Hydrometeorological Discussion National Weather Service / California-Nevada RFC / Sacramento CA 610 AM PDT Thu Jun 18 2026 ...PRECIP CHANCES INCREASE FOR NORTHERN AREAS FRI-SAT... ...WARMING AND DRIER BY NEXT WEEK... .METEOROLOGICAL CONDITIONS (THU AM - WED AM)... High pressure over the eastern Pacific and west coast will begin to shift inland today...expected to reach the Rocky Mountains by Friday and farther downstream over the Plains states by the weekend. This will be replaced by general troffing along the west coast for Friday through the weekend...before strong high pressure builds near the 4- Corners region during the first half of next week. In terms of precip...very scattered showers and t-storms are once again possible over the crest of the Sierra today during the afternoon and early evening hours. Then into tomorrow and Saturday as a weak disturbance moves through the general troffing along the west coast...precip chances will increase over the Klamath River basin down across northeast CA and much of the Sierra...as well as farther inland over northern NV. Overall...precip amounts will remain near or less than 0.25-inch...except where under stronger convective cells where totals may be higher. By next week...as the high pressure builds over the 4-Corners region...dry conditions are anticipated. Freezing levels are currently running from 15000- to 17000-feet across the region...dip a bit across northern areas Friday through the weekend (about 13000-feet or so)...and then bounce back to a similar range as today by the first half of next week. 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. |