Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 300045

Public Information Statement
National Weather Service Denver/Boulder CO
645 PM MDT SAT APR 29 2017

...This week in metro Denver weather history...

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
      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 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 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.
1     In 1902...northwest winds were sustained to 68 mph with
        gusts as high as 74 mph in the city during the early
        morning.  The apparent very strong chinook winds warmed
        the temperature to a high of 78 degrees.
      In 1912...south winds were sustained to 42 mph with gusts
        as high as 58 mph.  South to southwest winds were strong
        all afternoon.
      In 1935...a moderate duststorm blew into the city at around
        2:00 PM on northwest winds sustained to 17 mph with gusts
        to 19 mph.  Later in the afternoon...the dust receded to
        the east in advance of a rainstorm from the west.
      In 1988...very strong winds behind a vigorous cold front
        produced a blinding dust storm that closed I-70 east of
        Denver.  Northeast winds over metro Denver peaked to 45
        mph at Stapleton International Airport...but only kicked
        up some blowing dust.  The temperature plunged from a
        high of 76 degrees at midday to 36 degrees at midnight as
        light rain changed to light snow.
      In 1991...3/4 inch diameter hail fell at Standley Lake in
        northwest metro Denver.
      In 1999...heavy snow developed in the foothills above
        7 thousand feet elevation.  Snow totals included:
        10 inches at Rollinsville...7 inches near Conifer...and
        6 inches atop Crow Hill.  Rain fell across metro Denver.
1-2   In rain changed to light snow overnight...
        but totaled only 2.0 inches.  This was the last snow of
        the season.  Northeast winds were sustained to 45 mph
        with gusts to 48 mph on the 1st.
1-5   In 1898...snowfall totaled 15.5 inches in downtown Denver.
        Most of the snow...6.2 inches...fell on the 3rd.  Most of
        the snow melted as it fell.  The greatest snow depth on
        the ground was only 2.5 inches on the 3rd at 8:00 PM.
        This was the only snowfall during the month.  Northeast
        winds were sustained to 22 mph on the 1st.
2     In 1874...strong winds upset two railroad passenger coaches
        near Georgetown.  The baggage was retrieved and placed in
        a heavy...large wagon.  The passengers then seated
        themselves on top of the baggage.  Another strong gust
        of wind upset the wagon.  The driver`s shoulder was
        dislocated...and a passenger`s leg was badly injured.
        In Denver...northwest winds increased and blew in gusts
        and heavy winds were observed on the ridge tops.  On
        the Kansas Pacific R.R. east of Denver...the wind was so
        strong that it blew the train back several lengths...which
        caused the train to be about 7 hours late arriving in
        the city.
      In 1901...south winds were sustained to 50 mph with gusts to
        60 mph from an apparent thunderstorm with hail.
      In 1944...snowfall of 8.3 inches was accompanied by a
        thunderstorm.  This was the last snowfall of the season
        and the only snow of the month.  Northwest winds were
        sustained to 25 mph.
      In 1955...southwest winds at speeds of 37 mph with gusts as
        high as 58 mph caused some blowing dust at Stapleton
      In 1983...1 inch diameter hail fell a few miles south of
      In 1984...3/4 inch diameter hail fell in Northglenn.
      In 1988...I-70 east of Denver was closed for the second
        straight day...this time due to snow and blowing snow
        producing up to 2 foot drifts.  While only 2 to 4 inches
        of snow fell across metro Denver...Strasburg...just east of
        Denver...received a foot of snow.  North winds peaked to
        51 mph at Stapleton International Airport where snowfall
        totaled only 1.3 inches.
      In 1995...lightning struck a house in Westminster sparking an
        attic fire.
2-3   In 1979...heavy rain changed to snow on the 2nd.  Snowfall
        totaled 3.9 inches at Stapleton International Airport...
        where northwest winds gusted to 26 mph.  The greatest
        depth of snow on the ground was only 1 inch at midday on
        the 2nd due to melting.  Total precipitation for the 2
        days was 1.65 inches.
