Larry Horowitz

ALT A Key Message has been issued for a significant Arctic Outbreak east of the Rockies for the week two period. Below normal temperatures likely for most areas east of the Rockies. Probabilities are highest across the Southeast where some areas exceed 90 percent probabilities of below normal temperatures. A high risk of hazardous below-normal temperatures is indicated across most of the Southeast with moderate to slight risk of hazardous cold temperatures covering most of the remainder of the eastern and central U S. These cold temperatures could lead to dangerous wind chills and may extend far enough to the south to threaten citrus crops in Florida. Frozen precipitation is possible for parts of the southern plains and southeast, with heavy snow extending northward across much of the Eastern U S, potentially leading to significant travel disruptions. Heavy Lake effect snow is likely to enhance totals downwind of the Great Lakes.