This is the second of three entries documenting the long-duration excessive heat episode which lasted from August 30th through September 8th.
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.
This is the second of three entries documenting the long-duration excessive heat episode which lasted from August 30th through September 8th.
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 31, 9:23 PM MST, 2 hours 37 minutes earlier.
Area Forecast Discussion
National Weather Service Las Vegas NV
923 PM PDT Wed Aug 31 2022
.SYNOPSIS...The late August - early September heat wave is
underway. These hot and dry conditions are expected to continue
across most of the region through the Labor Day weekend as a dome of
high pressure settles over the Desert Southwest. Heat-related
impacts are of particular concern with the upcoming holiday weekend,
so extreme caution is advised when recreating outdoors.
&&
.UPDATE...As the ridge of high pressure shifts westward,
temperatures over Mohave County will cool slightly, reducing their
chances of reaching afternoon or overnight warm temperature records
and dropping their HeatRisk from "High" to "Moderate" due to the
decreased risk of heat-related illness. As such, the Excessive Heat
Warning for much of Mohave County has been allowed to expire
tonight. However, the Excessive Heat Warning will continue through
Sunday for the Colorado River Valley zones that are in Mohave
County, along with southern Nevada and southeastern California
(excluding the mountains) as temperatures range 8-12 degrees above
seasonal averages. No changes have been made to the forecast this
evening, as it looks to be in good shape.
&&
.PREVIOUS DISCUSSION...646 PM PDT Wed Aug 31 2022/
.DISCUSSION...Today through next week.
Overall, not a significant change in forecast expectations other
than a high confidence forecast for excessive heat has become very
high. As of the 12Z GEFS/GEM/EC runs, very little meaningful
difference was seen in cluster analysis in the H5 means. There
wasn't much as of 00Z either, but where there was, was over the
weekend and whether or not further deepening of the western CONUS
ridge would occur. This seems to now be agreed upon across all
three means and as a result, Saturday seems to be the best
opportunity for area records to be at least tied, if not exceeded.
So, while Excessive Heat Warnings have been out for several days for
much of the area, the northern zones were previously left out as the
aforementioned ensemble variance resulted in slightly lower
temperatures for Esmeralda/Nye/Lincoln in the NBM. Now that isn't
the case, and there is increasing confidence that heat risk will
become an issue for the population areas in Lincoln/Nye/Esmeralda
such as Goldfield, Tonopah, Pioche, and Caliente. Thus, we have
expanded the Excessive Heat Warning to include these counties
beginning tomorrow and through Sunday in line with the rest of the
area currently under the warning. Moving into next week, a slight
decrease of overall average temperatures is possible but may not be
enough to lower the heat risk to the point of letting the warning
expire, so if this trend of stubborn high pressure continues with
further runs, an expansion of the current warning will be needed
through at least Labor Day, if not further.
There are non-zero chances for precip over the weekend for southern
Mohave County but most of the members contributing to this
possibility are on the opposite end of the PDF (minority cluster)
than the dominant high scenario. So confidence is quite low that any
impacts would result from precip, but if they were to, they'd be
confined to areas south of the I-40 corridor.
&&
.FIRE WEATHER...
Hot temperatures and dry conditions will continue across
most of the region into the Labor Day weekend as a dome of high
pressure settles over the southwest. While winds are expected to
stay well below critical thresholds, area fuels are quickly
experiencing drying with this prolonged heat and are expected to
worsen heading into next week. Very little chance for wetting
rains are forecast outside of northwest Arizona through next week.
&&
.CLIMATE...Numerous locations have the potential to tie or break
record high and warm low temperatures through Labor Day Weekend.
The table below shows the record high temperature, the year the
record was last set, and the forecast temperature for all of our
climate sites.
MAX HIGH THURSDAY, SEPT 1 FRIDAY, SEPT 2 SATURDAY, SEPT 3
Record(Yr)/Fcst Record(Yr)/Fcst Record(Yr)/Fcst
Las Vegas 113(1950)/109 110(1950)/108 108(1982)/108
Bishop 104(1950)/105 106(1950)/103 106(2020)/106
Needles 120(1950)/110 116(1950)/109 116(1948)/111
Barstow-Daggett 110(2019)/110 112(1950)/110 110(1950)/109
Kingman 108(1950)/100 106(1950)/100 105(2020)/102
Desert Rock 104(2019)/106 104(2017)/107 105(2020)/106
Death Valley 123(1996)/123 122(2017)/124 121(2007)/123
The table below shows the record warm low temperature, the year the
record was last set, and the forecast temperature for all of our
climate sites.
WARM LOW THURSDAY, SEPT 1 FRIDAY, SEPT 2 SATURDAY, SEPT 3
Record(Yr)/Fcst Record(Yr)/Fcst Record(Yr)/Fcst
Las Vegas 86(2007)/87 84(2007)/86 85(2007)/85
Bishop 62(2020)/60 65(2013)/61 67(2003)/62
Needles 90(1945)/84 91(2007)/84 89(2017)/84
Barstow-Daggett 81(2007)/83 81(2007)/83 82(2007)/83
Kingman 78(1947)/74 81(1904)/74 80(1914)/73
Desert Rock 75(1996)/78 78(2019)/77 77(2017)/77
Death Valley 100(1924)/96 100(1924)/95 100(2007)/95
&&
.AVIATION...For Harry Reid...Minimal impacts expected today and
tomorrow due to high pressure and light winds. Typical diurnal
wind patterns expected. High temperatures will be the most
impactful weather concern for the terminal through the weekend
most likely, with highs well above 100 forecast. Temperatures will
exceed 100 roughly between 17Z-19Z each afternoon and fall below
between 04-06Z.
For the rest of southern Nevada, northwest Arizona and southeast
California...Other than hot conditions across the area, only
partly cloudy skies and generally light winds across the region
will be expected for all area terminals. Little aviation impacts
expected other than heat.
&&
.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.
&&
DISCUSSION/AVIATION...TB3
CLIMATE...Stessman/Varian
UPDATE...Varian
For more forecast information...see us on our webpage:
https://weather.gov/lasvegas or follow us on Facebook and TwitterThe national radar mosaic for the moment the first event began.
2 excessive heat. Local standard time, as filed.
This event began in August. Excessive Heat Warning criteria were reached on each of the first four days of September, and the event continued beyond.
This event began in August. Excessive Heat Warning criteria were reached on each of the first four days of September, and the event continued beyond.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2022Every state in 2022This day in weather historyWarnings in Arizona, September 2022
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: 1058429, 1058430.