Monsoonal moisture produced severe thunderstorms with wind damage on the Northwest side of Tucson and east of Ajo in Western Pima County.
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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 episode as NWS TWC wrote it up.
Monsoonal moisture produced severe thunderstorms with wind damage on the Northwest side of Tucson and east of Ajo in Western Pima County.
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 Tucson, AZ wrote its last area forecast discussion before the first event at Sep 1, 2:00 PM MST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 200 PM MST SAT SEP 1 2007 .SYNOPSIS...THERE WILL BE ENOUGH MOISTURE FOR ISOLATED AFTERNOON AND EVENING THUNDERSTORMS OVER THE WEEKEND. SOME INCREASE IN MOISTURE LATER IN THE WEEK WILL BRING A BETTER CHANCE OF THUNDERSTORMS AND LOWER DAYTIME TEMPERATURES. && .DISCUSSION...ISOLATED CONVECTION FORMING UP WITH A FEW STRONG STORMS ALREADY. EXPECT SCATTERED COVERAGE FOR THE MOUNTAINS WITH LESS COVERAGE FOR LOWER ELEVATIONS...BUT INVERTED V PROFILE HIGHLIGHTS MICROBURST POTENTIAL. BEST LOWER ELEVATION COVERAGE PROBABLY LATER WITH DEEPER MOISTURE ACROSS CENTRAL TO WESTERN AREAS...BUT OUTFLOWS FROM MORE ORGANIZED NEW MEXICO ACTIVITY COULD GET INTERESTING FOR EASTERN AREAS. DRY SLOT TRYING TO WRAP IN FROM THE PLAINS UNDER THE HIGH OVER THE NEXT COUPLE OF DAYS...PROBABLY LESS THUNDERSTORM COVERAGE SUNDAY AND MONDAY. STILL LOOKING AT TROPICAL MOISTURE INCREASE DIRECTLY OR INDIRECTLY ASSOCIATED WITH THE REMAINS OF HENRIETTE LATER IN THE NEW WEEK...AROUND THURSDAY OR SO. LOTS OF RESOLUTIONS POSSIBLE WITH THIS...FOR RIGHT NOW WE WILL TAKE THE FORECAST BACK INTO THE SCATTERED COVERAGE RANGE FOR THE SECOND HALF OF THE WEEK AND ADJUST FOR TRAJECTORY AND TIMING AS WE GET A BETTER IDEA. && .AVIATION...EXPECT ISOLATED TO SCATTERED TSRA/SHRA THIS AFTERNOON AND EVENING...WITH THE BULK OF ACTIVITY EXPECTED TO END BY AROUND 02/06Z OR SO. CEILINGS AS LOW AS 5-7KFT AGL AND VSBYS AS LOW AS 3-5SM WITH THE STRONGEST TSTMS. SOMEWHAT LESS CONVECTIVE ACTIVITY EXPECTED SUN-MON. SURFACE WINDS TODAY INTO TONIGHT GENERALLY EASTERLY AT 15 KTS OR LESS...BUT MUCH STRONGER AND GUSTY NEAR STORMS WITH ORGANIZED OUTFLOWS POSSIBLE. AVIATION DISCUSSION NOT UPDATED FOR TAF AND TWEB AMENDMENTS. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. WEATHER.GOV/TUCSON
The Phoenix radar (KIWA), 144 km away, was scanning. The volume nearest the first event began at 20:58 UTC.
2 thunderstorm wind. Local standard time, as filed.
Power lines were downed east of Ajo causing a complete power outage across Western Pima County.
An off duty National Weather Service employee reported several large tree limbs broken near Ina Road and Mona Lisa Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2007Every state in 2007This day in weather historyWarnings in Arizona, September 2007
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: 59267, 59268.