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 16, 9:25 PM MST, 2 hours 5 minutes earlier.
AZZ020>028-CAZ030>033-171045- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 925 PM MST THU AUG 16 2001 .SYNOPSIS... HIGH PRESSURE ALOFT WILL STRENGTHEN AND BECOME CENTERED NEAR LAS VEGAS BY FRIDAY EVENING...THEN DRIFT ACROSS FAR NORTHERN ARIZONA ON SATURDAY. AS A RESULT...HOT DAYTIME HIGHS AND DRY CONDITIONS ARE EXPECTED THE NEXT COUPLE OF DAYS OVER SOUTHWEST ARIZONA AND FAR SOUTHEAST CALIFORNIA. THERE WILL BE A SLIGHT CHANCE FOR A LATE AFTERNOON OR NIGHTTIME THUNDERSTORM...MAINLY OVER HIGHER TERRAIN LOCATIONS IN ARIZONA. A BETTER CHANCE FOR STORMS WILL EXIST ACROSS SOUTHWEST AND SOUTH CENTRAL ARIZONA SUNDAY AND MONDAY AS A DISTURBANCE MOVES NORTHWEST ACROSS THE AREA. THE RIDGE OF HIGH PRESSURE IS FORECAST TO MOVE SOUTH OF THE FORECAST AREA EARLY NEXT WEEK...WHICH WOULD LEAD TO DRIER CONDITIONS AND SOMEWHAT LOWER DAYTIME HIGH TEMPERATURES. .DISCUSSION... ONLY ONE THUNDERSTORM WAS NOTED IN THE CWA AT 0345Z IN SOUTHERN GILA COUNTY. OTHERWISE...THE OVERALL CONVECTIVE PATTERN WAS NEARLY SIMILAR TO YESTERDAYS DEVELOPMENT. T-STORMS IN NORTHERN ARIZONA WERE ASSOCIATED WITH UPPER LEVEL DIFLUENT FLOW MOVING AROUND A 300/250 MB CALIFORNIA RIDGE...AND T-STORMS IN SOUTHEAST AZ WERE ASSOCIATED WITH A SOUTHWEST/NORTHEAST ORIENTED DEFORMATION ZONE. THE SOUTHEAST AZ DEFORMATION ZONE MOVED NORTH FROM YESTERDAYS POSITION NEAR THE SOUTHEAST CORNER...HOWEVER NOT FAR ENOUGH NORTH (AS YESTERDAYS MODELS WERE PREDICTING) TO EFFECT THE EASTERN PORTIONS OF OUR CWA. THE UPPER LEVEL DEFORMATION ZONE AND ASSOCIATED CONVECTION EXTENDED ALONG A LINE FROM THE WHITE MOUNTAINS IN EAST CENTERAL AZ...TO ORGAN PIPE NATIONAL MONUMENT IN SOUTH CENTRAL AZ NEAR THE MEXICAN BORDER. LARGE CONVECTION DEVELOPED NEAR ORGAN PIPE NATL MONUMENT...HOWEVER MOST CONVECTION WAS LOCATED IN SOUTHEAST AZ. 00Z PLOT DATA ALSO SHOWED MONSOON MOISTURE OVER THE SOUTHERN HALF OF THE STATE CONTINUED TO THIN OVER YESTERDAY. HOWEVER WHATS COMPENSATING FOR THE LOSS OF MOISTURE...AND GENERATING INSTABILITY ...WERE THE RELATIVELY COOL 500 MB TEMPERATURES ADVECTING INTO AZ UNDER NORTHEASTERLY FLOW ALOFT. BOTH THE NEW ETA AND AVN MODELS FORECAST THE SOUTHEAST AZ DEFORMATION ZONE TO MOVE A LITTLE FARTHER NORTH FRIDAY...TO A POSITION THAT SHOULD FAVOR MORE AFTERNOON/EVENING CONVECTION OVER THE EASTERN MOGOLLON RIM AND WHITE MOUNTAINS. 500 MB NORTHEASTERLY STEERING CURRENTS...AND CONTINUED COOL ADVECTION... PROMISE TO MOVE THESE MOUNTAIN STORMS TOWARD THE LOWER DESERTS FRIDAY EARLY EVENING. FOR SATURDAY... MODELS FORECAST THE DEFORMATION ZONE TO SHIFT BACK INTO SOUTHEAST AZ...WITH WARMER MID LEVEL TEMPERATURES. THIS IS DUE TO THE 300/250 MB CA RIDGE NOSING INTO THE NORTHERN HALF OF AZ...FOR A LITTLE MORE STABILITY OVER THE CWA. UPDATES TO FIRST PERIOD WILL BE TO CONTINUE A SLIGHT CHANCE FOR STORMS THROUGH MIDNIGHT. VASQUEZ
The Phoenix radar (KIWA), 15 km away, was scanning. The volume nearest the first event began at 06:28 UTC.
1 thunderstorm wind. Local standard time, as filed.
Severe thunderstorm wind gusts blew down electric power poles between southern Chandler and southeast Mesa.
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: 5262758.