Update on Surface Low

November 21, 2009

10:07 P.M.
Hey everybody. I just got back from eating some delicious Indian food so I thought I’d make an update on the forecast as far as winds are concerned for tonight.

Here is the water vapor imagery for . This satellite shot shows the amount of water vapor in the atmosphere. Notice the “dry slot” behind the storm headed towards us. A pronounced dry slot is a telltale sign of an intense low pressure system or one that is still developing. Even when the storm is not visible on the infared satellite, a dry slot can often be observed on the water vapor one.

Here is the infared satellite. In the past few hours, a “bent back occlusion” has developed, which is where the occluded front wraps around the low pressure center. This is also conductive of a vigorous and intensifying low pressure system.
I really can’t give a straight forecast (a coastal radar would really help here!) but I don’t think the Seattle area will be too windy. Still, we have a wind advisory from midnight till 10 A.M. tommorow I think for gusts up to 45 miles per hour. The southwest interior and coast still have high wind warnings. Also, something I forgot to mention earlier was that this storm will bring a very strong westerly surge of wind down the Strait of Juan de Fuca after it passes early Sunday. Expect winds up to 70 miles per hour there as well.


One thought on “Update on Surface Low

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s