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Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
650 AM PST Tue Jan 20 2026

...DRY CONDITIONS THROUGH MID WEEK AS HIGH PRESSURE REMAINS 
OVERHEAD...
...SLIGHT CHANCE OF SHOWERS OVER SRN CA & THE SRN SIERRA THURS/FRI 
AS A LOW PASSES BY OFFSHORE...

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

High pressure will keep dry conditions across the region through mid 
week. Troughing just west of the current upper ridge will split off 
into an upper low west of CA into Wednesday. This system is then 
progged to move south offshore the rest of the week before weakening 
and heading inland through Baja into the weekend. As the low passes 
Point Conception Thursday, expect some scattered showers over the 
southern Sierra and across srn CA through Friday. There are still 
disagreements between the GFS/ECMWF though they've come closer 
together since yesterday. The GFS is now on board with dropping 
showers out of the low late this week instead of keeping things dry 
and timing looks more in synch as well. As the low opens into a 
trough and moves through Baja late Friday/Saturday additional 
troughing will descend into NV/CA from the PacNW/intermountain West 
keeping the eastern half of the region under a troughing pattern. 
Meanwhile another strong upper ridge will build in over the eastern 
Pacific over the weekend returning dry conditions to end the 
forecast period.

Amounts still expected to be fairly minimal at 0.10" or less for 
most areas seeing precip and locally 0.10-0.25". Freezing levels 10-
12.5 kft through mid week lowering the rest of the week down to 8-10 
kft Thurs and 6.5-9.5 kft Friday. Levels rising west to east into 
the weekend and lowering over NV down to 5-7 kft.


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.