Temperatures are trending up for Worldfest weekend

July 12, 2019 – Dry with slightly above normal temperatures through the weekend. Continued dry through the first half of next week with daytime highs closer to normal. Breezy winds through the delta and over the Sierra crest at times.

Discussion

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Northern California remains under upper level southwest flow between high pressure centered over the four corners area and upper level troughing off the coast. Increasing subsidence under the ridge has squashed down the marine layer to below 500 feet per Fort Ord profiler so only patchy coastal stratus is expected to make it into the delta this morning.

Overall airmass warms a little today so highs should come in a few degrees above normal most areas. Models do bring a little monsoon moisture northward into the western Great Basin but southwest flow aloft should keep any shower activity well east of the CWA.

Only minor changes expected on Saturday with dry warm conditions continuing. May see a slight cooling over the northern CWA with slight thickness drops while the southern CWA sees a little warming.

Models push a weak shortwave trough into the Pacific Northwest on Sunday. This system will have little impact with forecast area remaining dry but most areas should see a few degrees of cooling.

Eastern Pacific trough pushes closer to the coast on Monday bringing a little more cooling but otherwise little change in the overall weather pattern. Most locations should see a little cooling, however, with daytime highs dropping back down close to normal.

Extended Discussion (Tuesday through Friday)

A broad trough is forecast to set up over the Pacific Northwest which will allow for near average temperatures for mid-July. Conditions will remain dry through this period with the delta breeze likely making appearances throughout the week.