Public Information Statement
Issued by NWS Denver/Boulder, CO

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

000
NOUS45 KBOU 230045
PNSBOU
COZ030>051-232300-

Public Information Statement
National Weather Service Denver/Boulder CO
645 PM MDT SAT JUL 22 2017

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

7-25  In 1934...a streak of 15 consecutive days of 90 degrees
        ranked 5th on the list of hot streaks.  The record of
        24 consecutive days was established in the summer of
        2008.
13-5  In 2008...a streak of 24 consecutive days of 90 degrees
        shattered the previous record of 18 consecutive days
        established in 1901 and 1874.   Ironically...no new single
        day record high temperatures were set in the month of July.
        In August however...a record of 104 degrees was set on the
        1st...and another record of 103 degrees was set on the 2nd.
        In addition...a record low min of 70 degrees was set on
        August 2nd.
18-2  In 1987...a streak of 16 consecutive days of 90 degrees
        ranked 4th on the list of hot streaks.  The record of
        24 consecutive days was established in the summer of
        2008.
19-23 In 2005...the high temperature climbed above 100 degrees on
        each of the 5 days with readings of 101 on the 19th...105 on
        the 20th...104 on the 21st...and 102 on both the 22nd and 23rd.
        A new record maximum temperature for the month of July of 105
        degrees was set on the 20th...which also equaled the all time
        record maximum for Denver of 105 degrees first set on August
        8th in 1878.  Daily maximum temperature records were set on
        each day...and the 5 day period equaled the record for the
        most consecutive days of 100 degrees or more first set from
        July 4th through 8th in 1989.  The intense heat resulted in
        a high use of electricity for cooling purposes.  The demand
        for electric power exceeded the supply and rolling black-outs...
        each lasting about an hour...were scheduled across metro Denver
        during the afternoons and early evenings.
20-23 In 1961...unusually cool weather for July resulted in several
        temperature records.  Record minimum temperatures were
        set or equaled on each day with readings of 51...51...49...
        and 49 degrees.  High temperature of only 64 degrees on the
        21st was a record low maximum for the date.
20-25 In 1965...heavy showers and thunderstorms doused metro Denver
        with significant rain each day.  Rainfall for the six days
        totaled 5.16 inches at Stapleton International Airport.
        Massive rainfall occurred on the 20th...21st...and 25th...
        flooding streets and basements and causing streams to
        overflow.  The heaviest rainfall...2.05 inches...at Stapleton
        International Airport occurred on the 25th.
22-23 In 1991...heavy rains over the Palmer Divide and along the
        Front Range caused the South Platte River to flood from
        near Henderson to Fort Lupton.  The river was out of its
        banks at several locations with water covering the roads
        through the night.  Only minor damage was reported.
23    In 1901...the temperature climbed to a high of 90 degrees...
        marking the 18th consecutive day with a high temperature
        of 90 degrees or more.  This equaled the record of 18
        consecutive days set from July 1st through July 18th in
        1874.
      In 1910...the temperature climbed to a high of 101 degrees
        in downtown Denver.
      In 1936...the high temperature reached 100 degrees in
        downtown Denver.
      In 1957...a tornado was observed by National Weather Service
        personnel 25 miles east-northeast of Stapleton Airport for
        7 minutes.  No property damage or injuries were reported.
        The public reported a funnel cloud 10 miles northeast of
        Brighton.
      In 1960...lightning struck many locations across metro Denver.
        A Boy Scout leader was struck and injured at the Rocky
        Mountain Arsenal.  Some sections of Arvada were blanketed
        with a white layer of hailstones.  A number of weed fires
        were started by lightning.  Some houses were struck...but no
        serious damage occurred.  Heavy rain fell from northwest
        Denver to Brighton with up to 1.50 inches in some areas.
      In 1965...heavy rain flooded and damaged homes in Georgetown...
        where the sewer system was damaged and the water supply
        contaminated.  Heavy rains in Aurora washed out earthen
        bridges over Sand Creek.  Streets were flooded in Denver.
        Several highways were washed out to the east and southeast
        of Denver.
      In 1975...heavy rains caused flash flooding in the foothills
        west of Denver.  Several roads and businesses were damaged
        in the Central City and Blackhawk areas.
