The April 20, 2004, tornado outbreak was a tornado outbreak that affected parts of the U.S. Upper Midwest on April 20, 2004.
 Thirty tornadoes formed in eastern Iowa, extending into northern and central Illinois and Indiana.
 A tornado that struck Utica, Illinois, was the only one to cause fatalities.
 An unusual feature of the outbreak is the fact that it was largely unexpected, as the SPC only issued a "See Text" outlook area the day of the event.
Hurricane Danny was the only hurricane to make landfall in the United States during the 1997 Atlantic hurricane season, and the second hurricane and fourth tropical storm of the season.
 The system became the earliest-formed fifth tropical or subtropical storm of the Atlantic season in history when it attained tropical storm strength on July 17, and held that record until the 2005 Atlantic hurricane season when Tropical Storm Emily broke that record by several days.
 Like the previous four tropical or subtropical cyclones of the season, Danny had a non-tropical origin, after a trough spawned convection that entered the warm waters of the Gulf of Mexico.
 Danny was guided northeast through the Gulf of Mexico by two high pressure areas, a rare occurrence in the middle of July.
 After making landfall on the Gulf Coast, Danny tracked across the southeastern United States and ultimately affected parts of New England with rain and wind.
Tropical Storm Ana was the earliest recorded tropical cyclone to make landfall in the United States in any given year.
 A relatively rare pre-season system, Ana was the first tropical storm of the 2015 Atlantic hurricane season.
 It developed as a subtropical cyclone from a non-tropical low north of the Bahamas, and intensified to attain peak winds of 60 mph before transitioning into a fully tropical cyclone early on May 9.
 Sustained in part by the warm waters of the Gulf Stream, Ana made landfall along the northeast coast of South Carolina early the next morning, becoming the earliest U.S. landfalling system on record.
 Overall, damage from the storm was minor.
 Heavy rainfall and gusty winds affected parts of the Carolinas, and some vulnerable beaches endured coastal flooding and several feet of erosion.
 Gusty winds damaged trees and powerlines, causing sporadic power outages, and a weak tornado was reported in association with Ana.
 In North Carolina, two deaths—one direct and one indirect—were attributed to the storm.
The Upper Midwest forest-savanna transition is a terrestrial ecoregion that is defined by the World Wildlife Fund.
 An oak savanna plant community located in the Upper Midwest region of the United States, it is a transitory ecotone between the tallgrass prairies to the west and the temperate deciduous forests to the east.
 A part of the Upper Mississippi River basin, it is considered endangered with less than 5% of the original ecosystem remaining intact, due mostly to overgrazing and conversion to agriculture.
The Early December 2007 North American winter storm was a major winter storm which affected the majority of the United States and portions of southern Canada from November 29 to December 5, hitting the Intermountain West and Midwestern United States, the Great Lakes region and the Northeast.
 The storm brought significant snows to portions of the Upper Midwest, Great Plains and Great Lakes regions of the United States and Canada on December 1 with a major winter storm for Quebec, Ontario and parts of the Northeast region on December 2 and 3 as well as the Canadian Maritimes on December 4 and 5.
 The system was also responsible for a major ice storm across the Midwestern states which caused disruptions to several major cities including Des Moines, Chicago, Detroit, Milwaukee and Toronto.
 The storm was blamed for at least 16 deaths across nine US states and one Canadian province.
 10 traffic deaths had been reported, as of 2 December 2007.
Tropical Storm Ignacio was a weak tropical cyclone affected parts of the western United States in August 1997.
 The 12th tropical cyclone and 9th named storm of the 1997 Pacific hurricane season, Ignacio formed west of Mexico from a weather disturbance embedded within a more broad system.
 It was classified as a tropical depression on August 17, and although it quickly intensified into a tropical storm, harsher environmental conditions caused it to begin weakening as the cyclone moved northward.
