A late evening severe thunderstorm pushed through Graham County south of Safford resulting in wind gusts over 70 mph.
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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 late evening severe thunderstorm pushed through Graham County south of Safford resulting in wind gusts over 70 mph.
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 Aug 11, 1:15 PM MST, 9 hours 30 minutes earlier.
Area Forecast Discussion National Weather Service Tucson AZ 115 PM MST Sun Aug 11 2024 .SYNOPSIS... Isolated to scattered mainly afternoon and evening thunderstorms each day through the middle of next week, with a few isolated showers and thunderstorms over the next couple mornings. Thunderstorms will have the potential for heavy rainfall and strong wind gusts. High temperatures will be within a few degrees of normal through the next week. && .DISCUSSION... The upper high remains centered over the Southern Great Plains, with moist south to southeasterly flow over Arizona. Of note on satellite imagery was a Mesoscale Convective Vortex (MCV) feature that developed last night and is slowly moving through the region. The extensive cloud cover associated with this MCV will likely keep convective instability at bay today, especially west of Tucson. The convective launchpoint should be in Graham/Greenlee/Cochise Counties, where more clearing will lead to more activity. With a generally SE to NW storm motion, these storms may still move toward the Tucson metro later in the day. The atmosphere remains very moist with PW values around 1.5", and both flash flooding and strong winds remain to be threats. The pattern remains similar on Monday, with moist southerly flow continuing over southern Arizona. Similar to today, Monday's activity will be dependent on how long the convection lingers into tonight. If we do see some clearing tomorrow morning, models do continue to point toward a more active day. Starting Tuesday, and especially Weds-Fri this week, a subtle but meaningful pattern shift will take place as an upper ridge builds eastward from the Pacific over Arizona. This should effectively cut off the southerly moisture tap for a couple days, and increased subsidence will result in lower probabilities for convection along with a brief warming trend. The upper ridge moves eastward toward next weekend, potentially resuming the moisture tap and chances for convection. && .AVIATION...Valid through 13/00Z. Scattered to broken clouds at 7k to 10k feet with isolated to scattered TSRA through about 12/04Z. Visibility restrictions, gusts to 45 kts, heavy rain, and mountain obscurations likely with any thunderstorm this afternoon and evening. Wind outside of thunderstorms will be less than 12 kts and favor a west to southwesterly direction. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER... Daily chances for thunderstorms continue each afternoon and evening through Tuesday. A downturn in thunderstorm chances is possible Wednesday through Friday. Minimum relative humidity values 25 to 40 percent in the valleys through mid-week. Outside of thunderstorm outflow winds, 20-foot winds will generally be 15 mph or less, with afternoon/early evening gusts to 20-25 mph and light winds overnight. && .TWC WATCHES/WARNINGS/ADVISORIES... None. && Public...Dang Aviation...Dang Fire Weather....Dang Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The Tucson radar (KEMX), 124 km away, was scanning. The volume nearest the first event began at 05:45 UTC.
1 thunderstorm wind. Local standard time, as filed.
A personal weather station from a trained spotter recorded a wind gust of 74 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2024Every state in 2024This day in weather historyWarnings in Arizona, August 2024
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: 1211490.