Heavy rain caused a rock slide on Highway 60 and flash flooding on State Route 73.
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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.
Heavy rain caused a rock slide on Highway 60 and flash flooding on State Route 73.
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 6, 2:20 PM MST, 2 hours 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 220 PM MST MON AUG 6 2007 .SYNOPSIS...EXPECT AFTERNOON AND EVENING RAIN SHOWERS AND THUNDERSTORMS TO DIMINISH IN COVERAGE FROM WEST TO EAST THROUGH THURSDAY. MOIST CONDITIONS MAY RETURN FOR FRIDAY AND THE WEEKEND. && .DISCUSSION...A SLOW MOVING TROUGH OF LOW PRESSURE LIES OVER THE PACIFIC NORTHWEST WITH ITS AXIS ALONG A LINE FROM ABOUT SPOKANE WA TO EUREKA CA. AS THE TROUGH MOVES EASTWARD...IT WILL CONTINUE TO INTRODUCE DRIER...MORE STABLE AIR TO NORTHERN ARIZONA. SATELLITE IMAGERY SHOWS THE AREA WEST OF A LINE FROM ABOUT KAYENTA TO PRESCOTT TO BE DOTTED WITH ONLY FAIR WEATHER CUMULUS. THIS AREA CORRESPONDS NICELY WITH AN AREA OF LOWER EQUIVALENT POTENTIAL TEMPERATURE SLOWLY MAKING ITS WAY EASTWARD ACROSS THE STATE. EAST OF THE KAYENTA-PRESCOTT LINE CLOUDINESS IS MORE WIDESPREAD...BUT CONVECTION AND ASSOCIATED HEAVIER PRECIPITATION IS ANCHORED OVER THE HIGHER TERRAIN OF THE EASTERN MOGOLLON RIM AND WHITE MOUNTAINS. THIS AREA CORRESPONDS WELL TO NEGATIVE LIFTED INDICES. WHERE STORMS HAVE DEVELOPED TODAY...EXPECT THEM TO DIE OUT LATER THIS EVENING. FOR TUESDAY THROUGH THURSDAY...THE GFS AND NAM TELL SLIGHTLY DIFFERENT TALES WHEN IT COMES TO A DRYING TREND. THE GFS INTRODUCES MORE DRY AIR FOR A LONGER PERIOD. THE NAM DOESNT DRY THINGS OUT AS MUCH OR FOR AS LONG. EITHER WAY...EXPECT TO SEE A DECIDED DOWNTURN IN THUNDERSTORM ACTIVITY ACROSS NORTHERN ARIZONA FOR THE NEXT COUPLE OF DAYS. THE ONLY EXCEPTION COULD BE OVER THE WHITE MOUNTAINS WHERE A BIT OF AFTERNOON ACTIVITY MAY LINGER. FOR FRIDAY AND BEYOND...EXPECT THE REINTRODUCTION OF MOISTURE AND INSTABILITY. && AVIATION...FOR THE 00Z PACKAGE...SCATTERED TO NUMEROUS TSRA WILL CONTINUE THROUGH 03Z WITH VSBY 2SM AND CIGS BKN020 IN THE HEAVIER SHOWERS...MAINLY ALONG AND SOUTH OF INTERSTATE 40 AND EAST OF INTERSTATE 17. ISOLATED TSRA ELSEWHERE WITH BASES BETWEEN 10K TO 13K FEET MSL. THUNDERSTORMS DIMINISHING AFTER 04Z...WITH ISOLD SHOWERS THROUGH 08Z AND AREAS OF CEILINGS 7-10 KFT AGL TIL 14Z OVER THE EASTERN MOGOLLON RIM AND WHITE MOUNTAINS. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && HOWARD/TC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 940 AM MST MON AUG 6 2007 AZZ004>018-037>040-070700- WESTERN MOGOLLON RIM-GRAND CANYON COUNTRY-YAVAPAI COUNTY MOUNTAINS- YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS- MARBLE AND GLEN CANYONS-KAIBAB PLATEAU-COCONINO PLATEAU- NORTHEAST PLATEAU AND MESAS HWY 264 NORTHWARD- NORTHEAST PLATEAU AND MESAS SOUTH OF HWY 264- CHINLE VALLEY-CHUSKA MOUNTAINS AND DEFIANCE PLATEAU- BLACK MESA AREA-LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- EASTERN MOGOLLON RIM-WHITE MOUNTAINS-NORTHERN GILA COUNTY- 940 AM MST MON AUG 6 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY EXPECT DIMINISHED THUNDERSTORM ACTIVITY WEST OF A LINE FROM PAGE TO PRESCOTT. EAST OF THAT LINE...EXPECT SCATTERED THUNDERSTORMS TO FIRST DEVELOP BY LATE MORNING OVER THE HIGH TERRAIN OF APACHE COUNTY. DEVELOPMENT OVER CENTRAL PORTIONS OF THE STATE WILL BE DELAYED DUE TO LINGERING CLOUD COVER. STORMS WILL MOVE SLOWLY FROM SOUTHWEST TO NORTHEAST. SLOW STORM MOVEMENT WILL INCREASE THE POTENTIAL FOR LOCALIZED FLOODING. EXPECT ACTIVITY TO DIE DOWN AFTER MIDNIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY DRIER...MORE STABLE CONDITIONS OVER WESTERN ARIZONA WILL MOVE EASTWARD THROUGH MIDWEEK BRINGING A DOWNTURN IN CONVECTIVE ACTIVITY. IT APPEARS MORE MOISTURE WILL RETURN TO THE NORTHLAND BY THE WEEKEND. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. HOWARD
The Flagstaff radar (KFSX), 106 km away, was scanning. The volume nearest the first event began at 23:44 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain caused a rock slide that close Highway 60 at mile marker 321. Flash flooding was observed on State Route 73. Huston Creek overflowed in Star Valley and flooded about 20 homes and/or trailers.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2007Every state in 2007This day in weather historyWarnings in Arizona, August 2007
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: 55138.