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windfind
Joined: 18 Mar 1997 Posts: 1905
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Posted: Tue Jul 05, 2022 1:40 pm Post subject: Waves in clouds show today's issues for 3rd & PI |
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Hi Gang,
Today's Newest image is at bottom of this thread.
Normally as the winter season passes the average position of the North Pacific High moves north into Southern California and then Central California coastal waters and they see a period of frequent strong NW ocean wind. Then the NPH moves closer to the San Francisco Bay Area and NW ocean winds ramp up there and weaken in Southern California and Baja waters. And finally, in summer, the NPH west of the Pacific Northwest lingers helping to provide the powerful winds of the Columbia River Gorge while June Gloom sets in for San Francisco. But this summer has been surprisingly different.
https://blog.weatherflow.com/west-coast-wind-blog-weird-north-pacific-high-impacts-all-of-the-west-coast/
Any one of the days this summer is just a low probability anomaly but having so many in a few months is a serious anomaly. To use a poker example. Getting dealt a royal flush is just a low probability event. But getting dealt many royal flushes in an evening would make you begin to think that something is messing with the deck of cards.
It is like the great shot below that I got in La Ventana. There are almost never winter rainbows in La Ventana and the kiter has the perfect colored outfit and smiling and looking at the camera? That is why almost everyone that sees this photo thinks it is photoshopped. But it is a real photo. BUT, if I kept having such low probability photos all the time people would get suspicious.
Mike Godsey
Weatherflow.com
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Last edited by windfind on Sat Jul 09, 2022 10:10 am; edited 2 times in total |
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mac
Joined: 07 Mar 1999 Posts: 17772 Location: Berkeley, California
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Posted: Thu Jul 07, 2022 10:26 pm Post subject: |
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It’s been just weird. Today Berkeley Reef went from 18 to 26, with gusts over 35–after 3. Yesterday, the wind dropped to 12–at the top of Berkeley Pier! I slogged for 20 minutes before I could get going again. More days that I have just stopped sailing because it is too windy, or gusty, than any year I can remember—and this is my 43rd year sailing. Some of it can be explained by north south fights—two systems interacting over the bay. But it ends up making it very weird sailing.
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windfind
Joined: 18 Mar 1997 Posts: 1905
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Posted: Sat Jul 09, 2022 10:07 am Post subject: Satellite and cam imagery from dawn today July 9 |
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Hi Gang,
Here is satellite and cam imagery from dawn today July 9. The imagery shows the developing battle between WNW and WSW flow that will play out near 3rd. Ave. and near Pt. Isabel and Berkeley today.
When the marine layer is the perfect depth like today the NW ocean winds hitting the Pt. Reyes Peninsula and the coast range generate waves in the marine layer clouds that allow us to easily visualize the curving of the marine layer clouds as they follow the different routes to the building low pressure in the Central Valley.
Each wave cloud is an area where the wind just aloft is ascending. Each clear area between wave clouds is where air is descending. As these waves come over warming land the clouds may disappear but the motion of the winds persists. This means as it descends it impacts the surface wind. When it rises it does not. You experience this as gusts then lulls. BUT if the direction of the winds just aloft is different than the surface wind you also experience it as a winds shift + gust and lull. The "battleline" is where this activity is strongest at any given time near 3rd. Ave. and Pt. Isabel hence the issues.
This blog has details about this battleline:
https://blog.weatherflow.com/west-coast-wind-blog-developing-battle-between-wnw-and-wsw-flow-that-will-play-out-near-3rd-ave-and-near-pt-isabel-and-berkeley-today/
Mike Godsey
Weatherflow
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