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Severe Thunderstorm Advisory #2104

USA Weather — Severe Weather Division

Issued
May 15 at 6:42 PM CDT
Expires
May 16 at 2:00 AM CDT
Forecasters
Wyatt Huber
States Included
Iowa and Wisconsin
Counties Included
Clayton, Dubuque, Adams, Brown, Calumet, Clark, Columbia, Crawford, Dane, Dodge, Eau Claire, Fond du Lac, Grant, Green, Green Lake, Iowa, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Manitowoc, Marathon, Marquette, Milwaukee, Monroe, Oconto, Outagamie, Ozaukee, Portage, Racine, Richland, Rock, Sauk, Shawano, Sheboygan, Vernon, Walworth, Washington, Waukesha, Waupaca, Waushara, Winnebago, and Wood
Cities Included
North Buena Vista, Asbury, Balltown, Durango, Holy Cross, Rickardsville, Sageville, Sherrill, Adams, Arkdale, Big Spring, Brooks, Dellwood, Friendship, Grand Marsh, Monroe Center, Plainville, White Creek, Allouez, Anston, Ashwaubenon, Bellevue, Benderville, De Pere, Denmark, Dyckesville, Green Bay, Greenleaf, Hobart, Howard, Langes Corners, Little Rapids, New Franken, Oneida, Pulaski, Suamico, Wayside, Wrightstown, Brillion, Chilton, Dundas, Forest Junction, Harrison, Hilbert, New Holstein, Potter, Sherwood, Stockbridge, Chili, Christie, Granton, Greenwood, Humbird, Loyal, Neillsville, Willard, Arlington, Cambria, Columbus, Doylestown, Fall River, Friesland, Lake Wisconsin, Lodi, Pardeeville, Portage, Poynette, Randolph, Rio, Wisconsin Dells, Wyocena, Bell Center, Fairview, Gays Mills, Mount Sterling, Mount Zion, Seneca, Soldiers Grove, Steuben, Wauzeka, Belleville, Black Earth, Blue Mounds, Cambridge, Cottage Grove, Cross Plains, Daleyville, Dane, De Forest, Deerfield, Fitchburg, London, Madison, Maple Bluff, Marshall, Martinsville, Mazomanie, McFarland, Middleton, Monona, Morrisonville, Mount Horeb, Oregon, Rockdale, Shorewood Hills, Stoughton, Sun Prairie, Verona, Waunakee, Windsor, Alderley, Ashippun, Astico, Beaver Dam, Brownsville, Burnett, Clyman, Fox Lake, Horicon, Hustisford, Iron Ridge, Juneau, Kekoskee, Knowles, Lebanon, Lomira, Lowell, Mayville, Neosho, Reeseville, Richwood, Rubicon, Theresa, Watertown, Waupun, Woodland, Fairchild, Brandon, Campbellsport, Dotyville, Eden, Eldorado, Fairwater, Fond du Lac, Johnsburg, Malone, Mount Calvary, North Fond du Lac, Oakfield, Pipe, Ripon, Rosendale, Saint Cloud, Saint Peter, Taycheedah, Van Dyne, Waucousta, Beetown, Bloomington, Blue River, Boscobel, Cassville, Cuba City, Dickeyville, Fennimore, Glen Haven, Hazel Green, Kieler, Lancaster, Livingston, Montfort, Mount Hope, Muscoda, Patch Grove, Platteville, Potosi, Sandy Hook, Sinsinawa, Stitzer, Tennyson, Werley, Woodman, Albany, Brodhead, Brooklyn, Browntown, Dayton, Monroe, Monticello, New Glarus, Postville, Berlin, Dalton, Green Lake, Kingston, Markesan, Marquette, Princeton, Arena, Avoca, Barneveld, Cobb, Dodgeville, Edmund, Highland, Hollandale, Linden, Mineral Point, Rewey, Ridgeway, Alma Center, Black River Falls, Hatfield, Merrillan, Millston, Vaudreuil, Fort Atkinson, Hebron, Helenville, Ixonia, Jefferson, Johnson Creek, Lake Koshkonong, Lake Mills, Lake Ripley, Palmyra, Rome, Sullivan, Waterloo, Camp Douglas, Elroy, Hustler, Lyndon Station, Mather, Mauston, Necedah, New Lisbon, Union Center, Wonewoc, Bassett, Benet Lake, Bristol, Camp Lake, Kenosha, Lake Shangrila, New Munster, Paddock Lake, Pleasant Prairie, Powers Lake, Salem, Salem Lakes, Silver Lake, Somers, Trevor, Twin Lakes, Wilmot, Woodworth, Luxemburg, Pilsen, Tonet, Bangor, Rockland, Argyle, Belmont, Benton, Blanchardville, Calamine, Darlington, Gratiot, Shullsburg, South Wayne, Wiota, Woodford, Cleveland, Collins, Francis