1898: The first Weather Bureau kite was launched in Topeka, Kansas to report daily, early morning, atmospheric observations. By year’s end, 16 additional launch sites would be in operation.
Source: The Weather Doctor.
1912: The April 27-28, 1912 outbreak was the climax of a wild, week-long period of severe weather that occurred in Oklahoma. Strong to violent tornadoes struck portions of central and north-central Oklahoma on April 20, 1912. Also, a violent tornado hit Ponca City, OK on April 25, 1912. From the 27 through the 28th, 16 tornadoes rated F2 or greater touched down in the state with 6 of them rated F4. About 40 people were killed, and 120 people were injured by the storms.
Source: NWS Office in Norman, Oklahoma.
1931: The temperature at Pahala, located on the main island of Hawaii, soared to 100 degrees to establish a state record.
1971: An F3 tornado passed approximately 25 miles east-southeast of the Nashville Metropolitan Airport.
— NWS Nashville (@NWSNashville) April 13, 2017
2003: For only the 11th time since records began in 1871, hail was observed in Key West Florida. A severe thunderstorm produced hail to 1.75 inches in diameter which easily broke the previous record of a half an inch in diameter which was set on May 10, 1961.
— NWS Key West (@NWSKeyWest) April 27, 2017
2011: April 27 was the single deadliest day for tornadoes since records began in 1950. The death toll from Wednesday’s 199 tornadoes surpassed 300. The worst day in recorded history for storm fatalities is March 18, 1925, with 747 deaths. Of the 316 deaths reported, 313 were associated with the afternoon/evening tornadoes. In all, 31 of these tornadoes were rated as EF3 or stronger. Eleven tornadoes were rated EF4, and four were rated EF5. The average EF4 and EF5 tornado path length were 66 miles.
Source: NWS Office in Birmingham, Alabama.
— U.S. Tornadoes (@USTornadoes) April 27, 2017
— Dick McGowan (@stormpics) March 19, 2017