September 18, 2017 Summary: The newest trough of low pressure is now moving into the Pacific Northwest with showers over Washington and Oregon and increasing clouds over far northern California. Today will be a bit cooler as a relatively strong on shore flow is in place. The marine layer is roughly 3,000 feet deep and…
Author: Trudy Hibler
September 16, 2017
September 16, 2017 Summary: The latest trough of low pressure is now moving through the Pacific Northwest. High clouds have spread as far south as Sacramento and a few high clouds may be visible here later this afternoon. Temperatures this afternoon will struggle towards seasonal values as temporarily the marine layer is too shallow to…
September 15, 2017
September 15, 2017 Summary: Can you believe it? Temperatures plummeted yesterday into the mid 80s, bringing a touch of fall to the air. Many locations are down into the mid 50s this morning with a few low 50s in the low spots. All this is courtesy of a trough of low pressure which is now…
September 14, 2017
September 14, 2017 Summary: The center of circulation of an upper low we’ve been discussing for the past week has finally moved inland and is centered near the southern Nevada/California border. The only thing currently showing up on radar are showers over southern Nevada and parts of Utah. Today will be the coolest day in…
September 13 2017
September 13, 2017 Summary: Suddenly the marine layer along the coast has deepened to nearly 3,000 feet. The sea breeze is surging through the Delta and through other gaps and passes along the Coast Range. In fact, winds at Pacheco Pass are currently gusting to 35 MPH. this will usher in a long awaited cooling…
September 12, 2017
September 12, 2017 Summary: An upper low jogged a bit further north overnight and is centered roughly 300 miles to the west/southwest of Monterey. The active portion of this storm continues to be over its far eastern and northern flanks. That has put showers over northern California and left central and southern California largely free…
September 11, 2017/pm
September 11, 2017/pm Summary: Scattered light showers as of the time of this writing had broken out over western Fresno and Madera Counties. This activity was moving northwestward at a rapid pace. Upper level low pressure is near 400 miles to the west/southwest of San Luis Obispo and is forecast to drift further north through…
September 11, 2017
September 11, 2017 Summary: The center of a cut off low is located about 500 miles to the west/southwest of Santa Barbara. Monsoon moisture is wrapping around the low, especially over its eastern and northern flanks. Light showers did occur in western Fresno County during the early morning hours and isolated thunderstorms are occurring over…
September 10, 2017/pm
September 10, 2017/pm Summary: A cut off low remains off the southern California coast this afternoon. The far eastern edge of the low is moving some cloud cover over mainly the southern and western portions of the valley. Doppler radar continues to pick up scattered showers, generally just west of the Channel Islands and moving…
September 10, 2017/am
September 10, 2017 Summary: Our cut off low has moved southward and is now parked about 400 miles to the west/southwest of Santa Barbara. Along its eastern flank, showers are beginning to show up on radar over the Channel Islands up to the coast of Santa Barbara County. The flow aloft above central California is…