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000
FXUS65 KREV 141600
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
900 AM PDT Sun Apr 14 2024

.UPDATE...

With snowfall rates trending downward and conditions no longer
anticipated to reach advisory criteria, the Winter Weather
Advisory has been allowed to expire for Lassen, Eastern Plumas,
and Eastern Sierra Counties. There may be some lingering light
snow shower chances within the area going into the evening hours
tonight, but little to no additional accumulation is expected.
Please check on the road conditions and drive with caution if you
need to travel through the area today as roads may still be slick.

-078

&&

.SYNOPSIS...

A much cooler day is in store as locally breezy northwest winds,
clouds and scattered showers linger. As our weather system exits
Monday, temperatures will start a gradual climb with afternoon
highs 10 to 15 degrees above normal by mid to late week.

&&

.DISCUSSION...

* Satellite/radar imagery early this morning showed an upper low
  near the central CA coast with precipitation banding extending
  from the Basin and Range into northeast CA. A spotter report
  earlier in the night indicated snow accumulating above the
  valley floor northwest of Susanville and the current Winter
  Weather Advisory for snow above 5000` in Lassen County is on
  track. HREF indicates best snowfall rates as of this writing
  (1-2"/hr), but shows them decreasing through the morning hours
  as the best lift shifts west out of Lassen County.

* Showers will persist today, favoring the Sierra and northeast
  CA. Snow levels will remain in the 5000-5000` range, but the
  higher sun angle and more spotty nature of heavier showers will
  limit impacts to area roads by late morning and afternoon.
  Thunder chances will remain low with a 15% chance near the
  Oregon border. Showers will gradually taper this evening
  although low-mid clouds will hang back for awhile as the upper
  low exits. Partial clearing should occur overnight with a 20%
  chance for patchy freezing fog in Sierra valleys.

* SW-NW breezes will persist today/early evening which will
  combine with clouds. showers and daytime temperatures 10-20
  degrees below average to make it feel quite chilly for mid
  April. Temperatures will quickly rebound back to seasonal
  averages Monday afternoon.

* Balance of the week ahead favors a more spring-like feel with
  temperatures warming to 10-15 degrees above average mid-late
  week. Latest blended guidance indicates a bit less spread in the
  temperatures with 60s Sierra and 70s warmer lower valleys almost
  certain. The GEFS continues to show a light QPF signal along the
  Sierra crest by late week as instability builds while the ECS
  retains a drier scenario. For now, the official forecast
  reflects a dry forecast per the blended guidance.

Hohmann

&&

.AVIATION...

* Isolated-scattered showers will continue today, favoring the
  Sierra and northeast CA where occasional MVFR conditions and
  terrain obscurement will persist around showers. Thunder chances
  will remain low and mainly near the Oregon border (15% chance).
  Showers will gradually end tonight as the upper low begins to
  shift towards the Four Corners region.

* Breezy SW-W winds will persist, especially north of I-80 and
  along the eastern Sierra. Gusts will generally stay in the 20-25
  kt range through 03Z then decrease overnight. FL100 winds will
  be lighter today, generally SW-W 20-30 kt. FL100 winds will
  shift more northerly 25-35 kt tonight and Monday morning on the
  back side of the upper low for some light to occasionally
  moderate turbulence.

* Cloud cover will hang around through much of tonight but there
  is a 20% chance that enough breaks may occur for some patchy
  freezing fog 10-16Z at KTRK.

* A drier and warmer pattern is setting up for the week ahead with
  shower chances very low and northwest breezes gradually
  diminishing.

Hohmann

&&

.REV Watches/Warnings/Advisories...
NV...None.
CA...None.
&&

$$