Thunderstorms produced heavy rain and street flooding in Dewey-Humbolt.
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 produced heavy rain and street flooding in Dewey-Humbolt.
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 24, 10:00 AM MST, 2 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1000 AM MST TUE JUL 24 2012 .SYNOPSIS...A MOIST AND UNSTABLE AIR MASS WILL CONTINUE TO BRING SCATTERED SHOWERS AND THUNDERSTORMS TODAY. FOR WEDNESDAY AND THURSDAY...A DRIER AND MORE STABLE AIR MASS WILL MOVE IN FROM OVER THE EASTERN PACIFIC WITH A DOWNTURN IN THUNDERSTORMS ACTIVITY. BY FRIDAY...MOIST SOUTHERLY FLOW WILL RETURN WITH MONSOON ACTIVITY RAMPING-UP HEADING INTO THE WEEKEND. && .DISCUSSION... VERY MOIST ATMOSPHERE REMAINS OVER NORTHERN ARIZONA THIS MORNING. AN AREA OF THUNDERSTORMS PERSISTED OVERNIGHT BETWEEN FLAGSTAFF...THE GRAND CANYON...AND PAGE. THIS AREA IS DISSIPATING. A MESOSCALE CONVECTIVE COMPLEX SOUTHEAST OF FLAGSTAFF LAST NIGHT GENERATED A MESOSCALE CONVECTIVE VORTEX AND IS INITIATING CONVECTION ALREADY THIS MORNING AND WILL CONTINUE TO DO SO WELL INTO THE AFTERNOON. SOUTHWEST OF FLAGSTAFF OVER YAVAPAI COUNTY THE SKIES HAVE CLEARED. THIS WILL ALLOW FOR STRONG SURFACE HEATING AND ANOTHER ROUND OF THUNDERSTORMS THIS AFTERNOON. ANY THUNDERSTORMS THAT FORM TODAY WILL HAVE THE POTENTIAL TO PRODUCE HEAVY RAIN AND FLASH FLOODING. && .PREV DISCUSSION /230 AM MST/...SHOWERS AND THUNDERSTORMS OVER NORTH CENTRAL ARIZONA WILL GENERALLY DECREASE IN NUMBER TOWARD SUNRISE BUT NOT END COMPLETELY. ISOLATED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO LAST THROUGH THE MORNING HOURS AS A WEAK DISTURBANCE ALOFT MOVES ACROSS NORTHERN ARIZONA. THE TOUGH CALL FOR TODAY IS HOW MUCH SHOWER AND STORM ACTIVITY WILL THERE BE FROM ABOUT FLAGSTAFF WESTWARD. HIGH PRESSURE FROM THE EASTERN PACIFIC WILL BEGIN TO MOVE OVER THE AREA AND THIS WILL BE ACCOMPANIED BY WARMER AIR ALOFT. BETWEEN A SOMEWHAT COOL BOUNDARY LAYER...SOME CLOUDS AND A DEVELOPING WARM CAP ALOFT COULD SEE SUPPRESSED ACTIVITY. EAST OF FLAGSTAFF AND TOWARD THE NEW MEXICO BORDER IT SHOULD REMAIN ACTIVE WITH DEEP MOISTURE...NO CAP AND THE WEAK DISTURBANCE MOVING ACROSS THE AREA. FOR WEDNESDAY AND THURSDAY...THE EASTERN PACIFIC HIGH WILL BRING WARMER AIR ALOFT AND SOME DRYING TO NORTHERN ARIZONA. EXPECT A GENERAL DOWNTURN IN THUNDERSTORM ACTIVITY AS A MORE STABLE AIR MASS DOMINATES. MUCH OF THE AREA WILL ONLY SEE A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. AFTERNOON THUNDERSTORMS ARE EXPECTED TO CONTINUE ALONG THE NEW MEXICO BORDER AND OVER THE WHITE MOUNTAINS. FOR FRIDAY AND THE WEEKEND...MODELS ARE PROMISING A RETURN TO SOUTHEASTERLY FLOW AND MONSOON MOISTURE WITH THE CHANCE OF SHOWERS AND THUNDERSTORMS ON THE INCREASE ACROSS NORTHERN ARIZONA. && .AVIATION...FOR THE 18Z PACKAGE...SCATTERED THUNDERSTORMS WILL REDEVELOP AROUND NOON WITH MVFR/IFR CONDITIONS UNDER HEAVY SHOWERS. THUNDERSTORM COVERAGE SHOULD DIMINISH TO ISOLATED BY 02-03Z. AVIATION DISCUSSION NOT UPDATED FOR AMENDMENTS. && .FIRE WEATHER...MOIST CONDITIONS WILL CONTINUE TODAY WITH SCATTERED AFTERNOON THUNDERSTORMS. A DRYING TREND WILL BEGIN ON WEDNESDAY WITH STORM COVERAGE DECREASING SUBSTANTIALLY EXCEPT OVER THE WHITE MOUNTAINS. THURSDAY THROUGH SATURDAY...RELATIVELY DRY CONDITIONS FOR JULY WILL PERSIST THROUGH THURSDAY AND FRIDAY...BEFORE SOUTHERLY FLOW BRINGS SCATTERED AFTERNOON AND EVENING SHOWER AND THUNDERSTORM ACTIVITY BACK NORTH AND WEST OVER THE WEEKEND. WINDS WILL BE LIGHT THROUGH THE PERIOD WITH MINIMUM RELATIVE HUMIDITY VALUES RANGING FROM 20 TO 35 PERCENT. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && PUBLIC.........MAS/MCCOLLUM AVIATION.......RB FIRE WEATHER...RB/AT FOR NORTHERN ARIZONA WEATHER INFORMATION VISIT WEATHER.GOV/FLAGSTAFF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 542 AM MST TUE JUL 24 2012 AZZ004>018-037>040-250930- 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- 542 AM MST TUE JUL 24 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 AND TONIGHT A MOIST AND UNSTABLE AIR MASS ACROSS THE REGION WILL BRING A CONTINUATION OF SHOWERS AND THUNDERSTORMS TODAY. STRONGER STORMS WILL HAVE THE POTENTIAL TO PRODUCE LOCALIZED FLOODING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY EXPECT A DOWNTURN IN ACTIVITY ON WEDNESDAY AND THURSDAY AS A SOMEWHAT DRIER AIR MASS MOVES ACROSS THE AREA. SOUTHERLY FLOW AND MONSOON MOISTURE WILL RETURN BY FRIDAY AND OVER THE WEEKEND. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
945 AM MST TUE JUL 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0845 AM FLASH FLOOD SUPAI 36.22N 112.69W
07/24/2012 COCONINO AZ LAW ENFORCEMENT
LAW ENFORCEMENT REPORTED A 3 TO 4 FOOT RISE IN HAVASU
CREEK NEAR SUPAI VILLAGE.
&&
EVENT NUMBER FGZ1200068
RICKEYPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1047 AM MST TUE JUL 24 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0845 AM HEAVY RAIN SUPAI 36.22N 112.69W
07/24/2012 E2.50 INCH COCONINO AZ LAW ENFORCEMENT
LAW ENFORCEMENT REPORTED A 3 TO 4 FOOT RISE IN HAVASU
CREEK NEAR SUPAI VILLAGE.
&&
CORRECTED EVENT
EVENT NUMBER FGZ1200068
RICKEYThe national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Heavy rain (2.10 inches) fell in Dewey-Humbolt. The intersection of Agua Fria and Prescott Street was close for a while due to high water.
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: 405607.