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June 4, 2018 – Dry weather this week with temperatures cooling to around average.

Discussion

Clear skies across interior NorCal early this morning except for a batch of high clouds developing in the lee of the Coast Range and spreading across the northern Sacramento Valley as the mid-level jet moves over NW California ahead of the approaching trough. While the Delta Breeze has been picking up, cooling has yet to materialize over interior NorCal and current temperatures remain on the mild side ranging from the 40s in the mountain valleys to the 60s and 70s across the Central Valley.

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The ridge that brought the hot weather over the weekend will be displaced to our east this week as a trough settles in along the West Coast. Highs today will begin to cool as onshore flow increases and synoptic cooling takes hold. Temperatures will be close to average Tuesday thru Thursday.

Extended discussion (Friday through Monday)

Broad southwesterly aloft will continue over northern CA through the extended period as high pressure dominates across the central US, and a longwave trough persists over the Gulf of Alaska. Expect dry weather to continue across the region through this time frame,with temperatures remaining within a few degrees of normal.