Excessive Heat, Palo Verde Valley
- When
- September 9, 9:00 AM PST to September 10, 7:00 PM PST
- Where
- Palo Verde Valley forecast zone
- Reported by
- County Official
- Coordinates
- 33.392, -115.679 (the zone’s center; the record gives no point)
Excessive Heat in California, September 9 to 10, 2023
An upper level ridge of high pressure strengthened over the Desert Southwest, leading to excessive heat conditions across much of southeast California. Any heat-associated fatalities that may have occurred during this event are unknown.
Where it happened
Every event with a place to put it; 8 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 8
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.
What happened
The episode as NWS PSR wrote it up.
An upper level ridge of high pressure strengthened over the Desert Southwest, leading to excessive heat conditions across much of southeast California. Any heat-associated fatalities that may have occurred during this event are unknown.
The radar
The national radar mosaic for the moment the first event began.
Event by event
8 excessive heat. Local standard time, as filed.
Excessive Heat, Imperial County Southwest
- When
- September 9, 9:00 AM PST to September 10, 7:00 PM PST
- Where
- Imperial County Southwest forecast zone
- Reported by
- County Official
- Coordinates
- 33.040, -115.365 (the zone’s center; the record gives no point)
Excessive Heat, Salton Sea
- When
- September 9, 9:00 AM PST to September 10, 7:00 PM PST
- Where
- Salton Sea forecast zone
- Reported by
- County Official
- Coordinates
- 33.392, -115.679 (the zone’s center; the record gives no point)
Excessive Heat, Chuckwalla Mountains
- When
- September 9, 9:00 AM PST to September 10, 7:00 PM PST
- Where
- Chuckwalla Mountains forecast zone
- Reported by
- County Official
- Coordinates
- 33.392, -115.679 (the zone’s center; the record gives no point)
Excessive Heat, Imperial County Southeast
- When
- September 9, 9:00 AM PST to September 10, 7:00 PM PST
- Where
- Imperial County Southeast forecast zone
- Reported by
- County Official
- Coordinates
- 33.040, -115.365 (the zone’s center; the record gives no point)
Excessive Heat, Imperial County West
- When
- September 9, 9:00 AM PST to September 10, 7:00 PM PST
- Where
- Imperial County West forecast zone
- Reported by
- County Official
- Coordinates
- 33.040, -115.365 (the zone’s center; the record gives no point)
Excessive Heat, Imperial Valley
- When
- September 9, 9:00 AM PST to September 10, 7:00 PM PST
- Where
- Imperial Valley forecast zone
- Reported by
- County Official
- Coordinates
- 33.040, -115.365 (the zone’s center; the record gives no point)
Excessive Heat, Chuckwalla Valley
- When
- September 9, 9:00 AM PST to September 10, 7:00 PM PST
- Where
- Chuckwalla Valley forecast zone
- Reported by
- County Official
- Coordinates
- 33.744, -115.994 (the zone’s center; the record gives no point)
What these are
- Excessive Heat
- Heat at or above the local excessive heat warning criteria, or heat that caused deaths.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Excessive Heat in Arizona, September 9 to 10, 2023
- Flash Flooding in Pennsylvania, September 9 to 10, 2023
- Rip Current in Indiana, September 9, 2023
- Damaging Winds in Virginia, September 9, 2023
- Hail and Damaging Winds in Kansas, September 9, 2023
- Damaging Winds in Maryland, September 9, 2023
- Flooding and Hail in Texas, September 9 to 10, 2023
- Damaging Winds in Pennsylvania, September 9, 2023
- Marine Thunderstorm Winds in North Atlantic Coastal Waters, September 9, 2023
- Flash Flooding and Damaging Winds in North Carolina, September 9, 2023
- Damaging Winds and Lightning Strike in Virginia, September 9, 2023
- Damaging Winds and Lightning Strikes in New Jersey, September 9, 2023
More
Every storm in California in 2023Every state in 2023This day in weather historyWarnings in California, September 2023
Sources
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: 1218414, 1218415, 1218416, 1218417, 1218418, 1218419, 1218420, 1218421.