Lovely weather…. for late fall!

Here we go, with showers, heavy rains, thunderstorms; temperatures in the 40s and 50s and blasting icy winds.

I guess we missed out on a real period of spring-like weather, so just like in Monty Python and the Holy Grail, perhaps we’ll give summer a complete miss as well as spring.

We have a strong upper air low pressure system over us. When we get systems like this, the low pressure aloft gives us colder temperatures aloft which makes the air below unstable, rising rapidly to produce heavy showers.

Here’s the upper air chart for the jet stream at 18,000 feet. The white lines making a circle just to our east show the upper air low pressure system. (NYC is in out on the right side of the map – look for the outline of the coastline and the state boundaries in black – hard to see sometimes).

gfs_500_init

This map shows the white lines of the winds about 1 mile up and the colors show temperature, which is related to our temperatures here at the surface. Notice the white lines dragging down the blue color into the eastern United States, bringing the colder temperatures we are having.

gfs_850_init

Warmer air arrives early next week, making for a nice Memorial Day and warmest later in the week. See the orange color over us on Saturday morning’s map – 16 to 18 degrees C a mile up, which can mean 32 to 36 degrees C here on the ground – in the upper 80s/lower 90s F.

gfs_850_7d

Advertisements

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 )

Twitter picture

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

Facebook photo

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

Google+ photo

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

Connecting to %s