Public Information Statement
Issued by NWS Denver/Boulder, CO

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COZ030>051-242300-

Public Information Statement
National Weather Service Denver/Boulder CO
645 PM MDT SAT APR 23 2016

...This week 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
        24th.
      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
        moisture.
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
        Canyon.
      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 1924...post-frontal 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.
25    In 1902...northeast winds were sustained to 42 mph with gusts
        to 48 mph.
      In 1908...north winds were sustained to 40 mph behind an
        apparent cold front.  Snowfall was 0.5 inch.
      In 1928...rain changed to snow...which became heavy and totaled
        7.4 inches in downtown Denver.  Due to melting...the maximum
        snow depth on the ground was 4.0 inches at 6:00 PM.  This
        was the last snow of the season.  Southeast winds were
        sustained to 19 mph with gusts to 20 mph.
      In 1976...a south wind gust to 54 mph was recorded at
        Stapleton International Airport.  The high winds toppled a
        70-foot high cottonwood tree onto the rear of house and a
        neighboring residence in central Denver.
      In 1989...lightning caused heavy damage to a radio transmitter
        in Parker...knocking a Denver area radio station off the air
        for 3 hours.
      In 1994...weather spotters reported dime-size hail at the
        intersection of U.S. Highway 287 and C470 in Jefferson
        County.  Marble-size hail covered the ground near Golden
        to a depth of 1 inch.  Pea-size hail was reported covering
        the ground to a depth of 3 inches in Arvada.
25-26 In 1985...a spring storm brought much rain and snow to metro
        Denver.  The foothills were buried with 15 inches of snow
        at Conifer and 12 inches at Evergreen.  At lower elevations...
        an inch or more of rain fell in Denver and Boulder.  The
        heavy precipitation caused brief power outages in the
        Denver area.  Precipitation totaled 1.06 inches at Stapleton
        International Airport...including only 0.7 inch of snowfall.
25-27 In 1877...snow ended around 7:00 AM on the morning of the 27th...
        after falling continuously for 48 hours and totaling an
        estimated 13 inches in the city.  The storm...likely
        accompanied by strong winds...caused trains to be delayed
        for 2 to 3 days.  One or two roofs of small buildings were
        crushed by the weight of the snow...and many tree branches
        were broken in the city.  There were a number of reports of
        livestock losses.  One stockman lost 17 horses and several
        cattle from the snow and cold.  Precipitation totaled
        1.30 inches from the storm.
26    In 1965...while only 0.40 inch of rain fell at Stapleton
        International Airport...some communities in the foothills
        west of Denver reported over 30 inches of snow from the
        storm.
      In 1972...a spring snow storm accompanied by thunder dumped
        15.8 inches of heavy wet snow on metro Denver.  Strong
        northwest winds gusting to 35 mph produced blowing snow.
        The storm was quite intense and greatly hampered travel.
        High winds caused drifts 10 to 15 feet deep in some areas...
        blocking roads and stranding hundreds of motorists.  An
        estimated 500 to 600 people were stranded in the Castle
        Rock area.  Rescue service was provided by heavy Army
        equipment from Fort Carson.  Power lines were downed...power
        poles were toppled...and a number of steel towers carrying
        high voltage power lines were downed.  Some areas northeast
        of Denver were without power for a week.  A large number of
        cattle and sheep were killed by the storm.  The greatest
        snow depth on the ground at Stapleton International Airport
        was 12 inches.  Warm temperatures following the storm
        quickly melted the snow.
      In 1995...the third major snow storm of the month dumped heavy
        snow in and near the Front Range foothills.  Six to 12
        inches of heavy wet snow fell in the western metro suburbs
        with the heaviest amounts above 6 thousand feet.  Both
        Boulder and Golden measured 10 inches of snow.  Only 2.4
        inches of snowfall were measured at the site of the former
        Stapleton International Airport.  North winds gusted 28 mph
        at Denver International Airport.
      In 1998...the last in a series of April storms blanketed the
        foothills with heavy snow.  Snowfall amounts included:  17
        inches near Blackhawk...15 inches at Idaho Springs...14
        inches at Georgetown...11 inches near Conifer and Morrison.
        Only a trace of snow fell at the site of the former
        Stapleton International Airport.  North winds gusted to
        28 mph at Denver International Airport.
26-27 In 1906...rain changed to heavy snow overnight and totaled
        7.0 inches over downtown Denver.  North winds were
        sustained to 16 mph on both days.  Precipitation totaled
        2.16 inches.
