Thursday 10 a.m.
An area of rain and thunderstorms that covered West Virginia and the western parts of New York and Pennsylvania is spreading east and northeast today. Moisture from Andrea will come next, and the I95 corridor could have very heavy rain as the storm approaches from the southwest tomorrow and tomorrow night. Street and highway flooding could cause a real slowdown for travelers and commuters, but it appears the storm will move quickly enough that there is little chance for flooding on the major rivers.
My Northeast video from Thursday morning:
Andrea, the season's first tropical storm, will move northeast along the Eastern Seaboard causing heavy rain and gale-force gusts. The rain can fall very heavily, causing sudden street flooding and very poor visibility. Quite a few models are in use, and this map shows there is widespread agreement on where the center of this storm is going.
In yesterday's report I made an analogy about predicting snow amounts using our 16 year old American Eskimo dog Sam as an example. I told Sam about it before taking this picture, but he just looked at me.
This map shows the pressure pattern around the big storm that some people in Boston and Providence are comparing with the Blizzard of '78.
In the worst-hit areas, plan for travel bans (for all non-emergency activities) because of impassable roads and extremely poor visibility. This map shows our projection for snow accumulations by early Wednesday. In many areas the heaviest snow should fall overnight and tomorrow morning.
In the worst-hit areas, plan for travel bans (for all non-emergency activities) because of impassable roads and extremely poor visibility. If you get stranded, rescue crews may not be able to reach you. Storms like this sometimes generate thunderstorms within the heaviest snow bands. The map shows predicted snow accumulations by early Wednesday.
It appears likely that many normal activities can go on through the day Monday, as long as the typical cautions for light to moderate snowfalls are observed. Tuesday will be an <strong>entirely different story</strong>. This map shows the GFS- predicted snowfall through 7 P.M. ET Monday:
The second storm we have been talking about will affect the Middle Atlantic region late Sunday and Sunday night. This GFS forecast map is for 7PM ET Sunday and shows precipitation amounts for the 6 hours up to that time.