Bieber, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

871
FXUS65 KREV 062135
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
235 PM PDT Sun Apr 6 2025

KEY MESSAGES...

* A trough brushes the region on Monday, bringing chances for
  precipitation in the Sierra and breezy winds areawide.

* Warming trend continues most of next week, with widespread 70s
  to mid 80s in the valleys, and 60s in the mountains.

* Another brush-by system affects the region next weekend as
  precipitation chances increase across northeast California.

&&

.DISCUSSION...

Today started off with occasional high clouds with partial
sunshine, light winds, and slightly above average temperatures
region wide. This was all due to a sharply amplified upper ridge
shifting east into the Great Basin region. As the upper ridge axis
moves further east, the extensive layer of thinly veiled upper
Cirrus will thicken in the increasing southwest upper flow that
precedes an upper trough pushing into the Pacific Northwest this
evening. As this system lifts northeast it will drag a brush-by
upper short wave northeast across NE-CA and the Sierra to the Lake
Tahoe basin through Monday morning.

This weakly forced system will quickly lift northeast across NE-CA
and the Sierra, and continue tracking east-northeast into western
NV. Portions of NE-CA and the Sierra Crest to the Lake Basin Basin
will see increased shower chances (50-70%) starting late tonight
through Monday afternoon. There is even a non-zero chance (<10%) for
isolated thunder Monday afternoon across the higher terrain areas
across NE-CA.

* Overall, rain showers will increase across NE-CA close to
  midnight, and spread east into the Surprise Valley and far
  northern Washoe County, and south to the Tahoe Basin with Mono
  County seeing little in the way of any measurable precipitation.

* Snow levels will stay mostly 7000 and above with only light,
  slushy snow accumulations of one or two inches topping the highest
  points around the Carson Range through Monday morning. Rainfall
  totals will range from a trace to 0.30 inches with little
  spillover into western NV.

* Ridge winds will also increase to 70 mph overnight into Monday
  with generally enhanced west-southwest breezes mixing down across
  the Sierra into western NV. Winds are projected to gust 30-40 mph
  mostly north of highway 50. This will have impacts to boating/lake
  conditions, especially for Lake Tahoe and Pyramid Lake before the
  trough exits the region by Monday evening.

* Therefore, lake wind advisories have been hoisted for Lake Tahoe
  and Pyramid Lake late morning through early evening Monday.
  Advisory details are available at www.weather.gov/rev/.

What follows is a predominately zonal flow aloft across CA into the
western US overnight Monday through Tuesday. By midweek, high
pressure will amplify over the West Coast through the remainder of
the week. The high pressure building across the region will bring
continued dry conditions, light winds, and unseasonably warmer
temperatures into the Sierra and western NV. Thursday Friday are on
track for the warmest days of the week, with upper 70s to mid 80s
across parts of western NV to include eastern Lassen County
valleys. Highs in the mid 60s to low 70s will prevail for most
Sierra communities with Mono County joining the Springtime
temperature club.

Ensemble simulations are showing an increasing chance for
precipitation next weekend across NE-CA and NW-NV from another brush-
by upper trough and attendant cold front tracking into the western
US. Still a little ways out in the forecast window, so any specifics
with regards to rainfall amounts and storm trajectory remain very
uncertain.

&&

.AVIATION...

* Other than broken high-level cloudiness covering the region, VFR
  conditions and light winds will prevail today into the evening.
  A weak upper trough tracking east-northeast across NE-CA into WRN-
  NV will increase the FL100 southwest flow aloft to 45-55 kts
  overnight through Monday. Look for periods of LLWS and mountain
  wave turbulence for Sierra and WRN-NV terminals.

* Showers and mountain obscurations accompanying this system will be
  confined over the higher terrain from NE-CA south to the Lake
  Tahoe basin. Occasional periods of MVFR conditions will start
  early Monday morning 10-12Z, and continue into the afternoon. With
  snow levels dropping no lower that 7000 feet, precipitation for
  Sierra terminals KSVE-KTRK-KTVL will be mostly light rain with a
  brief changeover to a mix with snow about daybreak. -Amanda

&&

.REV Watches/Warnings/Advisories...
NV...Lake Wind Advisory from 11 AM to 11 PM PDT Monday NVZ002-004.

CA...Lake Wind Advisory from 11 AM to 11 PM PDT Monday CAZ072.

&&

$$