Weather Underground Forecast for Sunday, April 07, 2013.
Active weather persists for the West on Sunday, while showers move into the Northwest throughout the day. A strong low pressure system trekking through eastern Canada will continue pushing a cold front across the Northern states. This system will start the day over the Great Lakes, moving southeastward and stretching from the Northeast through the Ohio River Valley by Sunday evening. This will trigger a few rain showers with embedded thunderstorms. This system is not expected to produce severe thunderstorm development.
Behind this system in the West, a stronger system moves over the Rockies and produces more rain and mountain snow showers from Montana through western Colorado. The leading edge of this system will reach into the High Plains, while flow around this system pulls warm air in from the South and moisture in from the Gulf of Mexico. This will allow for showers and thunderstorms to pop up across western Oklahoma and Kansas. Some of these storms will turn severe with main threats of strong winds and large hail. Further west, snowfall levels will continue to drop across the Pacific Northwest and northern California as another disturbance moves onshore and pushes in another cold front. This system will produce up to 6 inches of snow for the Cascades above 4,000 feet. High wind advisories have been issued for both the coastal regions and the mountains as gusts up to 60 mph are likely by mid-day on Sunday.
Temperatures in the Lower 48 states Saturday have ranged from a morning low of -5 degrees at Mt. Washington, N.H. to a high of 85 degrees at Pecos, Texas