|Public Severe Weather Outlook (PWO)|
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|Please note this briefing may be out of date after 1704 UTC on 11/17/2013 and there will be no subsequent updates during the day.|
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ZCZC SPCPWOSPC ALL WOUS40 KWNS 170849 ILZ000-INZ000-KYZ000-MIZ000-OHZ000-WIZ000-171800- PUBLIC SEVERE WEATHER OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0249 AM CST SUN NOV 17 2013 ...SEVERE THUNDERSTORMS EXPECTED OVER PARTS OF THE MID-MISSISSIPPI AND OHIO VALLEYS INTO MICHIGAN TODAY THROUGH EARLY TONIGHT... The NWS Storm Prediction Center in Norman, Oklahoma is forecasting the development of a few strong, long-track tornadoes over parts of the Mid-Mississippi and Ohio Valleys into Michigan today through early tonight. The areas most likely to experience this activity include: Illinois Indiana Northern and Western Kentucky Lower Michigan Ohio Southeast Wisconsin Surrounding this greatest risk region, severe thunderstorms will also be possible from parts of Wisconsin, Iowa, Missouri, Arkansas, Mississippi, Alabama, and Tennessee northeastward across much of the Appalachians to the lower Great Lakes. A potent jet stream disturbance with wind speeds in excess of 120 knots will sweep east across the central Plains today and across the Ohio Valley and northern half of the Appalachians tonight. As this occurs, a surface low now over the mid-Mississippi Valley will rapidly intensify and accelerate northeastward, reaching northern Michigan early tonight and western Quebec Monday morning. East of the low, increasingly warm and humid air at the surface will spread north across the Tennessee and Ohio Valleys, contributing to very unstable conditions over a large part of the east central United States. Coupled with daytime heating and ascent provided the jet stream impulse, the environment will become very favorable for severe thunderstorms --- especially along and ahead of fast-moving cold front trailing southward from the low into the mid-Mississippi and Ohio Valleys. Given the degree of thermodynamic instability, and the strength and character of the winds through the depth of the atmosphere, many of the storms will become supercells. Some of these will be capable of producing strong tornadoes --- in addition to large hail and swaths of damaging surface winds. The storms are expected to consolidate into one or two extensive lines later today into tonight --- extending the threat for damaging winds and isolated tornadoes eastward into the Appalachians by early Monday. State and local emergency managers are monitoring this potentially very dangerous situation. Those in the threatened area are urged to review severe weather safety rules and to listen to radio, television, and NOAA Weather Radio for possible watches, warnings, and statements later today. ..Corfidi.. 11/17/2013 $$
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