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 30, 2:45 PM MST, 3 hours 45 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
245 PM MST WED JUL 30 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...CONVECTIVE ACTIVITY QUITE VIGOROUS TODAY ALONG THE RIM
AND IN THE EAST-CENTRAL ZONES WHERE SOLAR HEATING WAS NOT HAMPERED
BY EARLY MORNING CLOUDS. EXPECTING THIS ACTIVITY TO CONTINUE INTO
THE EVENING WITH A SLOW DECREASE OVERNIGHT AS AIRMASS REMAINS VERY
UNSTABLE AND NEARLY MOIST ADIABATIC. FLOW BEGINS TO SHIFT TO THE
SOUTHEAST OVERNIGHT AND INTO THURSDAY AND FRIDAY. THIS WILL FOCUS
THE CONVECTION ON THE RIM AND AREAS NORTH AND NORTHWEST INSTEAD OF
AREAS WEST OF THE RIM. THIS WILL ALSO ALLOW SOME OF THE VERY DEEP
MOISTURE OVER SOUTHERN ARIZONA TO ADVECT EVEN FARTHER NORTHWARD INTO
THE WEEKEND. GFS SUGGESTING A DRYING TREND BY DAYS 6 OR 7 AS SOUTH
FLOW TURNS TO SOUTHWEST FLOW. WE ARE NOT BUYING THIS TREND YET AS
OTHER MODELS NOT ANYWHERE NEAR AS AGGRESSIVE. EVEN IF A TROUGH
DEVELOPS OVER THE WEST COAST...THIS TIME OF YEAR IT MAY LEAD TO A
SURGE OR MAKE THE ATMOSPHERE MORE BAROCLINIC. ALTHOUGH PW VALUES MAY
DECREASE...CONVECTION WOULD NOT. SO...WITH MODEL UNCERTAINTY AND
THE REASONS JUST STATED...WILL SHOW VERY LITTLE CHANGE IN THE OUT
PERIODS. PETERSON.
.FGZ...NONE.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES LO/HI PROBABILITY OF PRECIP
TON THU FRI SAT TON THU FRI SAT
FLAGSTAFF 057/078 055/080 056/080 040 050 040 050 040 040
WINSLOW 066/088 065/090 065/090 030 030 030 030 020 020
PRESCOTT 064/084 063/086 064/086 050 040 040 040 030 040
PAGE 075/095 074/096 075/096 020 020 020 030 020 020
WINDOW ROCK 062/083 059/085 059/085 030 030 030 030 020 030
CANYON DE CHELLY 072/089 069/091 069/091 030 030 030 030 030 030
COTTONWOOD 072/095 071/097 072/097 040 030 030 030 020 030
GRAND CANYON 056/080 054/082 055/082 040 050 040 050 040 040
GREER 053/074 051/076 052/076 050 050 040 050 040 040
HEBER 058/083 056/085 057/085 040 050 040 050 040 040
JACOB LAKE 057/076 055/078 056/078 040 040 040 050 040 040
NAVAJO N.M. 066/083 063/085 063/085 030 030 030 040 030 030
PAYSON 065/089 064/091 065/091 040 040 030 040 030 030
SEDONA 070/093 069/095 070/095 040 030 030 030 020 030
SELIGMAN 057/087 056/089 057/089 050 040 040 040 030 030
SHOW LOW 065/084 063/086 064/086 050 050 040 050 040 040
ST. JOHNS 061/082 060/084 060/084 040 040 040 040 040 040
WUPATKI N.M. 069/090 068/092 068/092 030 030 030 030 020 020AZZ004>018-037>040-310200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 935 AM MST WED JUL 30 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY A MOISTURE RICH AIRMASS REMAINS OVER THE STATE TODAY. SCATTERED SHOWERS AND THUNDERSTORMS ARE ALREADY IN PROGRESS ACROSS NORTHERN SECTIONS OF THE STATE...WITH MORE DEVELOPMENT EXPECTED OVER SOUTHERN AND CENTRAL SECTIONS LATER THIS MORNING. STRONG THUNDERSTORMS ARE EXPECTED BY EARLY AFTERNOON MAINLY ALONG THE WESTERN EDGE OF THE MOGOLLON RIM AND POINTS WEST IN NORTHERN GILA AND YAVAPAI COUNTIES. STORMS WILL BE MOVING TO THE WEST AT AROUND 20 MPH TODAY...SO HEAVY RAINFALL WILL BE LIMITED UNLESS MULTIPLE STORMS FORM OVER THE SAME LOCATION. MOSTLY SMALL HAIL CAN BE EXPECTED WITH THE STRONGER STORMS TODAY...ISOLATED STORMS MAY PRODUCE SEVERE HAIL. DUE TO THE FREQUENCY OF RAIN EVENTS ALONG AND WEST OF THE RIM...THE POTENTIAL FOR URBAN AND SMALL STREAM FLOODING REMAINS MODERATE TODAY. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY LITTLE CHANGE IS SEEN IN THE MOIST AND UNSTABLE ATMOSPHERE OVER THE REGION THROUGH THE PERIOD. THUNDERSTORMS ARE EXPECTED TO DEVELOP EACH DAY...ALTHOUGH WINDS BY THURSDAY AND FRIDAY WILL BE OUT OF THE SOUTHEAST...INSTEAD OF THE EAST. THIS DIRECTION WILL FAVOR MORE OF THE RIM COUNTRY NORTH TO THE GRAND CANYON...WITH LESS ACTIVITY IN YAVAPAI COUNTY. THE THREAT FOR HEAVY RAINFALL AMOUNTS AND THE POTENTIAL FOR SMALL STREAM FLOODING STILL REMAINS. .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.
Heavy rain caused flooding in the Prescott area. Several low water crossings were impassable. Willow Creek was flooding. A spotter in Chino Valley reported 0.60 inches of rain in just 15 minutes.
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: 5378239.