A cold front will sweep across a large portion of the Northeast on Monday, bringing cooler, less humid air and shaving temperatures by about 15 to 20 degrees Fahrenheit.
Before the cool air arrives, regions could be treated to locally gusty and occasionally severe thunderstorms through Sunday night. The main concerns from these storms are torrential downpours that may trigger brief urban flash flooding, and some storms could produce enough wind to damage trees and cause sporadic power outages.
Coastal areas from New Jersey to southeastern Massachusetts may see periods of rain and drizzle as the front approaches.
Once the front passes, most of New England and parts of New York, Pennsylvania and New Jersey will climb into the 60s to mid-70s for Monday’s highs. Along the mid-Atlantic coast and south of the Pennsylvania line, highs may stay in the 80s, but humidity will drop, making the day feel more comfortable.
In the cooler air, some inland spots will drop into the 30s Tuesday night, though most places will end up in the 50s and 60s.
On Tuesday, drier air will push south along the mid-Atlantic coast, but moisture that had just been driven away may rebound farther west. Expect more cloud cover and at least sporadic showers and thunderstorms from western and central Pennsylvania and western New York extending back through the Upper Midwest. Some storms in the Midwest could be severe with strong winds and flash flooding.
Another cool front is likely to trigger additional shower and thunderstorm activity in the Northeast around midweek, with the chance of another wave of cooler, drier air arriving later in the week.
Meanwhile, Hurricane Erin will be moving northward along the Atlantic, just off the U.S. coast. Beachgoers should anticipate building surf and rising rip currents, and some beaches may restrict swimming. If swimming is allowed, it should be done only under lifeguard supervision.
A far-off jet stream dip is forecast to develop from the Midwest toward the Northeast later in the week, bringing much cooler air from Canada. Depending on wind patterns, smoke from central Canadian wildfires could drift into the Midwest and Northeast once again.
What this means for readers:
– Be prepared for a period of unsettled weather, with heavy rain and the potential for flash flooding in urban areas on the storm’s pulse.
– Plan for cooler, drier air that will feel refreshing after a humid spell, especially Monday into Tuesday.
– If you’re heading to beaches along the coast, monitor surf conditions and obey lifeguards; rip currents can become dangerous as Erin nears.
– Keep an eye on forecasts midweek for additional showers and cooler air, and be aware of possible wildfire smoke influences.
Summary: A potent cool-down is on the way for the Northeast, following a round of storms, with improving air quality and temperatures after Monday. However, expect continued shower chances midweek, beach hazards from Erin offshore, and the possibility of smoke impacts from Canadian wildfires depending on wind patterns. In the longer view, the week should end with cooler, more comfortable conditions across much of the region.
If you’re planning outdoor activities, this outlook favors early-week plans with a fallback for showers later in the week, and it’s a good time to review flood and weather safety preparations. A hopeful note: the region should experience a welcome relief from high humidity and heat as these progressively cooler air masses settle in.