Area Forecast Discussion Issued by NWS Reno, NV
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.
&&
$$