Hydrometeorological Discussion National Weather Service / California Nevada RFC / Sacramento CA 725 AM PDT Sun Apr 14 2024 ...ONE MORE DAY OF COOLER AND UNSETTLED... ...DRY AND WARM FOR THE UPCOMING WORK WEEK... .METEOROLOGICAL CONDITIONS (SUN AM - SAT AM)... Another 24 hours of cooler and unsettled conditions on tap as a vertically stacked system currently moving inland along the central CA coast slowly shifts off toward the east across the southern Sierra and then eventually extreme southern NV before exiting to the east over the 4-Corners region on Monday. Two areas of precip this morning with the first focusing on areas along the central coast down to Point Conception and inland over the southern San Joaquin Valley and adjacent Sierra locations...in close vicinity of the primary circulation moving inland. The next is on the northern edge of the cyclonic flow where an area of convergent flow is generating precip dropping southwest across northern CA almost down to the I-80 corridor...while showers over northern NV are rotating from southeast to northwest. Through this afternoon...precip near the CA/OR border will focus mainly over the upper Klamath River basin and the northeast CA Plateau...while down south the area of precip closer to the primary circulation will move across the extreme southern Sierra and transverse mountains between eastern Santa Barbara county across Los Angeles county. Then overnight into early Monday...precip will be on the decrease as the upr low moves east and drier north to northwest flow begins to set up across the region as an upr ridge builds over the eastern Pacific. Freezing levels this morning are lowest across northern CA from 3500- to 4500-feet and then 4000- to 5500-feet for central CA. Inland and south where the coldest air has yet to filter overhead...these still are elevation with 7000- to 9000-feet across eastern NV down toward the southeast CA deserts. As the upr low moves inland...cooler air will make it over NV into early Monday with freezing levels down to 5500- to 7000-feet...slightly higher for the southeast CA deserts. Warmer air will already be making its way along northern/central CA coastal areas...with freezing levels bouncing back closer to 8500- to 9500-feet. Through the week...these will rebound across the entire region...ranging from 8000-feet well north and east to just over 14000-feet along the CA/MX border. Much of the upcoming work week will be dry with warmer temperatures on tap as the upr ridge aligns itself along or just off the west coast with flow generally west to northwest. Models are hinting at the possibility of a very weak disturbance moving through the flow across central/southern CA and southern NV on Friday...but right now...it appears as if at best there will be a few build ups over the southern Sierra on Friday afternoon with a rogue shower or two developing near the crest. |