      In 1983...heavy thunderstorms blasted Denver and areas to the
        south.  Douglas county was hardest hit.  Golf ball size hail
        fell in and near Parker.  Many homes at the Pinery south of
        Parker had windows broken and paint stripped by the storm
        with some vehicles dented by the large stones.  In Parker...
        1.90 inches of rain fell in just 30 minutes.  Many roads in
        Douglas County were washed out...and at least one bridge was
        damaged.  Up to 2 inches of rain fell in Lakewood...and
        Littleton was drenched by 1.60 inches in 15 minutes.  A
        department store in Lakewood suffered water damage when a
        pipe handling runoff broke...sending 4 inches of water onto
        the floor of the store.
      In 1990...a thunderstorm wind gust to 53 mph was recorded at
        Stapleton International Airport...where 1/8 inch diameter
        hail fell.
      In 1992...heavy thunderstorm rains caused Howard Gulch in
        southeast Denver to flow over its banks.  A weather spotter
        recorded thunderstorm wind gusts to 63 mph in Aurora.
        Another spotter measured a wind gust to 60 mph...which
        toppled a large tree.  Thunderstorm winds gusted to only
        41 mph at Stapleton International Airport.
      In 1996...hail...as large as an inch in diameter...fell 5 miles
        west of Castle Rock.
      In 1997...damaging thunderstorm winds associated with a wet
        microburst ripped the roof off a barn near Brighton...
        causing the east side of the structure to collapse.  The
        roof of a nearby utility shed was also lifted off and blown
        60 feet away.  West winds gusted to 38 mph at Denver
        International Airport.
      In 2001...a severe thunderstorm pelted Littleton with hail as
        large as 1 1/2 inches.  Total damage to vehicles...roofs...
        buildings...and landscaping totaled over 600 thousand
        dollars.  Rain leaked into offices...damaging computers.
        Almost every vehicle parked in the Littleton Center lot
        sustained some hail damage.  Thunderstorm winds gusted to
        55 mph at Denver International Airport.
      In 2002...a small tornado briefly touched down near Bennett.
        No damage was reported.
      In 2004...heavy thunderstorm rainfall in the Overland fire
        burn area caused flash flooding in Jamestown.  Up to a foot
        of water reportedly covered the highway near Jamestown.
        Many of the town`s culverts filled with dirt and debris...
        causing the overflow to wash onto streets and into homes.
        Heavy machinery had to be used to remove piles of mud
        up to 7 feet deep.  Parked cars slid down the street
        with the mud and water...and many had to be dug out.  The
        fire station in Jamestown was inundated with 10 inches of
        muddy water.  Heavy thunderstorm rainfall caused street
        flooding in Federal Heights and Thornton.  Several streets
        were inundated with 2 to 4 feet of water...including 84th
        Avenue and Grant Street...Conifer Street and Huron Blvd....
        102nd Ave. and Melody...as well as 83rd Ave. and Washington.
        Several cars were stranded in the flood waters.  Heavy
        rainfall also caused street flooding in parts of Westminster.
        Water reportedly flowed into car windows just north of 104th
        Avenue and U.S. Highway 36.  Sections of two roads had
        to be closed due to flooding.  Heavy thunderstorm rainfall
        of up to 2 inches in 45 minutes caused flash flooding just
        east of Aurora.  Floodwaters ranging from 2 to 3 feet deep
        forced the closure of Powhaten...Gun Club and Picadilly Roads.
        Lightning caused power outages in parts of Arvada.  About
        9800 customers were without power for up to 90 minutes.
24    In 1896...heavy cloudbursts in the foothills west of Denver
        caused flash flooding on Bear Creek...Clear Creek...Golden
        Gate Gulch...and Mount Vernon Creek...resulting in a total of
        27 deaths.  The downpour dislodged large boulders...one of
        which crushed a house.  The heavy rain also caused a dam on
        Cub Creek to wash out...adding even more water to the flood.
        A wall of water as high as 10 feet flooded Evergreen and
        passed down Bear Creek...washing away many structures along
        the way.  The flood crest produced 3 feet of water in
        downtown Morrison during the early evening.  Flash flooding
        on Mount Vernon Creek added to the flooding in Morrison.