      In 1932...the temperature remained below freezing for more
        than 30 consecutive hours.  For about 4 of those hours
        the temperature hovered around 24 to 25 degrees.  At this
        time some early cherry trees were in bloom and apple and
        lilac blossoms were beginning to open.  The leaves of
        many plants were partly unfurled and vegetation in general
        was correspondingly advanced due to the warm weather from
        the 11th to the 22nd.  However...there was little apparent
        injury to foliage and blossoms...but some of the early
        cherry and apple blossoms were injured.  Rain changed to
        snow on the 26th and continued intermittently through the
        27th.  Snowfall totaled only 2.0 inches and northeast winds
        gusted to 22 mph on the 26th.
      In 1964...strong winds caused damage to buildings...trees...and
        power lines.  Sustained winds of 37 mph with gusts of 50 to
        60 mph were recorded in metro Denver.  West-northwest winds
        gusted to 44 mph at Stapleton International Airport on the
        26th.
27    In 1955...west winds at 43 mph with gusts as high as 55 mph
        were recorded at Stapleton Airport where blowing dust
        briefly reduced the visibility to 3/8 mile.
      In 1966...a northwest wind gust to 51 mph was recorded at
        Stapleton International Airport.
27-28 In 1919...rainfall totaled 2.03 inches for the two days...
        along with a trace of snowfall.  Northwest winds were
        sustained to 24 mph with gusts to 26 mph on the 27th.
      In 1975...high winds gusting to 85 mph severely damaged a
        mobile home in Boulder and caused other minor damage.
        West winds gusted to 46 mph at Stapleton International
        Airport on the 28th.
      In 1996...heavy snow fell over portions of the Front Range
        foothills west of Denver.  Snowfall amounts ranged from
        4 to 7 inches.  Only 0.3 inch of snow fell at the site of
        the former Stapleton International Airport.  North winds
        gusted to 41 mph at Denver International Airport on the
        27th.
28    In 1894...southwest winds were sustained to 35 mph with gusts
        as high as 60 mph.
      In 1896...apparent post-frontal bora winds from the northwest
        were sustained to 43 mph with gusts as high as 56 mph.
        Rainfall totaled 0.22 inch.
      In 1990...high winds raked the northeastern plains and eastern
        foothills from Boulder north.  Wind gusts to 70 mph were
        recorded in Boulder.  West winds gusted to 41 mph at
        Stapleton International Airport.
      In 2001...a 21-year-old man was struck by lightning along the
        shoulder of I-225 near Parker Road.  His brother`s car had
        broken down and he stopped to help.  The bolt briefly
        stopped the man`s heart and caused the right side of his
        body to go numb.
      In 2003...severe thunderstorms produced large hail across
        southern metro Denver.  Hail to 1 3/4 inches in diameter
        fell in Englewood and 2 miles east of Centennial Airport.
        Hail as large as 1 1/2 inches in diameter fell in Aurora
        near Cherry Creek.  Other large hail reports included
        1 inch hail near Bennett...and 7/8 inch hail in Greenwood
        Village and at Centennial Airport.
28-29 In 1950...snowfall totaled 6.3 inches at Stapleton
        Airport...but only 3.5 inches over downtown Denver.
      In 1960...heavy snow fell at Stapleton Airport where
        8.6 inches of snow were measured.  North winds gusted to
        38 mph.  Most of the snow...6.9 inches...fell on the 29th.
29    In 1898...apparent thunderstorm winds were sustained from
        the southwest to 58 mph with gusts to 66 mph.
      In 1909...north winds were sustained to 44 mph behind an
        apparent cold front.  These were the strongest measured
        winds of the month that year.
      In 1962...heavy snowfall totaled 6.4 inches at Stapleton
        Airport where northeast winds gusted to only 17 mph.
        Snow fell all day...but the most on the ground was only
        1 inch due to melting.
      In 1991...two men were struck by lightning while golfing in
        Cherry Hills just south of Denver.  The two received only
        minor burns.  Shortly afterward...lightning struck a home in
        Cherry Hills Village several times...leaving numerous holes
        in the roof.  No injuries were reported.
      In 1993...localized strong winds occurred at Jefferson County
        Airport near Broomfield where gusts to 63 mph were recorded.
        The strong winds were the result of a probable microburst.
      In 2000...several severe thunderstorms producing large hail
        and destructive winds rumbled across northern metro Denver.
        Thunderstorm wind gusts reached 81 mph near Hudson with
        hail as large as 3/4 inch in diameter at Longmont.  Several
        homes and vehicles sustained damage.  The strong winds
        uprooted trees and downed utility poles...causing scattered
        outages.  Lightning sparked a house fire in Boulder.  The
        fire damaged a portion of the roof and a bedroom on the
        third floor.  Thunderstorm winds gusted to 53 mph at Denver
        International Airport.
      In 2003...lightning struck a chimney at a residence in Hiwan
        in Evergreen...sending stones flying as far as 150 feet.
        Electrical equipment in some nearby homes also failed.
        Damage to the residence...in addition to electrical
        equipment...was estimated at 100 thousand dollars.
