Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 231003

Area Forecast Discussion
National Weather Service Reno NV
303 AM PDT Mon Oct 23 2017


High pressure continues to build across the region through midweek.
Well above seasonal high temperatures are on tap through the week
with moderate to strong overnight temperature inversion.



A strong ridge of high pressure will continue to build over the
west coast through midweek. As dry and warmer air moves in aloft
daytime high temperatures will rise to 10-15 degrees above
seasonal averages with moderately strong overnight temperature
inversions. By Wednesday, temperatures in the valleys could reach
near 80 degrees. For Reno, that would be about 3 degrees shy of
breaking the high temperature record set in 1959.

Most areas will see light east winds today and Tuesday with the
one exception being along the Sierra crest. Strong surface
gradients along west slope of the Sierra are creating gusty winds
which are currently gusting 35-40 mph. The gradient will weaken
some during the afternoon and regain strength again tonight.

.LONG TERM...Thursday through Sunday...

The only adjustments that were made to the inherited extended
forecast were to raise high temperatures slightly through the

Overall...the model simulations have changed little in the past 48
hours. An upper level short wave presses south-southeast into the
Eastern Great Basin/Intermountain West early Thursday. This will
shift winds aloft and near the surface to north-northeast and bring a
few degrees of cooling. The trend has been for the the core of the
cooler air to be farther east. While it is not out of the realm of
possibility that this feature could carve a path farther west...most
simulations do not support such a solution. We will raise high
temperatures slightly for Thursday and Friday and show a slight
decrease in winds aloft over the ridges.

Ridging rebuilds over the region by early Saturday and persists into
Sunday. This will result in warming aloft and at the surface.
Morning inversions should give way to moderate mixing each
afternoon as high temperatures peak well above normal.

The models are hinting at another wave dropping south into northern
CA/NV by early next week...but confidence is currently low that
any precipitation will develop with this feature.



Ridging in place through midweek will keep winds relatively light at
the surface each day. Gusty winds over the higher ridges early
this morning and again late tonight could result in turbulence
above and west of the ridgelines.

VFR conditions are expected for most areas. The only possible
exception will be the Martis Valley in the vicinity of KTRK where
patchy ground fog/freezing fog in likely each night and early
morning. This fog could reduce visibilities to less than 1/2 mile
at times...but should become less prevalent as the week


.REV Watches/Warnings/Advisories...


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