        In Golden...the flooding washed out bridges on Clear Creek
        and on Cresman and Tucker Gulches and forced the closure of
        the power plant.  In Denver...a thunderstorm produced hail
        of unknown size during the afternoon and rainfall of 1.23
        inches overnight.
      In 1958...a thunderstorm wind gust to 52 mph was recorded at
        Stapleton Airport.
      In 1965...heavy rain caused flooding on Clear Creek and Tucker
        Gulch in Golden and west Denver.  Damage in Golden was
        estimated at 80 thousand dollars.  Heavy rain south of
        Denver washed out temporary earthen bridges constructed
        following the June floods in Castle Rock...Littleton...
        Englewood...and Denver.  Bear Creek in south Denver reached
        flood stage.  A cloudburst on Cub Creek in Evergreen washed
        out bridges and roads.  Heavy rain fell over all the Denver
        and Aurora areas...causing some flooding of roads...streets...
        and bridges.  A man drowned in a flooded irrigation canal
        near Hudson.  Heavy rain caused flooding of streets and
        roads in Blackhawk and Central City.  Hail caused minor
        damage in Idaho Springs.
      In 1967...seven bridges were washed out along a normally dry
        creek bed south of State Highway 7 west of Brighton.  One
        car was washed into the creek when a bridge gave way.
      In 1970...hail stones to 1 1/4 inches in diameter fell in the
        foothills of Jefferson County southwest of Denver.
      In 1971...golf ball size hail was reported in foothill areas
        of Jefferson County west of Denver.  A funnel cloud was
        sighted in Aurora.  Wind gusts estimated at 60 mph...hail...
        and heavy rain up to an inch in 15 minutes caused local
        flooding and some other damage in several areas of metro
        Denver.  Hailstones to 3/4 inch in diameter fell 7 miles
        southeast of Denver.
      In 1973...a thunderstorm wind gust to 52 mph was recorded
        at Stapleton International Airport where one inch diameter
        hail was measured.
      In 1981...strong winds downed a power line in northeast Denver.
        Wind gusts to 50 mph were recorded at Chatfield Reservoir.
      In 1987...3/4 inch diameter hail fell 5 miles northeast of
        Commerce City.
      In 1996...hail...up to 1 3/4 inches in diameter...fell at
        Chatfield Reservoir.  Hail to 3/4 inch in diameter was
        measured near Bennett.
      In 2000...lightning struck near two golfers at Ute Creek Golf
        Course near Longmont...knocking them to the ground.  The
        men received only minor injuries.
      In 2001...lightning from a thunderstorm knocked out electrical
        power to about 1500 residents in the City of Denver.
      In 2004...a chilly day with fog and thunderstorms resulted in
        two temperature records.  The low temperature of 49 degrees
        was a record minimum for the date.  The high temperature of
        only 58 degrees was a record low maximum for the date.
24-25 In 2003...maximum temperature of 100 degrees on the 24th was a
        record high for the date.  Low temperature of 73 degrees
        on the 25th was a record high minimum for the date.
25    In 1875...brief heavy rain and hail lasted only 5 minutes...
        but the 1/4 inch diameter hail covered the ground to a
        depth of 1/2 inch and made the streets look like there
        had been snowfall.  There was much crop damage...especially
        to corn...and some sheep were killed.  Precipitation totaled
        0.51 inch in the city.
      In 1896...a heavy thunderstorm produced sustained northwest
        winds to 45 mph with gusts to 50 mph and 1.02 inches of
        rain.
      In 1965...a cloudburst dumped 1.99 inches of rain in 30
        minutes at Stapleton International Airport.  The storm was
        accompanied by strong winds gusting to 70 mph.  The heavy
        rain flooded numerous streets in east Denver and Aurora.
        One inch diameter hail accompanied a cloudburst...9 miles
        southwest of Denver.  A funnel cloud was sighted 25 miles
        northwest of Denver.  In Aurora...there were unofficial
        reports of 2.30 inches of rain in 40 minutes and 3.30
        inches of rain in 30 to 40 minutes.  Rainfall totaled 2.05
        inches at Stapleton International Airport.  Rainfall of
        2.42 inches for 24 hours on the 24th and 25th was the
        second greatest on record for July.
      In 1977...a tornado touched down briefly in Aurora southeast
        of Cherry Creek Reservoir.  No damage was reported.
