Four people in the Las Vegas Valley died of heat related causes.
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 episode as NWS VEF wrote it up.
Four people in the Las Vegas Valley died of heat related causes.
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 Sep 1, 12:58 PM PST, 11 hours 2 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 158 PM PDT Fri Sep 1 2017 .SYNOPSIS...A surge of moisture from the Gulf of California may impact the region beginning Saturday. This could bring increased chances for thunderstorm activity beginning Saturday afternoon across areas south of Las Vegas. Remnant moisture from Tropical Storm Lidia is expected to provide a glancing blow to at least southeast California Sunday and Monday bringing additional moisture and therefore chances for showers and thunderstorms through Labor Day Weekend. High pressure building early next week will return temperatures to above normal while trapped moisture provides a chance of storms each afternoon through the week. && .SHORT TERM...Tonight through Sunday. Today has been a welcome quiet weather day across the region so far. There remains a chance of an isolated shower or storm over the higher terrain through the rest of the afternoon. Attention then turns to the south. Tropical Storm Lidia continues to churn along the Baja California peninsula, progressing NNW. There is some model indication that a gulf surge may take place, sending moisture up the Gulf of California into the Colorado River Valley by Saturday afternoon/evening. This would result in a rapid uptick in low level moisture and storm chances for at least eastern San Bernardino and southern Mohave counties, potentially as far north as Lake Mead and the Las Vegas Valley Saturday night. Confidence in this forecast is, and will be, low until evidence of a gulf surge (usually noted in Yuma) is seen. I have increased PoPs across the impacted areas to account for this possibility. Additionally, at least the GFS-based guidance indicates a weak impulse moving west from the Mogollon Rim towards Las Vegas Saturday Night, this could aid in keeping storm activity going into the overnight hours. By Sunday, the more robust moisture associated with the outer edges of Lidia will move northwest, clipping southern California. It remains unclear just how far east the moisture will push, but at least western San Bernardino and Inyo counties should see significant increases in precipitable water. PoPs were expanded Sunday to account for the considerable uncertainty in the forecast and increased across the western portions of the CWA where the moisture is most likely to be. As with any tropical influence it will bring with it a significantly increased chance of warm rain processes leading to possible flash flooding and lower lightning rates (this can catch folks enjoying outdoor recreation off-guard - a high concern due to the holiday weekend). .LONG TERM...Monday through Thursday. Monday will start with a large high pressure ridge over the intermountain west with a closed low and remnants of Lidia off the SoCal coast. This leaves our region sandwiched between the two features under a southeasterly flow aloft. This will tend to aid in some modest moisture advection into the region, along with continued hot temperatures. Then, heading into midweek, high pressure will build across the western states, to be situated very much over top of us by late next week. Under this pattern, and moisture across the region will find itself trapped under the ridge with hot temperatures and low grade monsoon activity possible daily. Maintained low, mostly higher terrain PoPs for much of next week, with greatest chances occuring during the daylight hours. Also trended temperatures upward given the influence of the strong high pressure ridge promised to sit across the Western U.S. Temperatures next week will be quite warm for early September, and may approach daily records at times. In summary, be prepared for yet another round of intense late summer heat. && .AVIATION...For McCarran...Only a few clouds developing over the Spring Mountains and Sheep Range this afternoon. If any thunderstorms do develop they will likely remain over the mountains, but there is also an outside chance of outflow boundaries reaching the valley through 03z. However, there is very low confidence in this occurring. Otherwise, mainly clear skies overnight with southwest winds developing after sunset with speeds around 5-7 kts. There is a better chance of seeing thunderstorms developing over the Spring Mountains Saturday afternoon with the possibility of outflow boundaries affecting the valley. Few-sct 140 with mainly northeast to east winds around 7 kts after 18z. For the rest of southern Nevada, northwest Arizona and southeast California...Few-sct clouds developing over most areas this afternoon with isolated thunderstorms occurring over far northern Mohave County. These are expected to diminish quickly this evening. Mainly clear skies overnight most areas with just a few clouds around 15k feet elsewhere. Winds will generally remain under 10 kts. Thunderstorm chances will increase over southern Mohave, southern Clark and eastern San Bernardino Counties Saturday with cigs down to 10k feet at times along with gusty outflow winds possible. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && SHORT TERM...Wolcott LONG TERM....Outler AVIATION.....Gorelow For more forecast information...see us on our webpage: http://weather.gov/lasvegas or follow us on Facebook and Twitter
The national radar mosaic for the moment the first event began.
1 heat. Local standard time, as filed.
Four people died of heat related causes.
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, Las Vegas Valley | 2017-09-03 | 62 | Male | Outside/Open Areas | Indirect |
| Heat, Las Vegas Valley | 2017-09-06 | 38 | Male | Outside/Open Areas | Direct |
| Heat, Las Vegas Valley | 2017-09-05 | 78 | Female | Permanent Home | Indirect |
| Heat, Las Vegas Valley | 2017-09-02 | 46 | Male | Permanent Structure | Indirect |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2017Every state in 2017This day in weather historyWarnings in Nevada, September 2017
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: 721078.