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 Phoenix, AZ wrote its last area forecast discussion before the first event at Sep 19, 3:15 AM MST, 2 hours 15 minutes earlier.
AZZ020>028-CAZ030>033-191745- AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 315 AM MST SUN SEP 19 2004 SOUTHWEST AND SOUTH-CENTRAL ARIZONA...AND SOUTHEAST CALIFORNIA FORECAST DISCUSSION .SYNOPSIS... AN EARLY SEASON COLD LOW PRESSURE SYSTEM WILL CONTINUE TO SLOWLY DEVELOP OVER THE WESTERN STATES...AND PULL A SIGNIFICANT AMOUNT OF SUBTROPICAL MOISTURE FROM TROPICAL DEPRESSION JAVIER INTO MAINLY SOUTHWEST AND SOUTH CENTRAL ARIZONA TODAY. THIS WILL LEAD TO A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS WITH THE POTENTIAL FOR LOCALLY HEAVY RAIN OVER SOUTH CENTRAL ARIZONA. A COLD FRONT WILL FINALLY SWEEP THROUGH THE REGION MONDAY FOR A RETURN TO DRY WEATHER TUESDAY THROUGH SATURDAY. && .DISCUSSION... A STRONG UPPER TROF CONTINUES TO DIG OVER CA WHICH IS AND WILL CONTINUE TO DRAW UP MOISTURE FROM NOW TROPICAL DEPRESSION JAVIER LOCATED NEAR CENTRAL BAJA. SATELLITE PHOTOS SHOWED A TONGUE OF 1.5 INCHES PWATER FROM JAVIER INTO SE CA SW AZ AT THIS TIME ALONG WITH A WELL DEFINED ZONE OF CONVERGENCE PLUS THE APPROACHING TROF WHICH HELPED DEVELOP STRONG TSTORMS OVER THAT AREA LATE SAT NIGHT/EARLY SUN MORNING. THIS HAS RESULTED IN A SEVERE THUNDERSTORM WATCH BOX FOR SW AZ FOR VERY EARLY SUN MORNING. AIRMASS OVER SW AND SOUTH CENTRAL AZ HAS BECOME VERY MOIST PAST 24 HOURS AS SURFACE DEW POINTS ARE IN THE 60S AND LAST NIGHTS PHX SOUNDING SHOWED JUST ABOUT SATURATED ABOVE 750 MB WITH PWATER UP TO 1.8 INCHES. AIRMASS TO CONTINUE TO REMAIN MOIST AS MOISTURE BEING SHED FROM JAVIER WILL CONTINUE TO BE DRAWN INTO AZ SUN. A 300 MB JET IS ALSO ROTATING AROUND THE TROF AND SOUTH CENTRAL AZ WILL BE UNDER ITS RIGHT REAR QUAD EARLY TODAY...WITH THE JET SLOWLY LIFTING TO THE NE DURING THE DAY TODAY. THIS WILL PROVIDE JET DYNAMICS TO THE MOIST AIRMASS. MODELS ALSO SHOW GOOD MID LEVEL OMEGA VALUES OVER SOUTH CENTRAL AZ EARLY THIS MORNING INTO THE FIRST PART OF THE DAY...THEN SLOWLY DECREASES THIS AFTERNOON AS THIS DYNAMICS SHIFTS OFF TOWARD THE EAST. THIS REASONABLE AS AFTER A BRIEF LULL LATE SAT EVENING... STORMS BEGAN TO REDEVELOP ESPECIALLY OVER SOUTH CENTRAL AZ BY MIDNIGHT INTO EARLY SUN MORNING. ALL THIS WILL COMBINE INTO A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS OVER SOUTH CENTRAL AZ TODAY WITH SOME PRODUCING LOCALLY HEAVY RAINS. RAINFALLS OF 1 TO 2 INCHES ARE STILL POSSIBLE. THUS THE FLASH FLOOD WATCH FOR SOUTH CENTRAL AZ WILL CONTINUE TODAY. THERE WILL BE A DECREASING CHANCE OF THESE STORMS OVER SW AZ TODAY...WITH POSSIBLY JUST A FEW LINGERING SHOWERS OVER SE CA EARLY TODAY AS DRIER AIR AND DOWNWARD MOTION SWINGS AROUND THE TROF WILL BEGIN TO PUSH INTO SE CA TODAY. THIS DRIER AIR AND DOWNWARD MOTION WILL SLOWLY PUSH EAST ON MON INTO SW AZ... LEAVING LINGERING SHOWERS/TSTORMS OVER SOUTH CENTRAL AZ. BY TUES THE TROF WILL BE MOVING THRU AZ WITH DRY W FLOW AND DOWNWARD MOTION OVER THE ENTIRE REGION FOR MOSTLY SUNNY SKIES. TROF WILL LIFT OUT TO THE EAST BY WED LEAVING DRY W FLOW ALOFT OVER OUR ENTIRE REGION FOR MOSTLY CLEAR SKIES FOR THE REST OF THE WEEK. SOME RE-BUILDING