Three 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.
Three 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 7, 7:52 PM PST, 4 hours 8 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 852 PM PDT Thu Sep 7 2017 .SYNOPSIS...Moisture is expected to increase Friday through Sunday leading to more widespread showers and thunderstorms over portions of the southern Great Basin and Mojave Desert. Temperatures will cool to below normal readings Friday and Saturday with the additional cloud cover. && .UPDATE...Still some weak convection going on in the eastern half of the forecast area this evening and the latest HRRR still indicates some potential for a few showers or thunderstorms overnight mainly in Mohave County. Forecast looks to be in pretty good shape and no updates planned this evening. -Harrison- && .PREV DISCUSSION... 320 PM PDT Thu Sep 7 2017 .SHORT TERM...tonight through Sunday. Moisture and instability over the eastern half of the forecast area has led to scattered showers and thunderstorms over Mohave, Clark and San Bernardino Counties this afternoon. The strongest storms are occurring over portions of eastern San Beranrdino and Clark counties where strong wind gusts have been an issue. DCAPES are generally around 1700 J/KG and we have seen several microbursts in the area. With ongoing outflow boundaries we may see storms continue through the evening before dissipating late. Upper low off the central California coast will move inland overnight and the associated trough will help pull low level monsoonal moisture northward early Friday. This moisture is expected to increase through the afternoon and into Saturday. Dynamics associated with low combined with increasing instability will lead to more widespread thunderstorms over Mohave, Clark, Lincoln, southern Nye, and eastern San Bernardino Counties Friday and Saturday. A sharp moisture/instability boundary stretching from roughly western Lincoln down through eastern San Bernardino County should keep things dry to the west, but storms along this boundary could become more organized. With the increased moisture and potential for training storms, heavy rain and long duration rainfall could be an issue. Have gone ahead and issued a flash flood watch for those aforementioned areas starting mid Friday morning and continuing into Monday morning. Moisture will remain on Sunday, but the upper low that moved inland over central California will retrograde and the moisture boundary is expected to shift further west. This could bring more of the heavy rain and thunderstorms to western San Bernardino and Inyo Counties Sunday. At this time will not issue any statements for those areas, but as we get close a Watch may be needed. .LONG TERM...Monday through Thursday. Lingering chances for thunderstorms, though lower than Saturday, will remain over much of the forecast area Sunday as moisture wraps around the closed low off the southern California Coast. Although moisture decreases, there will be broad diffluence over much of the forecast area and more surface heating to support thunderstorm development. There is good agreement among the GFS and ECMWF that a drier southwest flow will spread over the region Monday through Wednesday as the closed low slowly lifts toward central California then moves inland. The ECMWF depicts a deep broad trough diving out of the Pacific Northwest that looks like will scour all moisture out of the region by Thursday along with a noteworthy cooling trend. If this plays out, it will be the end of monsoon season about on schedule with the transition to a fall pattern as troughs drop down from the northwest. && .AVIATION...For McCarran...Afternoon thunderstorms will subside and gusty south winds will subside and favor the usual southwest overnight. By late tomorrow morning, southeast winds will kick in, bringing a push of monsoon moisture and thunderstorms to the region. Training thunderstorms will be possible much of the day into overnight, capable of producing gusty winds and very heavy rain. Ceilings may come down to below 10 kft under thunderstorms. For the rest of southern Nevada, northwest Arizona and southeast California...Increasing moisture will bring increasing thunderstorm chances and lowering ceilings across much of the region, especially along the Colorado River Valley. Storms are likely to be more widespread by the evening, with gusty winds and heavy rain the main threats. Ceilings look to fall to or under 10 kft under thunderstorms. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && SHORT TERM...Gorelow LONG TERM....Adair AVIATION.....Steele For more forecast information...see us on our webpage: http://weather.gov/lasvegas or follow us on Facebook and Twitter
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
804 PM PDT THU SEP 07 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0619 PM FLASH FLOOD HIKO 37.60N 115.22W
09/07/2017 LINCOLN NV LAW ENFORCEMENT
NHP REPORTED A 200-300 YARD STRETCH OF STATE ROUTE 318 AT
HIKO WAS CLOSED DUE TO FLOODING. LOCAL TRAFFIC WAS BEING
ALLOWED TO PASS.
&&
JHThe national radar mosaic for the moment the first event began.
1 heat. Local standard time, as filed.
Three 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 | 2017-09-08 | 26 | Female | Outside/Open Areas | Direct |
| Heat, Las Vegas Valley | 2017-09-11 | 62 | Female | Permanent Home | Indirect |
| Heat, Las Vegas Valley | 2017-09-11 | 74 | Male | Permanent Home | 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: 721079.