A thunderstorm complex near Phoenix on the evening of July 21st produced a strong outflow boundary that pushed through much of Pinal and Pima counties. Other scattered thunderstorms in Pima county produced locally damaging downburst winds.
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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.
A thunderstorm complex near Phoenix on the evening of July 21st produced a strong outflow boundary that pushed through much of Pinal and Pima counties. Other scattered thunderstorms in Pima county produced locally damaging downburst winds.
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 Jul 21, 1:19 PM MST, 6 hours 3 minutes earlier.
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</html>The Tucson radar (KEMX), 123 km away, was scanning. The volume nearest the first event began at 02:22 UTC.
1 thunderstorm wind, 1 dust storm. Local standard time, as filed.
Severe thunderstorm downburst winds downed several power poles and 10 power lines west of Sells. This caused a power disruption to the Papago Farms, Pisinimo, and Hickiwan areas.
A trained spotter reported near zero visibility in blowing dust at mile marker 214 along Interstate 10.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2009Every state in 2009This day in weather historyWarnings in Arizona, July 2009
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 2026-10-01. Each event’s entry at NCEI: 173888, 173543.