Isolated thunderstorms moved southwest across southeast Arizona. One storm caused extensive tree damage in Tucson.
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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.
Isolated thunderstorms moved southwest across southeast Arizona. One storm caused extensive tree damage in Tucson.
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 Jun 30, 1:15 PM MST, 1 hour earlier.
Area Forecast Discussion National Weather Service Tucson AZ 115 PM MST Wed Jun 30 2021 .SYNOPSIS...Scattered thunderstorms are expected into this evening, primarily over higher terrain and from Tucson south and west. Thereafter expect widely scattered to scattered showers and thunderstorms through the weekend with high temperatures generally a few degrees cooler than average. && .DISCUSSION...Convective development ongoing early this afternoon as expected, initially across the higher terrain with gradual development in valley locations. Considerable cloudiness east of a line from Bisbee-Safford may limit convection for these areas with more general scattered shower activity. PWAT values currently range from 1.25" to 1.5" from Tucson westward and 1.1" to 1.3" east of Tucson. These values are certainly high enough to generate locally heavy rainfall where enough solar insolation occurs, especially given fairly slow storm motion towards the south and southwest less than 10 mph. The main concern will continue to be across burn scar regions including the Bighorn on the Catalinas as flash flooding can occur there with as little as 0.5" per hour. Showers and perhaps a few thunderstorms have the potential to linger well into the evening hours aided by the inverted trough over far eastern sections of the area. PWAT values are progged to be on the increase on Thursday, at or above 1.5" for areas from Tucson westward. However, there is considerable uncertainty on how Thursday shakes out and much of that will depend on what evolves today and tonight. There is the potential for considerable cloudiness limiting convective development. However, in areas that get enough sun, showers and thunderstorms may produce areas of heavy rainfall given the deeper moisture profile. Looking at Friday and through the weekend, an overall favorable early monsoon pattern will continue for early July as inverted troughiness extending northward from Sonora may give convection a bit of a boost. The general steering pattern will be from the east as the high pressure aloft remains centered to our north. Still plenty of moisture into early next week as well for daily rounds of mainly afternoon and evening showers and thunderstorms as the high remains to our north. High temperatures will remain a few degrees below normal through Monday then increase to near normal values by the middle of next week. && .AVIATION...Valid through 02/00Z. Expect SCT-BKN clouds 10k-14k ft MSL for most of the period. Scattered SHRA/TSRA will be possible over most of the area through about 01/04Z with perhaps a bit of a lull overnight, then increasing aft 01/18Z. Wind gusts 40-50 kts will be possible near TSRA. Otherwise, SFC winds mostly ELY/SELY 8-12 kts with gusts to 20 kts in the afternoon. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Monsoonal moisture continues to increase across southeast Arizona, allowing for daily showers and thunderstorms through the weekend. Minimum humidities generally reach the 20s and 30s in the lower elevations and 40s in the mountains with very good overnight recoveries. Easterly breezes continue for much of the area, gradually shifting to a typical diurnal pattern Friday into the weekend with speeds less than 15 mph. && .TWC WATCHES/WARNINGS/ADVISORIES... None. && Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The Tucson radar (KEMX), 53 km away, was scanning. The volume nearest the first event began at 21:16 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds damaged or uprooted 35 shallow-rooted trees at Evergreen Cemetery in Tucson.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2021Every state in 2021This day in weather historyWarnings in Arizona, June 2021
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: 970021.