1 dust storm, 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 Jul 25, 3:27 PM MST, 2 hours 33 minutes earlier.
AZZ020>028-CAZ030>033-260545- AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 325 PM SUN JUL 25 2004 SOUTHWEST AND SOUTH-CENTRAL ARIZONA...AND SOUTHEAST CALIFORNIA FORECAST DISCUSSION .SYNOPSIS... MOISTURE WILL CONTINUE AROUND THE DESERT SOUTHWEST FOR A COUPLE MORE DAYS GIVING A THREAT FOR ADDITIONAL AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. HOWEVER...THE FLOW ALOFT WILL TURN MORE WEST OR NORTHWEST BY MIDWEEK...WHICH WILL RESULT IN A DRYING TREND AND A TEMPORARY LULL IN THE MONSOON. BY THE WEEKEND...THE UPPER HIGH WILL DEVELOP OVER THE SOUTHERN GREAT PLAINS...HELPING TO BRING A RETURN OF MOISTURE AND THE THREAT OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ACROSS SOUTH-CENTRAL ARIZONA. DAYTIME TEMPERATURES WILL REMAIN SEASONABLY WARM DURING THIS NEW WEEK. && .DISCUSSION... HAVE NOT GIVEN UP HOPE THAT WE MAY STILL BE IN FOR AN ACTIVE EVENING AROUND THE CWA...AS FACTORS MENTIONED IN THE MORNING DISCUSSSION STILL IN PLAY. HOWEVER...ONE LARGE NEGATIVE FACTOR FOR WIDESPREAD DESERT STORMS THIS EVENING IS THAT THE AFTERNOON DEWPOINTS HAVE DROPPED INTO THE MID 50S. ADD TO THIS THAT THERE ARE REALLY NO UPPER IMPULSES TO ACT AS TRIGGERS...WE WILL HAVE TO TOTALLY RELY ON COLLIDING OUTFLOW BOUNDARIES TO GET DESERT REDEVELOPMENT THIS EVENING...AND THESE BOUNDARIES MAY BE FEW AND TOO FAR BETWEEN. CONVECTION THAT HAS FORMED ALONG THE RIM AND TO OUR SE HAVE THUS FAR WEAKENED AS THEY HAVE PROPOGATED TOWARDS THE DRIER ENVIRONS OF THE LOWER DESERTS. HOWEVER...IT IS STILL RELATIVELY EARLY TO GET TOO PESSIMISTIC ABOUT THE THUNDERSTORM POTENTIAL THIS EVENING. DECIDED TO LEAVE POPS AT THE 40 PERCENT THAT WAS INHERITED FROM MIDNIGHT SHIFT FOR THE SCNTRL DESERTS...DROPPING TO 10S AND 20S IN THE FAR WRN CWA. FOR TOMORROW...STEERING FLOW REMAINS OUT OF THE NE...SO IF WE GET LITTLE ACTIVITY TONIGHT TO STABLIZE THE AMS...MONDAY EVENING COULD BE QUITE ACTIVE. PROGS ARE STILL POINTING TOWARDS A STRONG DRYING TREND BY MIDWEEK...WHICH SHOULD LAST 3 OR 4 DAYS. THIS BEING CAUSED BY ANOMALOUSLY STRONG WLYS ONCE AGAIN DROPPING DOWN TO OUR LATITUDE. BY THE WEEKEND...UPPER HIGH REBUILDS TO OUR E...WHICH SHOULD ALLOW A MORE MOIST SELY FLOW TO RETURN TO THE ERN CWA. WILL CONTINUE THE SLIGHT UPSWING IN ACTIVITY BY SATURDAY AND SUNDAY FOR BASICALLY MARICOPA COUNTY EWD. AFTERNOON TEMPS SHOULD NOT VARY TOO MUCH DAY-TO-DAY...WITH THE EXCEPTION OF EITHER TOMORROW OR TUESDAY WHEN ANY CONVECTIVE DEBRIS WOULD CUT DOWN ON INSOLATION. NIGHTTIME LOWS WILL PROBABLY TAKE A SLIGHT DIP LATER THIS WEEK WITH LOWER DEWPOINTS. .PSR WATCHES/WARNINGS/ADVISORIES... AZ...NONE. CA...NONE. && ESTLE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PHOENIX AZ 1001 AM MST SUN JUL 25 2004 AZZ021>024-026>028-260700- GREATER PHOENIX AREA-NORTHWEST AND NORTH CENTRAL PINAL COUNTY- NORTHWEST MARICOPA COUNTY-SOUTHERN GILA/TONTO NF FOOTHILLS- SOUTHWEST DESERTS-SOUTHWEST MARICOPA COUNTY-WEST CENTRAL DESERTS- 1001 AM MST SUN JUL 25 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH-CENTRAL AND PARTS OF SOUTHWEST ARIZONA. .DAY ONE...TODAY SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EVENING...WITH DAMAGING WIND THE MAIN THREAT. TREES...POWER LINES...AND POORLY CONSTRUCTED BUILDINGS WILL BE MOST AT RISK. THERE WILL ALSO BE A THREAT OF DENSE BLOWING DUST WITH REDUCED VISIBILITIES IN THE DESERTS UNDER A MILE AT TIMES. