Area Forecast Discussion
Issued by NWS Reno, NV

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

FXUS65 KREV 250934

Area Forecast Discussion
National Weather Service Reno NV
234 AM PDT Mon Sep 25 2017


Clear skies and light winds are expected through the coming week. A
ridge of high pressure along the west coast is gradually getting
stronger leading to a slow warming trend. A weak upper level wave
will brush by the region early next week and could bring a few
showers to the Oregon border.



Aside from some freezing fog near Truckee and the Sierra Valley,
benign conditions remain on tap for the near future as high
pressure continues to build along the California coast. The
warming trend increases more rapidly starting Tuesday afternoon as
generally light northerly winds shift more easterly due to an
inland shift of the ridge axis. Afternoon highs will be quite
comfortable warming from the upper 60s for western Nevada and low
60s in the Sierra today to the mid/upper 70s and around 70
degrees, respectively, by Wednesday.

Otherwise, winds along the Sierra and Carson range continue to
gust 30-40 mph this morning with some breezy conditions over Lake
Tahoe. The main concern will be wind chills along the ridges for
any hikers or campers. Winds will decrease tonight and tomorrow as
the pressure gradient loosens with higher pressure building into
the region. Boyd

.LONG TERM...Thursday onward...

The forecast remains tranquil for the end of the work week into the
weekend with slightly above normal temperatures, light winds, and no
precipitation expected. This is all due to an area of high pressure
across the west. The ridge will amplify and flatten throughout the
period due to passing weak systems in the Pacific Northwest, but
this won`t do much to the appreciable weather in the eastern Sierra
and western Nevada. By the start of next week, a few showers are
possible near the Oregon border due to one of these waves, but
chances are only about 15 percent at this point.

Longer range forecast models are still indicating the chance at a
pattern change by the middle into the end of next week, but the past
couple of operational model runs are differing from previous runs,
taking longer for this change to take place. Looking at ensembles,
there is a lot of spread with some showing a deep trough approaching
the west coast during the time frame, while others brush a piece of
energy by to the north with more zonal flow over the region, with
the main trough slower to reach the west. In any case, keep in mind
there is the potential for cooler and wetter weather toward the end
of the first week of October. -Dawn



Widespread VFR conditions outside of patchy morning freezing fog in
the Martis and Sierra valleys, which includes KTRK. While surface
winds will be generally light and northeasterly, ridges along the
Sierra crest continue to gust to around 30 kts from the east. This
may create pockets of turbulence from the crest westward. -Dawn


.REV Watches/Warnings/Advisories...


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.