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 15, 2:30 PM MST, 2 hours 5 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 949 AM MST SAT SEP 15 2001 .SYNOPSIS...ABUNDANT SUBTROPICAL MOISTURE ACROSS THE REGION WILL BRING ANOTHER ROUND OF THUNDERSTORMS TO THE REGION TODAY. SOME OF THE STORMS WILL PRODUCE HEAVY RAINFALL...ESPECIALLY OVER CENTRAL ARIZONA. A CHANCE OF SHOWERS AND THUNDERSTORMS WILL RETURN SUNDAY AND MONDAY. MUCH DRIER WESTERLY FLOW WILL TAKE HOLD BY TUESDAY... WITH DRY AND WARM CONDITIONS EXPECTED THE REMAINDER OF THE WEEK. .DISCUSSION...GOOD FORECAST FROM THE EARLY MORNING PACKAGE. MAIN HIGHLIGHTS .4 INCH PRECIP WATER ALONG THE UTAH AND ARIZONA BORDER INCREASING TO AROUND AND INCH SOUTHERN YAVAPAI AND NORTHERN GILA COUNTIES. SOUNDING FROM THE MESO ETA SHOWING INVERTED V SOUNDINGS TO THE NORTH...DYNAMIC FORCING (DIVQ AND OMEGA) WEAK SO THUNDERSTORMS ROUGHLY NORTH OF I-40 WILL HAVE THE POTENTIAL OF PRODUCING SOME STRONG GUSTY WIND AND SMALL HAIL. TO THE SOUTH OF INTERSTATE 40 MOISTURE IS DEEPER...MESO ETA SOUNDINGS SUGGEST STEEPER LAPSE RATES...FLOW IS WEAK AS WELL AS THE DYNAMIC FORCING DOWN IN THE NOISE LEVEL...SO THE STORMS ALONG AND SOUTH OF I-40 WILL BE STRONG PULSE AND TERRAIN DRIVEN...WITH THE MAIN THREAT...LOCALIZED HEAVY RAINFALL. CLEMMONS .FGZ...NONE.
The Flagstaff radar (KFSX), 150 km away, was scanning. The volume nearest the first event began at 23:33 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain caused a levy to break in southeast Flagstaff allowing water to flow through a home. The flood water also caused extensive damage to landscaping in seven other homes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2001Every state in 2001This day in weather historyWarnings in Arizona, September 2001
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: 5267871.