2 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 Jul 24, 3:00 PM MST, 4 hours 30 minutes earlier.
AZZ020>028-CAZ030>033-250545- AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 300 PM SAT JUL 24 2004 SOUTHWEST AND SOUTH-CENTRAL ARIZONA...AND SOUTHEAST CALIFORNIA FORECAST DISCUSSION .SYNOPSIS... HIGH PRESSURE ALOFT WILL REMAIN OVER ARIZONA THIS WEEKEND. MEANWHILE ...LOW PRESSURE SYSTEMS MOVING WEST ACROSS MEXICO AND THE GULF OF CALIFORNIA WILL HELP INCREASE MOISTURE TONIGHT AND SUNDAY. THUS...AN INCREASING CHANCE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS IS EXPECTED FOR THE WEEKEND. THE THREAT FOR THUNDERSTORMS WILL BE CONFINED TO SOUTH-CENTRAL ARIZONA BY THE MIDDLE OF NEXT WEEK...AS A LOW PRESSURE SYSTEM DEVELOPS ALONG THE CALIFORNIA COAST...AND PUSHES THE UPPER HIGH SOUTH TOWARD THE MEXICAN BORDER. AS THE LOW DEVELOPS IT WILL SPREAD DRIER AIR INTO SOUTHEAST CALIFORNIA AND WESTERN ARIZONA AND ELIMINATE THE CHANCES FOR WEATHER IN THAT AREA. && .DISCUSSION... UPPER HI HAS SHIFTED TO THE NWRN PART OF THE STATE...GIVING A MODERATE NELY STEERING FLOW TO MUCH OF THE CWA...ESPECIALLY THE ERN HALF. SKIES CLEARED NICELY TODAY UPSTREAM AND SCT STORMS HAVE DEVELOPED GIVEN THE GOOD HEATING AND AMPLE MOISTURE AVAILABLE...AND THESE STORMS SHOULD BE ABLE TO ADVECT SOUTH INTO THE SOUTHCENTRAL DESERTS TONIGHT. IT MIGHT BE A REAL ACTIVE NIGHT BUT FOR A COUPLE OF FACTORS. ONE...AIRMASS OVER SCNTRL AZ NOT AS WET AND UNSTABLE AS IT WAS FRI...WITH 850MB DEWPOINT DOWN TO AROUND 11C...AND THE CAPE IS LESS THAN 1000 J/KG. SURFACE DEWPOINTS AROUND THE DESERTS ARE DOWN AS WELL AND AT 2 PM WERE RUNNING MOSTLY IN THE MID TO UPPER 50S. ALSO...MOST OF THE FORCING AND DIFLUENCE ALOFT WILL FOCUS OVER SERN AZ TONIGHT...WHERE SUBSTANTIAL CLOUD COVER HAS REALLY INHIBITED CONVECTION THUS FAR THIS AFTERNOON. STILL...CHANCE POPS FOR SOUTHCENTRAL AZ LOOK GOOD FOR TONIGHT AND THEY WILL CONTINUE TO BE IN THE FORECAST. THERE MIGHT BE SOME STRONG GUSTY WINDS AND BLOWING DUST IF THE STORMS ARE ABLE TO HOLD TOGETHER AND MOVE INTO THE VALLEY...WITH THE SOMEWHAT DRIER AIR SEEN IN THE LOWER LEVELS OF THE AMS GIVING A MODIFIED INVERTED VEE CHARACTER TO THE SOUNDING. WESTERN ZONES HAVE A SLIGHT CHANCE...INTO THE ERN PORTION OF THE CA ZONES...AS THE STORMS MAY BE ABLE TO WORK WESTWARD IN THE STEERING FLOW AND MOVE INTO THOSE AREAS LATER TONIGHT. BASIC PATTERN DOES NOT CHANGE FOR SUNDAY...AND EXPECT A REPEAT PERFORMANCE WITH A CHANCE FOR LATE AFTN/EVE STORMS IN THE SOUTH-CENTRAL...AND A SLIGHT CHANCE OUT WEST. DEPENDING ON HOW MUCH CONVECTION DEVELOPS TODAY AND HOW MUCH THE LOWER AMS IS WORKED OVER...WE WILL SEE A BIT MORE OR POSSIBLY LESS ACTION TOMORROW...BUT ONLY TIME WILL TELL ON THAT. MODEL TRENDS CONTINUE TO SHOW THAT TROFFING WILL DEVELOP ALONG THE CA COAST DURING THE MIDDLE PART OF NEXT WEEK...AND BY MONDAY THE STEERING FLOW WILL SHIFT TO A NLY DIRECTION...THEN BECOME NWLY TUESDAY. BY WED WLY TO NWLY STEERING FLOW WILL AFFECT MOST OF THE CWA AND CONFINE THE THREAT FOR AFTN/EVE STORMS TO THE AREA AT AND EAST OF PHOENIX. THUS THERE WILL BE DECREASING POPS AND WEATHER FROM THE WEST BEGINNING MONDAY NIGHT AND CONTINUING THRU THE REST OF NEXT WEEK. LITTLE CHANGE HAS BEEN MADE TO THE FORECAST IN THE EXTENDED ..WITH ONE MINOR CHANGE TO REMOVE ANY CHANCE FOR SHOWERS OR STORMS FROM THE PHOENIX ZONE DURING THE AFTERNOON HOURS. CLIMATOLOGY AND THE FLOW PATTERN MAKE IT VERY UNLIKELY THAT STORMS WILL AFFECT THE PHOENIX METRO AREA BETWEEN NOON AND 5 PM ON THOSE DAYS. .PSR WATCHES/WARNINGS/ADVISORIES... AZ...NONE. CA...NONE. && 11
