Hydrometeorological Discussion National Weather Service / California-Nevada RFC / Sacramento CA 615 AM PDT Sat Sep 12 2026 ...SYSTEM SCRAPING NRN CA TODAY/SUN MAY BRING LIGHT PRECIP TO THE NORTH COAST AND THE CA/OR BORDER ALONG WITH BELOW NORMAL TEMPS... ...DRY CONDITIONS THE REST OF THE PERIOD AS A DRIER AIR MASS MOVES IN EARLY NEXT WEEK... .METEOROLOGICAL CONDITIONS (SAT AM - FRI AM)... An upper low continues to approach the PacNW this morning as high pressure remains entrenched over the desert southwest. The low will move inland across OR later today lifting into WA and ID tomorrow. As the system passes, a few light showers may fall across the CA/OR border and the north coast later today through Sunday morning. Amounts look fairly minimal at generally less than 0.10" and 0.10- 0.25" over the crest of the Cascades. This system will also kick off some cooling first over nw and central CA today before more widespread cooling for Sunday. Behind the low, drier air is expected to move in preventing any additional chances for precip. Troughing will remain overhead through mid next week keeping temperatures near to below normal for most areas. Into Thursday, models have an area of high pressure moving towards the PacNW from the Gulf of Alaska as the high pressure over the sw also expands into southern CA. Neither look to be carrying any moisture into the area at the moment keeping the forecast dry through the period. 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. |