        Severe thunderstorms produced large hail to 1 inch in
        diameter near Hudson and Sedalia and to 3/4 inch near
        Parker.  Hail as large as 1 3/4 inches was measured 9 miles
        north of Sedalia.
      In 2014...high winds occured east of Interstate 25. Peak wind
        gusts included: 71 mph just north of Strasburg; 68 mph at
        Denver International Airport; 62 mph near Elizabeth; 58 mph
        at Front Range Airport in Watkins and 11 miles east of Parker.
29-30 In 1964...several weeks of dry weather and windy conditions
        across the Great Plains to the east caused noticeable
        suspended dust to invade metro Denver.  At Stapleton
        International Airport east winds gusted to 28 mph and
        visibility was reduced to 5 miles.
      In 1989...a late season snowstorm dropped 2 to 4 inches of
        snow across metro Denver with 6 to 12 inches in the
        foothills.  Snowfall totaled 3.9 inches at Stapleton
        International Airport where northeast winds gusted to
        23 mph and the greatest snow depth on the ground was
        2 inches due to melting.
      In 1991...a Pacific storm dumped heavy wet snow across metro
        Denver.  The foothills were hit the hardest where snowfall
        amounts ranged from 16 inches at Evergreen to 5 inches at
        Idaho Springs.  Lower elevations of metro Denver received
        5 to 9 inches of snowfall with 5 inches in Boulder and 7.0
        inches at Stapleton International Airport where northeast
        winds gusted to 25 mph.  The weight of the snow caused
        power lines to fall and tree limbs to snap...producing power
        outages in parts of Denver...Aurora...and Westminster.
      In 1999...heavy snow fell overnight in the foothills above
        7500 feet elevation.  Snowfall totals included:  13 inches
        near Rollinsville...10 inches near Evergreen...8 inches at
        Blackhawk and Nederland...and 7 inches at Conifer.  Only
        rain fell across the city with 2.13 inches recorded at
        Denver International Airport.
29-2  In 1954...a major storm dumped 10.1 inches of snowfall at
        Stapleton Airport.  Most of the snow...7.5 inches...fell on
        the 29th and 30th.  The maximum snow depth on the ground
        was 5 inches on the 30th due to melting.  No strong winds
        accompanied the storm.
30    In 1896...northwest winds were sustained to 55 mph with gusts
        as high as 64 mph in the city.
      In 1960...the minimum temperature dipped to 22 degrees
        at Stapleton Airport.  The sub-freezing cold damaged
        fruit trees and some other crops in the area.
      In 1967...west winds gusted to 51 mph at Stapleton
        International Airport.  Winds were strong and gusty
        across all of metro Denver.
      In 1972...hail 1/2 to 3/4 inches in diameter fell at
        Stapleton International Airport.  Northwest winds gusted
        to 35 mph.
      In 1980...a cold air funnel touched down several times near
        Louisville.
      In 1983...mothball-size hail fell in Wheat Ridge.
      In 1992...the all-time highest recorded temperature in April...
        90 degrees...occurred.  This is also the earliest 90 degree
        reading for the season.  In addition...the temperature
        dipped to a low of only 56 degrees...setting a record high
        minimum for the date.
      In 1995...hail...up to 3/4 inch in diameter...fell at Denver
        International Airport.  The hail was soft...lasted for only
        8 to 10 minutes...and caused no damage.
      In 2002...drought conditions started to have an effect on
        greater metro Denver.  April...normally the third snowiest
        month of the year in Denver averaging just over 9 inches of
        snow...ended with only a trace of snow...ranking the month...
        along with previous Aprils...the 2nd least snowiest on
        record.  The month ended with only 0.23 inch of liquid
        precipitation making the month the 3rd driest on record.
        Mountain snowpack was less than half of normal for this
        time of year.  A statewide drought emergency was declared
        by the Governor.
      In 2003...a small tornado touched down 10 miles east of Hudson...
        but did no damage.  Hail as large as 3/4 inch in diameter
        fell in Aurora near Cherry Creek.
      In 2004...post-frontal upslope flow produced light snowfall
        across metro Denver.  Snowfall was 4.0 inches at Denver
        Stapleton...while the temperature hovered in the lower 30`s
        all day.  The high temperature was only 33 degrees...a
        record low maximum for the date.  The low temperature of
        30 degrees was not a record.  North winds gusted to 20 mph
        at Denver International Airport.
30-1  In 1980...to the west of Denver...heavy rain changing to snow
        buried the foothills above 7 thousand feet in 4 to 8 inches
        of snow.  Precipitation in the foothills ranged from 1 to 3
        inches...which caused some local flooding.  Rain fell at
        lower elevations.  Rainfall at Stapleton International
        Airport totaled 1.05 inches from the storm.

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