Thunderstorms with heavy rain produced flash flooding in areas that have burned in the past 13 months.
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 with heavy rain produced flash flooding in areas that have burned in the past 13 months.
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 10, 3:10 PM MST, 1 hour 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 310 PM MST SUN JUL 10 2011 .SYNOPSIS...MONDAY WILL BRING ANOTHER AFTERNOON AND EVENING OF SHOWERS AND THUNDERSTORMS. A PROGRESSIVE DRYING TREND WILL BEGIN ON TUESDAY WITH CHANCES FOR PRECIPITATION DROPPING INTO THE SINGLE DIGITS BY THURSDAY. MONSOONAL MOISTURE WILL MAKE ITS WAY BACK INTO THE STATE OVER THE WEEKEND. && DISCUSSION...CONVECTION FIRED UP AND PERSISTS OVER THIS MORNING'S CLOUD-FREE AREAS. STORMS BEGAN TO FORM IN PREVIOUSLY CLOUDY AREAS ONLY IN THE LAST HOUR. LOW PRESSURE OVER BRITISH COLUMBIA'S QUEEN CHARLOTTE ISLANDS WILL PRODUCE A SIGNIFICANT CHANGE IN OUR WEATHER THIS WEEK. AS EARLY AS TOMORROW AFTERNOON...AS THE LOW MOVES SOUTH...DRIER AIR WILL START TO FILTER INTO WESTERN ARIZONA. WHILE WE'LL STILL SEE TYPICAL RAIN SHOWERS AND THUNDERSTORMS ON MONDAY...IT SEEMS CONVECTION WILL DIMINISH CONSIDERABLY ON TUESDAY. THIS TREND WILL CONTINUE THROUGH THE END OF THE WORK WEEK WITH THE POTENTIAL FOR A COMPLETELY RAIN-FREE THURSDAY AND FRIDAY ACROSS NORTHERN ARIZONA. BY THE WEEKEND...RIDGING WILL NUDGE WESTWARD TO PROVIDE SOUTHERLY FLOW ACROSS THE STATE AND THE RETURN OF MONSOONAL MOISTURE. && .AVIATION...FOR THE 00Z PACKAGE...SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS EVENING BEFORE DECREASING IN COVERAGE AND INTENSITY AFTER 03Z. STORMS WILL REDEVELOP MONDAY MORNING AFTER 17Z THROUGH EARLY EVENING HOURS. GUSTY AND ERRATIC WINDS AND MVFR/LCL IFR CONDITIONS SHOULD BE EXPECTED NEAR STORMS. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC..................HOWARD AVIATION/FIRE WEATHER...BOHLIN FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 936 AM MST SUN JUL 10 2011 AZZ004>018-037>040-110715- 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- 936 AM MST SUN JUL 10 2011 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 EXPECT WIDELY SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS TO DEVELOP OVER CLOUD-FREE AREAS BY LATE MORNING. WHERE CLOUD COVER EXISTS...VIGOROUS CONVECTION WILL LIKELY BE DELAYED BY A FEW HOURS. STORMS WILL DRIFT SLOWLY FROM SOUTH TO NORTH. TODAY'S STORMS WILL PRODUCE SMALL HAIL AND LOCALLY HEAVY PRECIPITATION...CAUSING SOME ISOLATED NUISANCE FLOODING. CONVECTION WILL DIMINISH WITHIN A FEW HOURS OF SUNSET IN MOST LOCATIONS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY LOOK FOR SHOWERS AND THUNDERSTORMS AGAIN MONDAY. BY TUESDAY...GRADUAL DRYING BEGIN TO CREEP EASTWARD ACROSS THE STATE. MOISTURE SHOULD RETURN NEXT WEEKEND. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. HOWARD
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
304 PM MST SUN JUL 10 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0259 PM HEAVY RAIN MAYER 34.40N 112.24W
07/10/2011 M1.50 INCH YAVAPAI AZ TRAINED SPOTTER
NUISANCE FLOODING IN MAYER CAUSED BY 1.5 INCHES RAIN IN
45 MINUTES.
&&
EVENT NUMBER FGZ1100178
HOWARDThe Flagstaff radar (KFSX), 91 km away, was scanning. The volume nearest the first event began at 23:28 UTC.
2 flash flood. Local standard time, as filed.
Several intersections along Campbell Avenue were impassable due to small debris, rocks, with shallow surface water overflowing intended drainages.
Colter Creek in Nutrioso was flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2011Every state in 2011This day in weather historyWarnings in Arizona, July 2011
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: 333021, 333022.