2 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 Sep 18, 2:20 PM MST, 1 hour 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 220 PM MST SAT SEP 18 2004 SOUTHEAST ARIZONA FORECAST DISCUSSION .SYNOPSIS...A TROUGH OF LOW PRESSURE WILL DEEPEN OVER THE WESTERN STATES THIS WEEKEND... DRAWING MOISTURE UP FROM A DECAYING TROPICAL SYSTEM. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS WILL CONTINUE THROUGH TONIGHT AND INCREASE IN COVERAGE AND INTENSITY BY SUNDAY WITH HEAVY RAIN POSSIBLE. SHOWERS WILL DIMINISH MONDAY AS DRYING TAKES PLACE BEHIND THE TROUGH ON TUESDAY. DRY CONDITIONS ARE EXPECTED THROUGH THE REMAINDER OF THE WEEK. && .DISCUSSION...BREAKS IN THE CLOUDS TODAY HAVE ALLOWED ENOUGH HEATING TO FIRE OFF MANY THUNDERSTORMS ALREADY THIS AFTERNOON ACROSS SOUTHEAST ARIZONA LEADING TO SOME SMALL STREAM FLOODING. THE MOISTURE CAUSING THESE SHOWERS AND THUNDERSTORMS IS STILL JUST MOISTURE BEING ADVECTED WELL AHEAD OF THE DISSIPATING TROPICAL CYCLONE JAVIER. WITH AMPLE MOISTURE ALREADY IN PLACE... THE TROUGH APPROACHING ARIZONA FROM THE WEST WILL PROVIDE THE DYNAMICS NEEDED TO CREATE THE POSSIBILITY OF WIDESPREAD HEAVY RAIN AND THEREFORE THE POTENTIAL FOR FLASH FLOODING. A THE FLASH FLOOD WATCH REMAINS IN EFFECT FROM 6 PM TONIGHT THROUGH 6 PM SUNDAY. BY MONDAY THE TROUGH WILL HAVE FORCED MOST OF THE MOISTURE TO THE EAST OF ARIZONA RESULTING IN LINGERING SHOWERS. THE TROUGH WILL THEN STALL OVER ARIZONA THROUGH TUESDAY... BUT WITH LITTLE MOISTURE TO WORK WITH... DRY CONDITIONS ARE EXPECTED. TROUGHINESS WILL REMAIN OVERHEAD THROUGH THE WEEK CONTINUING THE DRY CONDITIONS. && .TWC WATCHES/WARNINGS/ADVISORIES...FLASH FLOOD WATCH ALL AREAS FROM 6 PM THIS EVENING THROUGH 6 PM SUNDAY. EVANS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TUCSON AZ 700 AM MST SAT SEP 18 2004 AZZ019-029>035-191400- NORTHERN GREENLEE COUNTY-SOUTHEAST PINAL COUNTY- UPPER GILA RIVER VALLEY-WESTERN PIMA COUNTY- TOHONO OODHAM NATION-TUCSON METRO/MARANA/GREEN VALLEY- SANTA CRUZ COUNTY-COCHISE COUNTY- 700 AM MST SAT SEP 18 2004 ...FLASH FLOOD WATCH FROM 6 PM THIS EVENING UNTIL 6 PM SUNDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ARIZONA .DAY ONE...TODAY THE REMNANTS OF TROPICAL CYCLONE JAVIER WILL BE DRAWN UP THE BAJA PENINSULA AND INTO ARIZONA BY SUNDAY. WITH THE MOISTURE INCREASE AHEAD OF THIS SYSTEM...SHOWERS AND THUNDERSTORMS WILL BEGIN TO DEVELOP TODAY. LOCALLY HEAVY RAINFALL IS POSSIBLE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY AS THE CORE REMNANT OF THE TROPICAL CYCLONE NEARS...SHOWERS AND THUNDERSTORMS WILL INCREASE TONIGHT AND SUNDAY WITH RAIN BECOMING LIKELY. DUE TO THE TROPICAL NATURE OF THE APPROACHING MOISTURE...AREAS OF HEAVY RAINFALL ARE EXPECTED. WIDESPREAD RAINFALL TOTALS EXPECTED FOR THIS EVENT WILL RANGE FROM ONE HALF OF AN INCH TO NEAR ONE AND ONE HALF INCHES AT LOWER ELEVATIONS. RAINFALL AMOUNTS OF ONE TO TWO INCHES WITH LOCALLY HIGHER AMOUNTS ARE EXPECTED TO OCCUR IN UPSLOPE AREAS NEAR MOUNTAINS. SHOWERS WILL DECREASE MONDAY WITH DRY WEATHER MOVING BACK IN BEHIND THE SYSTEM BY TUESDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MEYER
The Tucson radar (KEMX), 112 km away, was scanning. The volume nearest the first event began at 22:50 UTC.
2 flash flood. Local standard time, as filed.
Bear Canyon Road just north of Tanque Verde Road was impassible due to high flowing water.
Law Enforcement reported that several washes were overflowing near milepost 21 and 22 of Indian Route 15.
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, September 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: 5424846, 5424847.