        A funnel cloud was sighted for 4 minutes by National
        Weather Service personnel 10 miles north of Stapleton
        International Airport near Henderson.
      In 1991...heavy rain...up to half an inch in 10 minutes...caused
        flooding in Westminster...Northglenn...and north Denver where
        a section of railroad track was washed away.  At Stapleton
        International Airport...heavy thunderstorm rain totaled 1.85
        inches and briefly reduced the visibility to 1/4 mile.
        Hail to 1/8 inch in diameter was also measured.  A tornado
        touched down briefly near Fort Lupton.  No damage was
        reported.
      In 1998...heavy monsoonal thunderstorm rains caused flooding
        and flash flooding in eastern and southern sections of
        metro Denver...including Englewood and Aurora...when about 2
        to 3 inches of rain inundated the area.  Both I-25 and I-70
        were closed for 2 to 3 hours as several low lying areas
        became impassable due to the high waters.  The water was
        estimated to be 15 feet deep in one flooded underpass along
        I-25.  As a result...the freeway was closed from south of
        6th Avenue to University Blvd.  Standing water forced the
        closure of I-70 at Gun Club Road east of Denver.  In
        Englewood...U.S. Highway 285 was closed...when high water
        made it impassable.  Several cars were reportedly floating
        down the roadway near Sheridan Blvd.  In Aurora...the
        intersection at Yale Ave. and Chambers Rd. was flooded by
        high water up to 4 feet deep when a spillway on the High
        Line Canal was breached.  Lightning also knocked out 11
        transformers across metro Denver...causing several small
        fires and scattered power outages.  Flood and flash
        flooding also occurred north of Strasburg when as much
        as 2.51 inches of rain fell in an hour.  The deluge
        resulted in considerable flooding of local streets and
        county roads.  Torrential rainfall of 2 to 3 inches in
        less than an hour triggered a flash flood in Virginia
        Canyon.  County Road 279 between Idaho Springs and
        Central City was closed for two days to clear debris
        from mudslides.  Several cars in Idaho Springs were
        washed off the road...and numerous basements were flooded
        in town.  Thunderstorm rainfall totaled 2.69 inches at
        Denver International Airport.
      In 2001...lightning struck two homes in Lafayette...damaging
        the roof and attic of one and shorting out the electrical
        system in another.  Hail to 1 3/4 inch in diameter was
        measured 7 miles north of Castle Rock with 3/4 inch hail
        7 miles north of Sedalia.
      In 2005...heavy thunderstorm rain in the vicinity of the
        Overland Wildfire burn scar triggered a mudslide in
        Jamestown.  Rocks the size of bowling balls...along with
        silt and mud slid down the mountain into the town.  No one
        was injured.  One parked car was buried by the debris.
      In 2006...heavy thunderstorm rainfall caused flash flooding
        1 mile north of the town of Westcreek in southwestern
        Douglas County.  Several maintenance roads were washed out
        by the floodwaters.
26    In 1891...a thunderstorm produced sustained northeast winds
        to 44 mph with gusts to 60 mph and 0.16 inch of rain.
      In 1894...a thunderstorm produced sustained southwest winds
        to 36 mph with gusts to 58 mph...but only 0.04 inch of rain.
      In 1910...the high temperature reached 100 degrees in
        downtown Denver.
      In 1959...a Denver man was stunned while standing by a car
        that was struck by lightning.  He was treated for burns and
        shock at a local hospital.  Thunderstorm winds gusted to 55
        mph at Stapleton Airport.
      In 1983...two heavy thunderstorms hit the northern and western
        suburbs.  The first drenched Northglenn with an inch of rain
        in 30 minutes.  The second storm dumped an inch or more of
        rain in Idaho Springs and Evergreen.  The heaviest rainfall...
        2.90 inches in an hour...caused minor street flooding in
        Golden.
      In 1984...heavy early morning thunderstorms drenched the
        foothills southwest of Denver.  Rainfall to 1 1/2 inches in
        just 30 minutes occurred between Evergreen and Conifer.  In
        nearby Turkey Creek Canyon...1.80 inches of rain was recorded
        in 35 minutes.
