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AGUS76 KRSA 052002

HMDRSA



Hydrometeorological Discussion

National Weather Service / California Nevada RFC / Sacramento CA

130 PM PDT Fri Apr 5 2024



...COOL AND SHOWERY TODAY THEN SCATTERED SHOWERS MAINLY OVER THE 

NORTH FOR THE WEEKEND...

...DRIER AND WARMER NEXT WEEK......



.METEOROLOGICAL CONDITIONS (SHORT TERM: FRI PM - MON AM)...



Forecast still on track for cool and showery conditions with only a 

little increase (around a tenth of an inch or less) in the precip 

amounts over the Srn Sierra and San Bernardino Mtns into the San 

Diego Mtns and over Nrn and Central NV this afternoon and evening 

and near the ORCA border into the Shasta Basin Saturday evening. 



Low pressure and associated trough shift east through the region 

bringing cool and showery conditions into this evening. Isolated 

thunderstorms are also possible today. Precip amounts will be 

variable due to convective nature. Heaviest amounts around 0.25-0.75 

with local amounts around an inch expected over the Big Sur Coast 

and along the Srn Sierra and the San Gabriel and San Bernardino Mtns 

and down into San Diego County mountains and over mtns of Nrn and 

Central NV. 



Weak shortwave ridge moves in as the system moves off to the east 

overnight into Saturday morning with NW flow. The weak ridge shifts 

to the east as a weak shortwave trough along the Pac NW coast and 

into Nrn CA Saturday afternoon and moves inland Saturday night and 

through Nevada on Sunday. Generally light precipitation (less than a 

third of an inch (highest over Srn Or Cascades and Smith and Shasta 

Basin and over Ruby mtns) over Srn OR and Nrn CA Coast and into the 

Shasta Basin and over far Nrn NV and NE NV Saturday into Saturday 

night. Precip amounts for Sunday generally less than a tenth of an 

inch possible mainly along the Nrn and Central CA coast and higher 

terrain and along the Sierra and over Nevada. 



This system brought in cold air with max temperatures generally 10-

25 degrees below normal again today. Record low max temps possible 

again today. Overnight minimum temps generally below normal up to 15 

degrees tonight with a few record temps possible. Temps warm to 

around 5 to 15 degrees below normal Saturday and around normal to 10 

degrees below Saturday night. Max temps generally warm to near 

normal to around 15 degrees below normal (coldest over Srn Sierra 

and NV) on Sunday.



Freezing levels generally around 3000-4000ft over CA and around 4000-

5000ft over far SE CA and NV this afternoon rising to around 4000-

6000ft over the Sierra and to 7000ft and higher over Srn CA and 5000-

7000ft over NV Saturday afternoon and around 5000-8000 ft on Sunday 

afternoon.





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



A s/wv trof will be moving east of the area across the Desert 

Southwest...while an offshore upr ridge moves from the eastern 

Pacific across the western US. This will bring the region dry 

conditions with temperatures warming through the period. By the 

latter half of the week...the region may see some of the warmest 

days of the year. No changes necessary to the afternoon forecast 

issuance.



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







Osborne/Kozlowski



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