Temperatures reached Excessive Heat Warning levels in Las Vegas on the 21st through 23rd. Two people died of heat related causes on the 21st.
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.
Temperatures reached Excessive Heat Warning levels in Las Vegas on the 21st through 23rd. Two people died of heat related causes on the 21st.
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 Jun 21, 8:00 AM PST, 3 hours earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 900 AM PDT Thu Jun 21 2018 .SYNOPSIS...Hot and dry conditions are expected through the next seven days with excessive heat expected today through Saturday. Slight cooling is likely Sunday before temperatures ramp back upwards next week. && .UPDATE...Excessive Heat Warning goes into effect this morning as hot and dry conditions develop over the region. Calculations off the morning sounding show Las Vegas reaching 113 degrees today which is in line with current thinking. Still looking at some slight cooling over the next couple of days, but high heat impacts will still exist. No changes to the forecast. && Previous Discussion 200 AM PDT Thu Jun 21 2018 .SHORT TERM...through Saturday night. Strong 500mg ridge with 596dm heights centered over southern Arizona will be the catalyst for very hot temperatures the next few days. Today will likely be the hottest day as heights peak in the 592-594 range and southwest breezes aid surface mixing. Heights drop ever so slightly on Friday in response to a shortwave traversing through the Great Basin and decrease a tad more on Saturday as stronger troughing digs into northern Utah. The end result will the first true summer heat spell (right on time given the summer solstice arrives today at 3:07 am PDT), with highs across most of the Mojave Desert in the 105-115 degree range. Lower elevations along the Colorado River will exceed 115 degrees while Death Valley soars into the 120s. The Excessive Heat Warning for most of the area, and Heat advisories for the upper elevations look good. Be prepared for the hot conditions by staying hydrated and limiting time spent outdoors. .LONG TERM...Sunday through Thursday. Not much change in the long term forecast. Still expecting a closed low to move into the central Rockies which will nudge the broad high pressure to our west. This will result in a slight drop in temperatures for Sunday and into early next week, but temperatures are still expected to be 5 to 10 degrees above seasonal normals through the work week. Models are in decent agreement on digging a Pacific NW trough into California and the Great Basin region during the Wednesday-Thursday time frame. Though, strength and location of this feature is not well resolved yet, some possible impacts look like gusty winds and a slight drop in temps by THU. Besides heat impacts, expect dry conditions with light to occasionally breezy afternoons under clear or mostly clear skies. && .AVIATION...For McCarran...Light and diurnal winds are expected through mid day Thursday with winds increasing out of the southwest in the afternoon with speeds around 10-15 kts and gusts over 20 knots. Very hot temperatures are expected with highs around 110-112 in Las Vegas. For the rest of southern Nevada, northwest Arizona and southeast California...Winds will be generally light through mid day Thursday then increasing out of the south around 10-20 kts most areas. Higher gusts likely in the western Mojave Desert. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && UPDATE...Gorelow SHORT TERM/AVIATION...Outler LONG TERM...Kryston 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 excessive heat. Local standard time, as filed.
Temperatures reached Excessive Heat Warning levels on the 21st through 23rd. Two people died of heat related causes on the 21st.
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 | 2018-06-21 | 52 | Male | Permanent Home | Direct |
| Excessive Heat, Las Vegas Valley | 2018-06-21 | 59 | Female | Permanent Home | Direct |
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, June 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: 762633.