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 Sep 19, 6:45 AM MST, 1 hour 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 645 AM MST SUN SEP 19 2004 .SYNOPSIS...SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS NORTHERN ARIZONA TODAY. THE RAIN WILL BE HEAVY AT TIMES...ESPECIALLY OVER THE HIGHER ELEVATIONS OF YAVAPAI COUNTY...GILA COUNTY...THE MOGOLLON RIM...AND THE WHITE MOUNTAINS. IN ADDITION TO THE RAIN...LOCALLY WINDY CONDITIONS ARE EXPECTED ACROSS THE REGION AS A COLD FRONT APPROACHES FROM THE WEST. THIS FRONT WILL END THE RAINFALL MONDAY AFTERNOON OR EVENING...AND WILL BRING COOLER TEMPERATURES TO MUCH OF THE STATE FOR NEXT WEEK. && .DISCUSSION... ...DISCUSSION DELAYED DUE TO ACTIVE WEATHER... STRONG UPPER THROUGH TO MOVE ACROSS THE AREA TODAY AND MONDAY. DEEP SUBTROPICAL MOISTURE IS BEING PULLED NORTHWARD AHEAD OF THE TROUGH. A STRONG JET ALOFT IS HELPING LIFT THE ATMOS OVER NORTHERN ARIZONA. THE ATMOS IS COOLING ALOFT...ESPECIALLY OVER NORTHWEST SECTIONS OF THE STATE TODAY...THIS WILL TEND TO HELP INCREASE LAPSE RATES THERE. THE VERTICAL SHEAR IS STRONG AS WELL TODAY ESPECIALLY WITH 700 MB WINDS AROUND 40 TO 50 KNOTS. THIS WILL TEND TO PROVIDE ENOUGH SHEAR FOR SUPERCELLS. HOWEVER WITH CLOUD COVER...INSOLATION IS WEAKER WHICH MAY INHIBIT SEVERE THUNDERSTORM DEVELOPMENT. IF SKIES CLEAR ENOUGH LATER THIS MORNING AND AFTERNOON WE MAY SEE ANOTHER CHANCE FOR ISOLATED SEVERE STORMS. && .FGZ WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH AZ ZONES 006>008...015>018/37/38 UNTIL MIDNIGHT MST TONIGHT. &&
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Flash flooding washed out a bridge and came within one foot of covering another bridge in Supai Village. People were evacuated from Supai Canyon.
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: 5424289.