1 thunderstorm wind, as filed by the National Weather Service.
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 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, 1:40 PM MST, 2 hours 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 140 PM MST MON JUL 19 2004 SOUTHEAST ARIZONA FORECAST DISCUSSION .SYNOPSIS...HIGH PRESSURE ALOFT WILL BECOME CENTERED OVER WESTERN NEW MEXICO AND EASTERN ARIZONA...PROVIDING A DECREASED CHANCE OF THUNDERSTORMS THROUGH THE MIDDLE OF THE WEEK. THE UPPER HIGH WILL MOVE TOWARD NORTHERN ARIZONA BY THE END OF THE WEEK AND INTO THE WEEKEND...WITH AN INCREASE IN MOISTURE AND THUNDERSTORMS. && .DISCUSSION...INITIAL THUNDERSTORM DEVELOPMENT SO FAR HAD BEEN IN THE MOUNTAINS ACROSS SANTA CRUZ INTO SWRN COCHISE...ALONG WITH A FEW ALONG THE TOPS OF THE BABOQUIVARI RANGE IN CNTRL PIMA COUNTY. NOT TOO MUCH ACTIVITY OUT EAST EXCEPT IN THE WHITE MOUNTAINS AND CHIRICAHUA RANGE. IN GENERAL...IT LOOKED LIKE ISOLATED POP VALUES WILL WORK FOR THIS EVENING. SEE LATEST PHXHWOTWC OR WMO HEADER FLUS45 FOR SHORT-TERM THINKING ON STORMS. THE MODELS CONTINUED TO SHOW THE MID-LEVEL ANTICYCLONE CENTERED OVER SERN AZ/SWRN NM SHIFTING NWD AS THE WEEK GOES ON. GFS MODEL LIFTS THE HIGH CIRCULATION TO NEAR THE FOUR CORNERS AREA AROUND WEDNESDAY THEN GRADUALLY MOVES IT OVER NCNTRL AZ INTO SRN NV BY MID NEXT WEEK. THIS NORTHWARD SHIFT IN THE CENTER OF THE HIGH SHOULD LEAD TO AN OVERALL BETTER FLOW PATTERN FOR AN INCREASE IN THUNDERSTORM COVERAGE. GFS ALSO WAS SHOWING A FAIRLY STRONG INVERTED TROUGH MOVING THROUGH MEXICO LATE WEDNESDAY INTO FRIDAY WHICH WILL LIKELY ENHANCE THE THUNDERSTORM CHANCES FRIDAY INTO THE WEEKEND. HIGH TEMPERATURES WILL REMAIN ABOVE NORMAL THE NEXT FEW DAYS...THEN LOWER NEAR NORMAL FRIDAY INTO EARLY NEXT WEEK AS THE HIGH CENTER SHIFTS NORTH. && .TWC WATCHES/WARNINGS/ADVISORIES...NONE.
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 1210 PM MST MON JUL 19 2004 AZZ019-029>035-200700- NORTHERN GREENLEE COUNTY-UPPER GILA RIVER VALLEY-COCHISE COUNTY-SOUTHEAST PINAL COUNTY-TUCSON METRO/MARANA/GREEN VALLEY-SANTA CRUZ COUNTY-TOHONO OODHAM NATION-WESTERN PIMA COUNTY- 1210 PM MST MON JUL 19 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ARIZONA .DAY ONE...TODAY SYNOPSIS...A NORMAL TO SLIGHTLY BELOW NORMAL THREAT FOR HEAVY RAINFALL AND STRONG DOWNBURST WILL EXIST TODAY FROM TUCSON WEST... WHERE THE ATMOSPHERE IS MORE UNSTABLE AND AMPLE LOW LEVEL MOISTURE RESIDES. THE DRY AND MORE STABLE ATMOSPHERE TO THE EAST OF TUCSON WILL INHIBIT DEEP CONVECTION TODAY...AND THUS RESULT IN A LOW PROBABILITY FOR HEAVY RAINFALL AND STRONG DOWNBURST WINDS. DISCUSSION...NO MAJOR DISTURBANCES ROTATING THROUGH SOUTHEAST ARIZONA AS THE UPPER HIGH CENTER WAS LOCATED OVER THE SOUTHERN ARIZONA AND NEW MEXICO BORDER. A VERY WEAK DISTURBANCE...INITIATING FROM CONVECTION IN SOUTHERN SONORA MEXICO LAST NIGHT...WILL SHIFT NORTHWARD ON THE WESTERN PERIPHERY OF THE HIGH INTO SOUTHWEST/SOUTH CENTRAL ARIZONA TODAY...BUT WILL HAVE VERY LITTLE IMPACT ON THUNDERSTORM ACTIVITY. THE MORNING UPPER AIR SOUNDING FROM TUCSON INDICATED A WEAK MIXED...AND RATHER DRY MOUNTAIN BOUNDARY LAYER JUST ABOVE 730 MB. IN ADDITION...AN INVERSION/WARM AIR ALOFT WAS ALSO NOTED NEAR 500 MB. THESE ENVIRONMENTAL CONDITIONS WOULD SUGGEST THAT INITIAL BUILDUPS OVER THE MOUNTAINS WOULD BE DELAYED UNTIL THIS AFTERNOON...AND WOULD INITIALLY SHOW THIN WEAK CONVECTIVE COLUMNS AT FIRST. THE GOES-10 PRECIPITABLE WATER IMAGERY INDICATED THE THE EAST WAS QUITE DRY IN THE MID-LEVELS...WITH MOIST AIR STILL REMAINING IN THE WESTERN DESERTS...MAINLY FROM TUCSON WEST. EXPECT TO SEE MOUNTAIN CONVECTION BEGIN TO OCCUR SOUTH OF TUCSON LATER THIS AFTERNOON...THEN MOVE NORTH AT 10 TO 15 MPH INTO THE VALLEYS BY LATE AFTERNOON AND EARLY EVENING. SINCE THE MORNING UPPER AIR SOUNDING IN TUCSON DID INDICATE SOME INSTABILITY IN THE VALLEYS...THUNDERSTORMS SHOULD BE ABLE TO SUSTAIN THEMSELVES. THE DRY AND MORE STABLE ATMOSPHERE TO THE EAST OF TUCSON WILL INHIBIT DEEP CONVECTION TODAY...AND THUS RESULT IN A LOW PROBABILITY FOR HEAVY RAINFALL AND STRONG DOWNBURST WINDS. HOWEVER...FROM TUCSON WEST...WHERE THE LOW LEVEL MOISTURE IS MORE PREVALENT...THERE IS A LOW TO NORMAL PROBABILITY FOR HEAVY DOWNPOURS AND STRONG DOWNBURST WINDS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SUNDAY. THE UPPER HIGH CENTER WILL DRIFT FURTHER NORTH AND NORTHWEST BEGINNING MID-WEEK. THIS WILL ALLOW A MORE FAVORABLE MOIST FLOW TO RETURN TO SOUTHEAST ARIZONA. THEREFORE...EXPECT THUNDERSTORM ACTIVITY TO INCREASE THE SECOND HALF OF THE WORK WEEK INTO THIS WEEKEND. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Tucson radar (KEMX), 52 km away, was scanning. The volume nearest the first event began at 23:00 UTC.
1 thunderstorm wind. Local standard time, as filed.
Fire department reported that roofing had been blown off of a building and a power pole was downed near the intersection of Silverbell and El Camino Del Cerro.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2004Every state in 2004This day in weather historyWarnings in Arizona, July 2004
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: 5415719.