Lingering moisture led to thunderstorms from Bisbee to Ajo. Some storms produced heavy rainfall, mainly in the Sierra Vista area.
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 TWC wrote it up.
Lingering moisture led to thunderstorms from Bisbee to Ajo. Some storms produced heavy rainfall, mainly in the Sierra Vista area.
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 Tucson, AZ wrote its last area forecast discussion before the first event at Jul 5, 2:06 PM MST, 2 hours 24 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 206 PM MST THU JUL 5 2012 .SYNOPSIS...MUCH LESS THUNDERSTORM ACTIVITY THIS AFTERNOON AND AGAIN FRIDAY AS THE ATMOSPHERE RECOVERS AND WE SEE SOME DRYING. THEN A CHANCE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THIS WEEKEND INTO NEXT WEEK. && .DISCUSSION...WATER VAPOR IMAGERY SHOWS THE CENTER OF CIRCULATION ASSOCIATED WITH THE UPPER LOW THAT BROUGHT THE HEAVY RAIN AND FLOODING TO THE AREA YESTERDAY IS NOW OVER NORTHERN UTAH. PLENTY OF MID LEVEL DRY AIR POISED TO OUR WEST OVER MUCH OF THE EASTERN PACIFIC WITH THIS AIR FILTERING INTO CALIFORNIA...MUCH OF ARIZONA... BAJA AND SONORA MEXICO. THIS MORNINGS KTWC SOUNDING SHOWED A PRECIPITABLE WATER VALUE OF 1.24 INCHES...WHICH WAS DOWN OVER THREE TENTHS OF AN INCH FROM THE 05/00Z SOUNDING AND DOWN NEARLY A HALF INCH FROM THE 04/12Z SOUNDING. THE GOES DERIVED PRODUCTS IMAGERY OF THE BLENDED TOTAL WATER SHOWS VALUES OF AROUND 1.1-1.3 INCHES OVER CENTRAL AND SOUTHERN ARIZONA WITH VALUES BELOW 1 INCH OVER PORTIONS OF CALIFORNIA AND BAJA AND VALUES LESS THAN A HALF INCH OVER THE EASTERN PACIFIC WATERS. NAM MODEL SOUNDINGS SHOW PW VALUES DROPPING TO AROUND THE 1 INCH MARK BY THIS AFTERNOON. VISIBLE SATELLITE IMAGERY SHOWS SOME CUMULUS DEVELOPING ACROSS PORTIONS OF THE FORECAST AREA WITH SHOWER AND THUNDERSTORM DEVELOPMENT MAINLY OVER NORTHEAST SONORA MEXICO AND SOUTHWEST AND WEST CENTRAL NEW MEXICO. WITH THE DRY AIR FILTERING IN FROM THE WEST EXPECT RAIN CHANCES TO BE RATHER LOW AND CONFINED MAINLY TO THE EASTERN ZONES AND MORE SPECIFICALLY AREAS RIGHT ALONG THE NEW MEXICO BORDER. SHOULD SEE ANOTHER RELATIVELY DRY DAY AGAIN ON FRIDAY...ALBEIT SOME ISOLATED TO LOW END SCATTERED CONVECTION ALONG THE NEW MEXICO BORDER AS WELL AS NEAR THE INTERNATIONAL BORDER. BY THIS WEEKEND THE MOISTURE SHOULD BEGIN TO RETURN AS EASTERLY FLOW DEVELOPS AS THE HIGH RETROGRADES TOWARD THE FOUR CORNERS REGION OR GREAT BASIN AREA DEPENDING ON MODEL OF CHOICE. AS A RESULT HIGH TEMPS SHOULD ALSO WARMUP TO SEVERAL DEGREES ABOVE THE 100 DEGREE MARK FOR SUNDAY THROUGH TUESDAY. THE BOTTOM LINE IS A MORE TYPICAL FORECAST WITH LOW END CHANCE POPS FOR THE DESERTS/VALLEYS AND CHANCE TO LIKELY POPS FOR THE HIGHER TERRAIN THROUGH THE MIDDLE TO LATTER PART OF NEXT WEEK. && .AVIATION...SCT CLOUDS AT 4-7KFT AGL THRU 06/03Z...THEN SKC-FEW CLOUDS AT 5-8KFT AGL THRU 06/13Z. ISOLD -SHRA/-TSRA MAINLY EAST OF A KSAD-KOLS LINE THRU 06/03Z. SURFACE WIND GENERALLY LESS THAN 10 KTS THRU 06/14Z...EXCEPT IN THE KSAD VALLEY WHERE WLY/NWLY SURFACE WIND OF 12-17 KTS CAN BE EXPECTED THRU 06/02Z. POTENTIAL WIND GUSTS TO NEAR 40 KTS AND MVFR CIGS/VSBYS IN THE VICINITY OF ANY -TSRA THAT DO DEVELOP. AVIATION DISCUSSION NOT UPDATED FOR TAF AMENDMENTS. && .FIRE WEATHER...DRIER THIS AFTERNOON AND TONIGHT WITH ONLY ISOLATED SHOWERS AND THUNDERSTORMS MAINLY EAST OF THE TUCSON AREA. THERE WILL THEN BE A CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THROUGH THE UPCOMING WEEKEND AND INTO NEXT WEEK. AFTER TODAY...NEAR SEASONAL DAYTIME TEMPERATURES ARE EXPECTED INTO NEXT WEEK. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. PUBLIC DISCUSSION...GM AVIATION/FIRE WEATHER...GZ WEATHER.GOV/TUCSON
