First, lets consider the most important issue first: Punxsutawney Phil saw his shadow today, which means 6 more weeks of winter. This result is consistent with seasonal climate models, such as the NOAA Climate Forecast System Model, which suggest that there will be some persistence to dry/warm/west with cold east pattern we have seen. The idea of his seeing his shadow implying cool temperatures makes some sense, since that would imply high pressure and cold air is over the East Coast.
Seattle is on pins and needles about the Seahawks game, and for good reason. The forecast situation is consistent with what was predicted a few days ago.
Today is relatively mild over East Rutherford, NJ with highs getting up into the higher 40s. A frontal zone is slowly approaching the Super Bowl site (see image), where it is now partly cloudy.
As shown by the NWS forecast, which I think is quite reasonable, the game will start (6:30 PM) in the lower to mid-forties (under clouds), with cooling to around 37-38F by the end (top panel has temp-red, wind chill -green, dew point-blue, middle panel has wind, lower panel has prob of precip-brown). Very much Seattle-like conditions that will make the Seahawks feel comfortable. Winds from the north at 5-10 mph.
The big question is precipitation....this is going to be close. The latest NOAA Rapid Refresh Model runs (they run the model every hour using all available regional observations) suggest that light precipitation...probably rain..will get there at the very end of the game. The RAP simulated radar image for 7 PM shows dry conditions over MetLife stadium
Here the predicted radar image for midnight--some light showers have reached the venue.
The threat of rain will surely unnerve the Broncos, considering the arid environment for which they are accustomed.
Finally, the Northwest is about to enter a cold period that will be quite dry in Washington. The surface chart of Tuesday morning says it all (purples are very cold temps). Over Washington expect offshore (easterly) flow, which ensures sun and little precipitation. Our high temperatures will ONLY get into the mid-30s!
A meteorological irony is that Washington's cold and sun gives Oregon and California a chance for precipitation as the frontal zone moves southward. Take a look at the precipitation for the next 72 hr and the 72h after that. First, the precipitation through Wednesday at 4 AM. Oregon gets wet (snow in the mountains there!) and the northern Rockies do very well. Even CA getting something...but not much.
The next 72 h is dry for Washington and Oregon, but thankfully California get more significant precipitation. Those poor devils need every drop
And there is much I haven't talked about....like the strong NE winds that will hit Bellingham and NW Washington! The wind chills there will be serious. And don't forget the potential western Washington snowstorm on Saturday!