Thursday 11:15 a.m.
Here is today's video. In addition to showing today's cold front, there is an emphasis on the storm threat for the Northeast Sunday night and Monday. Since that storm is not coming for at least three days, there are many things that can change. In a north to south distance of about 125 miles, storm can cause anything from a foot of snow with temperatures in the 20s to an inch of rain with readings in the 40s. There will be dangerous ice in the transition zone.
This map shows the pressure pattern at 10 a.m. A cold front can be identified by the change in curvature of the isobars. This change is easiest to see nearest the northern and southern ends of the front.
On this radar picture, you can see a line of snow squalls. These are possible from eastern Pennsylvania through New England this afternoon. They don't last long, but historically, this is the kind of setup that causes serious multiple vehicle accidents.
This is the chameleon month of March. Always searching for a sense of identity, its days stagger through punches of waning winter, dance with the sunlit caresses of coming spring and hide behind thick clouds through the wind-swept battles between the two.
In the early to middle part of next week, there could be a hint of spring in the region from Illinois to New Jersey. This is a forecast map for next Tuesday morning. The average rain-snow line is midway between the last blue dashed line and the first red dashed line, and.... is that a daring daffodil???
There is uncertainty about how far north a storm from the Gulf states will come on Friday. This morning's NAM is rather bullish on the system. However, it suggests milder weather for the Northeast for a while this weekend before the next cold front arrives.
Many people have requested some real spring weather in the Northeast. Looking out two weeks with the European model, it still looks chilly on this flow aloft forecast for March 19.
This map shows accumulations as of 8 a.m. They have continued to increase since then in Delaware, Maryland and Virginia.
The northward extent of the snow will be determined the progress of snow that was showing up this picture from the radar serving southwest Ohio. The is what it looked like just after 7PM ET.