Strong thunderstorms hit central Arizona with strong winds and heavy rain.
Every event with a place to put it. 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 FGZ wrote it up.
Strong thunderstorms hit central Arizona with strong winds and heavy rain.
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 Flagstaff, AZ wrote its last area forecast discussion before the first event at Aug 29, 3:25 PM MST, 2 hours 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 325 PM MST THU AUG 29 2013 .SYNOPSIS...DEEP MONSOON MOISTURE WILL REMAIN ANCHORED OVER ARIZONA THROUGH SUNDAY. A TROUGH MOVING ACROSS THE SOUTHWEST WILL BRING VERY HIGH MOISTURE LEVELS INTO ARIZONA AND PRODUCE SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. FROM LABOR DAY THROUGH MUCH OF NEXT WEEK...A RETURN TO MORE TYPICAL MONSOON ACTIVITY IS EXPECTED. && .DISCUSSION...AN INVERTED TROUGH AXIS IS EVIDENT ON SATELLITE THIS AFTERNOON...STRETCHING FROM THE NORTHERN GULF OF CALIFORNIA... THROUGH EAST CENTRAL AZ AND INTO NEW MEXICO. MOISTURE VALUES HAVE CREPT UP EVEN MORE THAN WHAT THEY WERE THIS MORNING...OVER ONE INCH ON THE MOGOLLON RIM AND CLOSE TO 2 INCHES IN FAR SW YAVAPAI COUNTY. SCATTERED THUNDERSTORMS HAVE DEVELOPED FROM THE FLAGSTAFF AREA WESTWARD...AND THIS IS WHERE THE BEST CHANCE OF SOME LOCALIZED FLASH FLOODING WILL BE FOR THE NEXT FEW HOURS...INCLUDING YAVAPAI AND WESTERN COCONINO. STORM DEVELOPING IN WESTERN NEW MEXICO AND APACHE COUNTY AZ ARE ALSO PUSHING WESTWARD...AND MAY BRING ANOTHER ROUND OF SHOWERS AND STORMS TO THE WINSLOW AND FLAGSTAFF AREAS BY MID EVENING. FOR FRIDAY AND SATURDAY...THE TROUGH LIFTS SLOWLY NORTHWARD ACROSS THE REGION WITH HIGH PRECIPITABLE WATER VALUES PERSISTING. SHOWERS AND THUNDERSTORMS ARE LIKELY...SOME WITH VERY HEAVY RAIN AND LOCALIZED FLOODING IS POSSIBLE. BY SUNDAY...SOME DRIER AIR IS FORECAST TO WORK INTO THE SOUTHEAST PART OF THE FORECAST AREA...INCLUDING THE WHITE MTNS AND GILA COUNTY. WE DECREASED RAIN CHANCES SOMEWHAT IN THIS AREA...BUT LATER SHIFTS MAY NEED TO ADJUST DOWNWARD EVEN MORE. THE HIGHEST CHANCE OF STORMS WILL SHIFT TO THE AREA FROM AROUND FLAGSTAFF NORTHWARD. MONDAY THROUGH WEDNESDAY...STRONG HIGH PRESSURE IS FORECAST TO DEVELOP OVER THE SOUTHERN ROCKIES...WITH A SOUTHEASTERLY FLOW OVER AZ. THE EXTREME MOISTURE LEVELS WE HAVE TODAY WILL GRADUALLY DECREASE BRINGING US BACK TO A MORE NORMAL MONSOON PRECIPITATION PATTERN BY WEDNESDAY. EXPECT A CHANCE FOR SHOWERS AND THUNDERSTORMS THROUGH THE FIRST HALF OF NEXT WEEK. && .AVIATION..FOR THE 00Z PACKAGE...SCATTERED SHRA/TSRA WILL CONTINUE THIS EVENING THROUGH 04Z...WITH MVFR/ISOLATED IFR IN THE HEAVIER SHOWERS. EXPECT ISOLATED -SHRA/TSRA CONTINUING OVERNIGHT. STORMS WILL REDEVELOP AFT 18Z FRIDAY...MOST NUMEROUS SOUTH AND WEST OF A LINE FROM KPGA TO KSOW. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC.....JJ AVIATION...BK FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1045 AM MST THU AUG 29 2013 AZZ004>018-037>040-300600- KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY- COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS- NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-CHINLE VALLEY- CHUSKA MOUNTAINS AND DEFIANCE PLATEAU- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- WESTERN MOGOLLON RIM-EASTERN MOGOLLON RIM-WHITE MOUNTAINS- NORTHERN GILA COUNTY-YAVAPAI COUNTY VALLEYS AND BASINS- OAK CREEK AND SYCAMORE CANYONS-BLACK MESA AREA- NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264- 1045 AM MST THU AUG 29 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO... NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY AND TONIGHT SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED. THE MAIN THREATS WILL BE FROM LOCALIZED FLASH FLOODING AND ISOLATED SEVERE THUNDERSTORMS WHICH MAY PRODUCE LARGE HAIL. A FLASH FLOOD WATCH IS IN EFFECT FOR YAVAPAI COUNTY UNTIL 11 PM MST. SCATTERED THUNDERSTORM AND SHOWER ACTIVITY WILL CONTINUE THROUGH THE OVERNIGHT HOURS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY FRIDAY THROUGH SUNDAY...A TROUGH WILL MOVE ACROSS ARIZONA INCREASING COVERAGE FOR RAIN SHOWERS AND THUNDERSTORMS FROM SOUTH TO NORTH. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP...AND MAY CONTINUE THROUGH THE OVERNIGHT HOURS THIS WEEKEND. THE MAIN THREAT WILL BE FROM HEAVY RAIN AND LOCALIZED FLASH FLOODING. MONDAY AND TUESDAY...GOOD CHANCES FOR SHOWERS AND THUNDERSTORMS ARE FORECAST. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Flagstaff radar (KFSX), 28 km away, was scanning. The volume nearest the first event began at 00:29 UTC.
6 heavy rain, 3 flash flood, 1 thunderstorm wind. Local standard time, as filed.
A trained spotter in Tonto Village reported 1.30 inches of rain. Forest Road 64 into Tonto Village remained open.
Numerous trees up to 14 inches in diameter were knocked down by thunderstorm winds.
A spotter in Star Valley reported 0.97.
Severe flooding was reported in Round Valley. One vehicle was stuck in a flooded wash and one of the roads into Middle Round Valley was impassable.
A spotter measured 2.20 inches of rain overnight. Other locations in and around Sedona measured 1.85 inches.
Constellation Road north of Wcikenburg was washed out.
Heavy rain (estimated 3 inches) caused large rocks and debris to fall on Highway 89 about 8 miles west of Jerome.
State Highway 260 was temporarily closed because there was too much water on the roadway.
Crown King Road was damaged by water over topping the road between mile posts 15 and 19 near Mulddoon Gulch. Dual Pole Radar estimated around 2.50 inches of rain had fallen in that area. This area was impacted by the Gladiator Fire in 2012.
Interstate 17 was closed 3 miles north of Black Canyon City after heavy rain knocked rocks and debris on the roadway.
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: 474822, 474820, 474821, 474799, 474818, 474801, 474828, 474832, 474834, 474835.