397
FXUS65 KVEF 091037
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
337 AM PDT Wed Jul 9 2025

.KEY MESSAGES...

* Low humidity and strong winds will result in critical fire weather
  conditions across the northern portions of Lincoln County today.

* An Extreme Heat Warning is in effect for southern Mohave County
  and the Colorado River Valley for today.

* Hot and dry conditions will continue through the weekend and
  into early next week as ridging persists across the region.

&&

.DISCUSSION...through early next week.

Breezy southwesterly winds will pick up across southern Nevada as a
shortwave moves through the Great Basin today. These winds, combined
with low humidity and dry fuels will result in critical fire weather
conditions across the northern portions of Lincoln County, where a
Red Flag Warning is in effect this afternoon and evening. For more
details, see the FIRE WEATHER section below.

Temperatures will peak across the southeastern portion of our
forecast area today, resulting in widespread Major (Level 3 of 4)
HeatRisk across southern Mohave County and the Colorado River
Valley. Major HeatRisk will affect anyone without access to
effective cooling and/or adequate hydration. Given that temperatures
will top out 5+ degrees above normal and the risk posed from the
heat, an Extreme Heat Warning has been issued for the aforementioned
areas for this afternoon and evening. After today, the southeastern
portion of our forecast area will see temperatures gradually
decrease as we head into the weekend, returning to near normal by
Saturday.

In response to the aforementioned shortwave moving through the Great
Basin, we will see the ridge axis shift over the western portion of
our forecast area on Thursday and Friday. This will result in a
gradual warming trend during across our central and western zones as
we head into the weekend. This high pressure will persist through
the weekend and into next week, allowing for hot and dry conditions
to continue across the region. While the southeastern portion of our
forecast area will see temperatures gradually "cool" back down to
near normal by Saturday, temperatures will rebound as we head into
next week due to the persistent ridging.

&&

.FIRE WEATHER...Dry conditions will continue across southern Nevada
with the strongest winds shifting into Lincoln County today as a
shortwave moves through the Great Basin. Relative humidities across
Lincoln County will bottom out in the single digits to low teens
this afternoon. This low humidity, combined with 15 to 20 mph
southwesterly winds gusting up to 30 mph will result in critical
fire weather conditions across Nevada Fire Weather Zone 461 today.
As such a Red Flag Warning is in effect this afternoon and
evening for zone 461. After today, we will see dry conditions
continue through the weekend and into next week but winds will be
lighter, which will help to mitigate fire weather risk.

&&

.AVIATION...For Harry Reid...For the 06Z Forecast Package...
Wind conditions on Wednesday will be similar as today, with gusty
southwest winds picking up in the late-morning to early-afternoon
with speeds around 25 kts. Gust speed and frequency will decrease
through the evening, with gusts falling off after sunset. Breezy
southwest winds will continue through the overnight period between 7
and 9 kts. No operationally significant cloud cover. Temperatures
will increase above 100 degrees between 17 and 05Z.

For the rest of southern Nevada, northwestern Arizona and
southeastern California...For the 06Z Forecast Package...Wind
conditions on Wednesday will be similar as today, with gusty
southwest winds picking up in the afternoon around 25 kts for Las
Vegas Valley and Colorado River Valley TAF sites and gusty west
winds picking up in the evening around 30 kts for KDAG. KBIH will
gust from the west-southwest this afternoon before veering to the
north-northwest around sunset. No operationally significant cloud
cover.
&&

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

&&

$$

DISCUSSION/FIRE WEATHER...Stessman
AVIATION...Soulat

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