1 lightning, as filed by the National Weather Service.
Every event with a place to put it; 1 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 Flagstaff, AZ wrote its last area forecast discussion before the first event at Aug 18, 3:20 PM MST, 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 320 PM MST WED AUG 18 2004 .SYNOPSIS...SHOWERS AND THUNDERSTORMS WILL SLOWLY DECREASE ACROSS THE NORTHLAND OVERNIGHT. ON THURSDAY...A WEATHER DISTURBANCE WILL MOVE ACROSS NORTHEAST ARIZONA WITH A CHANCE FOR STRONG THUNDERSTORMS. AREAL COVERAGE OF THUNDERSTORMS WILL DECREASE ELSEWHERE ON THURSDAY AS DRIER AIR FILTERS IN FROM THE NORTHWEST. A STORM SYSTEM WILL DEVELOP OVER THE WESTERN U.S. BY THE MIDDLE OF NEXT WEEK BRINGING BELOW NORMAL TEMPERATURES AND A CHANCE OF SHOWERS TO THE NORTHLAND. && .DISCUSSION...WILL KEEP THIS BRIEF AS NUMEROUS SEVERE THUNDERSTORMS AND FLOODING RAINS CONTINUE FROM THE RIM SOUTHWARD. HAVE BUMPED POPS UP THROUGH MIDNIGHT ALONG AND SOUTH OF THE RIM AS WE ARE BEING INFLUENCED BY A SHORTWAVE PASSING TO OUR WEST. THERE IS ANOTHER SHORTWAVE THAT WILL PASS THROUGH THE NORTHEAST SECTIONS TONIGHT AND THURSDAY...KEEPING POPS IN THE 30-40 PERCENT RANGE. STILL LOOKING FOR A DRYING TREND TO BEGIN FRIDAY AND CONTINUE INTO THE WEEKEND. && .FGZ WATCHES/WARNINGS/ADVISORIES...NONE. && JOHNDROW
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1000 AM MST WED AUG 18 2004 AZZ004>018-037>040-191400- WESTERN MOGOLLON RIM-GRAND CANYON COUNTRY-YAVAPAI COUNTY MOUNTAINS- YAVAPAI COUNTY VALLEYS AND BASINS-OAK CREEK AND SYCAMORE CANYONS- MARBLE AND GLEN CANYONS-KAIBAB PLATEAU-COCONINO PLATEAU- NORTHEAST PLATEAU AND MESAS HWY 264 NORTHWARD- NORTHEAST PLATEAU AND MESAS SOUTH OF HWY 264- CHINLE VALLEY-CHUSKA MOUNTAINS AND DEFIANCE PLATEAU- BLACK MESA AREA-LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- EASTERN MOGOLLON RIM-WHITE MOUNTAINS-NORTHERN GILA COUNTY- 1000 AM MST WED AUG 18 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY THE AIRMASS ACROSS NORTHERN ARIZONA REMAINS UNSTABLE THIS MORNING. AS A RESULT...EXPECT SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP OVER THE HIGHER TERRAIN AFTER 11 AM MST. STORMS WILL MOVE INTO THE VALLEY LOCATIONS DURING THE AFTERNOON. A FEW OF THE STORMS TODAY WILL HAVE HAIL NEAR ONE HALF INCH IN DIAMETER AND VERY HEAVY RAIN. THERE IS ALSO A THREAT OF TRAINING STORMS OVER YAVAPAI COUNTY THIS AFTERNOON WITH HEAVY RAINFALL AND LOCALIZED FLOODING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A WEATHER DISTURBANCE WILL MOVE ACROSS NORTHERN NAVAJO AND APACHE COUNTIES THURSDAY. THIS WILL ENHANCE THUNDERSTORM CHANCES IN THIS AREA...WITH A THREAT FOR A FEW SEVERE STORMS IN THE AFTERNOON. AREAL COVERAGE OF THUNDERSTORMS IS EXPECTED TO DECREASE ELSEWHERE ON THURSDAY. THE FLOW ALOFT WILL TURN TO A DRIER WESTERLY DIRECTION FOR FRIDAY THROUGH THE WEEKEND. ISOLATED THUNDERSTORMS ARE STILL POSSIBLE DURING THIS TIME BUT MOST LOCATIONS WILL REMAIN DRY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The Flagstaff radar (KFSX), 124 km away, was scanning. The volume nearest the first event began at 23:02 UTC.
1 lightning. Local standard time, as filed.
Lightning struck a house in Lake Montezuma area. The resulting fire, roof collapse, and firefighting water caused a total loss of the manufactured home.
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, August 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: 5419991.