Hydrometeorological Discussion National Weather Service / California-Nevada RFC / Sacramento CA 620 AM PDT Fri Jun 12 2026 ...HIGH PRESSURE TO BRING WIDESPREAD DRY CONDITIONS AND ABOVE NORMAL TEMPERATURES THROUGH AT LEAST MID NEXT WEEK... ...SLIGHT CHANCE OF ISOLATED SHOWERS/T-STORMS OVER THE SRN SIERRA THROUGH THE WEEKEND... .METEOROLOGICAL CONDITIONS (FRI AM - THU AM)... A strong upper ridge remains situated just offshore of the west coast as troughing drops into the Intermountain West from Canada. Although models have some of this troughing over the region this weekend, 500 mb heights still look on the order of 585 dm plus. In other words, temperatures will remain well above average away from the immediate coast. Anomalies expected roughly +5 to +15 deg F with some areas approaching +20 deg F through at least mid next week as high pressure gradually shifts overhead. 500 mb height ensembles show the ridge flattening some late next week possibly bringing temperatures back closer to normal by the weekend, but still uncertain at this time. Other than the heat, models also continue to show some mid level moisture and instability over the southern Sierra, far srn CA, and srn NV in the afternoons/early evenings today and tomorrow, pulling out of srn CA Sunday afternoon. This could result in a few convective showers/isolated thunderstorms. Freezing levels remain high through the period mainly 15 kft to 16.5 kft region wide. 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. |