Temperatures reached Excessive Heat Warning levels on the 12th and 13th. Five people died - four in Las Vegas and one in northeast Clark County - of heat related causes from the 13th through the 14th.
Every event with a place to put it; 2 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 on the 12th and 13th. Five people died - four in Las Vegas and one in northeast Clark County - of heat related causes from the 13th through the 14th.
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 12, 8:11 AM PST, 2 hours 49 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV Issued by National Weather Service FLAGSTAFF AZ 911 AM PDT Tue Jun 12 2018 .SYNOPSIS...Hot and dry weather conditions expected through mid week with clear skies, afternoon breezes and well above normal temperatures. Increasing moisture Friday and into the weekend will bring a chance of showers to the area with cooler temperatures. && .UPDATE...Subtropical high pressure centered over New Mexico will dominate the weather across the southwest over the next few days. This will result in a weak southwesterly flow aloft across the forecast area. Hot temperatures will continue with heat being the main weather concern. Excessive Heat Warnings remain in effect through Wednesday for the valleys of southern NV, southeast CA, and south along the Colorado River. && .PREV DISCUSSION... /issued at 250 AM PDT Tue Jun 12 2018/ .SHORT TERM...Today through Thursday night The main concern through Thursday continues to be the heat and its potential impacts. The current excessive heat warning looks good for today and Wednesday, with little change to the temperatures from the previous forecast. Hot and dry southwest flow does continue into Thursday, and there is some concern that the heat impacts will continue through Thursday afternoon. However, there is also the potential for increasing cloud cover on Thursday south and east of I- 15 as model show an area of high level moisture and a weak piece of energy pushing into the area. Based on the latest runs, bumped up clouds in this area for increasing high level moisture Wednesday night and Thursday. With the extra clouds, increased overnight lows Wednesday night in the Colorado River Valley and Mohave County...but decreased high temperatures Thursday from what the best performing models wanted to populate. Given the uncertainty, for now will watch how models trend with cloud cover on Wednesday and Thursday as well as how high temperatures perform today before decided on extending the excessive heat warning into Thursday. Should remain dry through at least Thursday as low level moisture does not start increasing until at least Thursday night. A few showers are possible in southern Mohave county Thursday night, but the better moisture doesn't arrive until after 12Z Friday so wouldn't be surprised if it remained dry until Friday afternoon. && .LONG TERM...Friday through Monday Night Confidence is starting to increase that the area will see some effects from the remnants of Hurricane Bud. The phasing of the approaching mid-level trough and moisture from Bud are well represented in both the GFS and ECMWF models and their associated ensembles. This is serving to increase confidence for the forecast heading into the weekend. The primary timeframe to focus on in our area will be Friday and Saturday. There are some interesting aspects to the larger scale setup to this event. In previous discussions it was noted that the approaching mid- level trough from the Pacific Northwest would interact with the remnant moisture from Hurricane Bud coming up from the south to provide a threat of precipitation to parts of the area. The surge of moisture from the south occurs primarily due to the fact that the mid-level trough deepens (rather rapidly) and increases southerly flow across the area. The catalyst for the rapidly deepening trough is quite interesting. In looking at the finer details, the deepening occurs due to the phasing of the trough with a small upper-level low pressure circulation and associated Potential Vorticity anomaly over the Pacific Ocean near 28N/133W. This PV anomaly is forecast to make its way eastward around the high pressure ridge over the southwest US only to get merged in and phase with the trough. This causes the deepening that will turn the flow south and open the door for things to moisten up. So there is your cool meteorology fact of the day. As stated earlier, Friday and Saturday is where the area is likely to see any precipitation. High level cloud cover will begin moving in late Thursday setting up a cloud shield over Arizona and portions of southeastern California. The edge of that cloud shield might be clearly defined so central and western portions of our area may see sun. This could have other repercussions as discussed below. A stronger surge of lower level moisture pushes in mid-day Friday. Again, mainly over eastern portions of the area. At this same time, a mid-level front associated with the trough moves south. These two characteristics will provide a forcing mechanism and moisture for light precipitation to form, mainly over Mohave County and the Colorado River Valley and perhaps a bit further west. A related concern is the development of thunderstorm activity. With a clearly defined edge to any cloud shields that develop, sunshine on the western periphery could cause us to destabilize and form showers. The mid-level trough may provide enough cool air aloft to get convective activity going. If so, we may see locally higher precipitation amounts along with the typical thunderstorm threats. Uncertainty on this potential thunderstorm formation is high. But it remains a possibility. On Saturday, the mid-level trough starts to progress eastward. This is a slow exit to the moisture and forcing which will keep precipitation chances high for Saturday. On Sunday conditions begin to improve. However, the upper level trough axis stays over the area keeping us a bit cooler than in previous weeks. && .AVIATION...For McCarran...Light winds this morning will become east for a time through midday, then veer southeast and increase to around 10kts this afternoon. Expect southwest winds will return overnight,but should remain at or above 8kts through at least midnight. Diurnal winds return Wednesday morning. VFR conditions are expected through Wednesday. For the rest of southern Nevada, northwest Arizona and southeast California...Typical diurnal winds expected area-wide with speeds generally under 10 kts, except in DAG where winds 10-15kts are likely beginning this evening and continuing tonight. VFR conditions persisting through the period. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && UPDATE...MCT SHORT TERM...Wolf LONG TERM....Lericos && 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.
2 excessive heat. Local standard time, as filed.
Temperatures reached Excessive Heat Warning levels on the 12th and 13th. Four people died in Las Vegas of heat related causes on the 13th and 14th.
Temperatures reached Excessive Heat Warning levels on the 12th and 13th. One person died northeast of Glendale of heat related causes on the 13th.
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 | 2018-06-13 | 57 | Male | Outside/Open Areas | Indirect |
| Excessive Heat, Las Vegas Valley | 2018-06-13 | 69 | Female | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-06-13 | 66 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-06-14 | 79 | Male | Permanent Home | Indirect |
| Excessive Heat, Northeast Clark | 2018-06-13 | 47 | Male | Vehicle/Towed Trailer | 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: 762630, 762631.