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, 10:40 AM MST, 5 hours 23 minutes earlier.
AZZ020>028-CAZ030>033-142245- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 1040 AM MST TUE AUG 14 2001 .SYNOPSIS... A WEAK DISTURBANCE ACROSS ARIZONA TODAY WILL SERVE TO PRODUCE ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING...MAINLY OVER SOUTH-CENTRAL ARIZONA. MEANWHILE...SOMEWHAT DRIER AND MORE STABLE AIR MOVING IN FROM THE WEST WILL PROVIDE FOR ONLY SPARSE THUNDERSTORM ACTIVITY IN SOUTHEAST CALIFORNIA. UPPER LEVEL HIGH PRESSURE PUSHING IN FROM THE WEST AFTER MIDWEEK WILL MAKE FOR HOTTER DAYTIME TEMPERATURES...WITH DRIER AIR EXPECTED TO INFILTRATE MOST OF SOUTH-CENTRAL ARIZONA...FOR DECREASING CHANCES OF DAILY THUNDERSTORMS. BY EARLY NEXT WEEK...THE HIGH WILL MOVE NORTH OF THE REGION AND WILL ALLOW MOISTURE AND THUNDERSTORMS TO RETURN TO THE FORECAST AREA. .DISCUSSION... PLOTS SHOW HIGH MOISTURE VALUES AT 850 AND 700 MB AGAIN...EVEN IN SOUTHEAST CALIFORNIA. MODEST HEIGHT FALLS EVIDENT AT 500 MB. A COL AREA AT THE 300/250 MB LEVELS WAS PRESENT OVER PORTIONS OF SOUTHEAST CALIFORNIA AND WESTERN ARIZONA WITH WITH A SHORTWAVE TROUGH OVER THE GREAT BASIN. SOME SLIGHT COOLING OF THE TEMPERATURE PROFILES HAS TAKEN PLACE SINCE YESTERDAY MORNING ALONG WITH SOME DECREASES IN PWATER...ESPECIALLY AT DRA AND 1Y7. WIND PROFILES HAVE SHOWN SOME VEERING IN THE MID AND UPPER LEVELS. NO BIG CHANGES IN CAPE EXCEPT WHERE THERE WAS SIGNIFICANT DRYING. OTHERWISE...ONLY MINOR CHANGES IN STABILITY THROUGH TEMPERATURE PROFILE CHANGES WITH SLIGHTLY COOLER TEMPS ALOFT AND SLIGHTLY WARMER TEMPS IN THE LOWER LEVELS. MODELS SHOW STEERING FLOW FOR OUR CWA TO BECOME NORTHEASTERLY BY THIS AFTERNOON. THE UPPER LEVEL COL AREA IS PROGGED TO SLIDE SOUTHWARD AWAY FROM US FOR LESS HELP IN STORM ACTIVITY. HOWEVER SOME DIFFLUENCE SHOULD BE AROUND...MAINLY OVER SOUTHWEST ARIZONA AND SOUTHEAST CALIFORNIA. PROGS CONTINUE TO SHOW DRYING TREND AS RIDGE AXIS BUILDS INTO THE WEST. AVN FASTER WITH DRYING THAN ETA...BUT IT APPEARS THEY HAVE SLOWED THE DRYING A BIT. IN SHORT TERM...WOULD EXPECT ANOTHER ACTIVE PERIOD NEXT 12 HOURS OR SO. BY THURSDAY...DRIER AIR THROUGH A DEEP LAYER SHOULD BE IN PLACE FOR A SIGNIFICANT DECREASE IN THUNDERSTORM ACTIVITY. BELIEVE THE AVN TOO QUICK WITH DRYING SO EXPECT SOME MENTION OF STORM ACTIVITY WEDNESDAY NIGHT. HOWEVER...IT WILL HAVE TO COME IN FROM THE HIGHER TERRAIN WITH MAINLY SOUTH-CENTRAL ARIZONA PORTION OF CWA HAVING THE MAIN THREAT. 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), 55 km away, was scanning. The volume nearest the first event began at 23:01 UTC.
1 thunderstorm wind. Local standard time, as filed.
Severe thunderstorm wind gust reported by trained spotter at the intersection of Hwy 101 and 51st Ave.
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: 5262352.