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 223 PM MST THU JUL 5 2012 AZZ503>507-513>515-061400- UPPER SANTA CRUZ RIVER VALLEY/ALTAR VALLEY-TUCSON METRO AREA- SOUTH CENTRAL PINAL COUNTY-SOUTHEAST PINAL COUNTY- UPPER SAN PEDRO RIVER VALLEY- DRAGOON AND MULE AND HUACHUCA AND SANTA RITA MOUNTAINS- CATALINA AND RINCON MOUNTAINS-BABOQUIVARI MOUNTAINS- 223 PM MST THU JUL 5 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT. ISOLATED MAINLY MOUNTAIN SHOWERS OR THUNDERSTORMS MAY DEVELOP LATE THIS AFTERNOON AND INTO THE EARLY EVENING HOURS. A FEW OF THE STORMS THAT DEVELOP COULD PRODUCE BRIEF PERIODS OF MODERATE RAINFALL. GUSTY AND ERRATIC WINDS MAY OCCUR WITH A FEW OF THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH THURSDAY. ANOTHER RELATIVELY DRY DAY ON FRIDAY WITH ONLY ISOLATED VALLEY SHOWERS AND THUNDERSTORMS AND SCATTERED MOUNTAINS THUNDERSTORMS DURING THE AFTERNOON AND EVENING. A RETURN TO MORE OF A TYPICAL MONSOON FORECAST SATURDAY THROUGH THURSDAY AS MOISTURE INCREASES FROM THE EAST. AS WITH ANY THUNDERSTORM DURING THIS TIME OF YEAR...A FEW COULD BE CAPABLE OF PRODUCING STRONG GUSTY WINDS...BRIEF HEAVY DOWNPOURS AND DANGEROUS LIGHTNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ508>512-061400- EASTERN COCHISE COUNTY BELOW 5000 FEET-UPPER GILA RIVER VALLEY- WHITE MOUNTAINS OF GRAHAM AND GREENLEE COUNTIES- GALIURO AND PINALENO MOUNTAINS-CHIRICAHUA MOUNTAINS- 223 PM MST THU JUL 5 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT. ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS MAY DEVELOP LATE THIS AFTERNOON AND INTO THE EARLY EVENING HOURS. A FEW OF THE STORMS THAT DEVELOP COULD PRODUCE BRIEF PERIODS OF MODERATE RAINFALL. GUSTY AND ERRATIC WINDS MAY OCCUR WITH A FEW OF THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH THURSDAY. ANOTHER RELATIVELY DRY DAY ON FRIDAY WITH ONLY ISOLATED VALLEY SHOWERS AND THUNDERSTORMS AND SCATTERED MOUNTAINS THUNDERSTORMS DURING THE AFTERNOON AND EVENING. A RETURN TO MORE OF A TYPICAL MONSOON FORECAST SATURDAY THROUGH THURSDAY AS MOISTURE INCREASES FROM THE EAST. AS WITH ANY THUNDERSTORM DURING THIS TIME OF YEAR...A FEW COULD BE CAPABLE OF STRONG GUSTY WINDS...BRIEF HEAVY DOWNPOURS AND DANGEROUS LIGHTNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ501-502-061400- WESTERN PIMA COUNTY-TOHONO O'ODHAM NATION- 223 PM MST THU JUL 5 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH THURSDAY. ANOTHER RELATIVELY DRY DAY ON FRIDAY WITH ONLY ISOLATED SHOWERS AND THUNDERSTORMS DURING THE AFTERNOON AND EVENING. A RETURN TO MORE OF A TYPICAL MONSOON FORECAST SATURDAY THROUGH THURSDAY AS MOISTURE INCREASES FROM THE EAST. AS WITH ANY THUNDERSTORM DURING THIS TIME OF YEAR...A FEW COULD BE CAPABLE OF STRONG GUSTY WINDS...BRIEF HEAVY DOWNPOURS AND DANGEROUS LIGHTNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. WEATHER.GOV/TUCSON
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
358 PM MST THU JUL 05 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0354 PM FLASH FLOOD 3 NNE CORONADO NATIONAL 31.39N 110.24W
07/05/2012 COCHISE AZ PUBLIC
FLASH FLOODING ONGOING IN ASH CANYON OF THE HUACHUCA
MOUNTAINS. 2 TO 3 FEET OF WATER CURRENTLY FLOWING DOWN
THE CANYON WITH HEAVY RAIN ONGOING.
&&
EVENT NUMBER TWC1200013
BROSTThe Tucson radar (KEMX), 69 km away, was scanning. The volume nearest the first event began at 23:31 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain fell on part of the 2011 Monument Fire burn scar area. In particular, the Ash Canyon watershed was affected which caused flooding along Prince Placer Road and Stone Ridge Road.
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: 401850.