Hydrometeorological Discussion National Weather Service / California-Nevada RFC / Sacramento CA 620 AM PDT Wed Aug 19 2026 ...INCREASING CHANCES OF SHOWERS/T-STORMS OVER E NV AND SE CA STARTING TOMORROW THROUGH THE WEEKEND... ...TEMPERATURES HOVERING AROUND AVERAGE THROUGH THE PERIOD... .METEOROLOGICAL CONDITIONS (WED AM - TUE AM)... The upper ridge over the Four Corners has slowly drifted westward towards CA/NV as an upper low continues its approach to the PacNW. The creeping ridge is expected to bring temperatures over parts of CA and much of NV up to 10 deg F above normal the next couple of days while the low keeps coastal temperatures over nrn/central CA closer to normal. As the low approaches, it will push the ridge back inland keeping conditions near normal the rest of the period. Models continue to show increasing mid level moisture and instability over se CA and NV towards the end of the week. Minimal chances of showers/thunderstorms for eastern NV today with increasing chances there and over se CA starting tomorrow. Possible showers/thunderstorms may include parts of the Sierra over the weekend as well. Another low, this time dropping in from the Gulf of Alaska should continue the pattern of offshore troughing and inland high pressure into early next week. Freezing levels expected around 13.5-17.5 kft through most of the period with some fluctuations. 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. |