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 1042 AM MST SAT JUL 24 2004 AZZ022>024-027-028-250500- GREATER PHOENIX AREA-NORTHWEST AND NORTH CENTRAL PINAL COUNTY- NORTHWEST MARICOPA COUNTY-SOUTHERN GILA/TONTO NF FOOTHILLS- SOUTHWEST MARICOPA COUNTY- 1042 AM MST SAT JUL 24 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH-CENTRAL ARIZONA. .DAY ONE...TODAY DAMAGING WIND WILL BE THE MAIN THREAT BETWEEN 5 PM AND 10 PM...MAINLY OVER THE DESERTS. TREES...POWER LINES...AND POORLY CONSTRUCTED BUILDINGS WILL BE MOST AT RISK. BLOWING DUST IS ALSO POSSIBLE IN THE DESERTS AFTER 5 PM...AND VISIBILITIES MAY BE LOWERED TO BELOW ONE MILE IN PLACES. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA OUTLETS FOR POSSIBLE WATCHES OR WARNINGS. SCATTERED THUNDERSTORMS MAY CAUSE HEAVY RAINS AND FLOODING OF POOR DRAINAGE AND LOW LYING AREAS. WASHES MAY BEGIN FLOWING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A CONTINUED CHANCE FOR MAINLY EVENING THUNDERSTORMS SUNDAY THROUGH TUESDAY...AND THESE STORMS MAY PRODUCE BRIEF HEAVY RAIN ALONG WITH STRONG GUSTY WINDS AND BLOWING DUST. THE CHANCE FOR STORMS WILL BE LESS WEDNESDAY THROUGH SATURDAY...AS DRIER AIR MOVES IN FROM THE WEST. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS LIKELY TODAY THROUGH SUNDAY...AND MAY BE NEEDED MONDAY AND TUESDAY. && FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT HTTP://WWW.WRH.NOAA.GOV/PHOENIX (IN SMALL LETTERS) AZZ020-021-025-026-CAZ031-250500- LOWER COLORADO RIVER VALLEY AZ-LOWER COLORADO RIVER VALLEY CA- SOUTHWEST DESERTS-WEST CENTRAL DESERTS- YUMA/MARTINEZ LAKE AND VICINITY- 1042 AM MST SAT JUL 24 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWEST ARIZONA AND THE LOWER COLORADO RIVER VALLEY. .DAY ONE...TODAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A SLIGHT CHANCE FOR EVENING AND EARLY MORNING THUNDERSTORMS SUNDAY THROUGH TUESDAY...WHICH COULD PRODUCE STRONG GUSTY WINDS...SOME BLOWING DUST...AND BRIEF HEAVY RAINFALL. && FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT HTTP://WWW.WRH.NOAA.GOV/PHOENIX (IN SMALL LETTERS) .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED SUNDAY THROUGH TUESDAY. CAZ030-032-033-250500- IMPERIAL COUNTY-JOSHUA TREE NATIONAL PARK- RIVERSIDE COUNTY/EASTERN DESERTS- 1042 AM MST SAT JUL 24 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST CALIFORNIA. .DAY ONE...TODAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. && FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT HTTP://WWW.WRH.NOAA.GOV/PHOENIX (IN SMALL LETTERS)
The Yuma radar (KYUX), 165 km away, was scanning. The volume nearest the first event began at 02:27 UTC.
2 thunderstorm wind. Local standard time, as filed.
Five power poles downed by winds, small hail and torrential rainfall. Power lines fell onto a semi-tractor trailer parked on road shoulder on state highway 72, trapping the driver for over an hour.
Two travel trailers overturned, roof ripped off a mobile home, 6 trees knocked over.
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, July 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: 5412927, 5412928.