Wednesday 9 a.m.
A wide zone of cloudiness that includes patches of showers and some thunderstorms now stretching from Lake Superior all the way to Georgia is moving east. The greatest chance for the heaviest rain from D.C. to New York City will be during the day tomorrow, then tomorrow night in Providence and Boston. Various computer models present widely varying views of the timing. In the Washington area, GFS shows the heaviest rain coming in the afternoon, whereas the NAM-WRF model has most of it in the morning. The European model has rain predicted throughout the day tomorrow. However this turns out, it seems like tomorrow would be a fine time to carry, and at times use, rainwear.
This map shows the projected total rainfall between Wednesday morning and Friday afternoon. The heaviest rain predicted is just over 2 inches not far from Philadelphia. With more than 13 inches, this was the wettest July in the history of record keeping for the city. The rainfall pattern was not uniform, and some northeastern parts of the city got less than half this amount.
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.
During the early morning hours of April 15, there will be a total lunar eclipse visible across North America. This eclipse is the start of a <em>tetrad</em>, a series of four total lunar eclipses over a two-year period. The totality begins at 3:07 a.m. ET, 2:07 a.m. CT, etc.
Severe Weather Awareness Week activities are conducted by National Weather Service offices nationwide at various times during the spring. There is a lot of information for everyone (from children to seniors) available online. You can start <a href="http://www.ready.gov/kids/know-the-facts">here</a>: