A thunderstorm produced strong winds that blew down a brick wall.
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.
A thunderstorm produced strong winds that blew down a brick wall.
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 7, 2:28 PM MST, 1 hour 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 228 PM MST FRI AUG 7 2015 .SYNOPSIS...DEEP MOISTURE AND AN APPROACHING PACIFIC TROUGH WILL PRODUCE SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS NORTHERN ARIZONA TODAY. THERE IS AN ELEVATED RISK FOR FLASH FLOODING IN NORTHWESTERN ARIZONA THAT INCLUDES MUCH OF COCONINO COUNTY. STORM ACTIVITY WILL THEN DECREASE IN COVERAGE ON SATURDAY AND SUNDAY. DEEPER MOISTURE WILL RETURN NEXT WEEK RAMPING UP STORM ACTIVITY FROM MONDAY ONWARD. && .DISCUSSION...UPPER LEVEL LOW PRESSURE CENTERED NEAR LAKE TAHOE THIS AFTERNOON IS PROVIDING SOME DYNAMIC LIFT TO HELP FUEL AFTERNOON THUNDERSTORMS ACROSS NORTHWESTERN ARIZONA. FURTHER EAST...DAYTIME INSTABILITY FROM AMPLE MONSOON MOISTURE HAS RESULTED IN ADDITIONAL THUNDERSTORM ACTIVITY STRETCHING FROM WHITERIVER ALL WAY NORTH TOWARD KAYENTA. THE TROUGH IS PROVIDING SUFFICIENT VERTICAL WIND SHEAR FOR A FEW STRONG TO SEVERE STORMS TODAY AND WE HAVE RECEIVED A REPORT OF 0.75 INCH HAIL NEAR THE SOUTH RIM OF GRAND CANYON. THE GREATEST POTENTIAL FOR STRONG TO SEVERE STORMS AND FLASH FLOODING WILL BE ACROSS NORTH CENTRAL AND NORTHWEST ARIZONA WHERE DYNAMIC LIFT AND VERTICAL WIND SHEAR ARE MAXIMIZED AND POTENTIAL FOR ORGANIZED STORMS IS GREATEST. SEVERE STORM THREATS INCLUDE LARGE HAIL AND DAMAGING WINDS. THAT BEING SAID...ANY OF TODAY'S STORMS WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY RAIN WHICH MAY LEAD TO LOCALIZED FLOODING ISSUES. STORMS WILL CONTINUE THROUGH EARLY EVENING BEFORE DECREASING. EXPECT BY ABOUT MIDNIGHT THAT THE BULK OF THE CONVECTIVE ACTIVITY WILL BE WINDING DOWN AS THE THE TROUGH TO OUR NORTH BEGINS TO WEAKEN AND MOVE NORTH. A DRIER SOUTHWEST FLOW DEVELOPS ACROSS THE REGION OVER THE WEEKEND WHICH PUSHES THE MOISTURE PLUME EASTWARD. THE CHANCE FOR SHOWERS WILL CONTINUE SATURDAY GENERALLY FROM FLAGSTAFF EASTWARD WITH ONLY ISOLATED ACTIVITY TO THE WEST. EVEN FEWER STORMS ARE EXPECTED ON SUNDAY WITH ANY STORMS BEING CONFINED TO THE WHITE AND CHUSKA MOUNTAIN REGIONS. WE WILL TRANSITION BACK INTO A MORE TYPICAL MONSOON PATTERN NEXT WEEK WITH DAILY CHANCES FOR SHOWERS/THUNDERSTORMS AS HIGH PRESSURE CENTERS OVER NEW MEXICO AND TEXAS AND SOUTHERLY FLOW PERSISTS ACROSS ARIZONA. && .AVIATION...FOR THE 00Z PACKAGE...EXPECT SCT-NMRS SHRA/TSRA TO PERSIST THROUGH THIS EVENING. SCATTERED MVFR/IFR CONDS PSSBL IN STRONGER STORMS. THERE IS A THREAT FOR STRONGER STORMS PRODUCING DAMAGING WIND AND HAIL UP TO 1 INCH ACROSS NORTHERN COCONINO/NAVAJO COUNTIES (INCLUDING KGCN AND KPGA TERMINALS). STORMS DECREASING AND MOVING OFF TO THE EAST BTWN 02-05Z SATURDAY. LESS STORM COVERAGE EXPECTED SATURDAY AFTERNOON. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...FLASH FLOOD WATCH UNTIL MIDNIGHT MST TONIGHT FOR AZZ004>007-009- 012-015-038. && PUBLIC...MCS/MCS AVIATION...MCS FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 442 AM MST FRI AUG 7 2015 AZZ004>018-037>040-080645- 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- 442 AM MST FRI AUG 7 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 WILL CONTINUE TO DEVELOP ACROSS NORTHERN ARIZONA. A FEW OF THESE THUNDERSTORMS MAY BECOME SEVERE WITH LARGE HAIL OR STRONG WINDS. HEAVY RAIN WITH SUCCESSIVE STORMS WILL ELEVATE THE THREAT FOR LOCALIZED FLASH FLOODING IN NORTHWESTERN ARIZONA INTO THE EVENING HOURS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SATURDAY...THUNDERSTORM ACTIVITY WILL CONTINUE ACROSS NAVAJO AND APACHE COUNTIES. SUNDAY...NO SIGNIFICANT THREATS. MONDAY THROUGH THURSDAY...SHOWERS AND THUNDERSTORMS WILL RETURN. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER TO LOCAL LAW ENFORCEMENT...OR THE NATIONAL WEATHER SERVICE BY CALLING 1-888-745-1637.