Heat returns for the remainder of the workweek

August 13, 2019 – Dry weather will prevail through the week. A warming trend builds through mid-week with valley highs reaching triple digits.

Cooler weather returns for the end of the week.

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Discussion

Other than a few high clouds drifting across the far northern portion of the state, skies are clear early this morning. The marine layer remains very shallow and pressure gradients are weak.

Current temperatures are mild and range from the mid 40s to lower 50s in the colder mountain valleys, to the mid 60s to mid 70s across most of the Central Valley.

Strengthening high pressure will result in another round of heat across the region through the remainder of the week.

Highs today are expected to be around the century mark throughout the valley, then gradually warm into Thursday when valley highs are forecast to peak in the 105 to 110 range.

Models are trending weaker with the late-week trough, but it is expected to be sufficiently strong to induce stronger onshore flow beginning Friday resulting in moderating temperatures.

Extended Discussion (Saturday through Tuesday)

A cooling trend is anticipated over the weekend as an upper level trough digs into the PacNW. However, latest guidance has trended slightly warmer. Look for temperatures this weekend to be in the upper 80s to low 90s across the Valley, and upper 60s and 80s over the mountains.

Ensembles still keep the forecast area dry as this system moves mainly north of the region, so have kept the forecast dry.

By early next week, daytime temperatures will gradually warm up as heights increase, and are expected to be near or within a few degrees of normal.