1 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 Phoenix, AZ wrote its last area forecast discussion before the first event at Aug 10, 3:05 AM MST, 2 hours 25 minutes earlier.
AZZ020>028-CAZ030>033-101745- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 305 AM MST FRI AUG 10 2001 .SYNOPSIS... HIGH PRESSURE WHICH HAS BEEN CENTERED TO THE WEST OF ARIZONA THE PAST FEW DAYS WILL REPOSITION ITSELF TO NEAR THE FOUR CORNERS OVER THE WEEKEND. THIS WILL HELP TO SHIFT THE MID AND UPPER LEVEL WINDS TO THE EAST OR NORTHEAST...KEEPING LOTS OF MOISTURE IN PLACE ACROSS THE FORECAST AREA. AS A RESULT...A THREAT OF SHOWERS AND THUNDER- STORMS WILL BE THE RULE TODAY THROUGH SATURDAY...MAINLY OVER SOUTH- CENTRAL ARIZONA. BY SUNDAY AND THEREAFTER...A CHANCE OF SHOWERS AND THUNDERSTORMS WILL EXIST ALL THE WAY INTO SOUTHEAST CALIFORNIA THANKS TO THE DEEPENING EASTERLY FLOW. .DISCUSSION... REGIONAL 88DS SHOWING STUBBORN BATCH OF CONVECTION MOVING SWD FROM COCONINO AND YAVAPAI COUNTIES. SOME OF THEM ARE MAKING IT INTO MARICOPA AND ERN LA PAZ COUNTIES EARLY TODAY. WILL MASSAGE FORECASTS TO ACCOUNT FOR EARLY MORNING ACTION. OTHERWISE...A SHIFT IN THE SYNOPTIC SCALE PRESSURE PATTERN IS UNDERWAY...WITH ALL MODELS NOW AGREEING THAT UPPER HIGH WILL BECOME REPOSITIONED TO OUR N RATHER THAN OUR W. THIS WILL RESULT IN A SHIFT TO A MORE ELY STEERING FLOW WITH TIME...RETURNING US TO A MORE NORMAL MONSOON PATTERN. NOT READY TO BUY COMPLETELY INTO AVN TREND OF MOVING STRONG INVERTED TROUGH BACK INTO SE AZ OVER THE WEEKEND...IT HAS BEEN ATROCIOUS WITH OVER- FORECASTING SPURIOUS VORT FEATURES ALL SUMMER. THERE MAY INDEED BE SOME TOO-WEAK-TO-NOTICE DISTURBANCES THAT COULD EVENTUALLY HELP TO TRIGGER CONVECTION OVER THE WEEKEND IN THIS DEVELOPING ELY FLOW... BUT CERTAINLY HARD TO SEE THEM NOW. STILL...ELY FLOW GOOD FOR PROPOGATING CONVECTION OFF THE HIGH COUNTRY. AND...THE MOISTURE CERTAINLY IS NOT GOING TO GO ANYWHERE...SO LOOKS LIKE WE ARE GOING TO MAINTAIN A RATHER MEDIUM GRADE MONSOON OVER THE FORESEEABLE FUTURE. INHERITED A CHANCE DURING THE EXTENDED EVEN OUT IN FAR WRN CWFA...AND WITH DEEP ELY FLOW SETTING UP...THIS APPEARS REASONABLE. TEMPS WILL BE HARD TO PREDICT FROM DAY-TO-DAY DUE TO AMOUNT AND PERSISTENCE OF DAILY BATCH OF DEBRIS CLOUDS. WILL JUST BROAD-BRUSH FOR NOW AND KEEP HOTTEST DESERTS AROUND THE 110 DEGREE MARK. ESTLE
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Many streets and roads flooded during the early morning hours after rainfalls of one to two inches covered the area.
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, August 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: 5262748.