Strong high pressure built over the Mojave Desert, leading to dangerously hot temperatures. This episode continued into August..
Every event with a place to put it; 5 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.
Strong high pressure built over the Mojave Desert, leading to dangerously hot temperatures. This episode continued into August..
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 30, 7:58 AM PST, 3 hours 2 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 858 AM PDT Thu Jul 30 2020 .SYNOPSIS...High pressure over the desert southwest will dominate the weather pattern through the next week, resulting in hot and dry conditions. Subtle relief in temperatures are expected early next week but will remain unseasonably warm for the foreseeable future. .UPDATE...Some hazy skies were observed this morning across southern NV which are likely attributed to the small wildfire called Bishop located south of Caliente, NV. Besides lofted smoke this morning, skies should remain mostly clear today. No updates needed to the forecast this morning. The Excessive Heat Warning will go into effect at 10am today and continue through 8PM Saturday for much of southern NV, northwest AZ, and southeast CA. -Kryston && .PREV DISCUSSION... /issued at 325 AM PDT Thu Jul 30 2020/ && .SHORT TERM...Today through Saturday. Really no significant changes to the forecast through Saturday. Model trends have been rather consistent in developing this high pressure over the southwest resulting the heat messaging we have been advertising for the last several days. The details in this feature evolving through Saturday may result in 1-2 degrees of overall difference but otherwise, not much else to say other than a nice hot, thick atmosphere will be overtop through Saturday. The high heat risk categories result more as a result of this well above average heat persisting for three days than the magnitude of the heat itself, however it is worth noting the forecast high of 120 at KIFP would be 1 degree from its July 31st record high of 121. So the southern extend of the Colorado River Valley are actually a very high risk for heat related impacts, as you'd expect with three days of near record heat. .LONG TERM...Sunday through Wednesday. High pressure holds firm over the southwestern states Sunday and Monday but is forecast to be less intense. This should allow some minor cooling of temperatures but overall remain above normal by around 5 degrees both days. Although temperatures are only expected to be slightly cooler Sunday and Monday, the Heat Risk decreases overall and high risk of heat-related impacts becomes more localized. On Tuesday, a shortwave is forecast to swing through the PacNW which acts to suppress the high to our south and result in temperatures dipping another couple of degrees. By Wednesday, weak troughing sets up off the California coast with high pressure centered east of our area over southern New Mexico. This should keep temperatures on Wednesday similar or slightly cooler than Tuesday. This is an unfavorable weather pattern for monsoon moisture into our area so we continue to see dry conditions across the region. && .AVIATION...For McCarran...Much of the daytime hours today should result in light and variable winds for the terminal before minor afternoon breezes begin out of the southwest this afternoon. Gusts up to 20 kts will be possible after 20Z but ending around nightfall and returning to sub 10 kts. Skies will remain SKC thus resulting in very minor wind impacts only to the terminal today. For the rest of southern Nevada, northwest Arizona and southeast California...Minor afternoon breezes are the only aviation impact expected today for regional terminals. KDAG/KBIH will be the locations seeing the strongest winds, up to about 25 kt gusts in the late afternoon. Skies will again be SKC for much of the region. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && SHORT TERM/AVIATION...TB3 LONG TERM...Salmen For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter
The national radar mosaic for the moment the first event began.
6 excessive heat. Local standard time, as filed.
Excessive Heat Warning criteria were reached on the last two days of the month. The event continued into August.
Excessive Heat Warning criteria were reached on the last two days of the month. The event continued into August.
Excessive Heat Warning criteria were reached on the last two days of the month. The event continued into August.
Excessive Heat Warning criteria were reached on the last two days of the month. The event continued into August.
Excessive Heat Warning criteria were reached on the last two days of the month. The event continued into August.
Excessive Heat Warning criteria were reached on the last two days of the month. The event continued into August.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2020Every state in 2020This day in weather historyWarnings in Nevada, July 2020
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: 900123, 900124, 900125, 900126, 900127, 900129.