Note: I will be out of the office after today until Jan. 2, 2014, so let me take this opportunity to wish you a Happy New Year. HAPPY NEW YEAR
This video explains how the weather will change during the next week or so... and why those changes area expected.
Winds aloft will become southwesterly over the Eastern states this weekend, causing mild moist air to spread from the Gulf states right up along the East Coast. This means rain on Sunday along the I-95 corridor from Virginia to southern New England. The storm responsible for organizing the rain will then leave, and a major change to colder weather will reach the Northeast Tuesday and Wednesday. This map shows the forecast of the upper air steering currents next Tuesday. If you trace the origin of air that winds up in New York state, you can see it starts out in northern Canada.
It's going to be hot hazy and humid in the much of the Northeast today through Thursday. The recalescent, sudorific, canicular, pyrogenic frying heat gains our attention.
A line of persistent showers and thunderstorms stretched from Long Island Sound to Cape Cod. Some areas in this zone had more than 3 inches of rain this morning, and there can be highway flooding in localized heavy showers this afternoon and evening. This radar shows the rain zone just after 10 a.m. ET.
This map shows the predicted upper-air flow for tomorrow night. Our timing estimates suggest showers and some thunderstorms could affect the I-95 corridor from Portland and Boston to New York City (and perhaps Philadelphia) on Sunday.
For the start of this "Olympics of the Forest," the weather looks good, as forest we can tell. From DC to NYC, it looks sunny for at least the next two, tree days.
As moisture from former hurricane Delores moved northward, the dynamic changed, and thunderstorms broke out. This map shows the more than 300,000 strokes that occurred between early yesterday and early today.
The recent volatility of the weather in many areas of the Central and Eastern states is demonstrated by the widespread thunderstorm activity of the last couple of days. The lightning map shows hundreds of thousands of lightning strokes between 7 a.m. ET yesterday and about the same time today: