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Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
705 AM PDT Wed May 27 2026

...COOLER WITH SCATTERED PRECIP THE NEXT SEVERAL DAYS...
...DRYING THIS WEEKEND WITH WARMING INTO NEXT WEEK...

.METEOROLOGICAL CONDITIONS (WED AM - TUE AM)...

The cool upr low that drifted south-southeast from the central OR 
coast yesterday has settled over the vicinity of Bishop CA this 
morning...bringing below normal temperatures on the order of minus 
10- to minus 25-degF under seasonal normals and areas of scattered 
showers and thunderstorms that primarily impacted portions of 
northern CA over into northwest NV. Given the convective nature of 
the precip...some areas saw a few hundredths of an inch while those 
locations under stronger cells surpassed the 1.00-inch mark.

Today will see the upr low wobble around a similar location to 
its present spot with scattered precip impacting the region with the 
best totals from the Trinity Alps...the southern Cascades...and much 
of the Sierra spreading into portions of western NV. SPC does 
highlight this area for general thunderstorms over the next 24 
hours. This convective nature to the precip will make specific 
amounts tough to predict...but averaged amounts anywhere from 0.25- 
to 0.75-inch are anticipated.

Into Thursday...the upr low will initially remain relatively 
stationary before finally starting to drift off toward the east as a 
kicker system moves toward the Gulf of Alaska and northeast Pacific. 
Individual disturbances rotating around the upr low will bring the 
best opportunity for precip across a couple areas...including the 
southern Cascades and length of the Sierra...as well as an area 
along the central CA coast from the Santa Cruz to the Santa Lucia 
mountains. Again...areal averaged amounts will generally range from 
0.25- to 0.75-inch. 

The upr low will move over the Great Basin on its way toward the 
Wasatch on Friday with precip shifting eastward and primarily 
focused over northeast CA and the northern portions of NV with the 
best amounts during the first half of the day. Finally into the 
weekend and early next week...the system will lift northward to the 
northern Rockies...while heights start to increase over CA and NV. 
This will bring drier conditions to the region and warming 
temperatures. 

Freezing levels this morning are lowest across northern/central CA 
into western NV...generally ranging from 6500- to 7500-feet and 
increasing as distance from the upr low becomes greater. These 
overall numbers will continue through today before starting to 
increase tomorrow as the system weakens a bit and starts to move off 
toward the east. By late Thursday into Friday...look for freezing 
levels to range from 8000- to 9000-feet near the core of the system 
over Death Valley NP...increasing at greater distances from the 
primary circulation. Then through the weekend as heights build...the 
freezing levels will jump and range from 10000-feet north to about 
14500-feet south. Into next week...by Tuesday morning...look for 
a range of about 13000- to 15000-feet.


Please Note: This product may NOT be routinely updated.
Please refer to the following product issued by the CNRFC
www.cnrfc.noaa.gov/Daily-Briefing for a graphical summary of
weather and hydrologic conditions.