Numerous strong to severe thunderstorms formed primarily in Santa Cruz and Cochise Counties during the afternoon of June 30. A couple of locations such as St.
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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.
Numerous strong to severe thunderstorms formed primarily in Santa Cruz and Cochise Counties during the afternoon of June 30. A couple of locations such as St. David and Patagonia experienced severe criteria 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 Jun 30, 1:21 PM MST, 2 hours 9 minutes earlier.
Area Forecast Discussion National Weather Service Tucson AZ 121 PM MST Sun Jun 30 2024 .SYNOPSIS...Active monsoon pattern for the next 7 days will bring daily chance of showers and thunderstorms. Some storms will generate strong winds and locally heavy rainfall. && .DISCUSSION...Latest visible satellite imagery this afternoon is showing an MCV near Rocky Point with generally partly to mostly cloudy skies across much of southeast Arizona. The clouds held on a bit more than expected through the midday hours so that has certainly slowed the warming and destabilization process. Where skies have cleared out for sufficient time, we're seeing thunderstorms from in the last hour across portions of Graham/Greenlee/Cochise Counties. Another mid level disturbance is quickly approaching from the east-southeast and that will help aid in deeper layer lift this afternoon into the evening hours. MLCAPE values will increase to around 1000-1500 J/KG as CIN diminishes over the next hour or two. This will be enough to result in convective development and the latest HRRR and UofA WRF model runs are in agreement on this. Given the anomalously high moisture levels, flash flooding will be a concern along with strong and gusty outflow winds as DCAPE values range from about 800-1200 J/KG across our forecast area. These gusty outflow winds may produce a large area of blowing dust to the NW of Tucson. A Blowing Dust Advisory is in place for this and any short fuse intense dust storms will be covered with Dust Storm Warnings if needed. Convective activity may persist well into the evening hours, especially from Tucson westward. Abundant moisture remains in place for Monday, though just how much activity we see will partially be dependent on what takes place today/tonight. The flow does become a bit more southwesterly on Monday. The moisture will remain with us through about Wednesday with PWAT values ranging from about 1.4 inches to 1.7 inches across the forecast area to keep the active period ongoing. Thereafter, the ensembles are showing the mid/upper high reconsolidating to our north/northwest. This will change the flow to become more northeasterly. However, some drier air will also start filtering in from the north and keep the best chances for daily showers and thunderstorms from Tucson south and eastward. && .AVIATION...Valid through 02/00Z. SCT-BKN clouds at 8-12k ft AGL thru the fcst period. Scattered- numerous SHRA/TSRA 30/20Z-01-04Z, then becoming isolated -SHRA/-TSRA overnight. Another round of SCT -SHRA/-TSRA aft 01/18Z thru the end of the fcst period. Expect brief MVFR conds nr storms. SFC winds 10 kts or less with the occasional afternoon gusts, except stronger due to gusty outflows from storms. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Relatively deep moisture will stick around through the forecast period. Scattered ton numerous showers and thunderstorms this afternoon and tonight. The upcoming week will see daily chances of afternoon and evening showers and thunderstorms. Strong and erratic gusty winds of 40 mph or higher can be expected with any storm development, along with locally brief heavy rainfall. Outside of thunderstorm winds, 20-foot winds will generally be 15 mph or less each afternoon with the occasional gust of 20 mph. Min RHs will generally be around 20% in the valleys and 30s in the mountains with good overnight recoveries. && .TWC WATCHES/WARNINGS/ADVISORIES... Blowing Dust Advisory from 3 PM this afternoon to 10 PM MST this evening for AZZ502-504>506. Flood Watch from this afternoon through this evening for AZZ502>507-513>515. && Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The Tucson radar (KEMX), 45 km away, was scanning. The volume nearest the first event began at 22:28 UTC.
2 thunderstorm wind. Local standard time, as filed.
CWOP weather station CW4232 recorded a wind gust of 60 mph.
A wind gust of 58 mph was recorded near Saint David.
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, June 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: 1179217, 1179218.