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 26, 3:10 PM MST, 20 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
310 PM MST TUE AUG 26 2003
.SYNOPSIS...HIGH PRESSURE WILL CONTINUE TO BRING ABUNDANT MOISTURE
TO THE REGION...RESULTING IN A CONTINUATION OF DAILY SHOWERS AND
THUNDERSTORMS. AN INCREASE IN TROPICAL MOISTURE IS EXPECTED ACROSS
THE REGION THROUGH WEDNESDAY. THIS WILL BRING AN INCREASE IN SHOWER
AND THUNDERSTORM ACTIVITY THROUGH AT LEAST THURSDAY. A SLIGHT DRYING
TREND IS EXPECTED BY THE WEEKEND.
.DISCUSSION...VERY MOIST ATMOSPHERE PRODUCING LOTS OF FLOODING AND
SOME SEVERE WEATHER. FLASH FLOOD WATCH WILL CONTINUE AS IT HAS
VERIFIED ALREADY. MOISTURE STAYS VERY DEEP AT LEAST THROUGH THURSDAY
AND THIS DAILY PATTERN WILL CONTINUE. IT IS POSSIBLE THAT TOO MUCH
MID LEVEL MOISTURE WILL DEVELOP FROM IGNACIO AND SHUT DOWN THE
CONVECTION...BUT EVEN IN THAT SCENARIO...ENOUGH STRATIFORM SHOWERS
WILL STILL VERIFY POPS. EXTENDED PERIOD STILL LOOKS WET...BUT NOT
QUITE AS ACTIVE. POSSIBLE TROUGH DAYS 6 AND 7 COULD REALLY AMPLIFY
ACTIVITY...BUT WE WILL WAIT AND SEE. PETERSON.
.FGZ...FFA AZ ZONES 8/12/15/37/38 UNTIL 10 PM MST.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES LO/HI PROBABILITY OF PRECIP
TON WED THU FRI TON WED THU FRI
FLAGSTAFF 053/074 052/075 051/077 040 050 040 050 040 040
WINSLOW 062/084 062/086 061/088 030 040 030 030 030 030
PRESCOTT 063/079 062/080 061/082 050 050 050 050 040 040
PAGE 071/090 073/088 072/090 020 030 030 030 020 020
WINDOW ROCK 052/080 053/078 053/080 030 040 040 040 040 030
CANYON DE CHELLY 060/086 061/084 061/086 020 030 030 030 030 020
COTTONWOOD 071/090 070/091 069/093 050 040 040 040 030 030
GRAND CANYON 053/075 052/076 051/078 030 050 040 050 040 040
GREER 050/069 049/070 048/072 040 050 040 050 040 040
HEBER 055/079 054/080 053/082 040 050 040 050 040 040
JACOB LAKE 053/072 052/073 051/075 030 040 040 040 030 030
NAVAJO N.M. 057/080 058/078 058/080 030 040 040 040 040 030
PAYSON 064/083 063/084 062/086 040 040 050 040 040 040
SEDONA 069/087 068/088 067/090 040 040 040 040 030 030
SELIGMAN 056/082 055/083 054/085 050 040 040 040 030 030
SHOW LOW 061/079 060/080 059/082 030 040 030 030 030 030
ST. JOHNS 057/079 057/081 056/083 030 040 030 030 030 030
WUPATKI N.M. 063/086 063/088 062/090 030 040 030 030 030 030AZZ004>018-037>040-270200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 945 AM MST TUE AUG 26 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 SOUTHERN COCONINO COUNTY AND ALL OF YAVAPAI COUNTY FROM NOON MST UNTIL 10 PM MST TODAY... A VERY MOIST AND UNSTABLE AIRMASS REMAINS ACROSS THE REGION TODAY. LIGHT EASTERLY FLOW WILL FAVOR THUNDERSTORM DEVELOPMENT ACROSS THE HIGH TERRAIN OF CENTRAL ARIZONA BY LATE THIS MORNING. STORMS WILL DRIFT SLOWLY WESTWARD OFF THE RIM AND INTO PORTIONS OF YAVAPAI AND GILA COUNTIES LATER THIS AFTERNOON. NORTHEAST AND NORTHERN SECTIONS OF THE STATE WILL SEE ONLY ISOLATED THUNDERSTORM COVERAGE TODAY. DUE TO THE VERY MOIST ATMOSPHERIC CONDITIONS...ISOLATED STRONGER STORMS WILL PRODUCE TORRENTIAL RAIN THIS AFTERNOON. THIS IS MOST LIKELY OVER PORTIONS OF THE MOGOLLON RIM AND IN PORTIONS OF YAVAPAI COUNTY. SATURATED SOIL CONDITIONS MAY LEAD TO SOME FLOODING WITH THE STRONGEST STORMS TODAY. THESE STORMS MAY ALSO PRODUCE HAIL AND GUSTY WINDS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH LABOR DAY MOISTURE WILL INCREASE ACROSS THE STATE THROUGH THURSDAY. WIDESPREAD SHOWER AND THUNDERSTORM ACTIVITY WILL CONTINUE WEDNESDAY AND INTO THURSDAY...BEFORE SLOWLY DECREASING AGAIN BY THE WEEKEND. FREQUENT HEAVY RAIN MAY WILL MEAN THAT THE FLOODING POTENTIAL WILL REMAIN AT LEAST MODERATE THROUGH THE END OF THE WEEK. .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), 124 km away, was scanning. The volume nearest the first event began at 22:30 UTC.
1 flash flood. Local standard time, as filed.
Homes flooded in the northwest portion of Chino Valley. The water was up to the hood of a jeep that drove through the water.
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: 5374372.