


Public Information Statement
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
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016 NOUS45 KBOU 200859 PNSBOU COZ030>051-202300- Public Information Statement National Weather Service Denver/Boulder CO 259 AM MDT WED AUG 20 2025 ...Today in metro Denver weather history... 19-30 In 1875...grasshoppers appeared in great numbers at 10:00 AM on the 19th and continued through the 30th. Thousands landed on the ground. The streets were literally covered with them. Swarms of grasshoppers were seen on each day. All gardens in the city were devastated...and in the countryside the grasshoppers were very destructive to ripened grain. On the 30th the grasshoppers were so numerous as to almost darken the sun. 20 In 1980...winds to 55 to 60 mph were recorded in south Boulder. In 1982...strong thunderstorm winds blasted the Jefferson County Airport near Broomfield...causing an estimated 3 million dollars in damage. At least 5 hangars and 15 airplanes were damaged...many seriously; one hangar was completely destroyed. Torrential rains accompanied the winds. Heavy rains also dumped on Boulder where 1.65 inches fell in just 15 minutes...causing street flooding. Wind gusts to 72 mph were recorded in Boulder. Over half an inch of rain fell in just 5 minutes in Littleton where two homes were struck by lightning. Lightning also struck a house in Arvada where over an inch of rain sent Ralston Creek over its banks. Strong winds accompanied the storms. In 1984...slow moving thunderstorms dumped 1.25 inches of rain in Evergreen...causing street flooding. A half inch of rain fell in just 18 minutes in southeast Denver. Littleton and Boulder were also drenched with about an inch of rain. Rainfall totaled 0.92 inch at Stapleton International Airport. In 2001...severe thunderstorms produced damaging winds and large hail across metro Denver. Hail as large 1 inch in diameter fell in Aurora near Cherry Creek. Strong thunderstorm winds gusting as high as 58 mph blew the roof from a building between Thornton and Denver and toppled several trees in Denver. One tree landed on a mail truck. Other thunderstorm winds were clocked to 60 mph near Parker... 62 mph in Broomfield...and 61 mph at Denver International Airport. In 2006...a tornado (F0) touched down near Bennett...but caused no reported damage. In 2013...severe thunderstorms pounded the southern Denver suburbs and other parts of the Front Range. In Jefferson County...water rescues were reported for some people in stranded cars. In the Ken Caryl area...large hail from one inch to 1 3/4 inches in diameter was reported. On West Chatfield Avenue in Jefferson County...hail runoff gathered six inches deep in spots and "hail plows" were sent out to clear some streets. Hail up to one inch in diameter was also reported near Castle Rock. In 2022...a severe thunderstorms produced hail up to 1 1/4 inch near Aspen Park in Jefferson County. $$