2-4   In 1987...a slow moving storm brought rain...wind...and snow
        to metro Denver.  Rainfall totaled 1.04 inches at
        Stapleton International Airport where north winds gusted
        to 48 mph on the 3rd.  The foothills received 5 to 10 inches
        of snow.
2-5   In 2001...a very slow moving Pacific storm system became parked
        near the Four Corners region...which allowed heavy snow to
        develop above 6500 feet in the foothills with a mix of rain
        and snow over lower elevations of metro Denver.  Snowfall
        totals included:  21 inches atop Crow Hill and at Idaho
        Springs; 19 inches near Blackhawk; and 18 inches in Coal
        Creek Canyon...Genesee...and 11 miles southwest of Morrison.
        Snowfall totaled 6.2 inches at the site of the former
        Stapleton International Airport.  Precipitation (rain and
        melted snow) totaled 2.09 inches at Denver International
        Airport where north winds gusted to 30 mph on the 2nd.
3     In 1898...heavy snowfall of 6.2 inches fell over downtown
        Denver.  Most of the snow melted as it fell.  The greatest
        snow depth on the ground was 2.5 inches during the evening.
      In 1907...the all-time lowest recorded temperature in the
        month of May...19 degrees...occurred.
      In apparent microburst produced sustained northeast
        winds to 44 mph with gusts to 52 mph.  Rainfall was only
        0.01 inch in downtown Denver.
      In 1981...lightning struck 9 golfers at the South Suburban
        Golf Course.  None were injured seriously.
      In 1983...hail 1 1/2 inches in diameter fell at Green
        Mountain west of Lakewood...with 3/4 inch stones reported
        in Lakewood.
      In 1986...a thunderstorm wind gust to 51 mph was recorded at
        Stapleton International Airport.
3-5   In 1908...rain changed to snow on the evening of the 3rd
        and continued through the early evening of the 5th.
        Snowfall totaled 10.0 inches over downtown Denver.
        This was the last measurable snow of the season.
        Precipitation totaled 1.51 inches.  North winds were
        sustained to 23 mph on the 3rd...33 mph on the 4th...and
        21 mph on the 5th.  Three temperature records were set.
        High temperatures of 30 degrees on the 4th and 38 degrees
        on the 5th were record low maximum temperatures for the
        dates.  The reading on the 4th was also the all-time
        record low maximum for the month of May.
      In 2007...a slow moving Pacific storm system...from the
        Desert Southwest...brought a period of unsettled weather
        to the region.  During the 3-day period...locally heavy
        snow was reported over parts of the Front Range Foothills.
        Storm totals included:  15 inches near Conifer...14.5
        inches west of Jamestown...13.5 inches; 6 miles southwest
        of Evergreen...and 12.5 inches at Pine Junction.  Severe
        thunderstorms...producing large hail...up to one inch in
        diameter were observed in the vicinity of Boulder and
        Hudson.  Lightning struck a residence in Jefferson County.
        The roof was hit...causing the attic to catch fire.
        At Denver International Airport...lightning struck a
        United Airlines jet as it was pushing away from
        the gate.  The passengers were taken off the jet and put
        on another plane.
4     In 1893...northwest winds were sustained to 42 mph.
      In 1971...a funnel cloud was sighted 10 miles southwest
        of Boulder.  Hail stones to 1 inch in diameter fell in
        southeast Denver...but caused only minor damage.
      In 2006...a severe thunderstorm produced hail to 1.00 inch
        in diameter in Aurora near Cherry Creek Reservoir.
      In 2010...high winds downed trees and power lines across
        parts of the Front Range Foothills and Urban Corridor.
        Downed power lines sparked a 12-acre wildfire near
        Conifer.  In Boulder...Longmont and Louisville...the wind
        damaged roofs and broke windows and skylights.  Peak
        wind gusts included:  75 mph in northwest Longmont...71 mph
        at the National Wind Technology Center and 4 miles south-
        southwest of Superior...61 mph at Broomfield and 56 mph in
        Erie.  At Denver International Airport...a peak wind gust
        to 46 mph was observed.
