Friday East Coast Urban Flooding and Severe Storm Risk

By , Senior Meteorologist
April 12, 2013; 9:05 PM ET
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Heavy rain and locally severe thunderstorms were converging along Atlantic coast Friday.

The storms bring not only the likelihood of travel delays and disruptions to outdoor activities but also a risk to lives and property.

The greatest risk of severe thunderstorms is projected to reach from the Delmarva Peninsula to the coastal areas of the Carolinas.

Some of the storms in this area can bring damaging wind gusts, hail and frequent lightning. While the risk of tornadoes is low, it is possible a couple of the storms produce a short-lived F0 or F1 event.

Meanwhile, converging moisture from the Gulf of Mexico and Atlantic Ocean, ahead of an eastward-advancing cold front, will yield areas of heavy rainfall.

Rain soaked areas from Washington, D.C. to Philadelphia Friday morning and reached the New York area during the midday hours.

Into the evening rush hour, the rain will target Boston and Providence, R.I.

The rain can be heavy enough not only to slow travel on the highways, but could also cause flight delays due to low ceilings. Flash and urban flooding are also a concern.

Snow Visits Northern New England, Neighboring Canada Friday Severe Weather Center
More Snow Denver to Minneapolis Next Week

The front marks the leading edge of much cooler air and the end of the recent spell of warmth for the Southeast and part of the mid-Atlantic.

A wedge of cooler air from New England already brought an end to the warmth farther north in the mid-Atlantic earlier in the week.

Farther north, the air will be cold enough for snow, ice and a wintry mix over upstate New York and northern New England Friday into early Saturday.


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This Day In Weather History

Boston, MA (1703)
"The snow is now 3 or 4 inches deep and a very cold northwest wind"..."much ice". Samuel Sewall, Diary, Mass. Hist. Sec. Coll., 46, 89.

Key West, FL (1846)
(Oct. 10 & 11) Havana-Key West-Atlantic Coast hurricane. In Havana, pressure was 27.06"/916.4 mb. Key West almost destroyed. Fort Taylor, "mass of ruins," 5' of water in city.

New England (1925)
Widespread early snow in New England -- 24" northern VT and NH -- highways blocked on weekend-- football played in deep snow.

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