Another high pressure area will build over the Northeast during the weekend, so sunshine with mild afternoons can be expected. However, this forecast map for next Monday evening shows how extensive and wide ranging the next storm may be.
These maps show how the US model handles the disturbance now causing rain in Tennessee. On the 1st map (for tomorrow), it is embedded in a southwesterly flow. However the 2nd map (for late tomorrow night) shows it turning more toward the course that would take it out to sea.
... map shows this morning's surface pressure pattern, including a southerly flow of warm air in the East and a northwesterly flow of cooler air behind a cold front that is drawn in blue. Showers accompany and precede the cold front marking the boundary between the two air masses.
Rainfall between today and Friday night will be highly variable between the Midwest and East Coast. Parts of the Ohio Valley, where it has been wet recently, will get more heavy rain; places along the East Coast will generally get less. From New York City to D.C., this weekend may be the nicest so far this year!
This morning there was a sharp boundary separating chilly air to the north from warm air the the south. West of the Appalachians, the boundary will not move much today. East of the mountains, the boundary will keep moving south until it reaches southern Virginia or North Carolina tomorrow.
This visible satellite picture shows the setting as of 8:15 AM ET Monday. There are no major storms in the Northeast and there are some areas with sunshine. A chilly and wet period will follow from the Appalachians to the Atlantic.
This forecast map for April 8th suggests a cool and moist easterly flow could develop from Southern New England to Virginia next week. Once a regime like that is established, several days of dull, dreary, damp, dim and drab weather can follow.
On the atmospheric pressure map, we see a south to southwesterly flow from west of Chicago to east of New York City. It is bringing true springtime air into the Northeast. Farther west, there is a cold front. Ahead of the front, there are clusters and lines of showers and thunderstorms.