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 Jul 25, 2:15 AM MST, 11 hours 15 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
215 AM MST FRI JUL 25 2003
.SYNOPSIS...A MOIST AIRMASS WILL CONTINUE TO CIRCULATE AROUND HIGH
PRESSURE EAST OF ARIZONA THROUGH THE WEEKEND. THIS WILL KEEP THE
CHANCE FOR DAILY SHOWER AND THUNDERSTORM ACTIVITY IN THE FORECAST
WELL INTO NEXT WEEK. SHOWERS AND THUNDERSTORMS WILL INCREASE ACROSS
THE AREA SUNDAY AND MONDAY AS A WEAK WEATHER SYSTEM MOVES THROUGH
THE STATE. TEMPERATURES WILL REMAIN NEAR OR SLIGHTLY ABOVE NORMAL
FOR THIS TIME OF YEAR.
.DISCUSSION...TODAY AND SATURDAY WILL FEATURE MORE OF THE SAME WITH
MODERATE LEVELS OF MOISTURE CIRCULATING AROUND HIGH PRESSURE NEAR
THE 4-CORNERS. BY SATURDAY AFTERNOON...THE STEERING FLOW STARTS TO
CHANGE AS LOW PRESSURE DEVELOPS IN NORTHERN MEXICO AND THE UPPER
LEVEL HIGH RETROGRADES INTO NEVADA. AT THE SAME TIME...MODELS STILL
ADVERTISING A SIGNIFICANT EASTERLY WAVE ACROSS THE AREA BY SUNDAY
AND MONDAY. THIS SHOULD MAKE FOR A DECENT CONVECTIVE OUTBREAK AND
THE CURRENT GRIDS REFLECT THIS WITH LIKELY POPS. FLOW REMAINS
EASTERLY TO ALMOST NORTHEASTERLY AFTER THIS FEATURE GOES BY...BUT
BY THIS TIME...THE REGION IN ENTRENCHED WITH THE DEEPEST MOISTURE
SO FAR THIS SEASON. WILL CONTINUE A MODERATE GRADE MONSOON FORECAST
AFTER MONDAY THROUGH THE REMAINDER OF THE EXTENDED PERIOD.
PETERSON.
.FGZ...NONE.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES HI/LO PROBABILITY OF PRECIP
TDY TON SAT SUN TDY TON SAT SUN
FLAGSTAFF 082/056 083/057 079/054 050 030 050 030 060
WINSLOW 094/067 096/068 092/065 030 030 030 030 040
PRESCOTT 089/068 091/069 088/066 050 030 050 040 060
PAGE 097/078 098/078 093/075 030 030 020 030 040
WINDOW ROCK 088/057 090/058 086/055 040 030 040 040 060
CANYON DE CHELLY 094/067 096/068 092/065 030 020 030 020 050
COTTONWOOD 100/076 102/077 099/074 030 020 040 030 040
GRAND CANYON 084/055 085/056 081/053 050 030 040 030 060
GREER 078/052 079/053 075/050 050 030 050 040 060
HEBER 087/057 088/058 084/055 050 030 050 030 060
JACOB LAKE 080/056 081/057 077/054 050 030 040 030 060
NAVAJO N.M. 088/061 090/062 086/059 040 030 030 030 050
PAYSON 094/069 096/070 093/067 040 030 040 040 050
SEDONA 098/074 100/075 097/072 040 030 040 030 050
SELIGMAN 092/061 094/062 091/059 050 030 040 030 050
SHOW LOW 088/064 089/065 085/062 050 030 050 040 060
ST. JOHNS 088/062 090/063 086/060 030 030 030 030 050
WUPATKI N.M. 096/070 098/071 094/068 030 030 030 030 040AZZ004>018-037>040-260200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1020 AM MST FRI JUL 25 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY STRONG SHOWERS AND THUNDERSTORMS ARE EXPECTED MAINLY WEST OF FLAGSTAFF. THE COMBINATION OF STRONGER WINDS ALOFT AND MORE INSTABILITY WILL HELP THUNDERSTORM BECOME MORE ORGANIZED. THERE WILL BE A THREAT OF A FEW STORMS ABLE TO PRODUCE LARGE HAIL. THERE WILL BE A POTENTIAL FOR A FEW OF THE STRONGER STORMS IN THIS AREA TO PRODUCE LOCALLY HEAVY RAIN AS WELL. FOR THE REST OF NORTHERN ARIZONA THERE WILL BE ONLY A THREAT OF ISOLATED STRONG THUNDERSTORMS PRODUCING HAIL AND HEAVY RAINS. THUNDERSTORM DEVELOPMENT WILL OCCUR BETWEEN NOW AND 1100 AM MST. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY MOISTURE WILL REMAIN OVER ARIZONA THROUGH THE PERIOD FOR A CONTINUED THREAT OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. A WEATHER SYSTEM WILL APPROACH THE AREA SUNDAY INTO MONDAY...WITH SHOWERS AND THUNDERSTORMS INCREASING DURING THIS TIME PERIOD. THERE WILL BE AN INCREASED THREAT OF STRONG THUNDERSTORMS AND LOCALLY HEAVY RAIN SUNDAY AND MONDAY. .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 Flagstaff radar (KFSX), 150 km away, was scanning. The volume nearest the first event began at 20:28 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain caused flooding in the far western part of Coconino County. State Route 18 was flooded near Grand Canyon Caverns. A flash flood was reported moving down Diamond Creek. Several Rafting companies pulled their rafts off the Colorado River due to the storm.
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, July 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: 5378234.