Version:  Current  |  Back 1  |  Back 2  |  Back 3  |  Back 4  |  Back 5  |
Hydrometeorological Discussion
National Weather Service / California-Nevada RFC / Sacramento CA
635 AM PDT Wed Sep 16 2026

...SCATTERED PRECIP NEAR THE CA/OR BORDER TODAY INTO THURSDAY...
...COOLER TEMPERATURES WARMING INTO NEXT WEEK...

.METEOROLOGICAL CONDITIONS (WED AM - TUE AM)...

The s/wv trof in the vicinity of Vancouver Island yesterday at this 
time has drifted southward and is beginning to settle over northern 
CA. Radar imagery indicates an area of scattered showers currently 
rotating on the downstream side of this feature moving northward 
from eastern Siskiyou and Modoc counties into southern OR. Over the 
past 6-hours ending at 16/13Z...gauge data indicates scattered light 
amounts in this area mainly near or less than 0.10-inch.

This area of low pressure is expected to spin over northern CA for 
the next 24 to 36 hours bringing scattered showers and t-storms 
primarily to the upper Klamath River basin and the higher terrain of 
far northern CA. Overall...totals should remain near or less than 
0.33-inch with the best totals falling across the upper Klamath 
River basin. Along with the scattered precip...cooler-than-normal 
temperatures are anticipated to impact much of the region over the 
next couple days...except for northeast NV. Anomalies will run 5- to 
15-degF below seasonal normals.

To end the week...this area of low pressure will slowly make its way 
to the east-northeast before exiting the area on Saturday. A few 
showers may remain over far northern and eastern NV on Friday as the 
system passes overhead. Temperatures will also start to rebound and 
shift above normal for much of the area by the end of the weekend as 
a transitory upr ridge shifts inland. Then for Monday into Tuesday a 
weak area of low pressure will traverse the region with a slight 
chance of showers over the southern Sierra and parts of NV on 
Monday. 


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.