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AGUS76 KRSA 032200

HMDRSA



Hydrometeorological Discussion

National Weather Service / California Nevada RFC / Sacramento CA

130 PM PST Sun Mar 3 2024



...SHOWERS ACROSS THE REGION TODAY WITH ISOLATED THUNDERSTORMS 

POSSIBLE MAINLY OVER NRN CA...

...PRECIP POSSIBLE OVER SRN OR AND NRN CA AND NRN NV MONDAY THEN 

SPREADING SOUTH INTO CENTRAL CA TUESDAY AND SRN CA AND NV WEDNESDAY 

THEN MAINLY DRY CONDITIONS THURSDAY AND FRIDAY...



.METEOROLOGICAL CONDITIONS (SUN PM - SAT AM)...



Lingering showers into this evening as the cool upper level trough 

moves through the region. Isolated thunderstorms possible mainly 

over Nrn CA. Increased amounts over Nrn CA a little for this 

afternoon and evening. Precip amounts will be variable with the 

showers. Precip should taper off overnight into Monday morning. 

Precip amounts through tonight generally less than half an inch 

except around 0.5-1.5 inches is expected on the NW CA coast and 

along the Nrn and Central Sierra. Freezing levels around 2500 ft 

near the ORCA border and around 3500 ft near I-80 and around 6000 ft 

for the Srn Sierra and 5000-7000+ over Srn CA this afternoon will 

lower to around 1500-2000ft near the ORCA border and around 3000 ft 

near I-80 and 4500 ft over the Srn Sierra overnight. 



A low moving south along the B.C. coast today moves inland into the 

Pac NW Monday into Tuesday. Another low over the Eastern Pacific 

moves to around 140W and 40N on Monday and approaches the CA coast 

around 130W 38N Tuesday afternoon and moves South along the CA Coast 

on Wednesday and onshore into Srn CA/Baja Thursday morning. Although 

the models differ in the track and timing of this low for low 

confidence in precip amounts and coverage. Precip will mainly be 

over Srn OR and Nrn CA and NV on Monday and spreading south into 

Central CA Tuesday and into Srn CA and Srn NV Wednesday. Precip 

amounts for Monday through Wednesday are currently forecast to be 

around 2-4 inches for the NW CA coast (around Cape Mendo and North) 

and 1-2 inches for Shasta Basin and Nrn Sierra and -

.5-1.5 inches for the Russian Basin and Central Sierra and 0.25-1 

inch for Central Ca coast and generally half an inch or less for Srn 

Sierra and Central Valley and Nrn NV (except up to 0.75 inches over 

higher mtns in Nrn NV). Generally decreased amounts for Monday and 

Tuesday over Nrn and Central CA and increased along the Central and 

Srn Ca coast Wednesday into Wednesday night. 



High pressure from the Eastern Pacific builds into the region 

Thursday into Friday for drier conditions.  A few lingering showers 

possible over Srn CA and Srn NV during the day Thursday.  A system 

approaches the CA coast late Friday which may bring some light 

precip to the Nrn Ca coast and west slope of Srn OR Cascades and 

into the Shasta Basin Friday night.  



Freezing levels generally around 3000 ft near ORCA border and 4000 

ft near I-80 and 6000 ft for the Srn Sierra on Monday and rise to 

around 4500 ft near ORCA border and 5500 ft near I-80 and 7000 ft 

for the Srn Sierra Tuesday and rise to around 5000-7000 ft on 

Wednesday and 7000 ft and higher Friday.



Max temperatures forecast to be around 5 to 20 degrees below normal 

today and Monday then near normal to 15 degrees below normal for mid-

week. Overnight temperatures around 5 to 15 degrees below normal for 

Srn OR and Nrn CA and near normal to 10 degrees below normal for 

most of NV and Central and Srn CA Sunday morning and below normal to 

around 15 degrees for most of the region Monday morning and near 

normal for Tuesday through Friday mornings (except north up to 15 

degrees below normal on Wednesday and Thursday mornings). 



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







Osborne



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