Locating surface fronts

The image at left shows where front over the northeastern U.S. can be found here. You can download a current maps of fronts and weather systems for all over the U.S. here. In this map, we see the low pressure system responsible for today's cloudy and rainy conditions parked over Lake Erie. A stationary front is analyzed over eastern Pennsylvania. A cold front is analyzed over Northern Ontario and Quebec. Station reports show rain over Southern New England

The fronts shown here are analyzed manually (i.e. by a meteorlogist as opposed to a computer program). They are updated every three hours.