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 Sep 1, 2:30 PM MST, 2 hours 5 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
230 PM MST MON SEP 01 2003
.SYNOPSIS.. A SOUTHEAST FLOW ALOFT WILL KEEP THE AIR MASS OVER
NORTHERN ARIZONA MOIST AND UNSTABLE THIS WEEK. AS A RESULT...LOOK
FOR SHOWERS AND THUNDERSTORMS TO DEVELOP EACH DAY.
.DISCUSSION...THUNDERSTORMS THIS AFTERNOON HAVE DEVELOPED ALONG A
CONVERGENCE ZONE FROM THE MOGOLLON RIM TO THE WHITES. ISOLATED STORMS
OVER YAVAPAI COUNTY AND THE COCONINO PLATEAU. SPOTTERS REPORT LARGE
HAIL AND HEAVY DOWNPOURS WITH A FEW OF THESE STORMS.
UPPER LEVEL HIGH PRESSURE SYSTEM TO REMAIN OVER AZ THIS WEEK. SE-S
CIRCULATION AROUND THE HIGH TO KEEP MOIST FLOW INTO THE STATE. MESO-
ETA SHOWS PLENTY OF MID LEVEL MOISTURE TO WORK WITH. EXPECT STORMS
EACH DAY...ESPECIALLY FROM THE RIM SOUTH AND WEST. DEVELOPMENT AIDED
BY INVERTED TROUGH OVER BAJA WHICH LIFTS NORTHWARD INTO AZ LATE TUE
AND WED. THIS WILL BRING INCREASED PW AND CORRESPONDING UPSWING IN
SHOWER AND THUNDERSTORM ACTIVITY. HAVE RAISED POPS ACCORDINGLY.
EXTENDED...HIGH PRESSURE OVER THE DESERT SW BEGINS TO WEAKEN BY THE
WEEKEND. APPROACHING EPAC S/WV TROF BRINGS A DRIER WESTERLY FLOW INTO
THE STATE EARLY NEXT WEEK. IF TRUE WILL SEE A DRYING AND COOLING
TREND. DF
.FGZ...NONE.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES LO/HI PROBABILITY OF PRECIP
TON TUE WED THU TON TUE WED THU
FLAGSTAFF 049/081 050/080 051/079 020 040 030 040 020 040
WINSLOW 060/092 061/092 062/091 020 010 010 010 020 030
PRESCOTT 060/087 061/087 062/086 020 030 020 030 020 030
PAGE 066/093 067/091 068/090 010 010 000 010 020 030
WINDOW ROCK 048/083 048/082 049/081 020 020 020 030 020 030
CANYON DE CHELLY 056/089 056/088 057/087 010 010 010 020 020 030
COTTONWOOD 068/101 068/100 070/099 020 030 020 030 020 030
GRAND CANYON 049/082 050/081 051/080 020 030 020 030 020 030
GREER 046/076 047/075 048/074 020 040 030 040 020 040
HEBER 051/086 052/085 053/084 020 040 030 040 020 040
JACOB LAKE 051/081 052/080 053/079 010 020 020 020 020 030
NAVAJO N.M. 053/082 054/081 055/081 020 010 010 020 020 030
PAYSON 060/092 061/091 062/090 010 030 030 030 020 030
SEDONA 065/096 066/095 067/094 010 040 030 030 020 040
SELIGMAN 056/090 057/089 058/088 010 030 030 020 020 030
SHOW LOW 057/086 057/085 058/084 020 040 030 030 020 040
ST. JOHNS 061/093 061/092 062/090 020 030 020 020 020 040
WUPATKI N.M. 061/094 062/094 063/093 020 020 010 020 020 030AZZ004>018-037>040-020200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 935 AM MST MON SEP 1 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY SOUTHERLY FLOW ALOFT IS INCREASING THE MOISTURE OVER NORTHERN ARIZONA. THE POTENTIAL FOR THUNDERSTORMS TODAY IS MAINLY OVER THE MOGOLLON RIM ...THE WHITE MOUNTAINS AND YAVAPAI COUNTY. LOOK FOR THE STORMS TO DEVELOP BY LATE MORNING AND CONTINUE INTO EARLY THIS EVENING. A FEW STORMS MAY PRODUCE HEAVY RAINS AND HAIL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY MOISTURE WILL REMAIN OVER THE REGION THROUGH THE PERIOD. THUNDERSTORMS ARE EXPECTED TO DEVELOP EACH DAY. .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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
0202 PM MST MON SEP 01 2003
TIME(MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1145 AM DONEY PARK AZ 0.75 IN HAIL
09/01/03 COCONINO
1230 PM 10 NW FLAGSTAFF AZ 1.00 IN HAIL
09/01/03 COCONINO
DFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
0318 PM MST MON SEP 01 2003
TIME(MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0315 PM SEDONA AZ 0.88 IN HAIL
09/01/03 YAVAPAI
DFThe Flagstaff radar (KFSX), 150 km away, was scanning. The volume nearest the first event began at 23:32 UTC.
1 flash flood. Local standard time, as filed.
Flash flooding covered State Highway 87 with 5 feet of water about 17 miles northeast of Clints Well.
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, September 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: 5337050.