The extreme (D3) drought expanded in the northern sections of Southeastern Arizona, including southeastern Pinal County. The overall precipitation for Arizona ranking was 16th driest for the month of August.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
The extreme (D3) drought expanded in the northern sections of Southeastern Arizona, including southeastern Pinal County. The overall precipitation for Arizona ranking was 16th driest for the month of August. Soil moisture readings decreased to between the 5th percentile to 10th percentile ranking for the area.
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 19, 2:30 AM MST, 5 hours 30 minutes earlier.
Area Forecast Discussion National Weather Service Tucson AZ 230 AM MST Tue Aug 19 2025 .SYNOPSIS...Isolated to scattered thunderstorms this week across Southeast Arizona, with day to day variability in intensity and chances. The big story for Southeast Arizona will be the extreme heat returning the second half of the week. An Extreme Heat Warning is in effect Wednesday morning through Friday evening. && .DISCUSSION...At this writing, very light showers are passing through the Graham County and southwestern portion of Cochise County. Very light accumulations were observed at the rain gauges, generally 0.05 to 0.1 inches. Showers will pass northwest and dissipate by 4AM. A high pressure center is hovering around the Four Corners which will bring two forecast points for the rest of the week: chances for thunderstorms and heat. The influx of moisture has already arrived over the region. This will provide chances for thunderstorms and rain showers each day. The high center will push the moisture around...from the southeasterly to easterly...the area. This will be the constant theme of variability of coverage and intensity through the week. Today's highest chances will be Tucson and east as the PWATS will be around the 75th percentile per the 00Z HREF. The White Mountains has one of best chances for storms and a 50% gust potential for 30 kts or more, whereas the other locations have at least a 10% chance for 30 kt gusts. Tomorrow, the chances will expand as far west as Why, AZ. High pressure brings one of the good 'old Arizona summer classics...heat. Temperatures will continue to trend warmer each day and staying above normal through majority of the work week. Our overnight lows will also be elevated and near daily low highs records, resulting in Major HeatRisk in the lower elevations. There is an Extreme Heat Warning starting on Wednesday through Friday. Looking beyond this week, the upper pattern is poised to bring a change in the flow. The ensemble models are showing a troughing in the Pacific Ocean and the high breaking down a bit, resulting in southerly flow. That leads to tapping into moisture sources from the south which brings high chances for rain showers and thunderstorms. That being said, it is over a week out and it depends on how close the troughing and the high position is by the weekend. This scenario will also bring temperatures down to near normal. Otherwise, stay cool this week. && .AVIATION...Valid through 20/12Z. SCT-BKN clouds 10-14k AGL ft through the forecast period. Isolated light -SHRA this morning near KSAD and along the International Border until 19/11Z. Increased chances for scattered -SHRA/-TSRA after 19/18Z for terminals from KTUS east. Light and terrain driven winds through the forecast period with afternoon gusts up to 20kt. Gusts up to 40kts are possible with any -TSRA. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Expect daily chances for thunderstorms and wetting rain showers into next week. Min RHs will generally be 15-20 percent in the lower elevations and 20-30 in the mountains. Winds will generally be less than 15 mph with typical afternoon gusts up to 20 mph into next week. Temperatures will be above normal this week, with an Extreme Heat Warning in the lower elevations of Southeast Arizona Wednesday through Friday. && .TWC WATCHES/WARNINGS/ADVISORIES... Extreme Heat Warning from 10 AM Wednesday to 8 PM MST Friday for AZZ501>507-509. && Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The national radar mosaic for the moment the first event began.
1 drought. Local standard time, as filed.
For the month of August, Pinal county ranked the 20th driest for the period of record. Soil moisture readings decreased to range between the 5th through 10th percentile for the month of August.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2025Every state in 2025This day in weather historyWarnings in Arizona, August 2025
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: 1288486.