      In 1985...a long rope-like white tornado touched down 5 miles
        east of Erie and stayed on the ground...mainly over an open
        field...for 18 minutes.  However...the twister damaged a few
        cars on I-25 and injured 3 people from broken glass.  The
        storm flipped over a van...blew out car windows...and ripped
        a highway sign.  It also blew an outbuilding off its
        foundation.  A tornado also touched down briefly 8 miles
        north of Bennett.  No damage was reported from this storm.
      In 1988...a 9-year-old girl was slightly injured by lightning
        in Parker.
      In 2003...a severe thunderstorm in and south of Franktown
        produced hail as large as 1.75 inches in diameter.
26-27 In 1885...heavy cloudbursts on the Palmer Divide south of
        Denver caused flooding on Cherry Creek in the city
        overnight.  The high water washed away street and railroad
        bridges and a few houses.  The flood waters completely
        inundated the rail yards in lower downtown.  This was the
        worst flood on Cherry Creek since May 19-20...1864...but the
        damage was mitigated by stream improvements and fewer
        structures near the channel.  There was also no simultaneous
        flood on the South Platte River to slow the flow of water
        through the city.  Rainfall in the city was only 0.08 inch
        on the 26th.
27    In 1897...an apparent dry microburst produced sustained west
        winds to 48 mph with gusts to 60 mph and a trace of rain.
      In 1901...a thunderstorm produced north winds to 38 mph with
        gusts to 41 mph and rainfall of only 0.01 inch in downtown
        Denver.  This was the only measurable rainfall of the month...
        making this the driest July on record.
      In 1953...an unconfirmed tornado in south Lakewood touched down
        briefly and abruptly dissipated.  No damage was reported
        from the twister.
      In 1955...the public sighted a funnel cloud estimated at 500
        feet above the ground near the western edge of Lowry Field.
        Wind estimates up to 60 mph were reported in the vicinity.
      In 1956...a severe thunderstorm produced 3/4 inch diameter hail
        and wind gusts to 48 mph at Stapleton Airport where rain
        fall totaled 1.08 inches.
      In 1965...a tornado was sighted 21 miles south of Denver in
        Douglas County.  No damage was reported.
      In 1977...a thunderstorm wind gust to 51 mph was recorded
        at Stapleton International Airport.  A funnel cloud was
        sighted by an aircraft east of Parker.
      In 1982...heavy rain doused Boulder with 1 1/2 to 3 inches of
        rain over a short period of time...causing extensive street
        flooding.
      In 1984...strong thunderstorms drenched several areas.
        Rainfall of 1.04 inches occurred in just 20 minutes at
        Boulder.  Downpours also hit Aurora and northeast Denver...
        delaying flights at Stapleton International Airport for an
        hour.  Up to 3/4 inch of rain fell in central Aurora in 15
        minutes.
      In 1989...lightning hit a home in Littleton...setting a bed on
        fire.  Damage was confined to the bedroom.
      In 1994...lightning struck a furniture store in Boulder...
        igniting a fire which caused major damage to the building
        and contents.
      In 1997...lightning sparked a fire...causing extensive damage
        to a home in Watkins.  Heavy rain caused Lena Gulch to
        surge 2 feet over its banks in Golden.  The fire department
        had to rescue a man when his van stalled in high waters.
        High waters from swollen creeks and streams washed out
        bridges and several sections of road in southeast Aurora.
        A 200-to-300 foot section of road was washed away where
        Picadilly Street dips across Coal Creek.  Three youths
        had to be rescued when they became stranded by rapidly
        rising water in another normally dry creek bed.
      In 1999...lightning was suspected of igniting a fire which
        caused substantial damage to a farm in Hudson.  The blaze
        destroyed a 10-foot by 60-foot metal pole barn...a pick-up
        truck...a SUV...a boat and trailer...3 four wheeler vehicles...
        and other farm equipment.
      In 2007...a man was struck and killed by lightning while
        jogging at Matthews Winters Park in Morrison.
27-31 In 1956...96 percent of the total precipitation for the month
        of July occurred over the last five days of the month.
        Heavy thunderstorms produced 4.00 inches of rainfall at
        Stapleton Airport.  This amount of precipitation in 5 days
        or less had been exceeded only 3 times in previous record.
        The last time had been in December of 1913 as snow.
        Considerable property damage occurred across metro Denver
        from flooding.
28    In 1882...intense thunderstorm lightning struck a number of
        places in the city...but no significant damage was reported.
