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Associated Press

Posted on October 6, 2012 at 4:06 PM

Weather Underground midday recap for Saturday, October 06, 2012.

Below seasonable temperatures continued to spread across the Eastern half of the nation on Saturday. A low pressure system in eastern Canada continued to push a strong cold front eastward and extended from the Northeast, through the Tennessee Valley, and into Arkansas. This system produced widespread scattered showers and thunderstorms, while it also pulled cold air in behind it. This created a chilly Fall day for most of the Eastern U.S. as high temperatures reached into the mid-50s as far south as Tennessee and northern Mississippi. Frost and freeze advisories were issued from the Plains through the Eastern Valleys as overnight and early morning low temperatures dropped into the 20s and 30s. The back side of this trough of low pressure moved off the Central Rockies and into the Central Plains. This brought an end to snow showers over Colorado and Wyoming. Some of these areas saw early morning snowfall totals up to 5 inches. Nebraska saw a messy combination of rain and snow showers throughout the day. South of this frontal boundary remained in the 80s and lower 90s. A few scattered storms popped up across Florida again as another front lingered over Florida and the Gulf of Mexico. Severe storms were not anticipated across Florida.

Meanwhile to the north, the flow over the Great Lakes allowed for a few lake effect snow showers to develop along downwind shores. As high temperatures reached into the lower 40s, most areas of the Great Lakes saw a combination of snow and rain showers. Strong flow from the north continued to pull cool Canadian air into the Upper Midwest, Dakotas, and Northern Rockies. Coolest overnight low temperatures were seen at West Yellowstone, Montana with a low temperature of 6 degrees. Daytime highs barely reached into the 30s for some areas of Montana and Wyoming.

Temperatures in the Lower 48 states Saturday have ranged from a morning low of 6 degrees at West Yellowstone, Mont. to a midday high of 91 degrees at Harlingen, Texas

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