4-5   In 1986...high winds buffeted the foothills.  Wind speeds of
        60 to 75 mph were recorded in Boulder.  At Stapleton
        International Airport...west winds gusted to 45 mph on the
        4th and to 40 mph on the 5th.
      In 2000...a brief warm spell resulted in setting two daily
        high temperature records.  The temperature climbed to
        highs of 87 degrees on the 4th and 89 degrees on the 5th.
4-8   In 1969...heavy rains caused flooding on Boulder Creek
        in Boulder...which resulted in one death on the 7th.
        Flooding also occurred on Bear Creek in Sheridan and
        on the South Platte River in Denver.  Rain over most
        of the eastern foothills started late on the 4th and
        continued with only brief interruptions in many areas
        until the morning of the 8th.  Very high rates of
        rainfall occurred on the 6th and 7th with the greatest
        intensities in a band along the foothills from about 25
        miles southwest of Denver northward to Estes Park.  Storm
        totals by both official and unofficial measurements
        exceeded 10 inches over much of this area and were over 12
        inches in some localities.  Heavy snow fell in the higher
        mountains and in the foothills later in the period.  The
        saturation of the soil resulted in numerous rock and land
        slides...and the heavy run-off caused severe damage along
        many streams and flooding on the South Platte River.  Many
        foothill communities were isolated as highways were blocked
        and communications disrupted.  Roads were severely damaged
        over a wide area...and a large number of bridges washed out.
        Many roads were closed due to the danger from falling
        rocks.  A building in Georgetown collapsed from the weight
        of heavy wet snow.  In Boulder...a man drowned when caught
        by the flooding waters of Boulder Creek...and a patrolman was
        injured.  Rainfall totaled 7.60 inches in Boulder with
        9.34 inches recorded at the Public Service Company electric
        plant in Boulder Canyon.  In Morrison...rainfall totaled
        11.27 inches in 4 days.  Heavy rainfall totaled 4.68 inches
        at Stapleton International Airport over 3 days from the 5th
        through the 7th.  Rainfall of 3.14 inches was recorded in 24
        hours on the 6th and 7th.  Downstream flooding continued
        along the South Platte River until the 12th when the flood
        crest reached the Nebraska line.
5     In 1903...apparent post-frontal northeast winds were sustained
        to 48 mph with gusts to 60 mph.
      In 1950...a northwest wind gust to 52 mph was recorded at
        Stapleton Airport.
      In 1969...a funnel cloud was observed for 2 to 3 minutes just
        north of Parker.  Two other funnel clouds were sighted in
        the same area.  The public sighted a tornado 15 miles
        east of Stapleton International Airport.  No damage was
      In 2012...severe thunderstorms produced damaging hail ranging
        in size from quarters to golfballs in metro Denver
        including:  Aurora...Centenniel...Cherry Creek...Englewood...
        and southeast Denver. Aurora was hit the hardest...with
        extensive property damage reported to homes and automobiles.
5-6   In 1907...rain changed to snow on the 5th...continued through
        the night...and totaled 3.50 inches.  Northeast winds were
        sustained to 15 mph on the 5th.
      In rain changed to heavy snow and totaled
        12.5 inches over downtown Denver.  Most of the snow...
        12.0 inches...fell on the 5th and this was the greatest
        24-hour snowfall ever measured during the month of May.
        This was also the only measurable snow of the month that
        year.  Low temperatures of 27 degrees on the 5th and 23
        degrees on the 6th were record minimums for the dates.
        High temperatures on both days were in the lower 40`s.
        Southeast winds were sustained to 24 mph with an extreme
        velocity to 26 mph.
