While the main risk to lives and property remains from flash and urban flooding early this week, a few storms can bring damaging winds and large hail.
During Monday midday, a couple of storms have had enough favorable conditions to produce a couple of spin-up tornadoes over northern New Jersey and western Connecticut.
The same system was rolling northeastward across portions of Massachusetts, New Hampshire and the southern tip of Maine Monday afternoon.
The storms are occurring as a disturbance rolls northeastward along the boundary between hot and humid air offshore and a corridor of drenching downpours.
A similar setup exists for Tuesday, allowing for a few more brief isolated tornadoes.
People should be alert for rapidly changing weather conditions from New Jersey to central and southern New England Monday afternoon.
There is a possibility of a couple of rain-wrapped tornadoes.
If a tornado warning is issued for your area, move indoors, away from windows, preferable in a basement or small interior room.
A similar setup late last week produced funnel clouds and at least one tornado in central Pennsylvania.
Another visit from the Polar Vortex will deliver unseasonably cool air to the Midwest, preceded by rounds of thunderstorms, including severe weather.
Heat-related dangers will be on the rise over the weekend for much of the Northwest as scorching heat settles in.
As the Northeast continues to clean up from destructive storms early this week, more rounds of severe weather and flash flooding loom for early next week.
Parts of the South will get major relief from heat, humidity and storms next week while other locations will be at greater risk for flash flooding.
Yellowstone National Park's Firehole Lake Drive was closed Thursday, July 10, as portions of the roadway's asphalt melted amid the summer's recent heat wave in the Northwest.
Pinellas Co., FL (1992)
A tornado blew a catamaran into a car, injuring six people.
Eastern North Carolina (1842)
Hurricane struck, "the worst in 80 years"; vessels ashore on beaches; village of Portsmouth washed away.
Basin, WY (1900)
114 degrees -- hottest ever for Wyoming.