1 hail, as filed by the National Weather Service.
Every event with a place to put it. 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 4, 9:00 AM MST, 5 hours earlier.
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
900 AM MST THU SEP 04 2003
.SYNOPSIS...DEEP MOISTURE WILL REMAIN ACROSS NORTHERN ARIZONA TODAY
AND FRIDAY WITH SCATTERED THUNDERSTORMS DEVELOPING EACH DAY. A
DRYING TREND WILL MOVE IN FOR THE WEEKEND AND INTO EARLY NEXT WEEK
WITH WARMING TEMPERATURES...AND ONLY ISOLATED ACTIVITY OVER THE
HIGHER TERRAIN.
.DISCUSSION...A NORTH/SOUTH RIDGE AXIS EXTENDED FROM IDAHO TO
NORTHWEST MEXICO THIS MORNING. AT THE SAME TIME A WEAK UPPER TROUGH
WAS APPROACHING THE CALIFORNIA COAST. OVER THE NEXT THREE DAYS THE
TROUGH WILL MOVE TO THE EAST WITH THE RIDGE SHIFTING SLOWLY
WESTWARD. THIS WILL CHANGE THE FLOW FROM MAINLY SOUTHWEST TODAY TO
NORTHWEST BY SATURDAY. THE MAIN IMPACT IS THAT FOR TODAY AND FRIDAY
IT WILL REMAIN MOIST WITH SCATTERED AFTERNOON AND EVENING
THUNDERSTORMS. ON SATURDAY NORTHWEST FLOW AND SINKING MOTION ALOFT
WILL BEGIN TO DRY AND STABILIZE THE AIR MASS. JUST ISOLATED STORMS
ON SATURDAY EXCEPT FOR THE EASTERN THIRD OF THE STATE. NORTHWEST FLOW
CONTINUES INTO SUNDAY WITH FURTHER DRYING. PROBABLY ONLY ISOLATED
STORMS ON SUNDAY.
FOR TODAY...MOISTURE WAS ON THE INCREASE ACROSS MUCH OF ARIZONA
ALONG AND SOUTH OF A LINE EXTENDING FROM THE GRAND
CANYON...FLAGSTAFF AND PAYSON. THIS IS DUE IN PART TO A SURGE OF
MOISTURE THAT MOVED NORTH FROM THE GULF OF CALIFORNIA OVERNIGHT.
THINK THE BEST FOCUS FOR THUNDERSTORMS TODAY WILL BE OVER THE HIGHER
TERRAIN FROM PAYSON NORTHWEST TO THE GRAND CANYON. THIS IS WHERE THE
HIGHEST INSTABILITY AND BEST LOW LEVEL CONVERGENCE WILL DEVELOP WITH
CAPE VALUES ON THE HIGH SIDE.
MCCOLLUM
.FGZ...NONE.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES HI/LO PROBABILITY OF PRECIP
TDY TON FRI SAT TDY TON FRI SAT
FLAGSTAFF 076/049 076/048 077/046 050 030 050 030 030 020
WINSLOW 090/061 090/060 091/058 030 020 040 020 020 000
PRESCOTT 084/060 084/059 085/057 040 030 040 030 020 010
PAGE 092/071 092/070 093/068 030 030 030 020 020 000
WINDOW ROCK 082/050 082/049 083/047 040 030 050 040 040 020
CANYON DE CHELLY 090/057 090/056 091/054 030 020 040 020 030 010
COTTONWOOD 097/067 097/066 098/064 030 020 040 020 020 010
GRAND CANYON 079/050 079/049 080/047 040 030 040 030 020 010
GREER 071/048 071/047 072/045 040 030 050 040 040 020
HEBER 079/052 079/051 080/049 050 030 050 040 030 020
JACOB LAKE 073/049 073/048 074/046 040 030 040 030 020 010
NAVAJO N.M. 080/056 080/055 081/053 030 030 050 030 030 020
PAYSON 088/059 088/058 089/056 040 030 040 030 020 010
SEDONA 095/066 095/065 096/063 040 030 040 030 020 010
SELIGMAN 088/058 088/057 089/055 040 030 040 020 020 010
SHOW LOW 083/053 083/052 084/050 040 030 050 040 030 020
ST. JOHNS 089/061 089/060 090/058 030 030 050 030 030 010
WUPATKI N.M. 091/063 091/062 092/060 030 030 030 020 020 010AZZ004>018-037>040-050200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1000 AM MST THU SEP 4 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY SCATTERED SHOWERS AND THUNDERSTORMS WILL FORM OVER THE HIGHER TERRAIN OF NORTHERN ARIZONA BY THE LATE IN THE MORNING BUT BE MOST NUMEROUS OVER THE MOGOLLON RIM...KAIBAB PLATEAU AND GRAND CANYON PARK AREAS. WINDS ALOFT WILL BE WEAK AND FROM THE WEST NORTHWEST. ANY STORMS THAT FORM TODAY WILL BE SLOW MOVERS WITH A GENERAL MOTION TOWARD THE SOUTHEAST AT 5 MPH. THE MAIN AREA OF FOCUS WILL BE THE AREA OF FLAGSTAFF...THE GRAND CANYON AND PRESCOTT WHERE INCREASING MOISTURE AND BRIGHT SUNSHINE WILL COMBINE TO PRODUCE A VERY UNSTABLE AIR MASS. EXPECT ISOLATED STORMS TO PRODUCE 1 INCH DIAMETER HAIL AND LOCALIZED FLOODING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .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), 116 km away, was scanning. The volume nearest the first event began at 20:58 UTC.
1 hail. Local standard time, as filed.
Pea to penny sized (1/4 to 3/4 inch diameter) hail was reported in Highland Pines west of Prescott.
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: 5337134.