      In 1910...heavy thunderstorm rainfall totaled 2.21 inches in
        downtown Denver.  Rainfall was 1.11 inches in an hour during
        the early afternoon.
      In 1922...heavy rainfall to the south of Denver caused Cherry
        Creek to rise to the top of the retaining walls in the city.
        The creek did not flood; however...the large volume of water
        discharged into the South Platte River did inundate a few
        blocks of Globeville.  Flooding also occurred along Bayou
        Creek near Franktown to the south of the city.
      In 1923...thunderstorm winds were sustained to 38 mph with
        gusts to 52 mph.
      In 1957...iridescent cirrocumulus clouds of unusual formation
        and brilliant color...oriented from southwest to northeast
        over metro Denver...were sighted by U.S. Weather Bureau
        observers at Stapleton Airport shortly after noon.
      In 1966...heavy rains from a severe thunderstorm caused flash
        flooding on Deer Creek...southwest of Littleton.  A child was
        injured when washed from a car caught in the flood waters.
        The flooding damaged property along the creek.  Strong winds
        damaged several houses in suburban Littleton.
      In 1970...a microburst wind gust to 52 mph was recorded at
        Stapleton International Airport.
      In 1974...a tornado was sighted just east of Buckley Field in
        Aurora.  No damage was reported.
      In 1982...up to 2.50 inches of rain drenched an area just
        southwest of Denver in 30 minutes.  This was the second day
        of heavy rain across portions of metro Denver.
      In 1984...1.25 inches of rain fell in 45 minutes in Arvada.
        Minor flooding occurred on Bear Creek after a small dam
        broke.
      In 1989...lightning killed two men in Arvada.  They were taking
        wash from a clothesline when a bolt hit the older man...39...
        killing him instantly.  The bolt then traveled along the
        line...which was stretched between 2 tall trees...and hit his
        26-year-old brother who died the next day.
      In 1996...several weak tornadoes developed along a thunderstorm
        outflow boundary that moved into southern Weld...northern
        Jefferson...and Adams counties.  The tornadoes sighted near
        Bennett...Barr Lake...and in Arvada caused little damage.
        Strong thunderstorm winds downed several trees in the City
        of Denver and toppled several trees 7 miles west of Arvada
        where shingles were blown off several houses.  Thunderstorm
        wind gusts reached 58 mph in Broomfield.
      In 1997...a weak tornado touched down briefly in Parker...
        damaging a greenhouse.  Twenty pieces of the fiberglass
        roof were ripped away.  Heavy rainfall in the foothills
        washed out some culverts in the Pine and Conifer areas.
        Heavy rainfall spread over the plains with 4 to 7 inches
        reportedly falling near Hudson.  Several county roads
        were washed out between Fort Lupton and Hudson.  Several
        basements in the area were flooded up to the ceiling.
        Standing water...up to 3 feet deep...was reported in some
        backyards.  Later in the evening...a flash flood killed
        5 people and injured 40 others in two mobile home parks
        in Fort Collins.  The torrential rainfall also caused
        extensive damage on the Colorado State University campus.
        Thunderstorm rainfall totaled 0.80 inch at Denver
        International Airport and 1.09 inches at the site of
        the former Stapleton International Airport.
      In 1999...heavy rainfall...up to 3 inches an hour...triggered
        a massive rock and mudslide along I-70 near Bakerville.
        The slide area was about 200 feet wide and 20 feet deep.
        Several other smaller slides were also reported along
        the highway.  As a result...I-70 was closed for nearly
        25 hours in both directions until the debris could be
        cleared from the roadway.  The blockage of I-70 was one
        of the longest in the history of the highway in Colorado.
        A severe thunderstorm produced a wind gust to 64 mph at
        Denver International Airport.  The storm also produced
        1.56 inches of rain and briefly reduced the visibility
        to 1/4 mile.
      In 2004...a severe thunderstorm produced hail as large as
        1 inch in diameter in Thornton.
      In 2010...a wet microburst produced very heavy rain and
        torrential hail in Boulder County...in the vicinities of
        Caribou...Nederland and Eldora.  Flash flooding washed
        out sections of County Roads 126 and 128 near Caribou.
        Several large boulders had fallen across the roadways.
        Considerable flooding was reported in Nederland.
