Marine Weather and Tide Forecast for Lee Vining, CA

DISCUSSION

According to the latest RAP analysis of the upper air pattern, the axis of a trough over the NW CONUS is now to the east of the CWA this morning. Model guidance projects the upper trough continuing to move eastward today and yielding a northwesterly flow flow over the CWA With this setup above, the forecast shows that this morning's cloud cover expects to dissipate by the afternoon hours.
As a result, daytime high temperatures will be similar to those experienced on Monday if not a few degrees warmer with some diurnal heating. W NV and NE CA valleys will have high temperatures ranging between the middle 70s and lower 80s today while Sierra communities will see highs between the middle 60s and the lower 70s. Precipitation chances will be virtually zero today with afternoon breezes gusting up to around 25-30 mph out of the west to northwest.

Going through the remainder of the week and into the beginning of next week, a ridge builds over the western CONUS behind the trough with high pressure over the Western Pacific. This feature will allow for dry conditions as well as temperatures to rise to around or slightly above seasonal normals on Wednesday. Temperatures continue a warming trend and reach up around 10-15 degrees above June normals on Friday and through the weekend. NE CA and W NV valleys currently have around a 70-90% chance of high temperatures over the 90 degree mark beginning on Friday that lasts at least through Monday. Sierra communities are seeing the same chances for high temperatures over the 80 degree mark during the same period with some locations potentially reaching the middle to upper 80s.
The latest NWS HeatRisk product continues to show widespread minor to moderate HeatRisk especially in the valleys on Friday through the weekend. Please keep this in mind if you have outdoor plans later this week, especially if you are sensitive to heat. However, rain does not expect to ruin any outdoor activities through the rest of week into the beginning of next week with precipitation chances currently forecast near zero as the dry pattern prevails. -078

AVIATION

Following MVFR ceilings around KTRK and KTVL this morning, VFR and dry conditions look to prevail for the region today and tonight. Any morning cloud cover expects to dissipate by around 09/18-19Z leaving clear skies through the remainder of the day.
Afternoon breezes gusting up to around 15-20 kts are forecast today with winds decreasing by around 10/03-04Z. -078

REV Watches/Warnings/Advisories
NV...None.
CA...None.