Hydrometeorological Discussion National Weather Service / California-Nevada RFC / Sacramento CA 615 AM PDT Wed Oct 14 2026 ...WARMER AND MAINLY DRY THROUGH THE WEEKEND... ...TURNING COOLER WITH INCREASING CHANCES OF PRECIP MON-WED... .METEOROLOGICAL CONDITIONS (WED AM - TUE AM)... The slow moving upr trof shifting across the region has finally drifted east of the region...crossing the UT/NV border overnight on its way toward the 4-Corners region today before picking up its forward speed to the northeast. Behind this system...a fairly strong upr ridge is currently aligned along 130W and will make its way toward the western US for the remainder of the week. Also...a disturbance diving southward on the front side of this upr ridge will settle across extreme southern CA and northern Baja as it forms an upr low Thursday into Friday. This will primarily bring dry and warm conditions to the region with a slight chance of a shower or two across portions of southern CA and southern NV as a bit of higher moisture content air draw toward the region from Mexico in the cyclonic flow aloft. Look for afternoon temperature anomalies to run anywhere from plus 5- to plus 20-degF over seasonal normals...peaking on Friday. Through the weekend...the upr ridge will shift inland while the upr low opens up and ejects eastward toward the Desert Southwest in response to a deepening trof over the eastern Pacific. This system looks to bring cooler temperatures to the region with an increasing chance of precip from later Monday into the middle of the week. Still some questions on where exactly the upr trof digs...whether it be offshore...closer to the coast...or even inland. This will determine what areas have a better opportunity for precip. 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. |