        Water was also observed running across County Road
        130...between Eldora and Nederland.  The hail had
        accumulated up to 8 inches deep near Eldora.  Several
        vehicles were stuck in the ice...forcing the temporary
        closure of CR130 and the Lake Eldora Ski Road until
        snowplows could clear away the hail. Lightning strikes
        caused minor damage to two local businesses in
        Nederland.  At Denver International Airport...a
        thunderstorm produced 0.30 inches of rain along with a
        peak wind gust to 38 mph.
      In 2012...a tornado touched down briefly at the southeast
        corner of Mt. Evans near Lincoln Lake. The estimated
        elevation where this tornado touched down was near
        12500 feet. This would make this tornado one of the
        highest ever observed in the U.S.
      In 2014...two weak landspouts touched down; one near Ft.
        Lupton and the other on the southwest side of the
        Rocky Mountain Arsenal Wildlife Refuge.  No damage was
        reported.  A strong thunderstorm wind capsized a boat
        in Barr Lake.  All three occupants made it to shore
        with no injuries.
28-30 In 1889...dense smoke from forest fires in the mountains
        obscured the sun over the city for three days.
      In 1971...a vigorous cold front late on the 28th produced
        northeast wind gusts to 39 mph and record breaking cold
        temperatures on the 29th and 30th.  The temperature dipped
        to 47 degrees on the 29th and 43 degrees on the 30th...
        setting record minimums for the dates.  Upslope cloudiness
        along with rain and fog early on the 29th helped set a
        record low maximum temperature of 58 degrees for the date.
29    In 1878...a total eclipse of the sun was observed at 2:20 PM.
        From before to during the eclipse...the temperature in the
        sun fell from 114 degrees to 82 degrees...while the shade
        temperature fell from 89 degrees to 83 degrees.
      In 1880...heavy thunderstorm rain and hail flooded streets
        and ditches.  In 25 minutes...0.76 inch of rain fell on the
        city along with large hail to 3/4 inch in diameter.  There
        were no strong winds with the storm.
      In 1890...a thunderstorm produced sustained west winds to
        48 mph with gusts to 60 mph...but only 0.01 inch of rain.
      In 1956...heavy rain and hail fell over west and north Denver.
      In 1964...hail to 3/4 inch in diameter fell at Lowry Airfield.
      In 1978...a small tornado was sighted just east of Parker.  No
        damage was reported.
      In 1989...heavy rain drenched all areas of the Front Range...
        both in the foothills and adjacent plains.  Amounts of 1 to
        3 inches were general over the area.  Damage was confined to
        a few minor road washouts and some street...basement...and
        crop flooding.  Thunderstorm rainfall totaled 1.44 inches at
        Stapleton International Airport where north winds gusted to
        43 mph.  Lightning struck a 250 thousand dollar home near
        Nederland and started a fire which destroyed all of it
        except two garages.  Lightning started a fire in a home in
        Evergreen.  It reached the house by hitting a tree...then
        traveling through a metal clothesline strung between the
        tree and the building.
      In 1995...thunderstorm winds gusted to 59 mph in Brighton.
        Thunderstorm winds from the south-southeast gusted to 41
        mph at Denver International Airport.  High temperature
        of 99 degrees was a new record maximum for the date in
        Denver.
      In 1997...heavy rain caused flooding in an apartment building
        in Westminster.  Several residents had to be evacuated from
        their apartments.  A woman in Aspen Park received minor
        injuries...when lightning passed through an office window
        and struck her.  She suffered temporary blindness for about
        15 minutes.
      In 2003...hail as large as 1 inch in diameter pelted Conifer...
        Highlands Ranch...and Franktown.
29-30 In 1997...heavy rain caused flooding and flash flooding in
        central portions of Adams and Arapahoe counties.  Two
        homes were extensively damaged when water flooded the
        basements and adjacent pasture area in Strasburg.  Water
        4 to 5 feet deep had pooled in the lower lying areas of
        the town.  A portion of Quincy Road was closed in Arapahoe
        County when 4 feet of water covered the roadway.
        Rainfall totaled 3.06 inches at Denver International
        Airport...establishing a new record for 24-hour rainfall
        in July.  The previous record was 2.42 inches set in 1965
        on the 24th and 25th.

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.