Friday, November 11, 2011

Tonight's Forecast

Highlights in the forecast:

•Rain entering Texas
•30s from Wisconsin east into Northeast region
•40s across Plains as warm front moves through
•Lake effect precipitation in Northeast region
•Dry across Southeast as ridge in place
•Snowy in the mountains in the Northwest
•California coast wet, higher waves as low pressure system spins offshore
•Breezy in Texas

ECMWF Indicates Cooler Air to Enter North US as NAO Dips Negative

In a move we've been predicting for days, the NAO index should move negative, allowing some colder weather to enter the North US region. The ECMWF has latched onto this solution, as seen below in the 850 mb picture 5 days out.
The NAO should be enough in negative territory that this cold air moving into the North Plains should occur. The big obstacle, however, is the very strongly negative PNA pattern that should sustain itself over at least the next week. This will likely provide a bit of trouble for whatever colder air may come into the US. When this PNA is strongly negative, it can make for a warmer solution across portions of the east US.

Major Updates to Pages

We have introduced major updates to the Weather Models page and Winter Weather Wall page.
Click on the links above to see the updates.