An amplified ridge of high pressure advanced eastward across the western United States during the middle part of the month, causing temperatures to climb above normal across the Phoenix area. The warmest day during this time period occurred on the 16th when Phoenix Sky Harbor recorded a high temperature of 107 degrees.
Every event with a place to put it; 4 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 episode as NWS PSR wrote it up.
An amplified ridge of high pressure advanced eastward across the western United States during the middle part of the month, causing temperatures to climb above normal across the Phoenix area. The warmest day during this time period occurred on the 16th when Phoenix Sky Harbor recorded a high temperature of 107 degrees. According to the Maricopa County Department of Public Health, 5 heat-associated fatalities occurred during this time.
The national radar mosaic for the moment the first event began.
4 heat. Local standard time, as filed.
Two direct fatalities were reported by the Maricopa County Department of Public Health, with their details, such as age, gender, circumstances, and exact location unavailable.
One direct fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender, circumstances, and exact location unavailable.
One indirect fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender, circumstances, and exact location unavailable.
One indirect fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender, circumstances, and exact location unavailable.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Heat, North Phoenix/Glendale | 2023-09-16 | Unknown | Direct | ||
| Heat, North Phoenix/Glendale | 2023-09-16 | Unknown | Direct | ||
| Heat, Central Phoenix | 2023-09-17 | Unknown | Direct | ||
| Heat, Central Phoenix | 2023-09-18 | Unknown | Indirect | ||
| Heat, East Valley | 2023-09-18 | Unknown | Indirect |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2023Every state in 2023This day in weather historyWarnings in Arizona, September 2023
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 2026-10-01. Each event’s entry at NCEI: 1215390, 1215391, 1215392, 1215393.