Thunderstorms produced flash flooding in Moenkopi Wash near Tuba City.
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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.
Thunderstorms produced flash flooding in Moenkopi Wash near Tuba City.
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 13, 8:40 PM MST, 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 840 PM MST THU AUG 13 2015 .SYNOPSIS...A DECREASE IN MONSOON THUNDERSTORM ACTIVITY IS EXPECTED OVER THE NEXT SEVERAL DAYS AS HIGH PRESSURE GRADUALLY BUILDS OVER ARIZONA. TEMPERATURES WILL BE SEVERAL DEGREES ABOVE NORMAL THROUGH EARLY NEXT WEEK...WITH VERY HOT AFTERNOONS AT THE LOWER ELEVATIONS. && .UPDATE...A DRIER AND MORE STABLE AIR MASS MOVED INTO CENTRAL AND EASTERN ARIZONA TODAY WITH LITTLE OR NO STORM ACTIVITY. WIDELY SCATTERED STORMS AFFECTED COCONINO COUNTY DURING THE AFTERNOON BUT THIS ACTIVITY HAS MOSTLY DISSIPATED THIS EVENING...AND IS MOST LIKELY DONE FOR THE NIGHT. AS THE RIDGE OVER NEW MEXICO HEADS SLOWLY EAST TOWARD ARIZONA OVER THE NEXT FEW DAYS...WE ARE EXPECTING SOME VERY WARM TEMPERATURES. IN FACT...HIGH TEMPERATURES TODAY WERE CLOSE TO EXCESSIVE HEAT WARNING CRITERIA FOR THE LOWER ELEVATIONS OF YAVAPAI COUNTY. MODELS ARE FORECASTING SOME MID LEVEL CLOUD COVER THAT COULD KEEP TEMPS JUST BELOW CRITERIA FRIDAY...BUT SATURDAY AND SUNDAY WILL NEED TO BE MONITORED FOR A POSSIBLE EXCESSIVE HEAT WARNING. && .PREV DISCUSSION /230 PM MST/...AS WE HEAD INTO THE WEEKEND...THE DOWNTURN IN ACTIVITY WILL CONTINUE WITH ISOLATED HERE AND THERE SHOWERS AND STORMS EACH DAY. VERY WARM IN THE MOUNTAINS AND EXTREMELY HOT IN THE LOWER DESERTS OF CENTRAL ARIZONA. MAKE SURE TO ACCOUNT FOR THIS IN ANY OF YOUR PLANS. && .AVIATION...FOR THE 06Z PACKAGE...VFR CONDITIONS THROUGH 18Z FRI...THEN A REDEVELOPMENT OF ISOLD TO SCT SHRA/TSRA THROUGH AROUND 03Z WITH MVFR/IFR CONDS IN THE STRONGER STORMS. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC...JJ/MCCOLLUM AVIATION...JJ FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 824 AM MST THU AUG 13 2015 AZZ004>018-037>040-140100- 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- 824 AM MST THU AUG 13 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO... NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY AND TONIGHT HIGH PRESSURE AND A MORE STABLE AIR MASS WILL GRADUALLY MOVE OVER ARIZONA. ENOUGH MOISTURE AND INSTABILITY WILL REMAIN FOR SCATTERED AFTERNOON THUNDERSTORMS FROM ABOUT PRESCOTT AND FLAGSTAFF NORTHWEST. LOOK FOR A SLIGHT CHANCE ESLEWHERE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE THREAT OF ISOLATED AFTERNOON THUNDERSTORMS IS EXPECTED TO CONTINUE. IF YOU ARE PLANNING OUTDOOR ACTIVITIES OVER THE NEXT WEEK CHECK BACK AT WEATHER.GOV/FLAGSTAFF FOR DAY TO DAY DETAILS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Flagstaff radar (KFSX), 176 km away, was scanning. The volume nearest the first event began at 04:01 UTC.
1 flash flood. Local standard time, as filed.
The river gauge on the Moenkopi Wash near Tuba City jumped from near zero to 6,900 CFS in under 30 minutes. NWS personnel confirmed that the water was encouraging homes in the community of Moenkopi.
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, August 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: 600725.