Meteorological events that happened on June 18th:
No measurable rainfall has fallen in Las Vegas, NV on this date since records began in 1937.
There is at least one tornado touchdown somewhere in the United States on at least half the days in a typical year. An outbreak of more than 10 tornadoes in a single day occurs around 9 times a year or 2.4% of the days.
A tornado moved southeast across west central Illinois, touching down midway between Canton and Fairview. Farms were destroyed before the tornado moved across Canton, where 50 buildings were damaged or destroyed. The tornado killed 8 people, including the founder of Canton and his son.
A severe coastal storm, possibly a hurricane struck the Atlantic coast from Cape Cod to Nova Scotia. Eastport, ME reported wind gusts to 57 mph.
Just before sundown a heavy squall line 4 to 5 miles offshore and paralleling the Florida Keys for 15 to 18 miles, developed 11 funnel clouds. At least five reached the water.
Hailstones up to four inches in diameter killed livestock as a storm passed from Joliet to Belfry in Carbon County, Montana.
A tornado moved from south-southwest to north-northeast damaging three farmsteads between Hoven to 8 miles north-northwest of Bowdle in South Dakota. This tornado was estimate to have F2 strength. An estimated five inches of rain fell in three hours near Bowdle causing soil erosion just before the tornado hit. Another storm moved from south to north and intensified as it moved northward. Winds were estimated between 50 and 100 mph. The greatest damage was in McPherson County where it was estimated 2 million dollars in crop damage occurred. Heavy rain was also observed on this day. Some storm total rain fall includes; 6.73 inches in Eureka, 4.28 in Roscoe, 3.75 in Leola, 2.68 in Shelby, 2.45 in Britton, and 2.31 inches in Ipswich.
Wind and rain, and hail up to seven inches deep caused more than $5 million dollars damage at Oberlin, KS.
Hurricane Agnes moved northward through the Gulf of Mexico at 10 to 15 mph about 200 miles off the west coast of Florida. It was well west of Ft. Myers at 2000 on the 18th and passed west of Tampa near 0600z on the 19th and made landfall in the Panhandle near Cape San Blas in the afternoon. Gale force winds were felt throughout the state, but no hurricane force winds were reported. Agnes spawned the worst tropical cyclone severe weather outbreak in Florida history on this date and the 19th when the outer rainbands produced tornadoes and severe thunderstorms over the peninsula. Almost two dozen tornadoes and windstorms were reported from the Keys to Cape Canaveral. Six people were killed and 40 injured in Okeechobee when a series of windstorms, that may have been tornadoes, destroyed mobile homes at 2255z on the 18th. The highest tides in many years along the west coast destroyed homes and businesses, washed away roads and cut off access to many offshore islands. There was severe beach erosion. Damage estimates total $5 million dollars to public property and $36 million dollars to private property. One person drowned on the west coast and another death was attributed to a storm-related fatal heart attack.
The latest significant snow (2 inches or more) on record for the Black Hills in South Dakota occurred on this date when portion of the Hills received up to 8 inches.
It was a hot day in the Upper Great Lakes Region. Several cities in Michigan and Wisconsin reported record high temperatures for the date. The high of 90° at Marquette, MI marked their third straight day of record heat. Genoa, WI recorded their hottest June temperature of 101°.
Severe thunderstorms in the Northern and Central Plains Region spawned six tornadoes in Wyoming and Colorado. Wheatridge, CO was deluged with 2.5 inches of rain in just one hour.
Severe thunderstorms in eastern North Dakota and northern Minnesota produced hail 3 inches in diameter and spawned 4 tornadoes in Steele County. Thunderstorms also produced wind gusts to 80 mph at Clearbrook, MN.
A weak tornado touched down in northeast Cheyenne, WY. The tornado, which destroyed a storage shed, was unusual in that it rotated anti-cyclonically (clockwise) instead of the usual counter-clockwise direction.
Unseasonably hot weather prevailed in the southwestern U.S. In Arizona, afternoon highs of 116° at Yuma, 115° at Phoenix, 113° at Tucson and 103° at Winslow were records for the date.
A cold front, accompanied by severe thunderstorms, moved quickly across western and central New York during the morning hours. The thunderstorms downed trees and power lines causing numerous power outages. Near zero visibilities from heavy rain and downed power lines also caused traffic problems during the morning rush hour. Several reports of homes damaged by falling trees were received. A state of emergency was declared in Brownville as downed trees and power lines blocked the main streets. Two people were trapped in their cars when live wires fell onto the street. Two trailers were overturned in Antwerp. A waterspout was sighted in Henderson Harbor. The water rose 10 feet near the waterspout, reported to be 150 feet high, 30 feet in diameter, and lasting six minutes.
