Excessive Heat Warning criteria were reached in Las Vegas from July 24 through 28. Seventeen people died in Las Vegas of heat related causes during and in the immediate aftermath of the excessive heat.
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.
Excessive Heat Warning criteria were reached in Las Vegas from July 24 through 28. Seventeen people died in Las Vegas of heat related causes during and in the immediate aftermath of the excessive heat.
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 Jul 23, 6:15 PM PST, 5 hours 45 minutes earlier.
Area Forecast Discussion
National Weather Service Las Vegas NV
715 PM PDT Mon Jul 23 2018
.SYNOPSIS...Thunderstorm development will largely be inhibited
across much of the region except the southern Sierra and high
mountains as a strong area of high pressure builds over the
southwest states. This will lead to dangerously hot conditions
across the Mojave Desert and southern Great Basin much of this
week.
&&
.UPDATE...A few storms remain this evening mainly across western
Inyo county and near the Sierra. Despite moderate instability in
place across much of the region, building high pressure overhead has
led to widespread subsidence, limiting thunderstorm strength and
coverage. With loss of daytime heating, any remaining storms this
evening will quickly die off after sunset. Updated the forecast
grids to account for current trends but the overall forecast remains
in good shape.
-Outler-
&&
.SHORT TERM...through Thursday night.
Thunderstorms will be most active over the southern Sierra the
rest of the afternoon and early evening. Isolated cells developing
over the mountains from the Mojave National Preserve up across
Clark and into Lincoln County will remain mostly fixed near the
mountains. The latest HRRR indicates outflow may push south
of convection from central Nye and Lincoln counties this evening.
The most significant impact for our region will be excessive
heat as temperatures continue climbing Tuesday and approach record
levels Wednesday and Thursday. Thunderstorm development will
be a little more sparse Tuesday through Thursday as the dome
of hot air moves over the region.
.LONG TERM...Friday through Monday.
Models call for a cooling trend beginning Friday which returns
temperatures closer to normal over the weekend. Kept slight chance
of thunderstorms over southern Mohave and parts of eastern and
southern San Bernardino counties Saturday and Sunday with models
forecasting a weak disturbance approaching from the south where the
better moisture is pooled.
&&
.CLIMATE...Very hot - near record - temperatures are expected
Tuesday through Friday this week. The table below shows the
record temperature this week and the year recorded for McCarran
(Las Vegas), Death Valley, Needles, Barstow/Daggett, Bishop
and Kingman.
RECORD HIGH TEMPERATURES (YEAR)
---------------------------------------------
TUE (7/24) WED(7/25) THU(7/26) FRI(7/27)
LOCATION ---------------------------------------------
McCarran | 117 (1942) 115(1942) 116(1943) 115(2016)
Death Valley | 126 (2006) 126(2006) 127(1933) 127(1933)
Needles | 119 (2006) 120(1943) 118(1959) 119(2016)
Barstow/Daggett | 112 (2016) 115(1975) 114(1995) 115(1995)
Bishop | 107 (2016) 107(2016) 108(1975) 108(2016)
Kingman | 107 (1928) 107(1943) 108(1934) 108(1934)
&&
.AVIATION...For McCarran...An area of high pressure will
strengthen over southern Nevada reducing thunderstorm
development this week. Winds will favor typical diurnal
directions with speeds generally less than 8 knots.
There is a slight chance that outflow from storms near the
Nevada National Security Site could blow into the Vegas Valley
later this evening.
For the rest of southern Nevada, northwest Arizona and southeast
California...Thunderstorms over the southern Sierra and high
mountains of the southern Great Basin will dissipate after sunset.
Isolated thunderstorms will develop Tuesday afternoon primarily
over the southern Sierra. The rest of the region should see
generally tranquil weather with winds less than 15 knots and
FEW-SCT clouds with bases above 12 kft.
&&
.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.
&&
SHORT TERM/AVIATION...Adair
LONG TERM...Salmen
CLIMATE...Boothe
For more forecast information...see us on our webpage:
http://weather.gov/lasvegas or follow us on Facebook and TwitterPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
816 PM PDT MON JUL 23 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0515 PM DEBRIS FLOW 1 S ASPENDELL 37.23N 118.60W
07/23/2018 INYO CA LAW ENFORCEMENT
PARTIAL CLEARING OF SUNDAYS DEBRIS FLOW WAS
IMPAIRED BY ADDITIONAL MUDSLIDES FOLLOWING
HEAVY RAIN IN THE AREA TODAY. CLEANUP CREWS
ESSENTIALLY ARE STARTING FROM SCRATCH AGAIN
TUESDAY.
&&
COThe national radar mosaic for the moment the first event began.
1 excessive heat. Local standard time, as filed.
Excessive heat lasted for five days in Las Vegas. Seventeen people died in Las Vegas of heat related causes during and in the immediate aftermath of the excessive heat.
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 | 2018-07-25 | 68 | Male | Unknown | Indirect |
| Excessive Heat, Las Vegas Valley | 2018-07-28 | 59 | Male | Other | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-24 | 54 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-25 | 75 | Female | Outside/Open Areas | Indirect |
| Excessive Heat, Las Vegas Valley | 2018-07-26 | 56 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-26 | 44 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-26 | 58 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-27 | 41 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-28 | 46 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-28 | 54 | Male | Outside/Open Areas | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-25 | 71 | Female | Permanent Home | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-26 | 68 | Male | Permanent Home | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-26 | 55 | Male | Permanent Home | Indirect |
| Excessive Heat, Las Vegas Valley | 2018-07-27 | 66 | Female | Permanent Home | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-29 | 42 | Female | Permanent Home | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-29 | 81 | Male | Permanent Home | Direct |
| Excessive Heat, Las Vegas Valley | 2018-07-30 | 75 | Male | 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, July 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: 773537.