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AGUS76 KRSA 291347

HMDRSA



Hydrometeorological Discussion

National Weather Service / California Nevada RFC / Sacramento CA

645 AM PDT Mon Apr 29 2024



...SYSTEMS CONTINUE TO BRUSH FAR NORTHERN AREAS THROUGH THE WEEK...

...QUESTIONS WITH DEPTH OF SYSTEM EXPECTED TO ARRIVE ON SATURDAY...



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



High pressure over the eastern Pacific off the CA coast...while the 

storm track remains to the north moving across BC and the Pacific 

Northwest. One of these disturbances is currently traversing areas 

to the north...with a second close on its heels west of Vancouver 

Island. The first s/wv trof may be deep enough to bring some 

scattered light precip to the crest of the southern OR Cascades and 

far northwest CA (mainly Smith River basin) today...while the next 

is a bit more shallow and may only spread a few hundredths of an 

inch to areas around Crater Lake on Tuesday before making its way 

toward the Great Basin. 



Wednesday will generally be between systems moving across BC and the 

Pacific Northwest with the next system that brings in a bit more 

moisture arrives on Thursday. The 29/00Z EC and CMC are starting to 

hint at the potential for some light precip making its way down to 

the CA/OR border area and far northern NV as this system moves 

inland across the state of WA and then moves off toward the 

southeast. The GFS still keeps precip north of the area on 

Thursday...as does the NBM...but felt with the trend of the other 

models to at least include some light amounts over the northern tier 

of the region.



Then for the upcoming weekend...models are definitely struggling 

with a system making its way from near the Aleutian Island southeast 

toward the west coast. The EC is much shallower and takes the 

feature across the Pacific Northwest...while the GFS and CMC form a 

much deeper cutoff low that either drops down the coast offshore or 

moves inland across northern CA. At this time...low confidence for 

the impacts from this system...and for now...followed closest to WPC 

and NBMEXP bringing some light precip across northern CA and to a 

lesser extent central CA on Saturday.





QPF graphics are available at www.cnrfc.noaa.gov/qpf.php







Kozlowski



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