Seven people died in Las Vegas 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.
Seven people died in Las Vegas 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 Aug 10, 5:24 PM PST, 6 hours 36 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 624 PM PDT Fri Aug 10 2018 .SYNOPSIS...Thunderstorm chances will remain in areas roughly along and east of a line from Barstow to Rachel on Saturday, then shift to areas north and east of Las Vegas for Sunday through early next week. Temperatures will drop to near normal over the weekend into early next week. && .NEAR TERM...5 PM through 12 AM PST Low confidence in the convective evolution this evening. There are a few areas of interest: 1) LINCOLN COUNTY - A cluster thunderstorms are moving southward and expected to continue to do so over the next several hours. These storms may continue well into the evening, but their survival will strongly depend on whether a cohesive cold pool becomes established. 2) MOHAVE COUNTY/Eastern CLARK COUNTY - Intensifying storms east of Flagstaff along I-40 will pose a threat to at least Mohave County through the evening and potentially southern Nevada and eastern San Bernardino late this evening. A more defined cold pool is expected across these areas, which may allow new convection with elevated instability in place (MUCAPE values between 1200-1800 J/kg). Strong outflows between 40-50 MPH will be possible in these areas, which may reach Las Vegas/Lake Mead NRA between 9pm-12am. Dust storms will also be possible again, especially across Mohave County, as outflow sweeps over dust sources. Limiting factors for convection surviving through the evening will be how quickly cold pools can become established before daytime heating is lost. We will update the forecast as trends evolve this evening. Stay tuned. && .PREVIOUS DISCUSSION... 242 PM PDT Fri Aug 10 2018 .SHORT TERM...through Saturday night. Thus far, early afternoon thunderstorms were limited to northern Lincoln County. Cumulus clouds were starting to build over the mountains of northern Inyo, northern and central Nye, Clark, and Mohave counties. Thus far, storms over Arizona have been farther south than yesterday, lending credence to the cluster of high resolution models which deliver only a glancing blow to the southeast corner of Mohave County later this evening. However, there is still a chance of storms developing farther north and affecting more of Mohave County, so kept precip chances there as well. Either way, a large outflow boundary is likely to affect some portions of Mohave, Clark, and San Bernardino counties tonight. For tomorrow, models show more activity over Lincoln, Mohave, and Clark counties, as well as the Sierra crest. Previous forecast looked good and made only minor tweaks. .LONG TERM...Sunday through Friday. On Sunday, mid level ridge over the Great Basin/Mojave Desert is sandwiched between an upper low around the Texas Panhandle and the remnant mid level circulation from what was Hurricane John well off the southern California coast. Between today and Sunday, models not showing any new influx of moisture with precipitable water values of an inch or greater staying confined to parts of San Bernardino, southeast Inyo, southern Nye, Clark and Mohave Counties. Greatest instability lies across Mohave County/Colorado River Valley Sunday. Northeast steering flow around the high center will steer storms off the higher terrain of central Arizona south-southwest into the lower deserts of Mohave County/lower Colorado River. Models suggesting some possible drying from the southwest Monday-Wednesday with a slight chance of storms mainly occuring over the southern Sierra, east across south central Nevada and Mohave County. By Thursday and Friday, area could see an uptick in activity as additional moisture surges northward into the lower Colorado River/Mojave Desert in association with an inverted trough. Kept temperatures near normal during the period. && .AVIATION...For McCarran...Winds should remain mostly light and variable through the afternoon hours. Another possibility for convection originating in north-central Arizona this evening could again bring gusty southeast winds to LAS this evening. Timing a little less certain across model solutions and amendments may be needed to hone in on timing this evening. Again, similar to last night, these winds should subside into the overnight hours returning to light winds by the morning hours. For the rest of southern Nevada, northwest Arizona, and southeast California...diurnal patterns will continue for KBIH and KDAG. Thunderstorm outflow will again be possible for KEED and KIFP as another round of convection looks likely in north-central AZ. These winds could reach as far north as the Las Vegas Valley as well impacting both KVGT and KHND. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ NEAR TERM...Boothe SHORT TERM...Morgan LONG TERM...Pierce AVIATION...Boucher 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
1226 AM PDT SAT AUG 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0950 PM TSTM WND GST RACHEL 37.64N 115.74W
08/10/2018 M60 MPH LINCOLN NV MESONET
MESONET SITE MEASURED A WIND GUST TO 60 MPH.
0931 PM TSTM WND GST RACHEL 37.65N 115.75W
08/10/2018 M61 MPH LINCOLN NV MESONET
MESONET SITE MEASURED A WIND GUST TO 61 MPH.
&&The national radar mosaic for the moment the first event began.
1 heat. Local standard time, as filed.
Seven people died in Las Vegas 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 | 2018-08-11 | 53 | Female | Outside/Open Areas | Direct |
| Heat, Las Vegas Valley | 2018-08-12 | 55 | Male | Outside/Open Areas | Indirect |
| Heat, Las Vegas Valley | 2018-08-14 | 85 | Female | Outside/Open Areas | Direct |
| Heat, Las Vegas Valley | 2018-08-14 | 40 | Female | Outside/Open Areas | Indirect |
| Heat, Las Vegas Valley | 2018-08-15 | 48 | Male | Outside/Open Areas | Indirect |
| Heat, Las Vegas Valley | 2018-08-13 | 84 | Female | Permanent Home | Indirect |
| Heat, Las Vegas Valley | 2018-08-13 | 91 | Male | Permanent Home | Indirect |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2018Every state in 2018This day in weather historyWarnings in Nevada, August 2018
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: 779141.