Thunderstorms with heavy rain cause water to flow over State Route 97 south of Bagdad.
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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 with heavy rain cause water to flow over State Route 97 south of Bagdad.
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 7, 10:00 AM MST, 3 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1000 AM MST THU SEP 7 2012 .SYNOPSIS...SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP EACH AFTERNOON AND EVENING THROUGH EARLY NEXT WEEK AS MONSOON MOISTURE REMAINS ACROSS NORTHERN ARIZONA. SOME OF THE STORMS MAY PRODUCE HEAVY RAINFALL AND THE POSSIBILITY OF FLOODING. && .DISCUSSION...SCATTERED SHOWERS AND A FEW THUNDERSTORMS CONTINUE THIS MORNING GENERALLY ALONG AND SOUTH OF INTERSTATE 40. THE STRONGEST ACTIVITY IS LOCATED ACROSS SOUTHERN YAVAPAI COUNTY. THIS AREA OF SHOWERS AND STORMS IS ASSOCIATED WITH A VERY MOIST ATMOSPHERE...WITH PRECIPITABLE WATER VALUES RUNNING WELL ABOVE NORMAL. WEAK DISTURBANCES MOVING SE TO NW THROUGH SOUTHERN AZ SHOULD ALSO CONTINUE TO ENHANCE CONVECTIVE ACTIVITY TODAY IN THIS AREA. DUE TO VERY HIGH PRECIPITABLE WATER...ANY SHOWERS AND STORMS THAT DEVELOP WILL BE CAPABLE OF HIGH RAINFALL RATES. SLOW STORM MOTION COMBINED WITH THE HEAVY RAIN MAY LEAD TO THE THREAT OF FLASH FLOODING. WILL ISSUE A FLASH FLOOD WATCH THROUGH THIS EVENING ROUGHLY SOUTH OF A SELIGMAN...TO SEDONA...TO ST JOHNS LINE. .PREV DISCUSSION...(330 AM MST)...A SMALL PUSH OF DRIER AIR IS EXPECTED FOR FAR NORTHERN AZ SATURDAY...BUT LOW PRESSURE DEVELOPING ALONG THE WEST COAST IS EXPECTED TO BRING ANOTHER PUSH OF VERY MOIST AIR NORTHWARD INTO NORTHERN AZ FOR SUNDAY THROUGH TUESDAY. THIS WILL LIKELY LEAD TO A FEW DAYS WITH GOOD COVERAGE OF SHOWERS AND THUNDERSTORMS ACROSS NORTHERN AZ. ONCE THE WESTERN TROUGH PASSES...A DOWNTREND IN THE CHANCE FOR PRECIPITATION IS IN STORE FOR THE LATTER HALF OF NEXT WEEK...BUT ISOLATED TO SCATTERED THUNDERSTORMS ARE LIKELY TO CONTINUE. && .AVIATION...FOR THE 18Z PACKAGE...BKN-OVC CLOUDS WITH BASES FROM 6-8KFT AGL WILL CONTINUE ALONG AND SOUTH OF A LINE FROM KIGM TO KRQE. SCT TO NMRS -SHRA/TSRA AND ISOLD +TSRA ARE EXPECTED ACROSS NORTHERN AZ TODAY. THE STRONGEST STORMS WILL PRODUCE TORRENTIAL RAIN AND LOCAL IFR CONDITIONS. CONVECTION WILL SLOWLY DIMINISH BUT NOT END AFT 03Z SATURDAY. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH UNTIL 9 PM MST THIS EVENING FOR AZZ008-013-014-016>018-037-038. && PUBLIC.........JJ / ONTON AVIATION.......41 FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 608 AM MST FRI SEP 7 2012 AZZ004>018-037>040-080700- 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- 608 AM MST FRI SEP 7 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ARIZONA...NORTH CENTRAL ARIZONA...NORTHEAST ARIZONA AND WEST CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT MOISTURE HAS CONTINUED TO INCREASE OVER NORTHERN ARIZONA TODAY...AND WILL BRING INCREASED COVERAGE OF SHOWERS AND THUNDERSTORMS COMPARED WITH THURSDAY. SLOW STORM MOTION WILL BRING A THREAT OF HEAVY RAIN WITH LOCALIZED FLOODING POSSIBLE. OTHER STORM THREATS TODAY INCLUDE LIGHTNING...AND HAIL IN THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED TO NUMEROUS AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ARE EXPECTED EACH AFTERNOON AND EVENING THROUGH EARLY NEXT WEEK. THUNDERSTORM ACTIVITY WILL LIKELY DECREASE BEGINNING MIDWEEK. .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.
Yavapai County Sheriff Department reported debris along State Route 97 near mile post 163 (about 5 miles south of Bagdad).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2012Every state in 2012This day in weather historyWarnings in Arizona, September 2012
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: 413041.