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1218 PM MST FRI AUG 7 2015 AZZ016-018-071945- EASTERN MOGOLLON RIM-NORTHERN GILA COUNTY- 1218 PM MST FRI AUG 7 2015 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL GILA AND SOUTHWESTERN NAVAJO COUNTIES... AT 1218 PM MST...A STRONG THUNDERSTORM WAS 12 MILES SOUTHEAST OF YOUNG...OR 25 MILES SOUTH OF FOREST LAKES...MOVING NORTHEAST AT 15 MPH. WIND GUSTS UP TO 50 MPH AND DIME SIZE HAIL ARE POSSIBLE WITH THIS STORM. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. LAT...LON 3391 11074 3396 11085 3422 11074 3412 11047 TIME...MOT...LOC 1918Z 207DEG 15KT 3397 11079 MOTTICE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
102 PM MST FRI AUG 07 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0101 PM HAIL 1 ENE GRAND CANYON VILL 36.05N 112.13W
08/07/2015 E0.75 INCH COCONINO AZ TRAINED SPOTTER
THREE QUARTER INCH SIZED HAIL LASTED A FEW MINUTES.
&&
EVENT NUMBER FGZ1500106
CLMSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
114 PM MST FRI AUG 7 2015
AZZ017-072045-
WHITE MOUNTAINS-
114 PM MST FRI AUG 7 2015
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN APACHE COUNTY UNTIL
145 PM MST...
AT 114 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR THREE FORKS...OR 21 MILES SOUTH OF SPRINGERVILLE...MOVING
NORTHEAST AT 15 MPH.
HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.
LOCATIONS IMPACTED INCLUDE...
THREE FORKS...ASPEN CAMPGROUND - EAST FORK BLACK RIVER...BUFFALO
CROSSING CAMPGROUND...HORSE SPRINGS CAMPGROUND...RACCOON
CAMPGROUND...ALPINE DIVIDE CAMPGROUND...DIAMOND ROCK CAMPGROUND AND
DEER CREEK CAMPGROUND.
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 3378 10924 3378 10933 3379 10937 3396 10929
3389 10912
TIME...MOT...LOC 2014Z 210DEG 13KT 3382 10928
MOTTICESPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
131 PM MST FRI AUG 7 2015
AZZ013-014-040-072115-
NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264-
LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY-
LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY-
131 PM MST FRI AUG 7 2015
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN NAVAJO AND WEST
CENTRAL APACHE COUNTIES UNTIL 215 PM MST...
AT 130 PM MST...TRAINED WEATHER SPOTTERS REPORTED A STRONG
THUNDERSTORM 14 MILES EAST OF WOODRUFF MOVING NORTHEAST AT 20 MPH. A
WIND GUST TO 49 MPH WAS MEASURED WITH THIS STORM AT PETRIFIED FOREST.
WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
PETRIFIED FOREST NATIONAL PARK.
LAT...LON 3464 10985 3483 10984 3491 10985 3505 10968
3477 10950
TIME...MOT...LOC 2030Z 225DEG 17KT 3484 10981
MOTTICEPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
138 PM MST FRI AUG 07 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1259 PM TSTM WND GST 2 NE MILEPOST 325 ON HW 34.82N 109.86W
08/07/2015 M49 MPH NAVAJO AZ TRAINED SPOTTER
49 MPH WIND GUST AT PETRIFIED FOREST NP.
&&
EVENT NUMBER FGZ1500107
CLMSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
217 PM MST FRI AUG 7 2015
AZZ018-072145-
NORTHERN GILA COUNTY-
217 PM MST FRI AUG 7 2015
...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL GILA COUNTY UNTIL
245 PM MST...
AT 217 PM MST...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 12
MILES NORTH OF HILLTOP...OR 35 MILES NORTHEAST OF GLOBE...MOVING
NORTH AT 30 MPH.
WIND GUSTS OF 50 TO 55 MPH WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
FORT APACHE RESERVATION.
LAT...LON 3383 11051 3385 11055 3397 11060 3398 11026
3383 11033
TIME...MOT...LOC 2117Z 176DEG 25KT 3380 11041
MOTTICEThe Flagstaff radar (KFSX), 67 km away, was scanning. The volume nearest the first event began at 22:38 UTC.
1 thunderstorm wind. Local standard time, as filed.
Winslow Police confirmed that a brick wall collapsed from strong thunderstorm winds. The Winslow ASOS reported a peak wind gust of 53 MPH at 339 PM MST.
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: 599028.