National Weather Service United States Department of Commerce

Severe Thunderstorms and Heavy Rainfall in the Ohio Valley and Great Lakes; Winter Weather in the Northern Tier

A slow moving front extending from the Great Lakes region into the Plains will bring snow, wintry mix, and ice accumulation north of the front from the Upper Midwest into New England, and severe weather and heavy rain south of the front. Scattered severe thunderstorms with damaging gusts, severe hail, and heavy rain are expected across parts of the Great Lakes/Midwest through tonight. Read More >

Dramatic Temperature Rise May 15, 2013
A dramatic temperature rise occurred over Central Pennsylvania during the late morning and afternoon hours of May 15, 2013. The temperature graphs below record large temperature changes as a warm front moved across the area. For example, in 4 hours, State College rose from 55 to 81. That's almost 7 degrees per hour.

 

Altoona temp trace

Du Bois temp trace

Clearfield temp trace

Johnstown temp trace

Harrisburg Temp Trace

State College temp trace

max temperature 5/15

COOP Max Temperature for May 15, 2013

Surface Map 1700 UTC

Surface Map 1700 UTC May 15, 2013