The nation’s weather

Weather Underground Forecast for Wednesday, April 24, 2013.

Unsettled weather returns to the East on Wednesday as the strong cold front of the nation¼’s mid-section continues on and eastward track across the Eastern Valleys. This disturbance is forecast to reach from Upstate New York down the spine of the Central and Southern Appalachians and into the Southeast by Thursday night. Moderate to heavy rain will continue behind the cold front through the morning and afternoon, while chances of showers and thunderstorms develop ahead of this disturbance. This activity will decrease significantly through the day as the cold front nears the Appalachians and available moisture decreases. Severe storms are not anticipated with this disturbance.

Meanwhile, behind this disturbance, a second cold front dropping southeastward from southwestern Canada will move into the Northern Plains and Northern Rockies. Cold temperatures over the region will support light to moderate snow showers near the boundary. This precipitation will move into the Upper Mississippi Valley and will become mixed with areas of rain as the cold front reaches further across the Upper Midwest.

Finally, out West, a weak upper low may bring some light scattered showers to southern California as the low tracks into northern Baja California late Wednesday night/Thursday morning.

Temperatures in the Lower 48 states Tuesday have ranged from a morning low of -9 degrees at Yellowstone, Wyo. to a high of 91 degrees at Thermal, Calif.

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