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AGUS76 KRSA 101525

HMDRSA



Hydrometeorological Discussion

National Weather Service / California Nevada RFC / Sacramento CA

830 AM PDT Fri May 10 2024



...WARM TEMPERATURES INTO MID WEEK NEXT WEEK...

...ISOLATED SHOWERS/T-STORMS MAINLY OVER CENTRAL AND SRN SIERRA AND 

EAST OVER NV IN THE AFTERNOON AND EVENINGS THROUGH TUESDAY... 



.METEOROLOGICAL CONDITIONS (FRI AM - THU AM)...



Upper level ridge over the Eastern Pacific and into the Pac NW and 

into Nrn CA as an upper low is centered around the Ca/NV border 

today. Isolated showers/thunderstorms mainly over Srn Sierra and 

over most of NV today with a stray shower or two possible over San 

Gabriel and San Bernardino Mtns.  The low shifts to the east into 

the four corners region on Saturday as high pressure builds in from 

the Eastern Pacific.   Isolated showers possible mainly over Ern NV 

on Saturday as the low moves off to the east. Ridge moves over the 

region on Sunday as trough is along the west coast with a shortwave 

headed towards B.C./Pac NW and a weaker disturbance around 130W and 

36 N off the CA coast in the Eastern Pacific. Isolated 

showers/thunderstorms possible over Central and Srn Sierra and near 

the ORCA border on Sunday. Ridge of high pressure over Eastern 

Pacific approaches the west coast as the weak disturbance moves into 

Srn CA and the shortwave trough through the Pac NW Monday into early 

Tuesday.  Isolated showers and thunderstorms mainly over the Central 

and Srn Sierra and possible over NV on Monday. high pressure builds 

into the region from the eastern Pacific as the weakening disturbance 

moves into AZ and shortwave trough digs into the great Basin 

Tuesday. Isolated showers and thunderstorms possible over the 

Central and Srn Sierra and over NV on Tuesday. The majority of 

solutions show ridge over majority of the region on Wednesday but 

some show the shortwave trough may retrograde into NV/Srn Ca on 

Wednesday. The forecast is dry for now but Srn Sierra and Srn NV 

could see a shower if trough does move into region.  Models continue 

to vary for late week into next weekend with how strong ridge will 

be (EC has short wave troughs moving through PAC NW with stronger 

trough along the west coast next Sunday) but may weaken some for 

next weekend. 



QPF amounts will be variable due to convective nature, but generally 

a tenth of an inch or less with locally higher amounts (up to around 

0.5 inches) possible should thunderstorms develop. Freezing levels 

generally 10000 ft and higher into mid-week.



Max temperatures around 5 to 15 degrees above normal for Srn OR and 

Nrn and Central CA and near normal to around 10 degrees below normal 

for Srn Ca and SE CA and over NV this afternoon and warming to 

around normal over Srn CA and SE CA and over NV Saturday afternoon. 

Max temps generally above normal up to 15 degrees over most of the 

region Sunday afternoon except near normal along the CA coast. Temps 

similar on Monday except more cooling over the coast on Monday and 

along the Central and Srn CA coast up to 10 degrees below normal on 

Tuesday. Max temps rise to 5 to 20 degrees above normal on Wednesday 

except near to around 10 degrees below normal for the Central and 

Srn CA coast. Possible cooling for next weekend as trough may move 

into region.  Overnight temps generally near normal to around 15 

degrees above normal tonight into Wednesday night. 





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







Osborne



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