Chalfant Valley, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

866
FXUS65 KREV 182054
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
154 PM PDT Wed Jun 18 2025

.KEY MESSAGES...

* The hottest temperatures of the next week occur today, with
  moderate HeatRisk today and Thursday.

* Another round of even stronger winds return Thursday and Friday
  with more fire weather, recreation, travel and aviation
  concerns.

* Continued cool, dry pattern will continue through at least the
  start of next week.

&&

.DISCUSSION...

Summer heat continues today, with high temperatures approaching the
upper 90s for western Nevada and upper 80s to near 90 for Sierra
valleys. We are not expecting records to be broken or even tested,
as the record high for the Reno-Tahoe International airport site
on today`s date occurred in 1985 with a high of 101 degrees. Today
will be the hottest day in our stretch of warm weather, with
evening winds picking up, bringing gusts up to 25 mph.

*   INCOMING SYSTEM: A deepening trough will approach the Pacific
    Northwest for the weekend, ushering in some drastic changes to
    our weather pattern. Strong gusty winds and low relative
    humidities will be present Thursday and Friday, with Red Flag
    Warnings hoisted across much of western Nevada. See the Fire
    Weather section below for details. Other concerns with the
    gusty winds include bumpy flights, choppy lake waters,
    troublesome travel and recreation and potential for blowing
    dust downwind of desert sinks. Winds will increase out of the
    west-southwest Thursday, approaching 50-60 mph for wind prone
    areas, ridges will gust to near 70-80 mph, while leeside
    valleys will endure 40-45 mph gusts. This activity lasts into
    Friday evening, when we start to see the front drape across NE
    California. Cooler air will accompany this anomalously deep
    trough for June, with highs on Friday in the upper 70s to mid
    80s for western Nevada and 50s and 60s across the Sierra.
    Showers will filter into NE California and eventually some
    areas of far northwestern Nevada. Showers should be light, but
    a 30-60% chance exists along a line north of I-80, from
    Susanville through Gerlach and Pyramid Lake. Chances for
    thunder on Friday morning will be greatest for far northern
    Washoe County, but are only 5-10%. Higher elevations may see a
    mix of rain/snow, but the recent warmth will prevent any
    accumulation of slushy snow. Showers will begin to exit as the
    front moves east by early Saturday. Left behind will be some
    of the coolest temperatures we`ve seen since summer arrived.
    Western Nevada will chill out in the 60s, while portions of
    the Sierra may see highs in the 40s. Winds will also begin to
    decrease Satruday as the jet advects east over the Great
    Basin.

*   SUNDAY INTO MONDAY: Temperatures will attempt to moderate for
    Sunday, bringing a similar set of highs as Friday, with much
    less wind and clearing clouds. Monday, a return to widespread
    80s for western Nevada and 60s to 70s for Sierra communities.

*   LATE JUNE: A persistent weak trough pattern will linger into
    the middle of next week, keeping temperatures cool with
    afternoon breezes. Warming begins to return toward the end of
    next week, approaching our seasonal norms. Despite the trough
    presence, no precipitation is expected. HRICH

&&

.AVIATION...


*   VFR conditions today, with wind this afternoon westerly at
    10 kts, gusting to 25 kts.

*   Westerly winds increase Thursday, with speeds of 15-25 kts
    widespread, and gusts to 35 kts. Friday winds increase more,
    with ridge winds approaching 65 kts. This will increase the
    likelihood of LLWS and mountain turbulence both days, with
    Friday being the more intense day. HRICH

&&

.FIRE WEATHER...

*   Thursday we will see westerly winds increasing, the highest
    gusts will arrive for Friday, with Saturday`s winds moving
    south. Widespread wind gusts up to 45 mph for leeside valleys
    on Thursday, with wind prone areas seeing up to 60 mph and
    ridges as gusty as 70 mph. Friday, widespread gusts continue,
    increasing leeside valleys to 50 mph, wind prone areas to 65
    mph and ridge gusts to 80 mph. Coupled with low relative
    daytime humidity ranging 5-15% and poor overnight recoveries
    around 20-30%, we have issued a Red Flag Warning for Thursday
    and Friday. The Storm Prediction Center in Norman, Oklahoma
    has included our area in the elevated to critical fire
    conditions in the Fire Weather Outlook for Thursday, and we
    would not be surprised to see our area included again for
    Friday and potentially Saturday for areas mentioned below.
    Conditions on Saturday will be monitored, with the caveat
    being the frontal passage and how far south the associated
    moisture will travel. Saturday will have 3-6 hours of elevated
    to critical fire weather conditions for Mineral, Mono,
    southern Lyon and southern Alpine counties. This area may be
    considered for a Fire Weather Watch, but headlines may suffice
    if enough moisture moves over the area. HRICH

&&

.REV Watches/Warnings/Advisories...
NV...Red Flag Warning from 1 PM Thursday to midnight PDT Friday night
     NVZ420-421-423-429-458.

     Wind Advisory from 11 AM to 11 PM PDT Friday NVZ001>005.

     Lake Wind Advisory from 1 PM to 9 PM PDT Thursday NVZ001-003-004.

CA...Red Flag Warning from 1 PM Thursday to midnight PDT Friday night
     CAZ274-278.

     Wind Advisory from 11 AM to 11 PM PDT Friday CAZ071>073.

     Lake Wind Advisory from 1 PM to 9 PM PDT Thursday CAZ073.

&&

$$