here:" /> here:" /> here:" />
As a high pressure area comes into the East, a northwesterly flow will hold temperatures down today. Tomorrow, with a southwesterly flow, it will become much milder. A couple of disturbances with weak fronts will move from the Great Lakes to the Northeast coast on Friday and Saturday, causing clouds and areas of showers.
Southwest winds should cause another warmup as far north as Pennsylvania and New Jersey on Sunday, but onshore flow could keep cooler air in place farther north. As the next storm and cold front approach slowly from the northwest early next week, the warm air ahead of the front will make progress all the way through New England. Once the front goes by, cooler air will advance once again.
This video has more.
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 here:
The opening page (which you may already have seen) has many disaster related topics:
While the Northeast and Great Lakes regions had fine weather much of the Fourth of July weekend, thunderstorms were very common in other parts of the country. This map shows lightning strokes from 7 a.m. ET yesterday until 6 a.m. ET today:
Over the Ohio Valley, rain is starting nudge northward again, prodded by one of a series of upper air disturbances embedded in the flow. It appears the rain will advance across Pennsylvania overnight, reach the area from New York City to Boston tomorrow... then head out to sea.
Farther north, the area from Chicago to Boston looks most likely to have sunshine and dry weather. Cloud cover will vary during the weekend, and I focus on that aspect of the weekend forecast in this video.
A band of heavy rain and locally violent thunderstorms moved from the New York City area at 4 a.m. to just past Boston (distance: 188 miles) by 9:30 this morning. Note the stunning contrast between where it is pouring (dark red) and where it has dried out.
On the map, showers and thunderstorms were located along and ahead of the gray line that cuts through Pennsylvania and along/ahead of the blue line. Both should be off the East coast by Thursday. Drier air from the Upper Midwest should filter into the Northeast later in the week.
The large storm that drenched the Northeast during the weekend has drifted out to sea and somewhat drier air is coming in to replace it. However, another upper air trough extending from Wisconsin to Louisiana is supporting several pockets of showers and thunderstorms.