1 thunderstorm wind, 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 Phoenix, AZ wrote its last area forecast discussion before the first event at Aug 13, 4:16 PM MST, 3 hours 39 minutes earlier.
AZZ020>028-CAZ030>033-140545- SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PHOENIX AZ 315 PM MST WED AUG 13 2003 .SYNOPSIS... STRONG HIGH PRESSURE RESPONSIBLE FOR NEAR RECORD HEAT IS DEPARTING TO THE NORTHEAST...AS A LARGE TEXAS LOW PRESSURE SYSTEM APPROACHES FROM THE EAST. MOISTURE AHEAD OF THIS SYSTEM MEANS SCATTERED SHOWERS AND THUNDERSTORMS IN SOUTH-CENTRAL ARIZONA TONIGHT WITH AN INCREASING CHANCE OF SHOWERS AND THUNDERSTORMS SPREADING WEST LATE TONIGHT AND THURSDAY...ALONG WITH COOLER WEATHER...LINGERING FRIDAY. SOME THUNDERSTORMS WILL PRODUCE STRONG GUSTY DAMAGING WINDS AND LOCALLY HEAVY RAIN. HIGH PRESSURE WILL BEGIN TO BUILD WITH A SLOW RECOVERY OF TEMPERATURES AND LESS THUNDERSTORMS LATE SUNDAY AND EARLY NEXT WEEK. .DISCUSSION... DESPITE LOWER LEVELS OF THE ATMOSPHERE BEING A FEW DEGREES COOLER AND MORE MOIST EARLY THIS MORNING COMPARED WITH THE SAME TIME YESTERDAY...MID AFTERNOON TEMPERATURES WERE GENERALLY 2 TO 4 DEGREES WARMER TODAY COMPARED WITH YESTERDAY. THE LOW PRESSURE SYSTEM THAT WAS MOVING SLOWLY WEST OVER TEXAS TODAY IS EXPECTED TO REACH SOUTHWEST TEXAS BY EARLY THURSDAY AND ARIZONA FRIDAY. HOWEVER...THE FLOW ALOFT OVER SOUTH-CENTRAL ARIZONA IS ALREADY OUT OF THE NORTHEAST. THIS WILL ALLOW THUNDERSTORMS THAT DEVELOP OVER THE HIGHER TERRAIN TO DEVELOP SOUTHWEST INTO THE SOUTH-CENTRAL DESERT AREAS INCLUDING THE GREATER PHOENIX AREA TONIGHT. SOME OF THESE THUNDERSTORMS WILL BE SEVERE WITH STRONG GUSTY DAMAGING WINDS...AND LOCALLY HEAVY RAIN. AS THE LOW CONTINUES MOVING WEST...EXPECT THE CHANCE OF SHOWERS AND THUNDERSTORMS TO SPREAD FURTHER WEST TO SOUTHWEST ARIZONA LATE TONIGHT AND THURSDAY AND SOUTHEAST CALIFORNIA THURSDAY AND THURSDAY NIGHT. WITH THE LOW PRESSURE CONTINUING TO LINGER...THE CHANCE OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO CONTINUE THROUGH FRIDAY...AND TO A LESSER EXTENT SATURDAY. THE LOW PRESSURE SYSTEM IS EXPECTED TO MOVE NORTH BY LATE SUNDAY AND EARLY NEXT WEEK. AT THE SAME TIME...HIGH PRESSURE WILL BEGIN TO BUILD WITH A SLOW RECOVERY OF TEMPERATURES AND LESS THUNDERSTORMS LATE SUNDAY AND EARLY NEXT WEEK. .PSR...NONE. ELLIS
AZZ020>028-CAZ030>033-140100- HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE PHOENIX AZ 915 AM MST WED AUG 13 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWEST AND SOUTH-CENTRAL ARIZONA...AND SOUTHEAST CALIFORNIA. .DAY ONE...TODAY THERE IS AN INCREASING CHANCE OF SHOWERS AND THUNDERSTORMS IN SOUTH-CENTRAL ARIZONA TONIGHT. STRONG GUSTY POSSIBLY DAMAGING WINDS ...DENSE BLOWING DUST WITH REDUCED VISIBILITY...AND LOCALLY HEAVY RAIN ARE EXPECTED WITH SOME STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SHOWERS AND THUNDERSTORMS ARE EXPECTED TO SPREAD WEST INTO SOUTHWEST ARIZONA AND PORTIONS OF SOUTHEAST CALIFORNIA THURSDAY AFTERNOON AND EVENING. THE GREATEST THREAT WITH THESE STORMS IS HEAVY RAIN. HOWEVER...STRONG GUSTY POSSIBLY DAMAGING WINDS ARE ALSO POSSIBLE... ALONG WITH DENSE BLOWING DUST AND SAND WITH REDUCED VISIBILITY. THE CHANCE OF SHOWERS AND THUNDERSTORMS WILL CONTINUE FRIDAY...THEN DIMINISH THIS WEEKEND. .INSTRUCTIONS TO SPOTTERS... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. ELLIS
The Phoenix radar (KIWA), 53 km away, was scanning. The volume nearest the first event began at 02:52 UTC.
1 thunderstorm wind. Local standard time, as filed.
Microburst winds damaged a trailer after being blown about 100 feet.
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: 5374724.