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. |