH STORMS ESPECIALLY SOUTH. THERE WILL STILL BE A CHANCE OF THUNDERSTORMS THURSDAY NORTH AND EAST OF LAS VEGAS. && .SPOTTER INFORMATION STATEMENT...SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && HARRISON FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE: HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER
The Edwards AFB radar (KEYX), 138 km away, was scanning. The volume nearest the first event began at 23:21 UTC.
3 flash flood. Local standard time, as filed.
Water, mud, and debris flowed over Highway 190. A traffic collision in the flooded area injured two people (indirect).
Rocks and debris were over Highway 190 near Father Crowley Point.
Water, rocks, and debris flowed over Linn Road and Belfield Boulevard. A nearby spotter reported half an inch of rain in less than half an hour.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2015Every state in 2015This day in weather historyWarnings in California, June 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: 578159, 578160, 578161.