1 thunderstorm wind, as filed by the National Weather Service.
Every event with a place to put it. 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 14, 4:05 PM MST, 1 hour earlier.
AZZ020>028-CAZ030>033-150545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 405 PM MST TUE AUG 14 2001 .SYNOPSIS... ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS CAN BE EXPECTED THIS EVENING...OVER SOUTH-CENTRAL AND SOUTHWEST ARIZONA. MEANWHILE... DRIER AND MORE STABLE AIR OVER SOUTHEAST CALIFORNIA WILL LIMIT EVENING STORMS TO THE LOWER COLORADO RIVER VALLEY. . UPPER LEVEL HIGH PRESSURE PUSHING IN FROM THE WEST WILL LEAD TO HIGHER DAYTIME TEMPERATURES BUT LESS HUMIDITY. DRIER AIR EXPECTED TO INFILTRATE MOST OF ARIZONA BY THURSDAY...FOR DECREASING CHANCES OF DAILY THUNDERSTORMS. BY EARLY NEXT WEEK...THE HIGH WILL SHIFT TOWARD THE EAST AND WILL ALLOW MOISTURE AND THUNDERSTORMS TO RETURN TO THE FORECAST AREA. .DISCUSSION... ACTIVE LATE AFTERNOON AND EVENING SHAPING UP FOR THE ARIZONA PORTION OF THE CWA TODAY. SO FAR...VERY STRONG-LOOKING STORMS SEEM TO BE STRUGGLING TO PRODUCE SEVERE CRITERIA. BUT WITH ABUNDANT MOISTURE AND STRONGER THAN NORMAL NORTHEASTERLY STEERING FLOW...EXPECT TO SEE STORMS PRIMARILY IN ZONES 21...22...23...AND 24 DURING THE NEXT SEVERAL HOURS. SPC WILL BE ISSUING A WATCH BOX FROM THE LOWER COLORADO RIVER VALLEY WESTWARD TO WESTERN MARICOPA COUNTY. PHOENIX METRO LEFT OUT OF WATCH DUE TO TIMING SINCE STORMS ARE ALREADY HERE AND WILL END SOONER. ON WEDNESDAY...STEERING FLOW REMAINS NORTHEASTERLY...BUT MOISTURE IS ADVERTISED TO RETREAT SOUTHEASTWARD. HOWEVER...THERE SHOULD BE ENOUGH MOISTURE AROUND TO GET STORMS OVER THE HIGHER TERRAIN WHICH CAN THEN PROPAGATE INTO THE LOWER ELEVATIONS OF SOUTH-CENTRAL ARIZONA. BELIEVE AVN TOO QUICK WITH DRYING AND HAS SHOWN A BIAS IN THAT REGARD. BY THURSDAY...DRYING SHOULD LEAD TO A LOW GRADE MONSOON DAY. WITH THE DRYING WILL COME HIGHER TEMPERATURES. IN THE EXTENDED...12Z AVN SHOWS MORE OF A SOUTHWESTERLY FLOW INFLUENCING OUR CWA THAN 00Z MRF. THUS PUSHED BACK RETURN OF STORM CHANCE FOR MANY OF THE ZONES. ECMWF SUPPORTS THIS AS WELL. JAMISON
AZZ020>028-150200-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
1245 PM MST TUE AUG 14 2001
...HAZARDOUS WEATHER POSSIBLE OVER SOUTH-CENTRAL AND SOUTHWEST
ARIZONA THIS AFTERNOON AND TONIGHT...
COUNTIES IN THE RISK AREA INCLUDE:
IN ARIZONA...MARICOPA...NORTHWEST PINAL...SOUTHERN GILA...LA
PAZ AND YUMA.
THE PRIMARY HAZARDOUS WEATHER RISKS INCLUDE:
LOCALIZED VERY HEAVY RAIN...AND STRONG GUSTY WINDS.
STORM SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND
TONIGHT.
JAMISONAZZ020>028-150200-
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PHOENIX AZ
1245 PM MST TUE AUG 14 2001
...HAZARDOUS WEATHER POSSIBLE OVER SOUTH-CENTRAL AND SOUTHWEST
ARIZONA THIS AFTERNOON AND TONIGHT...
COUNTIES IN THE RISK AREA INCLUDE:
IN ARIZONA...MARICOPA...NORTHWEST PINAL...SOUTHERN GILA...
LA PAZ AND YUMA.
THE PRIMARY HAZARDOUS WEATHER RISKS INCLUDE:
LOCALIZED VERY HEAVY RAIN...AND STRONG GUSTY WINDS.
STORM SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND
TONIGHT.
JAMISONThe Phoenix radar (KIWA), 21 km away, was scanning. The volume nearest the first event began at 00:02 UTC.
1 thunderstorm wind. Local standard time, as filed.
Severe thunderstorm wind gusts damaged a tile roof on a single resident home, and blew down nearby street signs.
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: 5262759.