1 lightning, 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 20, 2:35 PM MST, 7 hours 10 minutes earlier.
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
235 PM MST SUN JUL 20 2003
.SYNOPSIS...THE DAILY PATTERN OF SCATTERED SHOWERS AND THUNDERSTORMS
WILL CONTINUE INTO NEXT WEEK AS A MOIST PATTERN STAYS IN PLACE. HIGH
PRESSURE TO THE NORTH WILL KEEP SEASONABLY WARM AFTERNOON CONDITIONS
OVER MUCH OF THE STATE FOR THE NEXT SEVERAL DAYS.
.DISCUSSION...CONVECTION THIS AFTERNOON TRAPPED OVER HIGH TERRAIN
WITH MAINLY DRY OUTFLOWS PROPAGATING INTO THE LOWER ELEVATIONS.
STILL THINK SOME RAIN WILL MAKE IT INTO THE LOWER ELEVATIONS IN THE
NEXT FEW HOURS...ESPECIALLY IN GILA AND YAVAPAI COUNTIES. HAVE CUT
BACK ON THE CONVECTIVE CHANCES IN THESE AREAS...BUT STILL WELL INTO
THE SCATTERED CATEGORY. CONVECTION SHOULD END BY MIDNIGHT AND ALLOW
FOR ENOUGH CLEARING TO GET A SUNNY START MONDAY. MODELS STILL
ADVERTISING A DECENT WAVE MONDAY AFTERNOON/EVENING AND THE ZONES
HAVE CORRESPONDINGLY HIGHER POPS. FAIRLY HIGH MOISTURE VALUES AND
GENERALLY EASTERLY FLOW STAY IN PLACE AFTER MONDAY AND THROUGH THE
REMAINDER OF THE FORECAST PERIOD. THIS WILL MAKE FOR A MODERATE
GRADE MONSOON FORECAST THROUGH DAY SEVEN. PETERSON.
.FGZ...NONE.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES LO/HI PROBABILITY OF PRECIP
TON MON TUE WED TON MON TUE WED
FLAGSTAFF 058/083 057/082 055/082 030 050 040 040 030 040
WINSLOW 068/094 066/091 065/091 020 020 030 020 020 020
PRESCOTT 065/092 068/090 066/090 040 030 040 030 030 030
PAGE 078/096 075/094 075/092 020 020 030 020 020 020
WINDOW ROCK 060/086 058/084 056/085 030 050 040 040 030 040
CANYON DE CHELLY 070/092 068/090 066/091 020 030 030 020 020 020
COTTONWOOD 073/103 076/101 074/101 030 030 040 030 030 030
GRAND CANYON 057/085 056/084 054/084 030 040 030 030 030 030
GREER 054/079 053/078 051/078 030 050 040 040 030 040
HEBER 059/088 058/087 056/087 030 050 040 040 030 040
JACOB LAKE 058/081 057/080 055/080 030 040 030 030 030 030
NAVAJO N.M. 064/086 062/084 060/085 030 040 040 030 030 030
PAYSON 066/097 069/095 067/095 040 030 050 040 030 040
SEDONA 071/101 074/099 072/099 030 030 040 030 030 030
SELIGMAN 058/095 061/093 059/093 040 030 040 030 030 030
SHOW LOW 066/089 065/088 063/088 030 050 040 040 030 040
ST. JOHNS 063/088 061/085 060/085 030 040 040 030 030 030
WUPATKI N.M. 071/096 069/093 068/093 020 020 030 020 020 020AZZ004>018-037>040-210200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 925 AM MST SUN JUL 20 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO...NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY DEEP MOISTURE REMAINS OVER MUCH OF THE REGION TODAY. SCATTERED THUNDERSTORMS ARE AGAIN EXPECTED ACROSS MOST OF THE AREA FROM LATE MORNING THROUGH THE EVENING HOURS. THE FIRST CONVECTIVE ACTIVITY IS EXPECTED OVER THE MOGOLLON RIM AND WHITE MOUNTAINS...LIKELY BEFORE 10 AM MST. SHOWERS AND THUNDERSTORMS WILL THEN DEVELOP OVER THE OTHER HIGHER TERRAIN OF NORTHERN ARIZONA BY LATE MORNING AND EARLY AFTERNOON. BY THE MID-AFTERNOON HOURS...STORMS ARE EXPECTED TO MOVE SOUTHWEST INTO PORTIONS OF NORTHERN GILA AND YAVAPAI COUNTIES WHERE ACTIVITY WILL LINGER INTO THE EVENING. THE BEST THREAT FOR STRONGER STORMS TODAY WILL BE ALONG THE SOUTHERN EDGE OF THE MOGOLLON RIM/WHITE MOUNTAINS AS WELL AS NORTHERN GILA COUNTY AND YAVAPAI COUNTY. THE MAIN THREAT FROM THE THUNDERSTORMS ACTIVITY TODAY WILL BE BRIEF HEAVY DOWNPOURS...AND SMALL HAIL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY MOISTURE WILL REMAIN OVER ARIZONA THROUGH THE PERIOD FOR A CONTINUED THREAT OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. .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), 93 km away, was scanning. The volume nearest the first event began at 04:43 UTC.
1 lightning. Local standard time, as filed.
A thirty-seven year old man was struck by lightning near his boat at Lake Roosevelt.
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: 5379579.