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New imagery from dawn Monday: Monsoonal clouds!

 
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windfind



Joined: 18 Mar 1997
Posts: 1808

PostPosted: Sun Jul 31, 2022 9:17 am    Post subject: New imagery from dawn Monday: Monsoonal clouds! Reply with quote

Hi Gang,

New imagery from dawn today of Monsoonal clouds covering the Bay Area and most of the west coast below:

https://blog.weatherflow.com/west-coast-wind-blog-monsoonal-clouds-bring-fire-risk-to-much-of-the-west-coast/

The upper high pressure at ≈18,000 feet that has brought a lingering heat wave to the west coast is also sweeping up moisture from the more tropical waters near Baja.

These clouds will weaken the pressure gradient to the Central Valley, Southern California Deserts and the Columbia Basin taking the edge off the wind at many launch sites in Southern California, San Francisco Bay Area and The Gorge.

Far more importantly, these clouds bring a risk of thunderstorms to the Cascades, Sierra and California coast range for the next few days, especially this afternoon.

Given the winds, during this heat wave and the very dry vegetation this is low confidence, yet potentially high impact forecast for fires for California and the Pacific Northwest.

For the Gorge the Cut-Off upper low to our west at ≈18,000 feet adds to the moisture and instability increasing the risk.

Mike Godsey
Weatherflow



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