Chilly air to spiral into northeastern US in wake of rain
By Alex Sosnowski, AccuWeather senior meteorologist
June 13, 2019, 6:08:33 PM EDT
A pair of storms has caused drenching rain to converge on the northeastern United States while a reinforcing surge of cool weather is poised to follow.
Downpours drenched and slowed part of the morning commute from Washington, D.C., to Philadelphia and New York City. Downpours will fall over central and southeastern New England into Thursday afternoon.
The steadiest and heaviest rain is forecast to lift northeastward across New England during Thursday night.
The rain can fall at a fast enough pace to cause street and highway flooding. For a time, it could feel like a nor'easter unleashing torrential rainfall, but without the strong wind.
Motorists may have to find alternate routes in areas that are prone to taking on water during a downpour. A low cloud ceiling may lead to airline delays in New England into the afternoon.
Meanwhile, a storm from the Midwest will send a batch of showers and thunderstorms eastward into areas missed by the coastal storm.
While most of this rainfall is likely to be unremarkable, downpours can cause sudden, brief drops in the visibility for motorists and in a few cases can lead to street flooding in portions of the Ohio Valley, Appalachians and the lower Great Lakes region.
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Where and when these downpours venture into the metro areas of the major airports, brief flight delays can occur.
Multiple downpours can occur into Thursday evening in Detroit, Cleveland and Pittsburgh.
A few of the thunderstorms that erupt in the pattern can bring isolated incidents of hail and strong wind gusts.
It is possible that the thunderstorms from the Midwest may overlap areas that were hit earlier by steady rain from the coastal storm. In this case, two bouts of heavy rain may occur into Thursday night.
The locally gusty thunderstorm threat extends from Ohio to West Virginia, Virginia, Maryland, New Jersey, western New York state and Pennsylvania into early Thursday night.
Accompanying and following the storm duo is more unseasonably cool air for June.
Many will save on air conditioning costs for a few more days. However, the lower temperatures may keep crowds from community pools and the beaches, especially with a cool wind.
Typical mid-June highs range from near 70 F over the upper Great Lakes and northern New England to near 80 over the lower Ohio Valley and the middle 80s in southeastern Virginia. Nighttime lows average from the upper 40s in the northern tier to the lower 60s along the Ohio River and the Chesapeake Bay region.
In many cases, actual temperatures will range about 5 to 10 degrees lower than that mark on Friday.
By Friday, highs are forecast to generally range from near 60 in the upper Great Lakes to the lower 80s in southeastern Virginia.
Factoring in the gusty wind and cloudy intervals mainly in the northern half of this zone, AccuWeather RealFeel® Temperatures can be several degrees lower than the actual temperature.
During this weekend, the core of the cool air is forecast to pivot northward into Canada and a progressive trend toward warmer conditions will begin in the Northeast.
"It's possible some areas along the mid-Atlantic coast make a run at 90 degrees during the early or middle part of next week," according to AccuWeather Lead Long-Range Meteorologist Paul Pastelok.
During the transition, there is the likelihood of showers and thunderstorms on Father's Day from parts of the Midwest to the Northeast.
Download the free AccuWeather app for more precise details on the forecast for your area. Keep checking back for updates on AccuWeather.com and stay tuned to the AccuWeather Network on DirecTV, Frontier and Verizon Fios.
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