Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 240859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT TUE APR 24 2018

...Today in metro Denver weather history...

22-24 In 2010...a potent spring storm brought heavy...wet snow to
        areas in and near the Front Range Foothills and widespread
        rainfall across the adjacent plains.  In the Front Range
        Foothills and North-Central Mountains east of the
        Continental Divide...storm totals ranged from 15 to 30
        inches.  Storm totals included:  29.5 inches...3 miles
        southeast of Pinecliffe; 27 inches...8 miles northeast
        of Four Corners; 23 inches at Willow Creek; 22.5 inches...
        13 miles northwest of Golden; 21 inches at Never Summer;
        17 inches at Eldorado Springs; 16.5 inches...3 miles west
        of Jamestown.  Denver International Airport reported just
        a trace of snowfall...but measured 2.01 inches of rainfall
        for the duration of the storm. In addition...a peak wind
        gust to 54 mph from the northwest was observed at the
        airport on the 23rd
23-24 In 1883...snowfall totaled 7.6 inches in downtown Denver.
      In 1904...a thunderstorm produced hail during the late evening
        of the 23rd.  Apparent post-frontal rain changed to snow
        during the early morning of the 24th...but totaled only 2.0
        inches.  Precipitation consisting of rain...melted hail...and
        snow totaled 0.60 inch.  Northeast winds were sustained to
        41 mph with gusts as high as 52 mph on the 24th.
      In 1905...rain changed to snow and totaled 8.0 inches.  Much
        of the snow melted as it fell with only 2.5 inches measured
        on the ground.  Precipitation totaled 1.88 inches.
        Northeast winds were sustained to 20 mph on the 23rd.
      In 1942...the South Platte River reached flood conditions in
        the city.  As many as 15 thousand residents were warned
        to evacuate their homes temporarily.  Two lives were lost
        in the city.  Four bridges were washed out by the flood
        waters and other bridges were endangered.  The damage was
        generally limited to bridges that were in poor condition.
        However...the flood waters did not overflow their channel
        banks within the city limits.
      In 1980...heavy rain began in the eastern foothills on the
        night of the 23rd and turned to heavy wet snow on the 24th.
        Up to a foot and a half of snow fell in the foothills west
        of Denver.  At Stapleton International Airport precipitation
        totaled 1.58 inches...but only 3.7 inches of snow fell from
        the storm.  East winds gusted to 24 mph.
      In 1997...locations in and near the foothills received the
        greatest snow of the year as a winter-like storm system
        moved into metro Denver.  East to southeast winds at speeds
        of 15 to 35 mph were common with even stronger gusts above
        9 thousand feet.  Snow fell at a rate of 2 to 3 inches an
        hour as deep upslope combined with a moist and unstable
        air mass.  The snow began in the foothills above 7500 feet
        during the evening of the 23rd.  By sunrise the snow level
        had dropped to 5000 feet.  The hardest hit areas extended
        from I-25 into the foothills.  Snowfall totals in the
        foothills ranged from 1 1/2 to over 3 1/2 feet.  In the
        city...snowfall ranged from 8 to 18 inches.  Some snowfall
        amounts included:  36 inches at Coal Creek Canyon; 31 inches
        at Nederland and Wondervu; 20 to 24 inches near Blackhawk...
        at Echo Lake...and North Turkey Creek Canyon; 15 to 19 inches
        at Boulder...Central City...Conifer...Evergreen...Georgetown...
        and Louisville; 8 to 14 inches in Arvada...Broomfield...
        Westminster...Wheat Ridge...Castle Rock...and Ken Caryl Ranch.
        Only 2.3 inches of snow fell at the site of the former
        Stapleton International Airport on the 24th.  East winds
        gusted to 36 mph at Denver International Airport on the
      In 2003...a strong and deep northerly flow circulating around
        a closed upper low pressure center allowed heavy snow to
        fall in the mountains and eastern foothills.  Snowfall
        totaled 14 inches in Idaho Springs.  Rain was mixed with
        snow and thunder across metro Denver.  Snowfall was only
        0.9 inch overnight at the site of the former Stapleton
        International Airport.  Precipitation totaled 1.34 inches
        at Denver International Airport...where northwest winds
        gusted to 55 mph on the 23rd.
      In 2007...a storm system intensified over Southeast Colorado...
        allowing for heavy snow and rain to develop over much of
        North-Central and Northeast Colorado.  Severe thunderstorms
        preceded the storm system on the 23rd...affecting the Urban
        Corridor.  Nickel size hail was reported in Boulder and a
        small landspout touched down near Byers.  On the 24th...heavy
        snow fell in the foothills west of Denver and Boulder...where
        storm totals ranged from 1 to 2 feet.  Heavy snow also
        occurred along the Palmer Divide...with storm totals of 10 to
        16 inches.  Elsewhere...a steady moderate to heavy rainfall
        was reported.  Denver International Airport measured 2.09
        inches of rainfall...which shattered the previous 24-hr
        record of 1.29 inches for the 24th of April.  The heavy wet
        snow caused several power outages.  In some instances it
        took several days to restore power.  Several road closures
        were reported...including Interstates 25 and 70.  A jacknifed
        semi-trailer backed up traffic for nearly 20 miles...on
        southbound I-25...between Denver and Colorado Springs.  In
        addition...a 50-ton boulder blocked the southbound lane of
        State Highway 285...near Parmalee Gulch.  Crews had to use
        explosives to break up the boulder and clear the debris.
        Stranded buses and impassable roadways also forced several
        school closures.
23-25 In 1935...heavy wet snow fell across metro Denver.  The storm
        started as rain on the 23rd and changed to snow early on the
        morning of the 24th.  There was continuous precipitation for
        a period of 48 hours.  Snowfall totaled 19.0 inches over the
        city and 20.0 inches at Denver Municipal Airport.  However...
        due to warm temperatures in the 30`s...much of the snow
        melted as it fell and did not seriously disrupt traffic.
        The greatest snow accumulation on the ground downtown was
        12 inches...but it quickly melted.  The highest sustained
        wind speed recorded during the storm was 28 mph from the
        north on the 23rd.  The storm contained 3.16 inches of
24    In 1959...wind gusts to 60 mph recorded in downtown Boulder
        caused very limited minor damage.  West winds gusted to
        38 mph at Stapleton Airport.
      In 1986...a wind gust to 60 mph was clocked at Golden Gate
      In 1989...1 3/4 inch diameter hail was reported in Lafayette.
        Boulder and Louisville reported 3/4 inch hail.
24-25 In 1890...rain changed to snow and totaled 7.0 inches in
        downtown Denver.
      In 1931...heavy snowfall totaled 9.3 inches over downtown
        Denver.  Winds were light during the storm.
      In 1996...the second wind storm in less than a week developed
        east of the Continental Divide and spread over metro
        Denver.  High winds gusted from 60 to 90 mph.  Several
        power lines and poles were downed.  Some of the stronger
        wind gusts included:  91 mph atop Squaw Mountain west of
        Denver...90 mph atop Table Mesa near Boulder...85 mph in
        Golden Gate Canyon...and 82 mph at Wondervu.  Northwest
        winds gusted to 41 mph at Denver International Airport
        on the 25th.
24-26 In rain changed to snow...which became
        heavy and totaled 10.2 inches over downtown Denver.  The
        greatest amount of snow on the ground was 6.0 inches on the
        25th due to melting.  North winds were sustained to 38 mph
        with gusts to 42 mph on the 24th.

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