Atlanta, GA recorded a new record for the amount of rainfall in one hour as 3.47 inches fell between 6:52 pm and 7:52 pm EDT.
Indianapolis, IN was belted with a vicious severe thunderstorm during the early morning hours. It produced the entire cycle of severe weather types. A tornado was reported five miles to the northwest, hail 1.25 inches in diameter fell, winds gusted to 62 mph, continuous lightning was observed, and 2.05 inches rain fell for the storm with 1.19 inches falling in one hour. The airport control tower was evacuated during the height of the storm.
Severe thunderstorms brought very large hail to parts of central and north-central Oklahoma. Baseball-size hail fell near Yale, Kingfisher, Cashion, and El Reno. The hail damaged roofs, windows, and automobiles. The storms also produced four weak, short-lived tornadoes. This event marked the highlight of the biggest daily sustained late season severe weather outbreak across the U.S. on record. More than 800 reports of severe weather, including 172 tornadoes, poured into the National Severe Storms Forecast Center from the 15th to the 19th.
In west central Kansas, heavy rain caused roads in the Syracuse area to flood. As much as one foot of water covered some roads for a short period of time. In Greeley County, golf ball size hail, driven by thunderstorm winds, damaged wheat and broke windows along a four mile path from five miles south of Astor to nine miles south of Astor. Trees were also blown down.
A strong upper level heat ridge covering more than two-thirds of the country extended from the southwest to the northeast created numerous record highs for the date including: Detroit, MI: 99°, Madison, WI: 99°, Rockford, IL: 99°, Lansing, MI: 98°, Moline, IL: 98°, Fort Wayne, IN: 98°, South Bend, IN: 98°, Toledo, OH: 98°, Flint, MI: 97°, Houghton Lake, MI: 97°, Springfield, IL: 97°, Pittsburgh, PA: 97°, Williamsport, PA: 97°, Grand Rapids, MI: 96°, Mansfield, OH: 93°, Muskegon, MI: 91°, Indianapolis, IN: 96°, Buffalo, NY: 95° and Avoca, PA: 93°.
A strong heat ridge extending from the central U.S. to the east coast provided record high temperatures for the date including: International Falls, MN: 99°, Alpena, MI: 97°, Marquette, MI: 96°, Green Bay, WI: 96°, La Crosse, WI: 96°, Milwaukee, WI: 96° and Duluth, MN: 94°.
Thunder Bay, Ontario Canada soared to record high of 102.2°.
Over 6 inches of rain fell at Columbia, MS in a three hour period and 8.25 inches fell in a 24 hour period. Water entered thirty businesses in Columbia, with 12 of the businesses suffering major damage. Eight homes also suffered flood damage. Many roads were washed out and had to be closed. Numerous cars were under water. This event caused $15 million dollars in property damages. Several roads were also flooded across the south half of Forrest County.
A weak tornado touched down in northeast Cheyenne, WY. The tornado, which destroyed a storage shed, was unusual in that it rotated anti-cyclonically instead of the usual counter-clockwise direction.
Severe thunderstorms moved across a large portion of northern and central Illinois. Most of the damage occurred in the northeast part of the state, from near Rockford to the Chicago area. In Boone County, a 120-year-old barn was destroyed. Vehicles were blown off I-80 in Joliet, several schools in the Chicago area had damage, and numerous trees and power lines were blown down. A waterspout also formed on Lake Michigan.
Heavy rain of 3 to 4 inches fell during the late evening and early morning hours across part of eastern Faulk County in South Dakota. Several roads were flooded with some being closed. Officially, 2.94 inches of rain fell in Faulkton.
Record morning chill occurred across the Plains, Midwest and Appalachians. Record lows for the date included: Lansing, MI: 37°, Elkins, WV: 39°, Muskegon, MI: 41°, Flint, MI: 41°, Pittsburgh, PA: 43°, Bluefield, WV: 46°, Covington, KY: 49° and Jackson, KY: 52°.
An F3 tornado struck the small town of Siren, MN, killing three people and injuring 16 others. The twister damaged or destroyed nearly half of the town's homes and businesses. A tornado warning was issued 50 minutes before the storm struck, but the town's warning siren had been knocked out by a storm earlier in the year. The siren would have been rendered useless since the power went out anyway. An important lesson from the Siren storm: sirens should not be depended upon for receiving warnings: Purchase a Weather Radio.
Much of central Europe enjoyed a very hot day; temperatures in the Netherlands peaked close to 95° in Arcen, while over the border in Koblenz the high of 102.9°, a new record June high. Meanwhile, the day before Auxerre in France reached 99°.
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