Thunderstorms over eastern Arizona brought flash flooding.
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.
Thunderstorms over eastern Arizona brought flash flooding.
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 1, 3:49 PM MST, 2 hours 1 minute earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 349 PM MST SAT AUG 1 2015 .SYNOPSIS...DEEP MOISTURE WILL REMAIN IN PLACE ACROSS MUCH OF NORTHERN ARIZONA THROUGH SUNDAY WITH SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. THERE WILL BE A SLIGHT DECREASE IN ACTIVITY ON SUNDAY AS DRIER AIR BEGINS TO MOVE IN FROM THE WEST. MORE DRY AIR WILL SPREAD EAST ACROSS NORTHERN ARIZONA THROUGH WEDNESDAY. MOISTURE WILL INCREASE FROM THE SOUTH AGAIN THURSDAY AND FRIDAY. && .DISCUSSION...IT WAS A RATHER ACTIVE DAY ACROSS NORTHERN ARIZONA TODAY. STORMS WILL CONTINUE INTO THIS EVENING THEN DECREASE OVERNIGHT. DEEP MOISTURE WILL REMAIN OVER MOST OF NORTHERN ARIZONA ON SUNDAY WITH SCATTERED SHOWERS AND THUNDERSTORMS. A DRIER SOUTHWEST FLOW WILL DEVELOP OVER FAR WESTERN ARIZONA BY SUNDAY AFTERNOON. THIS WILL BRING A SLIGHT DECREASE IN STORMS ACROSS WESTERN YAVAPAI AND WESTERN COCONINO COUNTIES. A SOLID SOUTHWEST FLOW DEVELOPS ON MONDAY WITH DRIER AIR PUSHING ACROSS THE STATE. THIS WILL BRING A DECREASE IN THUNDERSTORM ACTIVITY MONDAY THROUGH WEDNESDAY FOR ALL EXCEPT THE WHITE MOUNTAINS WHICH WILL CONTINUE TO SEE A CHANCE FOR STORMS. MOISTURE LOOKS TO MAKE A RETURN BY THURSDAY OF NEXT WEEK WHEN STORM CHANCES WILL INCREASE ONCE AGAIN ACROSS NORTHERN ARIZONA. && .AVIATION...FOR THE 00Z PACKAGE...SCT -SHRA/TSRA WILL CONTINUE THROUGH 03Z THEN DECREASE. MVFR/IFR CONDITIONS WILL BE POSSIBLE WITH THE STRONGER STORMS. SCT -SHRA/TSRA WILL DEVELOP AGAIN AFTER 17Z SUNDAY. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FIRE WEATHER...AN ACTIVE MONSOON PATTERN WILL CONTINUE ACROSS NORTHERN ARIZONA THIS WEEKEND. EXPECT SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. DRIER AIR WILL START TO MOVE INTO WESTERN ARIZONA STARTING SUNDAY. .TUESDAY THROUGH THURSDAY...A DRIER SOUTHWEST FLOW WILL CONTINUE TO MOVE OVER NORTHERN ARIZONA WITH DECREASING MONSOON MOISTURE AND CHANCES OF SHOWERS AND THUNDERSTORMS. FEWER STORMS ARE EXPECTED EACH DAY THROUGH WEDNESDAY. MOISTURE WILL BEGIN TO MOVE NORTHWARD AGAIN ON THURSDAY WITH INCREASING STORM ACTIVITY. WE WILL BE DISCONTINUING THE FIRE WEATHER SECTION OF OUR FORECAST DISCUSSION UNTIL NEXT YEAR. PLEASE SEE OUR FIRE WEATHER ZONE FORECAST PRODUCT (FWFFGZ) FOR FUTURE FIRE WEATHER DISCUSSIONS. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC...MAS AVIATION...MAS FIRE WEATHER...MAS FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1152 AM MST SAT AUG 1 2015 AZZ013-011915- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- 1152 AM MST SAT AUG 1 2015 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL NAVAJO COUNTY UNTIL 1215 PM MST... AT 1151 AM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR SNOWFLAKE...OR 20 MILES NORTH OF SHOW LOW...MOVING NORTH AT 10 MPH. DIME SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... SNOWFLAKE. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 3446 11004 3451 11014 3469 11012 3462 10989 TIME...MOT...LOC 1851Z 200DEG 9KT 3453 11006
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1156 AM MST SAT AUG 1 2015 AZZ012-013-011930- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- 1156 AM MST SAT AUG 1 2015 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN COCONINO AND SOUTHWESTERN NAVAJO COUNTIES UNTIL 1230 PM MST... AT 1154 AM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8 MILES SOUTHEAST OF METEOR CRATER...OR 11 MILES WEST-SOUTHWEST OF WINSLOW...MOVING NORTH AT 20 MPH. DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... INTERSTATE 40 BETWEEN MILE POST 240 AND 250. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 3488 11086 3493 11101 3515 11095 3508 11071 TIME...MOT...LOC 1854Z 202DEG 15KT 3497 11090 JJ
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 206 PM MST SAT AUG 1 2015 AZZ010-011-012145- CHINLE VALLEY-CHUSKA MOUNTAINS AND DEFIANCE PLATEAU- 206 PM MST SAT AUG 1 2015 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL APACHE COUNTY UNTIL 245 PM MST... AT 206 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR NAZLINI...OR 13 MILES SOUTHEAST OF CHINLE...MOVING NORTH AT 10 MPH. DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF CENTRAL APACHE COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 3590 10946 3594 10957 3611 10957 3605 10932 TIME...MOT...LOC 2106Z 197DEG 8KT 3598 10949
The Phoenix radar (KIWA), 79 km away, was scanning. The volume nearest the first event began at 00:52 UTC.
2 flash flood. Local standard time, as filed.
The Gila County Sheriffs Office reported that a flash flood washed out a Forest Service road near SR 288. A rescue operation was preformed after a SUV became stuck.
The Nazlini Wash flooded low water crossings.
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: 599024, 599025.