Creek, Kellnersville, Kiel, Manitowoc, Maribel, Menchalville, Newton, Reedsville, Saint Nazianz, Valders, Whitelaw, Galloway, Knowlton, Rozellville, Spencer, Briggsville, Endeavor, Germania, Montello, Neshkoro, Oxford, Packwaukee, Westfield, Bayside, Brown Deer, Cudahy, Fox Point, Franklin, Glendale, Greendale, Greenfield, Hales Corners, Milwaukee, Oak Creek, River Hills, Saint Francis, Shorewood, South Milwaukee, Wauwatosa, West Allis, West Milwaukee, Whitefish Bay, Cashton, Cataract, Kendall, Melvina, Norwalk, Oakdale, Sparta, Tomah, Tunnel City, Warrens, Wilton, Wyeville, Little Suamico, Sobieski, Appleton, Bear Creek, Black Creek, Combined Locks, Dale, Freedom, Greenville, Hortonville, Kaukauna, Kimberly, Little Chute, Mackville, Medina, Nichols, Seymour, Shiocton, Sugar Bush, Belgium, Cedarburg, Fredonia, Grafton, Mequon, Port Washington, Saukville, Thiensville, Waubeka, Almond, Amherst, Amherst Junction, Arnott, Bancroft, Custer, Junction City, Kellner, Nelsonville, Park Ridge, Peru, Plover, Polonia, Rosholt, Stevens Point, Whiting, Bohners Lake, Browns Lake, Burlington, Caledonia, Eagle Lake, Elmwood Park, Franksville, Kansasville, Mount Pleasant, North Bay, North Cape, Racine, Rochester, Sturtevant, Tichigan, Union Grove, Waterford, Wind Lake, Wind Point, Bloom City, Boaz, Cazenovia, Gotham, Lone Rock, Loyd, Richland Center, Sextonville, Yuba, Afton, Avalon, Beloit, Clinton, Cooksville, Edgerton, Evansville, Footville, Hanover, Janesville, Johnstown Center, Leyden, Milton, Orfordville, Baraboo, Black Hawk, Bluffview, Hillpoint, Ironton, La Valle, Lake Delton, Leland, Lime Ridge, Loganville, Merrimac, North Freedom, Plain, Prairie du Sac, Reedsburg, Rock Springs, Sauk City, Spring Green, Valton, West Baraboo, Angelica, Bonduel, Caroline, Krakow, Lunds, Navarino, Pella, Tigerton, Zachow, Ada, Adell, Batavia, Cascade, Cedar Grove, Elkhart Lake, Gibbsville, Glenbeulah, Greenbush, Haven, Hingham, Howards Grove, Kohler, Oostburg, Plymouth, Random Lake, Sheboygan, Sheboygan Falls, Waldo, Esofea, Hillsboro, La Farge, Liberty Pole, Mount Tabor, Newry, Ontario, Readstown, Valley, Viola, Viroqua, Westby, Como, Darien, Delavan, Delavan Lake, East Troy, Elkhorn, Fontana, Genoa City, Honey Creek, Lake Beulah, Lake Geneva, Lyons, Pell Lake, Potter Lake, Sharon, Springfield, Walworth, Whitewater, Williams Bay, Zenda, Allenton, Colgate, Germantown, Hartford, Hubertus, Jackson, Kewaskum, Newburg, Plat, Richfield, Rockfield, Slinger, West Bend, Bethesda, Big Bend, Brookfield, Buena Vista, Butler, Chenequa, Delafield, Dousman, Eagle, Edgewood, Elm Grove, Genesee Depot, Hartland, Jericho, Lac La Belle, Lake Five, Lannon, Menomonee Falls, Merton, Monches, Monterey, Mukwonago, Muskego, Nashotah, New Berlin, North Lake, North Prairie, Oconomowoc, Oconomowoc Lake, Okauchee, Okauchee Lake, Pewaukee, Stonebank, Summit Corners, Sussex, Utica, Wales, Waterville, Waukesha, Big Falls, Chain O' Lakes, Clintonville, Embarrass, Fremont, Iola, King, Manawa, Marion, New London, Northport, Ogdensburg, Readfield, Royalton, Scandinavia, Sheridan, Symco, Waupaca, Weyauwega, Auroraville, Borth, Coloma, Hancock, Lohrville, Pine River, Plainfield, Poy Sippi, Redgranite, Saxeville, Tustin, Wautoma, West Bloomfield, Wild Rose, Allenville, Butte des Morts, Eureka, Fox Crossing, Larsen, Menasha, Neenah, Omro, Oshkosh, Pickett, Waukau, Winchester, Winnebago, Winneconne, Arpin, Auburndale, Babcock, Biron, Blenker, Dexterville, Hewitt, Lake Wazeecha, Marshfield, Milladore, Nasonville, Nekoosa, Pittsville, Port Edwards, Rudolph, Vesper, and Wisconsin Rapids
People Affected
48,085,282
Max Hail Size
3 in
Wind Gusts
80 mph

