Marine Weather and Tide Forecast for Bishop, CA

DISCUSSION
through next weekend.

Despite the high cloud cover today, regional temperatures are running several degrees warmer than this time yesterday thanks to a fairly sharp high pressure ridge across the Four Corners and increasing heights. The expectation remains for temperatures today and Monday to top out several degrees above normal, with less cloud cover expected tomorrow and some enhanced surface mixing thanks to increasing southwesterly breezes.

Changes are on the horizon as a deep cutoff low approaches California Tuesday morning and crashes into the Great Basin by Wednesday morning. Gusty southerly winds will flirt with wind advisory thresholds as early as Monday afternoon across the Owens and Fish Lake Valleys, but the main show will be on Tuesday as the low itself moves in. Rapid height falls and a belt of 50-60 knot southerly 700mb winds will take aim our western zones through the afternoon hours, and spread eastward through the evening and overnight. The ECMWF Extreme Forecast Index (EFI) has suggested unusually strong winds across central Nevada for several days now and meteograms around the Tonopah area suggest wind gusts solidly in the 50-60 mph range. Additional wind headlines will likely be needed for the remainder of the Mojave Desert and Lincoln County region but we will allow some time for the high-resolution forecast domain to populate before making additional decisions.

Aside from the wind, precipitation chances generally remain confined to the Sierra and southern Great Basin zones, with only very light precipitation totals outside of the Sierra peaks. As the low moves away Wednesday, cooler temperatures can be expected in its wake with a slow rebound to near normal temperatures late week and into the weekend. Guidance beyond Friday begins to diverge as a weak trough off the SoCal coast may begin to influence the region, with some modest cooling possible.

AVIATION
For Harry Reid
For the 00Z Forecast Package
Winds will remain generally variable under 7 knots through the overnight period before becoming light and variable between 10-17z.
After 17z, southeast winds (130-150 deg) are forecast to develop with occasional gusts to around 18 knots; however, there are indications that winds will shift to more of a southerly direction after 22z with gusts remaining around 18 knots. Overall, confidence is low-moderate in the overall timing and direction as winds may remain southeast or shift to the south earlier than expected. VFR conditions prevail, with increasing mid-level and high clouds with bases at or above 15kft.

For the rest of southern Nevada, northwest Arizona and southeast California
For the 00Z Forecast Package
Across the area, winds will generally remain around 5-10 knots, following typical directional patterns with some variability. In the Las Vegas Valley, south to southwest winds will develop after sunset with speeds generally 7 knots or less. Southeast to south winds will develop after 18z Monday with occasionally gusts to around 18 knots. Across the northern Owens Valley/KBIH, gusty up-valley winds 25-30 knots will remain before diminishing to less than 10 knots after 05z.
Southerly winds are expected to increase once again after 18z Monday with gusts 30-35 knots. Westerly winds 10-15 knots at KDAG overnight and early Monday before decreasing by early afternoon. Otherwise, VFR conditions prevail, with increasing clouds through tonight with bases at or above 15kft.

SPOTTER INFORMATION STATEMENT
Spotters are encouraged to report any significant weather or impacts according to standard operating procedures.