Public Information Statement
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
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964 NOUS45 KBOU 220859 PNSBOU COZ030>051-222300- Public Information Statement National Weather Service Denver/Boulder CO 259 AM MDT SAT JUN 22 2024 ...Today in metro Denver weather history... 21-22 In 1941...strong thunderstorms produced cloudbursts of rain in Boulder County...starting during the late evening of the 21st and continuing overnight into the 22nd. The heavy rains over the Boulder Creek...Left Hand Creek...and South St Vrain River basins produced flooding in already swollen streams and turned dry gulches into raging torrents. The force of the floodwaters swept a man from the arms of his wife to his death...severely damaged canyon homes and swept others away...and hurtled a car down a steep embankment after the driver narrowly escaped. West of Boulder...the Boulder Canyon highway was littered with rocks and debris and collapsed when two culverts were washed away. The flood waters washed much debris down Four Mile Canyon... damaging the road near the creek bed. A bridge over Dry Creek just south of Niwot was completely washed away. In 1964...scattered hail and rain caused property damage and local flooding in Boulder. In 1989...an unseasonably cold weather system produced strong winds over much of metro Denver and snowfall in the foothills as low as 7500 feet elevation. One to 6 inches of snow fell in the foothills west of Denver with 15 inches reported on the summit of Mount Evans. Six inches of snow were measured at Conifer. Rainfall totaled only 0.09 inch at Stapleton International Airport where northwest winds gusted to 29 mph on the 21st. 22 In 1872...small sandstorms...frequently seen on the prairie... occasionally passed through the city. In 1983...3/4 inch hail was observed at Deckers...and a thunderstorm produced wind gusts to 55 mph at Littleton. In 1988...a tornado was spotted one mile east of Brighton; it remained on the ground for about 6 minutes...but did no reportable damage. Lightning damaged a home near Castle Rock. In 1991...thunderstorms produced golf ball size hail in Lafayette. The strongest storms occurred north of metro Denver. In 1992...nickel size hail was reported just east of Parker. In 1995...large hail 3/4 to 1 3/4 inches in diameter fell in Castle Rock where a funnel cloud was sighted. Hail 3/4 inch to 1 inch in diameter fell in south Denver and Aurora. A funnel cloud was also sighted over Chatfield Reservoir. In Bennett...very strong dry microburst winds of unknown speeds ripped a 14-foot by 48-foot metal roof off of a barn. The roof was tossed approximately 250 yards. A few 150- pound railroad ties were moved 10 to 15 feet. In 1997...a tornado touched down near the Adams County Fair Grounds northeast of Denver...uprooting several trees and damaging a car. A dry microburst produced a brief wind gust to 69 mph at Jefferson County Airport. A small brief tornado was sighted near Hudson...but did no reported damage. In 1998...3/4 inch hail fell near Hudson. In 1999...thunderstorm winds gusted to 63 mph at Denver International Airport. In 2003...hail as large as 2 inches in diameter was measured in Fort Lupton with 3/4 inch hail in Erie and near Boulder. In 2006...a small tornado (F0) touched down near Franktown... but caused no damage. In 2008...strong winds from dry microbursts developed over parts of southern Weld and western Arapahoe Counties. A peak gust of 60 mph was observed in Centenniel. Near Frederick...strong winds snapped 3 power poles and sparked a small grassfire near State Highway 52 and Interstate 25. At Denver International Airport...a peak gust of 31 mph was observed. In 2009...hail up to 2 inches in diameter was observed near Crescent in Boulder County. In 2023...an tornado touched down just south of CO-470 in Highlands Ranch and lifted just west of I-25 near Lone Tree in Douglas County. Most of the damage was EF0 but there were some pockets of EF1 damage; it was on the ground for 26 minutes. The severe thunderstorm also produced large hail up to 2 1/2 inches in diameter. The tornado track was from 2 miles west of Highlands Ranch to 2 miles north-northeast of Surrey Ridge with a path length of 8.36 miles. The maximum width of the tornado was approximately 50 yards There were no injuries. 22-26 In 2012...from the 22nd to the 26th...the maximum temperature exceeded 100 degrees for five consecutive days. Two of the high temperatures on the 25th and 26th peaked at 105 degrees...which set the all time record for the month of June and tied the all-time maximum temperature for Denver. $$