US Day 3-7 Hazards Outlook NWS Weather Prediction Center College Park MD 330 PM EST Mon Feb 14 2022 Valid Thursday February 17 2022 - Monday February 21 2022 Hazards: - Heavy precipitation across portions of the Middle Mississippi Valley, the Great Lakes, and the Ohio Valley, Thu, Feb 17. - Heavy rain across portions of the Mid-Atlantic, the Lower Mississippi Valley, the Central/Southern Appalachians, the Tennessee Valley, the Northeast, the Southeast, the Great Lakes, and the Ohio Valley, Thu, Feb 17. - Heavy snow across portions of the Central Plains, the Upper/Middle Mississippi Valley, the Great Lakes, and the Ohio Valley, Thu, Feb 17. - Severe weather across portions of the Lower Mississippi Valley, the Tennessee Valley, the Middle Mississippi Valley, the Southeast, the Southern Plains, and the Ohio Valley, Thu, Feb 17. - High winds across portions of the Central/Southern Plains, the Great Lakes, and the Upper/Middle Mississippi Valley, Thu, Feb 17. - High winds across portions of the Southeast, the Mid-Atlantic, and the Northeast, Thu-Fri, Feb 17-Feb 18. - Much below normal temperatures across portions of the Mississippi Valley, the Great Lakes, the Central/Southern Rockies, and the Plains, Thu-Fri, Feb 17-Feb 18. - Heavy precipitation across portions of the Alaska Panhandle, Thu-Fri, Feb 17-Feb 18. Detailed Summary: A front extending from the Lower Great Lakes to the Western Gulf Coast will have moisture from the Western Gulf of Mexico pooling along the boundary producing several hazards on Thursday. The first hazard is an area of Severe Weather over parts of the Lower Mississippi/Tennessee Valleys and the Southeast, as the front destabilizes the atmosphere producing severe thunderstorms. The second hazard is an area of Heavy Rain from parts of the Central Gulf Coast/Southeast to the Ohio Valley, Northeast, and Mid-Atlantic. The third hazard is an area of Heavy Snow extending from Michigan s Lower Peninsula to central Missouri and eastern Kansas. The fourth hazard is between the Heavy Snow and Heavy Rain, and there will be a transition region of rain/sleet/snow displayed as an area of Heavy Precipitation. Furthermore, a strong pressure gradient is associated with the storm producing an area of High Winds from parts of the Southern High Plains to the Upper Great Lakes, also on Thursday. A second area of High Winds will develop along the East Coast from parts of Northern New England southward to the Carolinas, primarily along the coastline and inland over a few areas to offshore on Thursday and Friday. The front will move off the East Coast by Friday evening, with the rain and snow ending over the area by Friday afternoon. Behind the front cold high pressure will build in over the Upper Midwest into the Southern Plans and Southern Rockies on Thursday and Friday. The cold air associated with the high will produce temperatures from the low twenties below zero to the mid-teens below zero over the Upper Midwest to the upper to low twenties over parts of the Southern Rockies and Southern High Plains on Thursday morning. For Friday morning, the low temperature will be in the low-teens below zero to single digits below zero to the low to mid-twenties over the Southern Rockies and Southern High Plains. Therefore, with the low temperatures over the region, an area of Much Below Normal Temperatures is depicted on the Hazards Chart on Thursday and Friday. Meanwhile, low pressure over Western Canada will move eastward just north of the U. S./Canadian border, passing the Great Lakes on Saturday and moving into Canadian Maritimes by Sunday. The system will produce strong wind over the Great Lakes on Saturday but will be below the criteria for hazards. Also, the storm will produce light snow over parts of the Upper Midwest, late Friday into the Northeast on Sunday. Moreover, a front will move onshore over the Pacific Northwest overnight Saturday moving to the Central Plains by Monday. The storm will produce light rain along the Northwest Coast and snow at higher elevations on Sunday and snow over the Northern/Central Rockies on Monday. Also, on Monday, a weak warm front along the Gulf Coast and moisture beginning to move off the Gulf of Mexico will aid in producing light rain over parts of the Central Gulf Coast. . . .Alaska. . . Low pressure will move along the Aleutians on Thursday, moving eastward into the Mainland on Friday and into the Panhandle/Western Canada by Saturday. The system will produce rain and snow over parts of the Aleutians and Southwestern Mainland on Thursday, with rain and snow over the Southern-Central Mainland on Friday. However, a weak warm front near the Alaska Panhandle on Thursday will dissipate as the Aleutian low move in on Friday. The systems will stream moisture into the Panhandle, producing an area of Heavy Precipitation over the Panhandle on Thursday and Friday. The rain and snow will lessen on Saturday as another area of low pressure approaches the Aleutians. The new low will produce rain and snow over the Aleutians on Sunday and over the Southwestern Mainland on Monday. More rain and snow will move into the Alaska Panhandle overnight Sunday and Monday. Ziegenfelder