143
FXUS65 KVEF 270833
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
133 AM PDT Fri Sep 27 2024

.SYNOPSIS...Dry conditions and hotter than normal temperatures
will continue into next week, with multiple Excessive Heat
Warnings in effect across the southern California, southern
Nevada, and northwestern Arizona.

&&

.DISCUSSION...through next Friday.

Hotter than normal temperatures will continue into next week as the
ridge of high pressure positioned over the Four-Corners remains the
dominant synoptic feature over the Southwestern US. This ridge will
retrograde slightly today and tomorrow, which will allow for the
warming trend of the past few days to continue into the weekend.
With temperatures today and tomorrow forecast to be hotter than
previous days, an Excessive Heat Warning will go into effect
later this morning for Death Valley, the Las Vegas Valley,
northeastern Clark County, southern Mohave County, and southern
San Bernardino County. Additionally, the Excessive Heat Warning
for the Colorado River Valley, which went into effect Thursday
morning, will remain in effect. Widespread Major Heat Risk (Level
3 of 4) will impact these areas over the next few days, with
pockets of Extreme Heat Risk (Level 4 of 4) popping up in the
lower elevations of the Colorado River Valley and Death Valley
beginning Saturday.

A weak cut-off low will approach the southern California coast on
Sunday, attempting to push inland on Monday before being pulled back
out to sea by the ridge over the Pacific. This will allow for
temperatures to "cool" a degree or two each day on Sunday and
Monday. Unfortunately, even with this slight decrease in
temperatures, we will still find ourselves around 10+ degrees hotter
than normal as we head into October. This slight cool down will be
enough for Heat Risk levels in northeastern Clark County and the Las
Vegas Valley to drop back down to Moderate (Level 2 of 4) on Sunday.
However, the remaining zones under Excessive Heat Warnings will see
Major to Extreme Heat Risk hold on through at least Tuesday.

At this point, you`re probably wondering when this late season
heatwave will end. Fair enough, we`ve been asking ourselves that
very same question all week, and we`ve got some good news and
some bad news for you. The good news is that long term guidance
shows a cooling trend on tap for the second half of next week. The
bad news, temperatures will still be warmer than normal. However,
they will only be around 5 degrees above normal rather than the
10 to 15 degrees above normal that we will experience this
weekend.

&&

.AVIATION...For Harry Reid...Winds to remain diurnal in direction
generally 9 knots or less, light and variable this morning shifting
from northeast to east late morning through afternoon. Direction
switches to the southwest this evening before becoming light and
variable once again Saturday morning. Temperatures will climb to 100
degrees or higher daily into early next week with clear skies.

For the rest of southern Nevada, northwest Arizona and southeast
California...Expect diurnal terrain driven winds generally 10 knots
or less through the weekend. KDAG and KBIH may see brief periods
where winds climb above 10 knots in the mid to late afternoon hours.
Unseasonably hot temperatures will also be present with clear
skies.

&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.

&&

$$

DISCUSSION...Stessman
AVIATION...Pierce

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