1 lightning, 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 May 12, 2:30 PM MST, 5 hours 40 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST SAT MAY 12 2001 SYNOPSIS...HIGH PRESSURE WILL REMAIN OVER DESERT SOUTHWEST INTO EARLY NEXT WEEK. LINGERING MOISTURE WILL FUEL SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS OVER NORTHERN ARIZONA THROUGH MONDAY. DAYTIME HIGH TEMPERATURES WILL COOL SLIGHTLY BUT WILL REMAIN ABOVE NORMAL FOR MOST THE REGION. DISCUSSION...EASTERLY FLOW ALOFT AND AN INCREASE IN LOWER LEVEL MOISTURE FUELING CONVECTIVE ACTIVITY THIS AFTERNOON ALONG EASTERN RIM AND NE CWA. STATIC PATTERN FOR NEXT 48 HRS WITH RIDGE TO THE EAST AND TROF TO THE WEST. SOUTHERN CALIF TROF PROGGED TO LIFT TO THE NORTH WITH PIECES ENERGY ROTATING THRU WESTERN AZ SUNDAY AND MONDAY. NOTED INCREASES IN SFC RH DUE TO OUTFLOW FROM MCS IN N.M. MODELS SHOWING INCREASE IN UPPER LEVEL RH OVER STATE ON SUNDAY AND THEN SHIFTING MOISTURE EASTWARD EARLY NEXT WEEK. ATMOSPHERE TO REMAIN UNSTABLE PER PROGGED LI'S AND LAPSE RATES. MODEL SOUNDING EXHIBITING INVERTED V PROFILE BUT LITTLE IN THE WAY OF SHEAR. EXPECT GUSTY WINDS TO BE MAIN FEATURE OF ANY TSTMS THAT FORM. ETA APPEARS TO BE OVER DOING QPF WHILE AVN UNDER DOING QPF AND COVERAGE. EXPECTING SCATTERED ACTIVITY OVER HIGHER TERRAIN THRU MONDAY WITH LESS ACTIVITY LOWER ELEVATIONS. TEMPERATURES COOL SLIGHTLY DUE MAINLY TO CLOUD COVER. EXTENDED...EURO AND MRF IN FAIR AGREEMENT. GENERAL HIGH PRESSURE PROGGED OVER SW U.S. WITH LOW PRESSURE AREA OFF OF BAJA. POSSIBLE SOUTHERN CALIF TROF INDICATED BY MRF ON LAST DAY OF THE EXTENDED. WIND PATTERN LIGHT THRU PERIOD. DON'T EXPECT RH CURRENTLY OVER THE STATE TO BE SCOURED OUT COMPLETELY. SEE A REPEAT OF THIS PAST WEEK WITH DAYTIME PARTLY CLOUDY SKIES AND ISOLATED SHOWERS WITH CLEARING SKIES AT NIGHT. TEMPERATURES RATHER CONSTANT AS WELL WITH SLIGHT COOLING POSSIBLE TOWARD END OF PERIOD. FOR NOW WILL CONTINUE CURRENT EX:TENDED TREND OF PARTLY CLOUDY DAYS AND CLEAR NIGHTS. DF .FGZ...NONE.
The Flagstaff radar (KFSX), 124 km away, was scanning. The volume nearest the first event began at 03:09 UTC.
1 lightning. Local standard time, as filed.
Lightning strikes caused three homes to catch fire. Two of the homes were completely burned and/or destroyed.
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, May 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: 5243608.