Excessive Heat Warning criteria were reached on three straight days. Five people died in the Las Vegas Valley as a result.
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 VEF wrote it up.
Excessive Heat Warning criteria were reached on three straight days. Five people died in the Las Vegas Valley as a result.
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 Las Vegas, NV wrote its last area forecast discussion before the first event at Jul 1, 7:25 AM PST, 3 hours 35 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 825 AM PDT Sat Jul 1 2023 .SYNOPSIS...Dangerous heat is expected through the holiday weekend with a trend towards more typical early July temperatures later in the week. Otherwise, dry conditions are expected with periods of afternoon breezes. && .UPDATE...High pressure continues to build through Monday, resulting in warming temperatures each day. We'll likely see our first 110 Sunday and/or Monday. Widespread Moderate-to-High HeatRisk is forecast this holiday weekend, prompting the Excessive Heat Warnings that go into effect this afternoon. Be sure to properly plan and hydrate for any outdoor activities. A trough sags into the region on Tuesday, dropping temperatures down to near-normal values and reintroducing breezy southwest winds. Updated forecast package will be out this afternoon. && .SHORT TERM...through Monday. High pressure ridge will sit atop the region through Monday with a continued warming trend expected, as well as the hottest temperatures of 2023 so far. Temperatures this afternoon will climb several degrees warmer than observed Friday, with additional degree or two or warming Sunday and Monday. Moderate to high heat risk is expected during this time and the Excessive Heat Warning remains in good shape. Given the cool spring and early summer observed so far, many local residents are yet to fully acclimatise to this level of heat, so beware of the signs of heat exhaustion and limit outdoor exposure during the hottest parts of the day as much as possible. Aside from the heat, generally calm winds are expected through the weekend, with an uptick in southwesterly wind gusts Monday afternoon as a shortwave in the Great Basin approaches. .LONG TERM...Fourth of July through Saturday. Guidance has been consistently showing around a 5 degree drop in temperatures from the peak on Monday to July 4th. With that drop, HeatRisk projected to lower back into the moderate category. However, due to this rapid rise in heat folks may not yet be acclimated. Hydration is key, also plan outdoor activities in the mornings and evenings through the holiday weekend. Beyond the 4th, GEFS and EPS both show negative height anomalies associated by a weak trough of low pressure developing over northern California during the second half of next week. That should be enough to gradually suppress the strong high center to our south- southeast. Temperatures on the 4th will be around 3 degrees above normal with high forecast to be closer to normal by next weekend. The only other item to mention is expect afternoon breezes from the south-southwest each day. && .AVIATION...For Harry Reid...Light and variable winds are expected through mid-morning before turning northeast by mid-day. Winds are then expected to remain northeasterly through the afternoon before briefly turning east during the early evening. Southwest winds are expected after sunset, continuing into Sunday morning. Wind speeds are expected to remain less than 10kts through the TAF period, along with mainly clear skies. For the rest of southern Nevada, northwest Arizona and southeast California...Light winds favoring typical diurnal variations are expected at most area TAF sites into Sunday. The exception will be KDAG, where light winds are expected through the afternoon before southwest winds gusting up to 20kts are likely after sunset. All areas will see mainly clear skies into Sunday. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && UPDATE...Woods SHORT TERM...Outler LONG TERM...Pierce AVIATION...Planz For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter
The national radar mosaic for the moment the first event began.
5 excessive heat. Local standard time, as filed.
Excessive Heat Warning criteria were reached on three straight days.
Excessive Heat Warning criteria were reached on three straight days.
Excessive Heat Warning criteria were reached on three straight days. Five people died of heat-related causes.
Excessive Heat Warning criteria were reached on three straight days.
Excessive Heat Warning criteria were reached on three straight days.
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 |
|---|---|---|---|---|---|
| Excessive Heat, Las Vegas Valley | 2023-07-01 | 74 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2023-07-03 | 77 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2023-07-04 | 43 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2023-07-04 | 80 | Female | Permanent Home | Direct |
| Excessive Heat, Las Vegas Valley | 2023-07-04 | 71 | Male | Vehicle/Towed Trailer | Indirect |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2023Every state in 2023This day in weather historyWarnings in Nevada, July 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 2026-09-24. Each event’s entry at NCEI: 1119081, 1119083, 1119085, 1119086, 1119087.