90 inches in 40 minutes), street flooding, and debris on roadways.
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 caused heavy rain (0.90 inches in 40 minutes), street flooding, and debris on roadways.
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 Jul 28, 9:10 AM MST, 2 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 910 AM MST SAT JUL 28 2012 .SYNOPSIS...MOIST SOUTHEASTERLY FLOW WILL KEEP NORTHERN ARIZONA IN A WET PATTERN THROUGH THE FIRST HALF OF NEXT WEEK. EXPECT GOOD CHANCES FOR SHOWERS AND THUNDERSTORMS EACH DAY. && .DISCUSSION...THIS MORNINGS RADAR AND SATELLITE IMAGERY SHOW VERY LITTLE CONVECTIVE ACTIVITY ACROSS NORTHERN ARIZONA. EXPECT AN INCREASE IN ACTIVITY LATER THIS MORNING AS THE GROUND HEATS UP CAUSING SHOWERS AND THUNDERSTORMS TO DEVELOP ACROSS THE REGION. THE HIGH PRESSURE RIDGE EAST OF ARIZONA WILL KEEP US IN MOIST SOUTHEASTERLY FLOW THROUGH MUCH OF THE WEEK. EXPECT GOOD CHANCES FOR SHOWERS AND THUNDERSTORMS EACH DAY WITH COVERAGE DIMINISHING AROUND SUNSET. THE MAIN THREAT THROUGH THE WEEKEND WILL BE FROM HEAVY RAIN PRODUCING EXCESSIVE RUNOFF ON ALREADY SATURATED SOILS OR SLOW MOVING STORMS WHICH MAY PRODUCE FLASH FLOODING IN FLOOD PRONE AREAS...SUCH AS NORMALLY DRY WASHES AND RECENT BURN AREAS. && .AVIATION... FOR THE 18Z PACKAGE...ISOLD-SCT SHRA/TSRA...EXCEPT SCT-NMRS COVERAGE EAST OF A KRQE-KSOW LINE...THIS AFTERNOON AND EVENING. MVFR/IFR CONDITIONS PSBL IN THE STRONGEST STORMS. CONVECTION DIMINISHING 03-06Z BUT SOME SHOWERS WILL PERSIST OVERNIGHT. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC.........BOHLIN AVIATION.......DB FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 330 AM MST SAT JUL 28 2012 AZZ004>018-037>040-290700- 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- 330 AM MST SAT JUL 28 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY INCREASING MOISTURE AND A MORE UNSTABLE AIRMASS WILL ARRIVE OVER THE REGION TODAY. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED BY LATE MORNING INTO THE AFTERNOON...ESPECIALLY ALONG AND JUST SOUTH OF THE MOGOLLON RIM AND WHITE MOUNTAINS. STORMS WILL ALSO SPREAD INTO WESTERN COCONINO COUNTY AND THE KAIBAB PLATEAU BY EARLY AFTERNOON. SLIGHTLY LESS COVERAGE WILL BE FOUND NORTHEAST OF THE LITTLE COLORADO RIVER VALLEY ...TOWARD THE FOUR CORNERS. THE BEST CHANCE OF HEAVY RAIN PRODUCING STORMS WILL BE OVER EASTERN YAVAPAI COUNTY...AS WELL AS NORTHERN GILA AND SOUTHERN COCONINO COUNTIES. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY MOIST SOUTHEAST FLOW WILL BRING A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS EACH DAY. THE THREAT OF FLOODING...DUE TO PERSISTENT AND NUMEROUS SHOWERS AND THUNDERSTORMS...WILL BE ON THE INCREASE THROUGH THE EARLY PART OF NEXT WEEK. .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.
Whiteriver Police reported 0.90 inches of rain in 40 minutes and debris on Route 73.
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, July 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: 405619.