Abundant monsoonal moisture caused numerous thunderstorms across much of Southeast Arizona.
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.
Abundant monsoonal moisture caused numerous thunderstorms across much of Southeast Arizona.
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 19, 1:05 PM MST, 3 hours 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 105 PM MST THU JUL 19 2007 .SYNOPSIS...HIGH PRESSURE ALOFT WILL REMAIN NEAR THE FOUR CORNERS. ADEQUATE MOISTURE IN COMBINATION WITH DAYTIME HEATING WILL PROVIDE ISOLATED TO SCATTERED THUNDERSTORMS MAINLY DURING THE AFTERNOON AND EVENING HOURS. ACTIVITY WILL INCREASE INTO THE WEEKEND AS STRONGER EASTERLY FLOW OCCURS. && .DISCUSSION...STARTING TO SEE SOME DEVELOPMENT ALONG THE RIM WITH A THUNDERSTORM SOUTHWEST OF ST JOHNS. CURRENT WATER VAPOR SHOWS DRIER AIR CONTINUING TO PUSH INTO SE AZ...STARTING TO WORK ITS WAY INTO SANTA CRUZ AND EXTREME EASTERN PIMA. EXPECTING DEVELOPMENT TO START EITHER ALONG THE RIM OR ALONG THIS WET/DRY BOUNDRY. GOES IMAGERY SHOWS PW VALUES RANGING FROM AROUND AN INCH TO A LITTLE OVER AN INCH AND A HALF...COINCIDING VERY WELL WITH THIS MORNINGS SOUNDING. CURRENT TEMPERATURE AT KTUS HAS JUMPED UP TO 101. WITH A COUPLE OF HOURS OF HEATING LEFT TO GO...HIGH OF 102 SHOULD BE RIGHT ON THE MARK..IF NOT SLIGHTLY UNDERDONE. MODELS STILL PROGGING UP DAYS TODAY AND TOMORROW WITH REGARDS TO SHOWERS AND THUNDERSTORMS WITH AT LEAST A SLIGHT DOWNWARD TREND IN AFTERNOON HIGH TEMPERATURES. WITH MINOR TWEAKS AND UPDATES...INHERITED FORECAST LOOKED FINE. FOR FURTHER DETAILS AND DISCUSSION...PLEASE REFER TO PREV DISCUSSION SECTION BELOW. KEMX RADAR IS NOW OPERATIONAL. && .FIRE WEATHER...THE DAILY CYCLE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS IS EXPECTED TO CONTINUE INTO THE WEEKEND. WINDS WILL BE DIURNALLY DRIVEN...WITH AFTERNOON GUSTS UP TO 25 MPH DUE TO SURFACE HEATING. ADDITIONALLY...ANY THUNDERSTORMS THAT OCCUR WILL BE CAPABLE OF PRODUCING STRONG...GUSTY AND ERRATIC WINDS. RELATIVE HUMIDITY VALUES OVERNIGHT WILL BE IN THE 45 TO 75 PERCENT RANGE...WITH VALUES DROPPING IN THE AFTERNOON HOURS INTO THE 20 TO 30 PERCENT RANGE. && .AVIATION...SCT TSRA/SHRA COVERAGE ARE EXPECTED ACROSS SOUTHEAST ARIZONA THIS AFTERNOON AND EVENING. EXPECT BKN090CB...VRB WIND GUSTS TO 45 KTS AND BRIEF VISIBILITY REDUCTION TO UNDER 3 SM DUE TO HEAVY RAINFALL WITHIN A THUNDERSTORM OR BLOWING DUST DUE TO STRONG OUTFLOW WINDS. AVIATION DISCUSSION NOT UPDATED FOR TAF AND TWEB AMENDMENTS. && .CLIMATE...THE CONSECUTIVE DAY STREAK OF DAYTIME HIGH TEMPERATURES OF 100 OR GREATER AT THE TUCSON AIRPORT HAS REACHED 37 DAYS AS OF THURSDAY. HAVING ALREADY HIT 101 AT THE TUCSON INTERNATIONAL AIRPORT...TODAY QUALIFIES AS DAY 37. DUE TO INCREASED MOISTURE AND THUNDERSTORM ACTIVITY FRIDAY AND SATURDAY...WE ARE FORECASTING 99 FOR FRIDAY AND 97 FOR SATURDAY SO IT LOOKS LIKE TUCSON WILL FALL JUST SHORT OF TYING THE ALL-TIME RECORD OF 39 CONSECUTIVE DAYS. IN ANY EVENT...IT WILL BE ANOTHER HISTORIC RUN OF 100+ TEMPERATURES FOR TUCSON. TOP 5 LONGEST CONSECUTIVE DAY STREAKS OF HIGHS 100 DEGREES OR BETTER: 1) 39 DAYS IN 2005 (JUNE 14TH TO JULY 22ND) 39 DAYS IN 1987 (JUNE 7TH TO JULY 15TH) 3) 37 DAYS IN 2007 (JUNE 13TH TO JULY 18TH) *** 4) 33 DAYS IN 2002 (JUNE 13TH TO JULY 15TH) 5) 32 DAYS IN 1942 (JUNE 13TH TO JULY 14TH) && .PREV DISCUSSION...CURRENT SATELLITE SHOWS CLEAR SKIES OVER SE AZ THIS MORNING. WATER VAPOR IMAGERY SHOWS A PATCH OF DRY AIR STARTING TO INCH INTO EXTREME SE COCHISE COUNTY...WITH THE MUCH ADVERTISED INVERTED TROF STILL OVER WEST TEXAS. THIS FEATURE WILL CONTINUE TO INCH ITS WAY OVER TO SE AZ TODAY AND INTO TOMORROW. 