Weather Underground midday recap for Sunday, May 12, 2013.
Much of the wet weather in the Eastern Seaboard tapered off on Sunday as a strong cold front over the region pushed toward the East Coast and offshore through the day. As the cold front progressed, the main trough of low pressure associated with this disturbance became situated over southeastern Canada. This allowed for rain showers to continue in the northern New England states, especially in Maine. Meanwhile, northwest winds flowing on the back of the trough spread across the Lower Great Lakes and kicked up light rain showers downwind of Lakes Ontario and Erie in Upstate New York and Pennsylvania. In addition to showers, northwest winds also ushered a cooler airmass into the Great Lakes This airmass led to unseasonably cool temperatures for much of the Midwest and began to filter into the East Coast states on Sunday.
Meanwhile out West, a cold front moved into the Pacific Northwest and northern California, kicking up rain showers across the Pacific Northwest, with the majority of the precipitation remaining in western Washington. To the south, high pressure prevailed over California and the Desert Southwest with a warming trend and plenty of sunshine.
Temperatures in the Lower 48 states Sunday have ranged from a morning low of 19 degrees at Bemidji, Minn. to a midday high of 100 degrees at Thermal, Calif.