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 31, 2:15 PM MST, 3 hours 45 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
215 PM MST THU JUL 31 2003
.SYNOPSIS...THE ATMOSPHERE WILL REMAIN MOIST AND UNSTABLE INTO THE
EARLY PART OF NEXT WEEK. LOOK FOR DAILY SHOWER AND THUNDERSTORM
ACTIVITY TO CONTINUE...AND FOR TEMPERATURES TO REMAIN NEAR NORMAL
VALUES.
.DISCUSSION...CONVECTION SLOW STARTING TODAY IN THE RAIN COOLED
AIRMASS FROM LAST NIGHT...BUT WE ARE GETTING UNDERWAY NOW. EXPECT AN
ACTIVE AFTERNOON AND EVENING...AS MENTIONED THIS MORNING...A LARGE
AREA OF INERTIAL INSTABILITY COUPLED WITH AN EASTERLY WAVE MOVING
INTO SOUTHEAST ARIZONA WILL CAUSE CONVECTION TO CONTINUE TO RAMP UP
IN THE NEXT SEVERAL HOURS. NO REAL BREAK IN STORE FRIDAY OR SATURDAY
AS A STRONG S/WV IN THE GULF OF CALIFORNIA MOVES INTO WESTERN
ARIZONA. FLASH FLOOD WATCH STILL IN EFFECT...AND WOULD NOT BE
SHOCKED TO SEE ANOTHER ONE FOR FRIDAY. A WEAK DRYING TREND WILL
START SUNDAY AND CONTINUE INTO NEXT WEEK AS WESTERLY FLOW ALOFT
DEVELOPS. DO NOT THINK WE WILL COMPLETELY SCOUR OUT...AND THE HIGH
REDEVELOPS LATE IN THE PERIOD...SO THE BREAK WILL BE SHORT-LIVED.
PETERSON.
.FGZ...FFA AZ ZONES 8/37/38/15/17 UNTIL 10 PM MST.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES LO/HI PROBABILITY OF PRECIP
TON FRI SAT SUN TON FRI SAT SUN
FLAGSTAFF 054/075 053/074 055/078 050 060 050 060 040 050
WINSLOW 063/086 063/085 064/089 040 040 040 040 030 030
PRESCOTT 058/083 058/084 060/088 050 050 040 050 040 040
PAGE 072/095 072/093 072/097 030 030 030 030 020 020
WINDOW ROCK 055/079 054/078 053/082 030 040 030 050 030 040
CANYON DE CHELLY 065/085 064/084 063/088 030 030 030 030 020 030
COTTONWOOD 066/094 066/095 068/099 040 040 030 040 030 030
GRAND CANYON 053/077 052/076 054/080 050 050 040 050 040 040
GREER 050/071 049/070 051/074 050 060 050 060 050 060
HEBER 055/080 054/079 056/083 050 060 050 060 040 050
JACOB LAKE 054/073 053/072 055/076 050 050 040 040 030 030
NAVAJO N.M. 059/079 058/078 057/082 040 040 040 040 030 040
PAYSON 059/088 059/089 061/093 040 040 040 040 030 030
SEDONA 064/092 064/093 066/097 040 040 030 040 030 030
SELIGMAN 051/086 051/087 053/091 050 050 040 040 030 030
SHOW LOW 062/081 061/080 063/084 050 060 050 060 050 060
ST. JOHNS 058/080 058/079 059/083 050 050 050 050 040 050
WUPATKI N.M. 066/088 066/087 067/091 040 040 040 040 030 030AZZ004>018-037>040-010200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1005 AM MST THU JUL 31 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY ...FLASH FLOOD WATCH FROM NOON MST UNTIL 10 PM MST FOR THE NORTHERN TWO THIRDS OF YAVAPAI COUNTY...WESTERN MOGOLLON RIM...OAK CREEK AND SYCAMORE CANYONS...AND THE WHITE MOUNTAINS... A MOISTURE RICH AIRMASS REMAINS OVER THE STATE TODAY. WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS MUCH OF THE REGION BY LATE MORNING THROUGH THE EVENING HOURS. ISOLATED THUNDERSTORMS MAY PRODUCE TORRENTIAL RAIN...ESPECIALLY OVER PORTIONS OF THE MOGOLLON RIM AND YAVAPAI COUNTY. THESE STRONGER STORMS MAY ALSO CONTAIN HAIL UP TO AN INCH IN DIAMETER...AND DANGEROUS LIGHTNING. DUE TO THE HEAVY RAIN THAT FELL IN YAVAPAI COUNTY WEDNESDAY...AS WELL AS PORTIONS OF THE MOGOLLON RIM...A FLASH FLOOD WATCH HAS BEEN ISSUED FOR THESE SAME AREAS TODAY. THUNDERSTORMS WILL DEVELOP FIRST OVER THE WHITE MOUNTAINS AND EASTERN RIM...AS WELL AS CENTRAL YAVAPAI COUNTY. DEVELOPMENT IN THESE AREAS IS EXPECTED BY 11 AM MST. STORMS WILL THEN SPREAD INTO THE REMAINING AREAS OF NORTHERN ARIZONA THROUGH THE AFTERNOON. STORM MOTION WILL BE TO THE NORTHWEST TODAY...AS WINDS HAVE SHIFTED TO THE SOUTHEAST OVERNIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY LITTLE CHANGE IS SEEN IN THE MOIST AND UNSTABLE ATMOSPHERE OVER THE REGION THROUGH THE PERIOD. THUNDERSTORMS ARE EXPECTED TO DEVELOP EACH DAY. HEAVY RAIN PRODUCING STORMS ARE LIKELY AGAIN FRIDAY AND EVEN SATURDAY...SO THE THREAT FOR FLOODING WILL REMAIN AT LEAST MODERATE. .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.
Water was flowing over Highway 77 between Shumway and Taylor. Minor street flooding was also reported between Holbrook and Snowflake.
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: 5378241.