1 flash flood, 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 23, 9:45 AM MST, 5 hours 5 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
945 AM MST SAT AUG 23 2003
.SYNOPSIS...HIGH PRESSURE CENTERED NORTHEAST OF ARIZONA WILL
CONTINUE TO CIRCULATE MOISTURE OVER THE NORTHERN ARIZONA. AFTERNOON
AND EVENING SHOWERS AND THUNDERSTORMS WILL CONTINUE EACH DAY THROUGH
THIS WEEKEND...AND INTO NEXT WEEK.
.DISCUSSION...VERY MOIST AND UNSTABLE AIRMASS ACROSS THE REGION
TODAY IN THE WAKE OF YESTERDAYS CONVECTION...AND A HUGE EVENING
COMPLEX IN NORTHERN SONORA. MOISTURE DISTRIBUTION MORE HOMOGENEOUS
THAN FRIDAY...THE EASTERN ZONES HAVE MOISTENED UP CONSIDERABLY.
ONLY FEATURE TO KEY IN ON IS ONE LAST S/WV EJECTING THROUGH THE
GREAT BASIN. MINOR JET STREAK ASSOCIATED WITH THIS LEAVES CENTRAL
AND NORTH CENTRAL ARIZONA IN MODEST DIVERGENCE THIS AFTERNOON AND
EVENING...AND THIS WILL LIKELY BE ENOUGH TO KICK OFF SIGNIFICANT
CONVECTION. DUE TO THE RAINFALL EVENTS FROM FRIDAY...WE WILL ISSUE
ANOTHER FLASH FLOOD WATCH FOR YAVAPAI/COCONINO COUNTIES TODAY
THROUGH THIS EVENING. MOISTURE REMAINS SUNDAY AND MONDAY WITH THE
POSSIBLE AID OF AN EASTERLY WAVE NEAR THE BIG BEND. HIGH POPS WILL
CONTINUE. PETERSON.
.FGZ...FFA YAVAPAI/COCONINO COUNTIES 10 AM MST UNTIL 11 PM MST.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES HI/LO PROBABILITY OF PRECIP
TDY TON SUN MON TDY TON SUN MON
FLAGSTAFF 078/051 075/049 074/050 040 030 050 030 050 030
WINSLOW 092/064 089/063 088/064 040 030 040 020 040 020
PRESCOTT 084/060 081/060 080/061 040 030 050 030 050 030
PAGE 094/067 091/066 090/067 020 010 030 020 030 020
WINDOW ROCK 086/054 083/053 082/054 040 030 050 030 040 030
CANYON DE CHELLY 090/062 087/061 086/062 040 030 050 030 040 030
COTTONWOOD 098/068 095/068 094/069 030 020 030 020 040 030
GRAND CANYON 082/051 079/049 078/050 030 020 050 030 040 030
GREER 075/048 072/046 071/047 050 040 050 040 050 040
HEBER 083/053 080/051 079/052 050 040 050 030 050 030
JACOB LAKE 076/051 073/049 072/050 040 030 050 030 050 030
NAVAJO N.M. 088/059 085/058 084/059 030 020 050 030 040 030
PAYSON 091/061 088/061 087/062 040 030 040 030 040 030
SEDONA 096/066 093/066 092/067 040 030 040 030 040 030
SELIGMAN 087/059 084/059 083/060 040 030 050 030 050 030
SHOW LOW 086/059 083/057 082/058 050 040 050 040 050 030
ST. JOHNS 089/059 086/058 085/059 050 040 050 030 050 030
WUPATKI N.M. 094/065 091/064 090/065 030 020 040 030 040 030AZZ004>018-037>040-240200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1000 AM MST SAT AUG 23 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY ...FLASH FLOOD WATCH FOR ALL OF COCONINO AND YAVAPAI COUNTIES FROM 10 AM MST UNTIL 11 PM MST TODAY... A VERY MOIST AND UNSTABLE AIRMASS EXISTS ACROSS MUCH OF THE REGION TODAY. SHOWERS AND THUNDERSTORMS HAVE ALREADY DEVELOPED THIS MORNING NORTH OF FLAGSTAFF...AND NEAR PRESCOTT. STRONG THUNDERSTORMS ARE AGAIN EXPECTED TO DEVELOP BY THIS AFTERNOON...ESPECIALLY OVER PORTIONS OF COCONINO AND YAVAPAI COUNTIES. MORE ISOLATED STRONG STORMS WILL ALSO DEVELOP THIS AFTERNOON OVER THE REMAINDER OF THE AREA. STRONG STORM DEVELOPMENT OVER YAVAPAI AND COCONINO COUNTIES WILL LEAD TO MORE HEAVY RAIN OVER PREVIOUSLY SATURATED AND FLOODED AREAS. A FLASH FLOOD WATCH HAS BEEN ISSUED FOR ALL OF YAVAPAI AND COCONINO COUNTIES THROUGH 11 PM MST TONIGHT. STRONGER STORMS OUTSIDE THE FLASH FLOOD WATCH AREA MAY ALSO LEAD TO INCREASED FLOW IN WASHES AND DRY CREEK BEDS. HOWEVER...THE CHANCES FOR DAMAGING FLASH FLOODING ARE MUCH LESS. ISOLATED SEVERE THUNDERSTORMS ARE ALSO POSSIBLE TODAY OVER MUCH OF THE AREA. ASIDE FROM HEAVY RAIN...THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE HAIL SIZES OF AROUND AN INCH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A MOIST AND UNSTABLE AIR MASS WILL REMAIN OVER ARIZONA RESULTING IN A CHANCE OF SHOWERS AND THUNDERSTORMS EACH DAY. FLOODING POTENTIAL OVER THE WEEKEND WILL REMAIN MODERATE OVER YAVAPAI AND COCONINO COUNTIES. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. DEFINITION OF HAZARDOUS WEATHER...A WEATHER EVENT POSING A THREAT TO LIFE AND PROPERTY.
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
A flash flood washed over Highway 96 about 15 miles southeast of Bagdad. The flood covered the roadway with debris and caused a boulder the size of a pickup truck to topple onto the road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2003Every state in 2003This day in weather historyWarnings in Arizona, August 2003
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: 5374316.