Tuesday 8 a.m.
While it will be generally mild to warm, a frontal zone will cause changes as it moves southeastward today, stalls tomorrow in Maryland or Virginia, then moves back north on Thursday and Thursday night. Some showers and thunderstorms will affect the area from the Ohio Valley into the Northeast today (west) and tonight (east).
All the computer models show heavy rain during the Thursday to early Friday period in the area surrounding Lake Michigan. Racine, Wis., and Kalamazoo, Mich., have had close to average rainfall for all of April even though the month is barely half over.
The storm that brings rain farther south will cause more snow in the upper Great Lakes. It may get cold enough to allow snow showers in western Michigan by Friday night then in western New York by Saturday morning.
This video deals with Northeast weather for the rest of the week and into the weekend.
This map highlights the pressure pattern and resulting flow from the Ohio Valley eastward this morning.
A deck of clouds about a half-mile overhead spread westward from the Atlantic to much of the I95 corridor from DC to Boston early this morning. These cloud decks can be a forecaster's nightmare in the spring because ...
The map below the video is one of the GFS solutions for where the southeast storm will be early Saturday. The precipitation is predicted to be farther north than suggested by other models.
It is freezing cold in the Northeast this morning, but this map shows that much more mellow mildness has reached the Plains.
Extensive precipitation straddles both sides of the cold front that was moving through central New York and central Pennsylvania as of mid morning. This radar shows the distribution of rain and snow; some temperatures are added.
The cold front approaching the East shows up quite well in this pressure analysis. Several temperatures are plotted to give you a sense for how much the temperature changes behind the cold front. At Chicago, it went from 60 at 4 a.m. to 39 at 5:19, a 21-degree drop in little more than an hour.
Temperatures on Sunday and Monday will range from the 60s in parts of New England to near 80 in Maryland and Virginia. However, a strong cold front will then trigger and perhaps a few thunderstorms as it ushers in air that will be 30-40 degrees colder than it will be ahead of the cold front.