A strong low pressure system brought thunderstorms and heavy rain to the Mojave Desert.
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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.
A strong low pressure system brought thunderstorms and heavy rain to the Mojave Desert.
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 Sep 22, 5:00 AM MST, 1 hour 30 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE LAS VEGAS NV 500 AM PDT SAT SEP 22 2007 .SYNOPSIS...AN UNSEASONABLY STRONG AREA OF LOW PRESSURE WILL FINALLY MOVE INLAND ACROSS CALIFORNIA AND SOUTHERN NEVADA TODAY AND TONIGHT. THIS SYSTEM WILL PRODUCE SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS TODAY WITH ACTIVITY DECREASING TONIGHT. A WEAK DISTURBANCE WILL BRUSH ACROSS NORTHERN NEVADA SUNDAY WITH A SLIGHT CHANCE OF SHOWERS ACROSS HIGHER ELEVATIONS OF THE SOUTHERN GREAT BASIN. TEMPERATURES WILL BE 10 TO 15 DEGREES BELOW NORMAL THROUGH THE WEEKEND BUT WILL GRADUALLY WARM TO NEAR NORMAL LEVELS BY LATER NEXT WEEK. && .UPDATE...PERSISTENT BAND OF SHOWERS AND THUNDERSTORMS HAS FINALLY MOVED EAST OF DEATH VALLEY. ALLOWED FLASH FLOOD WATCH TO EXPIRE AS SCHEDULED. && .PREV DISCUSSION...300 AM PDT SAT SEP 22...SHORT TERM...UPPER LOW JUST OFF THE COAST AND THE PERSISTENT BAND OF SHOWERS ACROSS OUR AREA LOOK LIKE THEY ARE FINALLY STARTING TO MOVE NORTHEAST EARLY THIS MORNING. EXPECT NUMEROUS SHOWERS ACROSS NORTHERN AND EASTERN PORTIONS OF THE FORECAST AREA TODAY WITH SCATTERED SHOWERS OVER THE SOUTHWEST. NOT SURE ABOUT SNOWFALL AMOUNTS IN THE SIERRA THIS MORNING BUT SOME RAIN REPORTED IN BISHOP OVERNIGHT AND WITH UPSLOPE FLOW...EXPECT THERE HAS BEEN SOME SNOW AT HIGHER ELEVATIONS. SNOWFALL SHOULD CONTINUE OR INCREASE AS THE LOW MOVES A LITTLE FARTHER EAST. QUESTION MARK ABOUT SNOW IN THE SIERRA THIS AFTERNOON. UPSLOPE FLOW DIMINISHES BUT THERE SHOULD BE SOME CONVECTION AS THE UPPER LOW MOVES OVERHEAD. NAM NOT SHOWING MUCH PRECIPITATION THIS AFTERNOON BUT THE GFS DOES. WILL NOT CHANGE THE WARNING AT THIS TIME BUT DAY SHIFT MAY NEED TO CONSIDER EXTENDING THE HEAVY SNOW WARNING INTO THIS AFTERNOON. PRECIPITATION CHANCES WILL DECREASE FROM THE SOUTHWEST TONIGHT AS THE WEAKENING LOW MOVES INTO NEVADA. MOST OF THE AREA WILL BE DRY SUNDAY HOWEVER A SECONDARY WEAK SHORTWAVE TROUGH WILL MOVE ACROSS NORTHERN NEVADA GIVING THE HIGHER ELEVATIONS OF THE FAR NORTHERN PART OF THE FORECAST AREA A SLIGHT CHANCE OF SHOWERS. DRY NORTHWEST FLOW EXPECTED ON MONDAY. TEMPERATURES WILL BE SOME 10 TO 15 DEGREES BELOW NORMAL TODAY BUT WILL WARM UP AROUND 5 DEGREES BY MONDAY. .LONG TERM...LITTLE IF ANY DIFFERENCE IN THINKING FROM PREVIOUS PACKAGE. DRY MAINLY ZONAL FLOW IN THE EXTENDED WITH A COUPLE OF WEAK SHORTWAVES MOVING OUT OF SOUTHWESTERN CANADA AND THROUGH THE AREA. THE FIRST IS FORECAST THROUGH WEDNESDAY AND THE SECOND EARLY IN THE WEEKEND. MINIMAL MOISTURE IS FORECAST WITH EITHER FEATURE AND WOULD LIKELY BE TIED TO ANY FRONT THAT MOVED THROUGH THE AREA. WENT WITH A DRY FORECAST FOR THIS PACKAGE WITH TEMPERATURES SLOWLY REBOUNDING TO NORMAL LEVELS LATE IN THE WEEK. && .AVIATION...FOR MCCARRAN...SHOWERS AND ISOLATED THUNDERSTORMS WILL CONTINUE FOR THE NEXT SEVERAL HOURS AS MOISTURE CONTINUES TO MOVE IN FROM THE SOUTH. WINDS HAVE BEEN LIGHT AND SHOULD STAY UNDER 8 KNOTS AND VARIABLE BUT COULD BRIEFLY KICK UP AROUND THUNDERSTORMS. CIGS WILL OCCASIONALLY LOWER BELOW 5K FEET AND VISIBILITY COULD BE REDUCED AS SHOWERS MOVE THROUGH THE TERMINAL. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...RAIN BAND OVER EASTERN SAN BERNARDINO AND INYO COUNTY HAS GRADUALLY SHIFTED EAST OVERNIGHT AND WILL FOCUS MORE ON CLARK... LINCOLN AND MOHAVE COUNTIES. SOME AREAS COULD SEE CIGS DROPPING BELOW 3K FEET AT TIMES. WINDS ARE EXPECTED TO REMAIN UNDER 12KTS OVER MOST LOCATIONS THROUGH MID MORNING. .VEF WATCHES/WARNINGS/ADVISORIES... NV...NONE. AZ...NONE. CA...HEAVY SNOW WARNING UNTIL 11 AM PDT TODAY FOR CAZ519-521. && HARRISON/SALMEN HTTP://WEATHER.GOV/LASVEGAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 449 AM PDT SAT SEP 22 2007 AZZ001>003-036-CAZ519>527-NVZ014>022-230600- NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-EASTERN SIERRA SLOPES- OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY- DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT- 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- 449 AM PDT SAT SEP 22 2007 /449 AM MST SAT SEP 22 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST ARIZONA...CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT AN UNSEASONABLY STRONG LOW PRESSURE SYSTEM WHICH HAS BEEN JUST OFF THE SOUTHERN CALIFORNIA COAST WILL MOVE INLAND TODAY AND INTO NEVADA TONIGHT. THIS WILL BRING SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS TO THE AREA TODAY WITH HEAVY SNOW LIKELY IN THE SIERRA THIS MORNING. A HEAVY SNOW WARNING IS IN EFFECT UNTIL 11 AM THERE. SIGNIFICANT RAINFALL IS POSSIBLE ACROSS NORTHWEST ARIZONA AND EASTERN PORTIONS OF SOUTHERN NEVADA TODAY. PRECIPITATION CHANCES WILL DECREASE FROM THE SOUTHWEST TONIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED WITH THIS STORM.
The Las Vegas radar (KESX), 86 km away, was scanning. The volume nearest the first event began at 13:27 UTC.
1 flash flood. Local standard time, as filed.
Diamond Bar Rd. was closed and washes were flooded in Meadview.
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, September 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: 55848.