A thunderstorm caused heavy rain and street flooding in Winslow.
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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 FGZ wrote it up.
A thunderstorm caused heavy rain and street flooding in Winslow.
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 Sep 3, 3:52 PM MST, 2 hours 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 352 PM MST THU SEP 3 2015 .SYNOPSIS...SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER THE NEXT SEVERAL DAYS...WITH THE BEST CHANCES OF STORMS OVER THE EASTERN HALF OF THE STATE. DRIER CONDITIONS MAY RETURN TO NORTHERN ARIZONA EARLY NEXT WEEK. && .DISCUSSION...SO FAR TODAY, SHOWER AND THUNDERSTORM ACTIVITY HAS GENERALLY BEEN CONFINED TO PORTIONS OF NORTHERN GILA, AND SOUTHERN NAVAJO AND APACHE COUNTIES. THE PRIMARY HAZARD FROM THESE STORMS HAS BEEN LOCALIZED FLOODING FROM HEAVY RAINFALL. FOR THE REST OF TODAY AND TONIGHT...SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED TO CONTINUE PRIMARILY ALONG AND TO THE NORTH OF THE EASTERN MOGOLLON RIM AND WHITE MOUNTAINS THIS AFTERNOON. HI-RES MODEL GUIDANCE STILL INDICATES THAT OUTFLOWS FROM CONVECTIVE ACTIVITY OVER SOUTHERN ARIZONA MAY TRIGGER NEW SHOWERS AND THUNDERSTORMS ALONG AND SOUTH OF THE MOGOLLON RIM FROM FLAGSTAFF EASTWARD - ALTHOUGH THE HRRR HAS BACKED OFF ON THIS PREDICTION OVER THE LAST COUPLE OF RUNS. ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS IS EXPECTED ON FRIDAY, WITH THE GREATEST ACTIVITY ROUGHLY EAST OF LINE FROM PRESCOTT-FLAGSTAFF-PAGE. LOCALIZED FLOODING FROM HEAVY RAINFALL WILL CONTINUE TO BE THE PRIMARY HAZARD, BUT INCREASING DEEP LAYER SHEAR MEANS LARGE HAIL CANNOT BE RULED OUT. SATURDAY ONWARD...AS WE ENTER THE WEEKEND...FLOW WILL TURN WEST- SOUTHWESTERLY AS LOW PRESSURE SHIFTS ACROSS THE GREAT BASIN. THIS SHOULD LEAD TO A DOWNTURN IN ACTIVITY FROM LATE SATURDAY INTO EARLY NEXT WEEK. ECMWF KEEPS MOISTURE MUCH MORE LIMITED THROUGH THE EXTENDED FORECAST WHILE THE GFS IS MORE FAVORABLE TO RETURNING STORM CHANCES NEXT WEEK. WILL CONTINUE TO OBSERVE MODEL FORECAST TRENDS OVER THE COMING DAYS. && .AVIATION...FOR THE 00Z PACKAGE...SCATTERED STORMS WILL CONTINUE THIS EVENING ACROSS NAVAJO, APACHE, AND GILA COUNTIES. ANOTHER ROUND OF SCATTERED SHRA/TSRA WILL DEVELOP AFT 18Z FRIDAY PRIMARILY ALONG AND EAST OF A PRESCOTT-FLAGSTAFF-PAGE LINE. ISOLATED STORMS POSSIBLE ELSEWHERE. LOCALIZED IFR CONDITIONS POSSIBLE IN MOD/HVY RAIN ALONG WITH GUSTY STORM OUTFLOWS TO 30 KTS. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC...RR AVIATION...CLM FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 651 AM MST THU SEP 3 2015 AZZ004>018-037>040-040645- 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- 651 AM MST THU SEP 3 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO... NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS ARE FORECAST TO BE MOST FOCUSED OVER THE EASTERN HALF OF THE STATE TODAY...WITH LOWER STORM CHANCES CONTINUING ELSEWHERE. PRIMARY THREATS WILL BE LOCALLY HEAVY RAIN...GUSTY THUNDERSTORM WINDS...LIGHTNING AND ISOLATED HAIL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY DAILY CHANCES FOR SHOWERS AND STORMS WILL PERSIST. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Heavy rain from thunderstorms caused water to flow over street curbs and into some yards in Winslow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2015Every state in 2015This day in weather historyWarnings in Arizona, September 2015
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: 601502.