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA OUTLETS FOR POSSIBLE WATCHES OR WARNINGS. THUNDERSTORMS WILL ALSO BE ACCOMPANIED BY HEAVY RAINS. THIS MAY CAUSE MINOR FLOODING OF POOR DRAINAGE AND LOW LYING AREAS...AS WELL AS URBAN STREET INTERSECTIONS. WASHES MAY ALSO BEGIN FLOWING. DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE WILL BE A CONTINUED CHANCE OF SHOWERS AND THUNDERSTORMS ONCE AGAIN MONDAY AFTERNOON AND EVENING...AND AGAIN TUESDAY AFTERNOON AND EVENING. THE STRONGEST STORMS COULD ALSO PRODUCE STRONG...GUSTY WINDS AND HEAVY RAIN. SOME SIGNIFICANT DRYING IS EXPECTED WEDNESDAY...THURSDAY AND FRIDAY WITH NO HAZARDOUS WEATHER EXPECTED. THERE WILL BE A SLIGHT CHANCE OF THUNDERSTORMS AGAIN ON SATURDAY. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS LIKELY THIS EVENING. AZZ020-025-CAZ031>033-260700- IMPERIAL COUNTY-LOWER COLORADO RIVER VALLEY AZ- LOWER COLORADO RIVER VALLEY CA-RIVERSIDE COUNTY/EASTERN DESERTS- YUMA/MARTINEZ LAKE AND VICINITY- 1001 AM MST SUN JUL 25 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST ARIZONA AND MOST OF SOUTHEAST CALIFORNIA. .DAY ONE...TODAY THERE WILL BE A CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ACROSS THE AREA. THE MAIN THREAT THAT THESE STORMS WILL POSE WILL BE HEAVY RAINS...WHICH MAY CAUSE MINOR FLOODING OF POOR DRAINAGE AND LOW LYING AREAS. WASHES MAY BEGIN FLOWING. THERE COULD ALSO BE SOME DENSE BLOWING DUST...WHICH COULD REDUCE VISIBILITIES AT TIMES TO UNDER A MILE. DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE WILL BE A SLIGHT CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS AGAIN ON MONDAY...WITH HEAVY RAIN THE MAIN THREAT. A DRYING TREND IS BEING FORECAST TUESDAY THROUGH SATURDAY WITH LITTLE IF ANY THREAT OF HAZARDOUS WEATHER EXPECTED. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING. CAZ030-260700- JOSHUA TREE NATIONAL PARK- 1001 AM MST SUN JUL 25 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR JOSHUA TREE NATIONAL PARK. .DAY ONE...TODAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The national radar mosaic for the moment the first event began.
1 dust storm, 1 thunderstorm wind. Local standard time, as filed.
Widespread dense blowing dust spread across a large area of Pinal County between Apache Junction and Casa Grande. Several vehicles involved in accidents along route 347 just south of I-10. Wind speeds were generally 40 to 50 mph and at times the visibility was less than 50 feet. One automatic weather station just northwest of Florence recorded a peak wind of 53 mph.
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 2026-10-01. Each event’s entry at NCEI: 5412995, 5412932.