Tahoe Donner, California Weather Forecast Discussion

415
FXUS65 KREV 040832
AFDREV
Area Forecast Discussion
National Weather Service Reno NV
132 AM PDT Sat Oct 4 2025
.KEY MESSAGES...
* Temperatures remain below average this weekend through the
  start of next week with dry conditions.
* A warming trend will start Tuesday into at least Thursday with
  continued dry weather.
&&
.DISCUSSION...
* The low pressure responsible for two days of widespread rain and
  higher elevation snowfall is exiting the region today. With the
  exiting low, low level winds from the east to northeast are
  pushing some low clouds along the eastern slopes of the Sierra
  and into western NV. These low clouds will persist this morning
  before tapering off late morning. For today, we are on the far
  western edge of a larger scale trough that covers the western
  half of the US. With cooler north to northwest flow aloft, high
  temperatures will be upwards of 10-15 below average.
* By Sunday into Monday, a low pressure will drop south along the
  west coast on the periphery of the aforementioned larger scale
  trough. This will not give us any precipitation. But, it will
  keep our high temperatures upwards of 10 degrees below average
  and low temperatures up to 5 degrees below average. These
  readings are more common for mid-October.
* By late Monday into at least Wednesday, high pressure moves into
  the area. Our temperatures will trend up around 5 degrees on
  Tuesday, and another 5 degrees on Wednesday. This returns us to
  normal readings for October 10th, which is the mid-70s in
  western NV and mid-60s for most eastern Sierra communities. By
  Thursday into next weekend, there remains high uncertainty in
  evolution of the synoptic pattern. Ensembles are still having
  big discrepancies in showing either a deep trough over the area,
  or weak ridging. For now, we`ll keep mostly dry conditions and
  temperatures that trend toward climatology. -McKellar
&&
.AVIATION...
* IFR/LIFR in freezing fog and ceilings at KTRK/KTVL until around
  16z. The eastern Sierra can also expect mountain obscurations
  in low clouds through around 16-18z. Otherwise, VFR conditions
  prevail today.
* Winds are overall light for all terminals today, with sustained
  east to northeast winds around 5-10 kts and gusts to 15 kts.
  -McKellar
&&
.REV Watches/Warnings/Advisories...
NV...None.
CA...None.
&&
$$

NWS REV Office Area Forecast Discussion