Area Forecast Discussion
Issued by NWS Reno, NV

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14

FXUS65 KREV 042105

Area Forecast Discussion
National Weather Service Reno NV
105 PM PST Mon Dec 4 2017


Strong and gusty east winds will continue into Tuesday morning
with rough conditions expected on Lake Tahoe. High pressure
amplifies over the region this week bringing inversions, cold
nights, light winds, and reduced air quality for valleys.



Gusty east winds continue across the Sierra ridgetops and west
slopes into Tuesday morning. Winds across the Sierra will peak
this evening with ridge wind gusts between 60 to 80 mph expected
from Lake Tahoe southward to Mono County. Lake Tahoe waters will
remain rough, particularly from about Glenbrook to Homewood where
winds channel through the gap in the Carson Range along Highway
50, with wind gusts of 40+ mph possible. As a result, a Lake Wind
Advisory remains in effect through Tuesday morning.

Thereafter, we will enter a prolonged period of high pressure as
an upper level ridge intensifies over California and Nevada. This
will set the stage for strengthening valley temperature inversions,
light winds and reductions to air quality. Weak winds and inversion
base heights around 7,000` will result in trapped pollutants through
valley areas with hazy conditions expected through the week.

Very dry air along with the inversions will result in cold temperatures
through the week with many locations in the teens and lower 20s
and coldest valleys into the single digits or below zero. Ensure
vulnerable communities as well as pets and livestock have shelter
from the cold. Fuentes

.LONG TERM...Friday and beyond...

With a large-scale ridge of high pressure remaining over the West,
there is little hope in getting significant precipitation into
northeast California or western Nevada for at least the next two
weeks, with no hope for precipitation at all in the next week. The
stagnant conditions under the ridge should lead to continued hazy
valley visibilities, especially when looking slantwise/towards
mountain slopes.

Winds are expected to remain light for valleys and slopes late this
week through at least the middle of next week, with some persistent
easterly gradient flow over the Sierra crest as surface high pressure
remains over the interior West. -Snyder



Gusty east winds along the Sierra ridgetops continue through Tuesday
morning. Sustained northeast to east winds of 45-55 kts with gusts
of 60-75 kts across Sierra ridges will cause turbulence and
mountain wave activity along the Sierra crest and through the west
slopes through Tuesday morning before diminishing after 18z.

The winds are likely to mitigate widespread fog development, however
patchy fog is possible through the Martis Valley, including KTRK,
the next several nights/early mornings.

High pressure will then build with light winds and valley inversions
strengthening for the remainder of the week. Some minor reductions
in visibility may be possible as hazy conditions develop below
about 7,000` msl due to trapped pollutants below inversion level.


.REV Watches/Warnings/Advisories...
NV...Lake Wind Advisory until 10 AM PST Tuesday NVZ002.

CA...Lake Wind Advisory until 10 AM PST Tuesday CAZ072.



For more information from the National Weather Service visit... is the U.S. government's official web portal to all federal, state and local government web resources and services.