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Hydrometeorological Discussion
National Weather Service / California-Nevada RFC / Sacramento CA
640 AM PDT Mon Jun 8 2026

...MAINLY LIGHT PRECIP FOR NORTHERN AREAS TODAY INTO EARLY TUE...
...WARMING TEMPERATURES UNDER BUILDING HIGH PRESSURE WED-SUN...

.METEOROLOGICAL CONDITIONS (MON AM - SUN AM)...

A s/wv trof and associated sfc low pressure is just off the Pacific 
Northwest coast this morning...tracking to the east and anticipated 
to shift inland later this afternoon. There also is quite an 
impressive fetch of tropical moisture advecting eastward...generally 
in the vicinity of 40N with PW values nearing 1.75-inches within the 
core of this feature. Look for this elevated moisture to reach and 
intersect the northern CA coast later today with increasing chances 
of precip over the higher terrain of northern CA and eventually 
northern NV. However...with the best forcing remaining to the north 
across the Pacific Northwest...only light to locally moderate precip 
amounts are expected today into early Tuesday. Overall amounts along 
the northern CA coast will be from 0.25- to 0.50-inch near Cape 
Mendocino to 1.00- to 1.50-inches over the Smith River basin. These 
amounts taper off quickly over the interior...generally less than 
0.25-inch except for closer to 0.50-inch for the crest of the 
southern OR Cascades near Crater Lake.

After this system exits to the east tomorrow...high pressure will 
quickly build over the eastern Pacific and nudge its way closer to 
the west coast. Look for increasing temperatures with afternoon 
highs reaching anywhere from plus 5- to plus 15-degF over seasonal 
normals. Models are hinting at the possibility for just enough 
moisture to advect northward across the southern Sierra...southeast 
CA...and southern NV for Friday into the weekend...which may bring a 
slight chance of very scattered convective showers to these areas. 
Amounts would be rather light.

Freezing levels this morning range from 9500-feet northwest to 
almost 15000-feet near the CA/MX border. As the strong high pressure 
builds off the CA coast...look for these to be above 14000-feet for 
much of the region with just over 16000-feet for coastal locations 
for the latter portions of the forecast period.


Please Note: This product may NOT be routinely updated.
Please refer to the following product issued by the CNRFC
www.cnrfc.noaa.gov/Daily-Briefing for a graphical summary of
weather and hydrologic conditions.