12Z KTWC SOUNDING SHOWS A MORE UNSTABLE ATMOSPHERE AND LESS OF A CAP TO WORK THROUGH THAN 24 HOURS AGO. MODEL DATA SHOWS TODAY TO BE MORE ACTIVE THAN YESTERDAY. MOISTURE FROM THE AFOREMENTIONED INVERTED TROF WILL BEGIN TO MAKE ITS WAY INTO THE STATE AS WELL AS STRONG DYNAMICS WORKING INTO SE AZ BY EARLY EVENING. THIS INCREASE IN ACTIVITY WILL HOLD THROUGH FRIDAY...AS MOISTURE WILL REMAIN IN PLACE AND DYNAMICS WILL RE-EMERGE BY TOMORROW EVENING. THOUGH THIS WOULD ADVERTISE THAT THE MAIN THREAT WILL BE WET MICROBURSTS...THERE MAY ALSO BE A FLASH FLOOD THREAT. NAM HAS BEEN CONSISTENT IN PRODUCING BULLSEYES OF VERY HEAVY RAINFALL. WHILE DOUBTFUL THAT THE MODEL WILL HIT THE LOCATIONS ITS AIMING FOR...THE CONSISTENCY IS ENOUGH TO CONVINCE THAT ISOLATED LOCATIONS IN SE AZ MAY BE AT RISK FOR LOCALIZED HEAVY RAINFALL TO THE TUNE OF 3-5 INCHES. DUE TO ALL THE ACTIVITY LEADING UP TO THE WEEKEND...THERE IS THE VERY REAL PROSPECT THAT SATURDAY WILL BE A DOWN DAY. WHILE THE LINGERING CLOUDINESS WILL BE ENOUGH TO MINIMIZE THUNDER...STILL A CHANCE FOR RAIN AND EVEN ANOTHER ROUND OF LOCALIZED HEAVY RAIN. AS WITH THE PREVIOUS SHIFT...AFTER SATURDAY...WILL RUN THE STANDARD MONSOON FORECAST. WILL FINALLY START TO SEE A DOWNTURN IN DAYTIME HIGH TEMPERATURES. CURRENT FORECAST HAS TODAY AT 102...KEEPING THE STREAK ALIVE...BUT TOMORROW MAY SEE THE END. CURRENT FORECAST IS GOING WITH UPPER 90S FOR FRIDAY AND THE WEEKEND...BEFORE HITTING THE CENTURY MARK ONCE MORE AS WE ENTER INTO THE NEW WEEK. OF NOTE...KEMX RADAR IS STILL DOWN. NO ESTIMATE AS TO WHEN IT WILL BE BACK UP AND RUNNING. TECHNICIANS ARE WORKING ON THE PROBLEM. DO NOT FORESEE ANY MAJOR CHANGES TO FORECAST. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE. && SMR/GL/JRG WEATHER.GOV/TUCSON
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 620 AM MST THU JUL 19 2007 AZZ019-030-033>035-201300- NORTHERN GREENLEE COUNTY-UPPER GILA RIVER VALLEY- TUCSON METRO/MARANA/GREEN VALLEY-SANTA CRUZ COUNTY-COCHISE COUNTY- 620 AM MST THU JUL 19 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ARIZONA. .DAY ONE...TODAY AND TONIGHT HIGH PRESSURE NEAR THE FOUR CORNERS REGION WILL MAINTAIN AN EASTERLY FLOW ACROSS THE AREA. EXPECT SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP THIS AFTERNOON OVER THE HIGHER TERRAIN AND SLOWLY MOVE INTO THE VALLEYS. SOME STORMS MAY APPROACH SEVERE LIMITS LATER THIS AFTERNOON AND THIS EVENING. HEAVY RAIN IS ALSO POSSIBLE WHICH MAY CAUSE SOME LOCALIZED FLOODING PROBLEMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ029-201300- SOUTHEAST PINAL COUNTY- 620 AM MST THU JUL 19 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT HIGH PRESSURE NEAR THE FOUR CORNERS REGION WILL MAINTAIN AN EASTERLY FLOW ACROSS THE AREA. EXPECT SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP THIS AFTERNOON OVER THE HIGHER TERRAIN AND SLOWLY MOVE INTO THE VALLEY. SOME STORMS MAY APPROACH SEVERE LIMITS LATER THIS AFTERNOON AND THIS EVENING. THE STRONG GUSTY WINDS MAY PRODUCE AREAS OF