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164 FXUS66 KSTO 191134 AFDSTO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SACRAMENTO CA 434 AM PDT Fri Sep 19 2014 .Synopsis... Lingering Sierra showers/t-storms are possible through the weekend, otherwise, dry & warmer temperatures into early next week. Cooler and wetter weather arrives middle of next week into next weekend. && .Discussion... Ridging over the west coast will bring warmer temperatures through the weekend with daytime highs near to several degrees above normal. Today and Saturday will be the warmest days in the seven day forecast as valley highs range upper 80s to upper 90s...mountain highs ranging in the 70s and 80s. A closed low will linger to the south of our region bringing the possibility of showers/thunderstorms over the Sierra today into Sunday. By Monday, that closed low will exit eastward as a stronger offshore low approaches the west coast. Dry weather with gradual cooling is forecast for Monday and Tuesday as daytime highs are near to slightly above normal. Smoke from the King Fire will continue to impact the region today and tomorrow over portions of the Sierra including the adjacent foothills. Smoke could sink into the valley (mostly along the extreme eastern edge of the Southern Sacramento and San Joaquin valleys) after today when the winds shift. JBB .Extended Discussion (Tuesday through Friday) Models in good agreement that a stronger trough will impact the region in the extended forecast. Tuesday should remain dry but temperatures will be near to slightly below normal as the trough approaches. By Wednesday, temperatures will drop well below normal, especially over higher terrain. In addition, the chance for showers will start impacting the NorCal coastline by early Wednesday. Showers should spread over the Coastal range into the Sacramento valley late Wednesday morning. The chance of showers will continue to spread eastward and southward encompassing the majority of our CWA Thursday and Friday as cooler temperatures persist. JBB && .Aviation... VFR conditions the next 24 hours all TAF sites. Isolated Sierra crest thunderstorms south of Tahoe. Winds mainly north to east generally below 15 knots. && .STO Watches/Warnings/Advisories... None. && $$