Thunderstorms across Graham and Cochise Counties resulted in severe wind gusts near Safford and Sierra Vista. Flash Flooding also occurred in the Sierra Vista region.
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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.
Thunderstorms across Graham and Cochise Counties resulted in severe wind gusts near Safford and Sierra Vista. Flash Flooding also occurred in the Sierra Vista region.
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 15, 1:34 PM MST, 3 hours 28 minutes earlier.
Area Forecast Discussion National Weather Service Tucson AZ 134 PM MST Mon Jul 15 2024 .SYNOPSIS...Temperatures slightly above normal through the rest of this week, with typical mid July moisture levels across the region. This will result in the daily chances for showers and thunderstorms. The main threats will continue to be strong gusty outflow winds and heavy rainfall leading to localized flash flooding. && .DISCUSSION...Area radars indicate scattered shower/thunderstorm development mainly east/southeast of Tucson and in the White Mountains attm. Movement of the storms was west at 5-10 mph. The GOES-16 ECONUS Total Precipitable Water (PW) imagery continues to show values ranging from near 0.75 inches in the White Mountains, to around 1 inch in Cochise/Graham counties to over 1.50 inches in central/western Pima County. The U of A WRF and SPC HREF models both indicate the areas south/southeast of Tucson to be the most active today, shifting into central Pima County during the evening hours tonight. As for the Tucson metro area, both of these models have minimal convection occuring across Tucson today. However, both models do bring convection into far eastern/southeastern Pima County between 4-6 pm today, so if any organization of these storms takes place, or propagation along outflow boundaries occur, then convection will be a possibility in Tucson. Otherwise, a typical mid July monsoon pattern will continue through the rest of the work week. The mid/upper level high will meander between the Four Corners and west Texas, which keeps southeast Arizona in a favorable east/southeast moisture transport regime. The biggest uncertainty will be the day to day variability in shower and thunderstorm coverage, any big days versus down days, and the amount of debris clouds delaying convection initiation. Overall, each day this week will have the potential for mainly afternoon and evening showers and thunderstorms. By this weekend, an amplified ridge builds across the western United States and the mid/upper level high becomes centered to our north over the Great Basin. This is still a favorable position for monsoon activity across southeast Arizona, although as the mid level flow shifts to more of a northeasterly direction, thunderstorms may have a greater potential of moving off the rim into the lower deserts. High temperatures will be near normal today and then 2-4 degrees above normal through the weekend. The main concerns this week will continue to be the strong, gusty outflow winds and areas of heavy rainfall leading to localized flash flooding. && .AVIATION...Valid through 17/00Z. SCT-BKN clouds at 8k-12k ft AGL thru 16/04Z and again aft 16/18Z, with diminishing cloud cover between 16/04Z and 16/18Z. SCT TSRA/SHRA thru 16/04Z, mainly south/southeast of KTUS and in the White Mountains. SCT TSRA/SHRA developing areawide again aft 16/19Z. MVFR conditions in TSRA, with mountain obscurations, vsby reductions and wind gusts to 40+ knots. Outside of TSRA, SFC wind at most locations 12 knots or less favoring a SWLY thru NWLY direction during the afternoon/early evening hours and variable in direction at other times. The exception will be in the upper Gila River valley near KSAD where WLY/NWLY SFC wind will be 15-19 kts with gusts to 28 kts thru 16/04Z and again aft 16/18Z. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Deeper moisture remains across southeast Arizona, with typical mid July moisture levels expected through at least the upcoming weekend. This will result in the daily cycle of mainly afternoon and evening showers and thunderstorms. The main threats will be strong, gusty and erratic outflow winds and heavy rainfall leading to localized flash flooding. Minimum relative humidity values will be 20-30 percent in most lower elevation locations and 25-40 percent in mountain areas. Away from thunderstorms, 20-foot winds will generally be 15 mph or less, with afternoon/early evening gusts to 20-25 mph and light winds overnight. Wind direction will primarily be southwest through northwest through most of the week. The exception will be in the upper Gila River valley around Safford, where afternoon/early evening winds will be west-northwest at 15-20 mph and gusts to 25-30 mph through Tuesday. && .TWC WATCHES/WARNINGS/ADVISORIES... None. && Zell Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The Tucson radar (KEMX), 62 km away, was scanning. The volume nearest the first event began at 00:00 UTC.
2 thunderstorm wind, 1 flash flood. Local standard time, as filed.
Extensive flooding in area washes occurred just southeast of Sierra Vista as rainfall amounts of at least 2 to 3 inches occurred. Monson Road closed due to flooding.
The ASOS at Fort Huachuca recorded a wind gust of 58 mph.
The Safford Regional ASOS recorded a wind gust of 59 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, July 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 2026-09-30. Each event’s entry at NCEI: 1182713, 1182437, 1182436.