Scattered thunderstorms moved west across southeast Arizona. One storm produced tree damage in Green Valley.
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 episode as NWS TWC wrote it up.
Scattered thunderstorms moved west across southeast Arizona. One storm produced tree damage in Green Valley.
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 31, 2:20 PM MST, 1 hour 40 minutes earlier.
Area Forecast Discussion National Weather Service Tucson AZ 220 PM MST Mon Jul 31 2017 .SYNOPSIS...The weather pattern will remain favorable for daily thunderstorms most days this week. With the moisture, high temperatures will generally be near or below average. && .DISCUSSION...The Tucson morning upper-air sounding indicated some warming in the mid-levels with a slightly drier air mass in place today compared to over the weekend. The steering flow remained rather weak, so still looking at slow moving thunderstorms. Given the saturated soils in many locations and elevated PW values, runoff problems and a flash flooding will remain a concern for today. The sounding profile supported strong outflow winds in addition to the heavy rainfall potential. After today, models were still advertising a favorable flow pattern for daily showers and thunderstorms this week. Latest operational GFS and GEFS solutions lean toward more coverage in rainfall late tomorrow into Wednesday. This looked reasonable based on a couple of subtle disturbances tracking northwest over Mexico that could influence the area around tuesday night and Wednesday. Otherwise, high temperatures will hover around normal through the week. && .AVIATION...Valid thru 02/00Z. SCT-BKN clouds above 10k ft AGL with isolated to scattered TSRA/SHRA through late this evening at all terminals. Brief MVFR cigs/visibilities possible in/near TSRA. SFC wind variable in direction mainly less than 12 kts, except in the vicinity of TSRA where gusts may exceed 40 kts. More TSRA developing Tuesday. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Fire weather concerns are low through the next week. Daily shower and thunderstorm chances will persist this week across most of southeast Arizona. Daytime temperatures will generally be at or below normal with elevated relative humidities. Outside of gusty thunderstorm winds, expect 20-foot winds to remain at or below 15 mph and follow typical upslope/down valley diurnal patterns. && .TWC WATCHES/WARNINGS/ADVISORIES...None. && Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The Tucson radar (KEMX), 36 km away, was scanning. The volume nearest the first event began at 23:02 UTC.
1 thunderstorm wind. Local standard time, as filed.
Five inch diameter mesquite tree snapped in half off Duval Mine Road 5 miles west of Green Valley.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2017Every state in 2017This day in weather historyWarnings in Arizona, July 2017
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: 714249.