      In 1964...high winds gusted to 54 mph in Boulder and to 80 mph
        at Jefferson County Airport near Broomfield.  Wind gusts of
        50 to 60 mph were common over all of eastern Colorado.
        Buildings...power lines...trees...and vehicles were damaged by
        the wind.   South-southwest wind gusts to 54 mph caused some
        blowing dust at Stapleton International Airport where the
        visibility was briefly reduced to 2 miles.
      In 1973...a heavy driving rain storm with embedded
        thunderstorms...produced 1 to 5 inches of rain and caused
        local flash flooding along the east slopes of the Front
        Range.  The greatest flash flooding occurred in metro
        Denver where rainfall totaled 3.56 inches at Stapleton
        International Airport.  Flooding in metro Denver occurred
        on Clear Creek and the South Platte River...already swollen
        from heavy snowmelt.  Numerous basements were flooded...
        roads and streets were washed out...a bridge was demolished...
        and miscellaneous other damage was reported.  North winds
        gusted to 39 mph at Stapleton International Airport during
        the storm.  The storm produced major downstream flooding
        along the South Platte River all the way to the Nebraska
        border during the next two weeks.  One person died and
        total damage was estimated at around 120 million dollars.
      In 1978...heavy wet snow of around 24 inches collapsed an
        office and hotel building in Boulder.  Many cars were
        abandoned in the city.  Denver received 14 inches of
        heavy wet snow with Evergreen and Golden reporting 12
        inches.  Snowfall totaled 12.4 inches at Stapleton
        International Airport with a total accumulation of snow
        on the ground of 8 inches due to melting.  Southeast winds
        gusted to 23 mph on the 5th.  Temperatures both days
        remained in the lower to mid 30`s.
6     In 1876...heavy snow fell during the night and ended during
        the morning...but no amount was recorded.  Light hail fell
        briefly during the late afternoon.  Precipitation for the
        day totaled 1.05 inch which would give an estimated snowfall
        of nearly 11 inches had all of the precipitation been snow.
      In 1889...northwest winds were sustained to 45 mph in the city.
      In 1893...heavy snow of 8.9 inches fell over downtown Denver.
        Once on the ground...the snow melted rapidly.  This was the
        only snow of the month.  Northwest winds were sustained to
        20 mph.
      In 1904...west winds were sustained to 45 mph with an extreme
        velocity to 46 mph.
      In apparent dry microburst produced sustained north
        winds to 44 mph with gusts as high as 50 mph.
      In 1920...a thunderstorm produced hail and 0.55 inch of rain.
        The hail of unknown size covered the ground.
      In 1921...thunderstorm winds were sustained to 42 mph with
        gusts to 44 mph.  Rainfall was only 0.17 inch.
      In 1936...a light to moderate duststorm moved in from the
        east on southeast winds and lasted most of the day.  The
        dust reduced the visibility to two miles at times.  Winds
        from the northwest sustained to 21 mph swept the dust out
        of the city during the late afternoon.
      In 1966...a funnel cloud was sighted for 7 minutes to the
        southwest of Stapleton International Airport.  The funnel
        appeared to be picking up dust from the ground...but was
        too distant to tell.  No damage was reported.
      In 1968...a thunderstorm wind gust to 53 mph was recorded at
        Stapleton International Airport.
      In 1988...high winds raked the state.  Wind gusts ranged from
        60 to 80 mph in Boulder...Aurora...and at Centennial Airport.
        South-southwest winds to 53 mph were recorded at Stapleton
        International Airport.  Across metro Denver...the strong
        winds knocked windows out of buildings...downed power poles
        and wires and some fences...unroofed several buildings...and
        damaged signs.
      In 1997...strong winds from a dry microburst blew an empty
        18-wheeler on its side in the northbound lane of I-25
        north of Denver near the Brighton exit.  There were no
        injuries.  West winds gusted to 46 mph at Denver
        International Airport.
6-7   In 1873...snowfall totaled 8.9 inches in downtown Denver.
        Most of the snow fell on the 6th.

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