The monsoonal high was positioned of the Central Plains allowing tropical moisture to advance northward into southeast Arizona from the remnants of tropical storm Ivo. Afternoon thunderstorms dropped heavy amounts of rain around the region, causing flash flooding of some roadways.
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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.
The monsoonal high was positioned of the Central Plains allowing tropical moisture to advance northward into southeast Arizona from the remnants of tropical storm Ivo. Afternoon thunderstorms dropped heavy amounts of rain around the region, causing flash flooding of some roadways.
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 25, 2:52 PM MST, 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 252 PM MST SUN AUG 25 2013 .SYNOPSIS...DEEP MOISTURE OVER THE AREA WILL RESULT IN WIDESPREAD RAINFALL THROUGH TONIGHT. LOCALLY HEAVY RAINFALL WILL BE POSSIBLE. OTHERWISE...LINGERING MOISTURE COMBINED WITH A SERIES OF IMPULSES WILL LEAD TO A GOOD CHANCE OF THUNDERSTORMS FOR MUCH OF THE COMING WEEK. && .DISCUSSION...SCATTERED SHOWERS AND THUNDERSTORMS WERE ON THE INCREASE AREAWIDE THIS AFTERNOON. CLOUD COVER AND LIGHT SHOWERS HAD HINDERED THE DEVELOPMENT OF HEAVY RAINFALL SO FAR ACROSS CENTRAL AND WESTERN PIMA COUNTIES WHERE A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 5 PM MST. HOWEVER...WILL NOT CANCEL THE WATCH YET SINCE RADAR WAS SHOWING A FEW THUNDERSTORMS DEVELOPING EAST THROUGH SOUTHEAST OF SELLS EARLY THIS AFTERNOON. THE DECAYING TROPICAL SYSTEM RESPONSIBLE FOR THIS INCREASE IN DEEP MOISTURE WILL LIKELY BE ABSORBED NORTHWARD INTO THE UPPER FLOW WEST OF OUR AREA BY LATE MONDAY. THIS WILL RESULT IN A NOTICEABLE DECREASE IN RAIN CHANCES. THEREAFTER...THE FLOW ALOFT WILL REMAIN FAVORABLE FOR AN ACTIVE THUNDERSTORM PATTERN AS THE UPPER HIGH REMAINS CENTERED OVER THE CENTRAL UNITED STATES. && .AVIATION...SCT SHRA/ISOLD TSRA CONTINUING THROUGH THE EVENING. TSRA WITH IFR CIGS/VSBYS AND MTN OBSCD IN RA+. SFC WINDS MAINLY 8-15 KTS WITH STRONGER THUNDERSTORM OUTFLOWS POSSIBLE. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...MOIST SOUTHEAST FLOW WILL FAVOR DECENT COVERAGE OF SHOWERS AND THUNDERSTORMS ACROSS SE AZ THIS WEEK. && .TWC WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH AZZ501>502 THROUGH 5PM MST TODAY. && VISIT US ON FACEBOOK...TWITTER...YOUTUBE...AND AT WEATHER.GOV/TUCSON
The Tucson radar (KEMX), 10 km away, was scanning. The volume nearest the first event began at 22:28 UTC.
1 flash flood. Local standard time, as filed.
A wash running through Vail flooded near the intersection of Calle Rinconado and Andrada Road. Water flowing across the road was over one foot deep.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2013Every state in 2013This day in weather historyWarnings in Arizona, August 2013
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: 475537.