...SUMMARY...VERY LARGE HAIL WITH INITIAL SUPERCELLS WILL GRADUALLY TRANSITION TO WIDESPREAD DAMAGING WINDS...

...DISCUSSION...

SEVERAL SUPERCELLS SPREADING EAST WILL GRADUALLY GROW UPSCALE INTO AN MCS THIS EVENING INTO THE OVERNIGHT HOURS ACROSS SOUTHERN WISCONSIN. MODERATE TO INSTABILITY WITH MLCAPE OF 1500-2500 J/KG AND INTENSE DEEP-LAYER SHEAR OVER 50-60KT WILL SUPPORT CONTINUED ORGANIZATION AND INTENSIFICATION OF THESE STORMS. VERY LARGE HAIL UP TO 3 INCHES AND DAMAGING WINDS WITHIN INITIAL SUPERCELLS WILL GRADUALLY TRANSITION TO A THREAT FOR NUMEROUS DAMAGING WINDS, WITH EMBEDDED SWATHS OF 75-80MPH EXPECTED. A QLCS TORNADO OR TWO CANNOT BE RULED OUT.



...HAZARDS...
...PROBABILITY OF TORNADOES...20%...
...PROBABILITY OF INTENSE TORNADOES (EF-2+)...<5%...
...PROBABILITY OF DAMAGING WIND...80%...
...PROBABILITY OF SIGNIFICANT DAMAGING WINDS (> 75 MPH)...50%...
...PROBABILITY OF HAIL...60%...
...PROBABILITY OF SIGNIFICANT HAIL (> 3 INCHES)...50%...

...PRECAUTIONARY/PREPAREDNESS ACTIONS...
...REMEMBER...THIS ADVISORY MEANS THAT SEVERE WEATHER IS POSSIBLE IN AND CLOSE TO THE ADVISORY AREA. PERSONS IN THESE AREAS SHOULD REMAIN ALERT AND BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS.
PLEASE STAY TUNED TO YOUR LOCAL USA WEATHER FORECAST OFFICE FOR THE LATEST INFORMATION. BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND STAY TUNED FOR LATER STATEMENTS AND POSSIBLE ALERTS.

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