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CNRFC Hydrometeorological Discussion

Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
830 AM PST Tue Jan 28 2020

...PERIODS OF LIGHT PRECIP IN THE NORTH...
...COLD SYSTEM WITH LIGHT TO MODERATE PRECIP FOR THE NORTH SUNDAY...

.METEOROLOGICAL CONDITIONS (SHORT TERM: TUE AM - FRI AM)...

Light showers should wind down for the most part of portions of 
northern CA/NV and southern OR today and an upper trough moves . 
across the region.  The next system features a weak front that 
should spread light precip across similar areas later Wed through 
Thu. Freezing levels 5000-8000 ft are expected. Totals today through 
tonight are expected to be 0.5-0.75" in the Smith basin and southern 
OR Cascades and lighter elsewhere. Totals with the next system 
should be 0.25-0.75" in the same areas and lighter elsewhere.  


.METEOROLOGICAL CONDITIONS (LONG TERM: FRI AM - MON AM)...

High pressure over the eastern Pacific will carry dry conditions 
into the start of the weekend. Late Saturday, however, a shallow 
trough is expected to move into the Pac NW, and the southern edge of 
the frontal band should extend down into the North Coast early 
Sunday. This would bring light precip to Northern areas through the 
day Sunday, pushing into NV early Monday. While precip intensity 
should be low, totals of about 0.5-1" are expected over the Smith 
and Upper Klamath basins, with 0.25" or less over the coast down to 
the Russian, over Shasta, and the Northern Sierra. Freezing levels 
during this time are expected around 2000-3000 ft near the OR/CA 
border Sunday, and around 4000-5500 ft over the Northern Sierra.