 On August 19, Ignacio transitioned into an extratropical cyclone as it approached California, where its remnants produced unprecedented August rainfall, numerous traffic accidents, and 78,000 power outages.
The 1991 Perfect Storm, also known as The No-Name Storm (especially in the years immediately after it took place) and the Halloween Gale, was a nor'easter that absorbed Hurricane Grace and ultimately evolved back into a small unnamed hurricane late in its life cycle.
 The initial area of low pressure developed off Atlantic Canada on October 29.
 Forced southward by a ridge to its north, it reached its peak intensity as a large and powerful cyclone.
 The storm lashed the east coast of the United States with high waves and coastal flooding before turning to the southwest and weakening.
 Moving over warmer waters, the system transitioned into a subtropical cyclone before becoming a tropical storm.
 It executed a loop off the Mid-Atlantic states and turned toward the northeast.
 On November 1 the system evolved into a full-fledged hurricane with peak winds of 75 miles per hour (120 km/h), although the National Hurricane Center left it unnamed to avoid confusion amid media interest in the predecessor extratropical storm.
 It later received the name "the Perfect Storm" (playing off the common expression) after a conversation between Boston National Weather Service forecaster Robert Case and author Sebastian Junger.
 The system was the fourth hurricane and final tropical cyclone in the 1991 Atlantic hurricane season.
 The tropical system weakened, striking Nova Scotia as a tropical storm before dissipating.
Tropical Storm Felice was a modest tropical cyclone that lightly affected parts of the Gulf Coast of the United States in mid-September 1970.
 Spawned by an upper-level trough over the Bahamas, the system crossed the Florida Keys and entered the Gulf of Mexico, where it gradually began to strengthen.
 Felice was a disorganized storm for its entire duration, plagued by dry air, a lack of deep thunderstorm activity, and an ill-defined center of circulation, but nevertheless managed to peak as a high-end tropical storm with winds just below Category 1 hurricane strength.
 Tracking northwestward, the storm brushed southern Louisiana on September 15 before making landfall northeast of Galveston, Texas, late that same day.
 Once ashore, Felice quickly deteriorated as it recurved into the central United States.
 While over southeastern Oklahoma, however, its remnants still closely resembled a formidable tropical cyclone.
The March 2017 North American blizzard was a major late-season blizzard that affected the Northeastern United States, New England and Canada, dumping up to 3 ft of snow in the hardest hit areas, mainly New York, Vermont, New Hampshire and Southern Quebec.
 Forming out of an extratropical cyclone near the Northwest, the storm system dived into the northern portions of the United States, dropping light to moderate snow across the Great Lakes, Upper Midwest on March 11–12 before reaching the Ohio Valley the next day.
 It later coalesced into a powerful nor'easter off the East Coast, producing a swath of heavy snowfall across a large portion of the Northeast.
 The storm was given various unofficial names, such as "Winter Storm Stella", "Blizzard Eugene", and "Blizzard of 2017".
The 1991 Halloween blizzard was powerful storm that caused a period of heavy snowfall and ice accumulation, which affected parts of the Upper Midwest of the United States, from October 31 to November 3, 1991.
 Over the last week of October 1991 a large storm system over the Atlantic Ocean (1991 Perfect Storm) blocked most of the weather patterns over the eastern half of the United States, and in turn moisture from the Gulf of Mexico was funneled straight northward over the affected region.
 By the time the precipitation stopped falling many cities in the eastern half of Minnesota and northwestern Wisconsin had witnessed record early-season snowfall accumulations, while parts of southern Minnesota and northern Iowa were crippled by a large ice storm.
 Arctic air that was pulled southward behind the storm had combined with the heavy snow pack to produce many record low temperatures.
 Between the blizzard and the ice storm 22 people were killed and over 100 were injured.

Question: Who named the storm which affected parts of the Upper Midwest of the United States, from October 31 to November 3, 1991
Answer: Robert Case and author Sebastian Junger.