1 thunderstorm wind, as filed by the National Weather Service.
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 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 8, 1:04 PM PST, 4 hours 9 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 204 PM PDT WED SEP 8 2004 .SYNOPSIS...SOME LATE SEASON MONSOONAL MOISTURE HAS MOVED INTO NORTHWEST ARIZONA...EASTERN SAN BERNARDINO COUNTY...AND EXTREME SOUTHERN NEVADA. THE MOISTURE WILL CONTINUE TO SPREAD NORTH AND WEST THROUGH THE END OF THE WEEK...BRINGING THUNDERSTORM CHANCES FURTHER INTO SOUTHERN NEVADA AND CALIFORNIA. TEMPERATURES WILL REMAIN SLIGHTLY ABOVE NORMAL. && .SHORT TERM...THE QUESTION YESTERDAY WAS WHICH MODEL WAS HANDLING THE MOISTURE CORRECTLY. THE ANSWER WAS NONE OF THEM. SURGE CAME UP THE COLORADO RIVER LAST NIGHT AND EARLY THIS MORNING WITH AN ASSISTING PUSH FROM AN OUTFLOW BOUNDARY PRODUCED BY STORMS OVER MEXICO. AS A RESULT...STORMS HAVE FIRED THIS AFTERNOON ON THE MOUNTAINS AROUND KINGMAN AND PEACH SPRINGS. THIS ACTIVITY SHOULD DIE DOWN WITH THE LOSS OF DAYTIME HEATING. TODAYS QUESTION IS HOW MUCH FARTHER NORTH AND WEST THE MOISTURE WILL PUSH. THE MODELS REMAIN INCONSISTENT WITH THIS ISSUE...AND FORECASTER CONFIDENCE ON THE DETAILS IS PRETTY MUCH NIL. SO...CHOSE TO MAINTAIN CONTINUITY FROM THE PREVIOUS FORECAST PACKAGE AND WITH SURROUNDING OFFICES BY KEEPING LOW GRADE POPS IN THE EASTERN CWFA THROUGH SATURDAY WITH A BRIEF WINDOW OF OPPORTUNITY IN THE SIERRAS THURSDAY AFTERNOON AND EVENING. TEMPERATURES WILL BE A BLEND OF ETA/GFS/COOP MOS WITH ADJUSTMENTS FOR KNOWN LOCAL BIASES. && .LONG TERM...EXPECT BY SUNDAY MOST MOISTURE THAT IS LEFT IN CWA TO IN THE NORTH PART AS DEPICTED IN THE GFS. BROAD WESTERLIES WILL AID IN MOVING THE MONSOON MOISTURE NOW IN PLACE. TIMING AND STRENGTH OF TROUGHS PASSING THROUGH THE AREA SHIFT RUN TO RUN. RIGHT NOW EXPECT ONE TO PASS THROUGH THE MONDAY/TUESDAY TIME FRAME. AFTER THAT TIMING IS DIFFICULT FOR HARD TO DEPICT SYSTEMS. IN GENERAL TERMS EXPECT LOWER TEMPERATURES IN THE EXTENDED IN RESPONSE TO BROAD TROUGHING OVER THE AREA. ATTM EXPECT CONDITIONS TO REMAIN DRY AS MOST MOISTURE WILL STAY TO THE NORTH OF THE AREA AS IS USUALLY THE CASE WITH TRANSIT PACIFIC SYSTEMS. && .AVIATION...TAF ADEQUATELY COVERS ALL SIGNIFICANT WEATHER EXPECTED AT KLAS. && .VEF WATCHES/WARNINGS/ADVISORIES... .NV...NONE. .AZ...NONE. .CA...NONE. && MORGAN/JACQUES
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 907 AM PDT WED SEP 8 2004 AZZ001>003-036-CAZ026>029-NVZ014>022-091700- DEATH VALLEY NATIONAL PARK CA-ESMERALDA AND CENTRAL NYE COUNTY NV- LAKE HAVASU AND FORT MOHAVE AZ-LAKE MEAD NATIONAL RECREATION AREA NV- LAKE MEAD NATIONAL RECREATION AREA AZ-LAS VEGAS VALLEY NV- LINCOLN COUNTY NV-NORTHEAST CLARK COUNTY NV-NORTHWEST DESERTS AZ- NORTHWEST PLATEAU AZ- OWENS VALLEY AND ADJACENT EASTERN SIERRA SLOPES CA- SAN BERNADINO COUNTY DESERTS CA-SAN BERNARDINO COUNTY- UPPER COLORADO RIVER VALLEY CA-SHEEP RANGE NV- SOUTHERN CLARK COUNTY NV-SPRING MOUNTAINS-RED ROCK CANYON NV- WESTERN CLARK AND SOUTHERN NYE COUNTY NV- 907 AM PDT WED SEP 8 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST CALIFORNIA...SOUTHERN NEVADA AND NORTHWEST ARIZONA. .DAY ONE... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. MOISTURE SURGED UP THE COLORADO RIVER OVERNIGHT AND THIS MORNING...SO ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON ROUGHLY FROM LAS VEGAS SOUTHWARD. SEVERE WEATHER AND FLASH FLOODING ARE NOT LIKELY. .DAYS TWO THROUGH SEVEN... THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. MOISTURE WILL LINGER OVER THE MOJAVE DESERT AND SOUTHERN GREAT BASIN THROUGH THE REMAINDER OF THE WEEK...LEADING TO ISOLATED TO SCATTERED THUNDERSTORMS. SEVERE WEATHER AND FLASH FLOODING ARE NOT LIKELY. MORGAN
The Las Vegas radar (KESX), 147 km away, was scanning. The volume nearest the first event began at 01:13 UTC.
1 thunderstorm wind. Local standard time, as filed.
Strong winds from a severe thunderstorms pushed through Lake Havasu City. Several trees were blown over, one house received roof damage and a construction trailer was overturned.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2004Every state in 2004This day in weather historyWarnings in Arizona, September 2004
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: 5422346.