An anomalous early push of tropical moisture from the remnants of Tropical Storm Alvin brought strong thunderstorms and heavy rainfall to Southeast Arizona. Notably, there was damage to electrical equipment in Douglas, AZ causing a power outage to 1,400 people.
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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.
An anomalous early push of tropical moisture from the remnants of Tropical Storm Alvin brought strong thunderstorms and heavy rainfall to Southeast Arizona. Notably, there was damage to electrical equipment in Douglas, AZ causing a power outage to 1,400 people.
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 1, 3:16 PM MST, 2 hours 44 minutes earlier.
Area Forecast Discussion National Weather Service Tucson AZ 316 PM MST Sun Jun 1 2025 .SYNOPSIS...A weather system moving across the area through Monday will bring widespread showers and isolated thunderstorms tonight into Monday morning. Another chance of showers on Tuesday with dry conditions returning to the area on Wednesday. High temperatures will be below normal to start the work week then warm to above normal by the end of the work week. && .DISCUSSION...Widely scattered showers/isolated thunderstorm so far today as the upper low off northern Baja was slow to eject. Over the past couple of hours, the low has started to eject per last water vapor imagery. Dynamics from this system will act on tropical moisture that has advected across the area in the past 12 hours. The 18z Tucson sounding has PW of 1.22" while SPC analysis showing up to 1.70" moving Yuma county and wrn Pima county. With the PW values forecast to be 250%-325% of normal and the dynamics coming in, still looking at widespread showers and isolated thunderstorm with a few heavy rainers and training storms into tonight from Tucson west. Flash Flood Watch remains in effect across SE Pinal, Pima and Santa Cruz counties. Latest HRRR runs keep activity going past midnight for Tucson east. Overnight showers will continue, but rain amounts will be on the lighter side as the upper low weakens and moves northeastward towards the Four Corners. During this time PWAT values also begin to decrease, although they will still be above normal for this time of year. As synoptic scale forcing decreases shower activity will decrease from west to east Monday with additional rainfall amounts up to 0.25". High temperatures today and Monday will be moderated by the moisture and cloud cover with Tucson possibly seeing sub 90 degree highs both days. Monday: Remaining unsettled as the low opens up while moving across the state. Up to 30% chance of showers/isolated t-storms with highs below normal. Tuesday: Follow-up weather system will keep conditions unsettled especially north of Tucson for a slight chance of showers. Wednesday thru Friday: Significant drying takes place with high temperatures warming up to several degrees above normal by Friday. Next week: Dry and hot and subtropical high strengthens over NW Mexico. && .AVIATION...Valid through 03/00Z. SCT -SHRA and ISOLD -TSRA thru much of valid pd. Brief MVFR cigs with +SHRA thru 12/09z. SWLY/SLY winds 8-15 kts thru much of valid pd. Isold gusts to 30-40 kts near any TS that develop. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Widespread showers and isolated thunderstorms will continue across the area into tomorrow morning before decreasing from west to east on Monday. Rain could be heavy at times leading to possible debris flows over new area burn scars. Overall winds remain light but gusty and erratic winds would occur with any thunderstorm activity. Another weather system moves through Tuesday with a slight chance for precip north of Tucson along with breezy winds. Thereafter expect dry and warming conditions. && .TWC WATCHES/WARNINGS/ADVISORIES... Flood Watch until 5 PM MST this afternoon for AZZ501-502-515. Flood Watch until 11 PM MST this evening for AZZ503>507-513-514. && Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
Special Weather Statement
National Weather Service Tucson AZ
237 PM MST Sun Jun 1 2025
AZZ507-513-012200-
Dragoon and Mule and Huachuca and Santa Rita Mountains AZ-Upper
San Pedro River Valley AZ-
237 PM MST Sun Jun 1 2025
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN COCHISE COUNTY
UNTIL 3 PM MST...
At 237 PM MST, Doppler radar was tracking a strong thunderstorm near
Hereford, moving northwest at 20 mph.
HAZARD...Wind gusts up to 50 mph and half inch size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is possible.
Locations impacted include...
Sierra Vista, Hereford, Fort Huachuca, Palominas, Coronado
National Memorial and Ramsey Canyon Preserve.
This includes the following highways...
Route 90 between mile markers 329 and 330.
Route 92 between mile markers 326 and 346.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 3133 11024 3146 11034 3156 11012 3136 11001
3133 11006
TIME...MOT...LOC 2136Z 151DEG 15KT 3136 11013
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
CWRThe Tucson radar (KEMX), 24 km away, was scanning. The volume nearest the first event began at 01:00 UTC.
2 thunderstorm wind, 1 lightning. Local standard time, as filed.
Sulphur Springs Valley Electric Company reported outages for roughly 1,400 people in Sonoita, Whetstone, Benson, and Wilcox due to multiple thunderstorm hazards including lightning, fallen branches, and heavy rain that arched power lines.
Sulphur Springs Valley Electric Company reported outages for roughly 1,400 people in Whetstone, Benson, and Wilcox due to multiple thunderstorm hazards including lightning, fallen branches, and heavy rain that arched power lines.
APS reported a power outage was around 10 pm at the intersection of Richie Rd and Rochin Rd due to strong thunderstorm winds causing broken wires. Time estimated by radar.
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, June 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: 1274398, 1274400, 1274399.