OF THE RIDGE WILL TAKE PLACE LATER IN THE WEEK WHICH WILL BRING SOME WARMING. TIGHT PRESSURE OF THE TROF WILL CONTINUE TO BRING SOME BREEZINESS TO MUCH OF OUR REGION THROUGH MON WITH LESSER WIND BY MID WEEK AS THE TROF LIFTS OUT. && .PSR WATCHES/WARNINGS/ADVISORIES... AZ...FLASH FLOOD WATCH SOUTH CENTRAL ZONES 22...23...24...27...28 TODAY. CA...NONE. && DKS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 1050 AM MST SAT SEP 18 2004 AZZ020-021-025-026-CAZ031>033-190400- IMPERIAL COUNTY-LOWER COLORADO RIVER VALLEY AZ- LOWER COLORADO RIVER VALLEY CA-RIVERSIDE COUNTY/EASTERN DESERTS- SOUTHWEST DESERTS-WEST CENTRAL DESERTS- YUMA/MARTINEZ LAKE AND VICINITY- 1050 AM MST SAT SEP 18 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR FAR EASTERN RIVERSIDE AND FAR EASTERN IMPERIAL COUNTIES IN CALIFORNIA...AND YUMA AND LA PAZ COUNTIES IN ARIZONA. .DAY ONE...TODAY THE COMBINATION OF A COLD FRONT MOVING THROUGH THE WESTERN STATES...AND THE ENTRAINMENT OF SUBTROPICAL MOISTURE FROM HURRICANE JAVIER...WILL RESULT IN AN INCREASING CHANCE FOR LARGE FAST MOVING THUNDERSTORMS WITH HEAVY RAIN AND STRONG WINDS. THE THUNDERSTORM THREAT WILL CONTINUE INTO THE EVENING HOURS. THE MOST VULNERABLE AREAS ARE EASTERN RIVERSIDE AND EASTERN IMPERIAL COUNTIES TOWARD THE COLORADO RIVER...AND ALL OF YUMA AND LA PAZ COUNTIES IN ARIZONA. HURRICANE MOISTURE MOVING AHEAD OF A STRONG COLD FRONT IS AN UNUSUAL WEATHER EVENT...AND THOSE CONCERNED SHOULD CONTINUE TO MONITOR WEATHER FORECASTS IN CASE WEATHER WATCHES...WARNINGS...OR ADVISORIES ARE NEEDED TODAY. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA OUTLETS FOR UPDATES. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AZZ022>024-027-028-190400- GREATER PHOENIX AREA-NORTHWEST AND NORTH CENTRAL PINAL COUNTY- NORTHWEST MARICOPA COUNTY-SOUTHERN GILA/TONTO NF FOOTHILLS- SOUTHWEST MARICOPA COUNTY- 1050 AM MST SAT SEP 18 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL ARIZONA. .DAY ONE...TODAY THE COMBINATION OF A COLD FRONT MOVING THROUGH THE WESTERN STATES...AND THE ENTRAINMENT OF SUBTROPICAL MOISTURE FROM HURRICANE JAVIER...WILL RESULT IN AN INCREASING CHANCE FOR SHOWERS AND STRONG THUNDERSTORMS TODAY. THERE IS A THREAT FOR HEAVY RAIN AND STRONG THUNDERSTORM WINDS WHICH WILL LAST INTO THE EVENING HOURS. THE ENTRAINMENT OF TROPICAL MOISTURE AHEAD OF A STRONG COLD FRONT IS AN UNUSUAL WEATHER EVENT...AND THOSE CONCERNED SHOULD CONTINUE TO MONITOR WEATHER FORECASTS IN CASE WEATHER WATCHES... WARNINGS...OR ADVISORIES ARE NEEDED. HEAVY RAINS MAY CAUSE MINOR FLOODING OF POOR DRAINAGE AND LOW LYING AREAS. WASHES MAY BEGIN FLOWING. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA OUTLETS FOR UPDATES. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN WILL CONTINUE ON SUNDAY AS THE COLD FRONT APPROACHES ARIZONA. HEAVY RAINS MAY CAUSE MINOR FLOODING OF POOR DRAINAGE AND LOW LYING AREAS. WASHES MAY BEGIN FLOWING
The Yuma radar (KYUX), 137 km away, was scanning. The volume nearest the first event began at 12:28 UTC.
1 thunderstorm wind. Local standard time, as filed.
Winds knocked down 3 power poles resulting in a 12 hour power outage for Quartzsite residents.
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: 5422847.