BLOWING DUST WITH VISIBILITIES LESS THAN ONE MILE AT TIMES. HEAVY RAIN IS ALSO POSSIBLE WHICH MAY CAUSE SOME LOCALIZED FLOODING PROBLEMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. AZZ031-032-201300- WESTERN PIMA COUNTY-TOHONO OODHAM NATION- 620 AM MST THU JUL 19 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT ONE MORE HOT DAY ACROSS CENTRAL AND WESTERN PIMA COUNTY WITH DAYTIME TEMPERATURES IN THE 105 TO 110 RANGE. ISOLATED THUNDERSTORMS MAY ALSO DEVELOP LATER THIS AFTERNOON AND THIS EVENING. THE MAIN THREAT OF THESE STORMS WILL BE STRONG GUSTY WINDS THAT MAY APPROACH SEVERE LIMITS AND ALSO BRIEF HEAVY RAIN THAT MAY CAUSE LOCALIZED FLOODING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. AS THE UPPER HIGH REMAINS NEAR THE FOUR CORNERS REGION...EXPECT EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH A FEW APPROACHING SEVERE LIMITS. FLASH FLOODING WILL ALSO BE A THREAT EACH DAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Tucson radar (KEMX), 38 km away, was scanning. The volume nearest the first event began at 01:03 UTC.
7 thunderstorm wind, 3 dust storm, 3 hail, 1 flash flood. Local standard time, as filed.
A thunderstorm near Safford produced a strong outflow resulting in a dust storm. The visibility dropped to about 100 feet.
A large cottonwood tree was downed across State Highway 80 due to thunderstorms.
Hail 1.5 in diameter occurred in Patagonia due to an intense thunderstorm.
Several homes were flooded in the Comstock neighborhood in Benson due to flash flooding. A swift water rescue also took place at Interstate 10 and the Pomerene Road exit in Benson.
Hail 0.88 in diamter occurred in Rio Rico due to a strong thunderstorm.
A trained spotter reported an estimated wind gust to 60 mph in Green Valley. On Abrego drive in Green Valley there were two downed trees and a huge pecan tree was uprooted near the entrance to La Posada off Continental Road. In addition, five power poles were downed on Hawk Road east of Canoa Road in Green Valley.
A trained spotter estimated one inch hail near Arivaca Junction.
Strong outflow winds from a line of thunderstorms moving through the Tucson metro area dropped visibilities to less than one quarter of a mile. Visibilities were near zero as the outflow pushed through Marana.
The fire department official reported an estimated gust to 60 mph due to thunderstorms in Corona de Tucson.
An estimated gust to 60 mph was observed at the NWS office on the University of Arizona. There was a recorded gust to 69 mph on the roof of the Atmospheric Sciences building.
A tree was downed across Tanque Verde Road near the Pantano Wash.
Power lines were knocked down along Miracle Mile Strip in Tucson.
A trained spotter recorded a measured wind gust to 63 mph.
Outflow from thunderstorms in the Tucson area pushed northwest into Southeast Pinal County causing reduced visibilities due to blowing dust. Visibilities were near zero along Interstate 10 between Red Rock and Eloy causing a traffic accident near Interstate 10 and Arizona 347.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2007Every state in 2007This day in weather historyWarnings in Arizona, July 2007
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: 37063, 37080, 37085, 37077, 37089, 37094, 37090, 37070, 37095, 37099, 37092, 37093, 37104, 37074.