1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 Flagstaff, AZ wrote its last area forecast discussion before the first event at Aug 6, 9:20 AM MST, 4 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 920 AM MST FRI AUG 06 2004 .SYNOPSIS...MOIST SOUTHERLY FLOW WILL AFFECT THE REGION TODAY. AS A RESULT...EXPECT SCATTERED SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING. SLIGHTLY DRIER WESTERLY FLOW ALOFT WILL BEGIN ON SATURDAY AND SUNDAY. THIS WILL DIMINISH THE AMOUNT OF SHOWER ACTIVITY ACROSS THE AREA INTO EARLY NEXT WEEK. TEMPERATURES WILL REMAIN AROUND NORMAL. && .DISCUSSION...STRONG PUSH OF MOIST SOUTHERLY FLOW WILL AFFECT THE REGION TODAY...AND IS ALREADY AFFECTING THE DESERT REGIONS. SURFACE DEWPOINTS AND PW VALUES HAVE INCREASED SIGNIFICANTLY IN THE LAST 24 HOURS...AND WE HAVE LESS CLOUD COVER TO START THE DAY. MESO-ETA MODEL RUNS FROM 12Z SHOWING A THETA MAX ALONG AND NORTH OF THE RIM TODAY. THIS REGION FROM JUST NORTH OF DEVELOPING CONVECTION OVER PHOENIX AND THE NORTHERN EXTENT OF THE PW RIDGE WILL BE THE FOCUS FOR STRONGER CONVECTION AND HEAVY RAINS. MODEST SHEAR VALUES ALSO EXIST NORTH OF FLAGSTAFF...SO THERE IS A THREAT OF ISOLATED SEVERE CELLS. MID LEVEL HIGH SHIFTS WEST AFTER TODAY...BUT BY THAT TIME PLENTY OF MOISTURE WILL BE RE-CIRCULATING AROUND THE RIDGE FOR SCATTERED ACTIVITY THROUGH THE WEEKEND. ZONES COVERING THESE TRENDS FOR NOW...NO UPDATES NEEDED THIS MORNING. PETERSON. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST FRI AUG 6 2004 AZZ004>018-037>040-071400- WESTERN MOGOLLON RIM-GRAND CANYON COUNTRY-YAVAPAI COUNTY MOUNTAINS- YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS- MARBLE AND GLEN CANYONS-KAIBAB PLATEAU-COCONINO PLATEAU- NORTHEAST PLATEAU AND MESAS HWY 264 NORTHWARD- NORTHEAST PLATEAU AND MESAS SOUTH OF HWY 264- CHINLE VALLEY-CHUSKA MOUNTAINS AND DEFIANCE PLATEAU- BLACK MESA AREA-LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- EASTERN MOGOLLON RIM-WHITE MOUNTAINS-NORTHERN GILA COUNTY- 930 AM MST FRI AUG 6 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY MOISTURE VALUES HAVE INCREASED ACROSS THE REGION TODAY COMPARED TO THURSDAY. SCATTERED SHOWERS AND THUNDERSTORMS ARE ALREADY FORMING SOUTH OF THE MOGOLLON RIM TOWARDS PHOENIX. THE CLOUD COVER THAT INHIBITED THUNDERSTORM DEVELOPMENT THURSDAY HAS DECREASED THIS MORNING ALLOWING FOR STRONGER HEATING. THE COMBINATION OF WARMER MORNING TEMPERATURES AND MORE MOISTURE WILL LEAD TO AN ACTIVE DAY TODAY ACROSS PORTIONS OF NORTHERN AND CENTRAL ARIZONA. THE MOST FAVORABLE AREA FOR STRONG THUNDERSTORM DEVELOPMENT WILL BE ROUGHLY ACROSS EASTERN YAVAPAI COUNTY...NORTHERN GILA COUNTY...THE MOGOLLON RIM....AND PORTIONS OF THE WESTERN LITTLE COLORADO RIVER VALLEY AND THE PAINTED DESERT. THESE AREAS WILL HAVE THE MOST FREQUENT THUNDERSTORMS TODAY AND HAVE THE BEST CHANCE FOR ISOLATED STRONGER STORMS CONTAINING HEAVY RAIN...AND HAIL UP TO AN INCH IN DIAMETER. SCATTERED SHOWERS AND THUNDERSTORMS WILL OCCUR OVER THE REMAINDER OF THE REGION AS WELL TODAY...BUT WILL NOT BE AS WIDESPREAD OR AS STRONG. STORM MOVEMENT WILL BE FROM THE SOUTHWEST TO THE NORTHEAST TODAY AROUND 15 MPH. THIS WILL DECREASE THE CHANCE FOR FLOODING AND DUE TO THE LACK OF RAINFALL RECENTLY...THE CHANCES FOR FLOODING REMAIN LOW. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SLIGHTLY DRIER AIR WILL MOVE ACROSS THE REGION OVER THE WEEKEND AND INTO EARLY NEXT WEEK. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP EACH DAY...MAINLY OVER HIGHER TERRAIN. THE CHANCES FOR WIDESPREAD HEAVY RAIN DURING THIS PERIOD ARE LOW. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Flagstaff radar (KFSX), 124 km away, was scanning. The volume nearest the first event began at 20:32 UTC.
1 flash flood. Local standard time, as filed.
The Agua Fria River was up 6 feet and washed out the Prescott Drive low water crossing in Humboldt.
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, August 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: 5419987.