Public Information Statement
Issued by NWS Denver/Boulder, CO
NOUS45 KBOU 170045
Public Information Statement
National Weather Service Denver/Boulder CO
645 PM MDT SAT APR 16 2016
...This week in metro Denver weather history...
13-17 In 2001...a huge dust storm over southern and inner Mongolia
during April 3rd through the 6th lifted desert dust into
the jet stream. This dust cloud moved over metro Denver
on the 13th and persisted through the 17th. The cloud
created widespread haze...giving the sky a milkish cast
due to the scattering of incoming solar radiation.
15-17 In 1922...heavy snowfall totaled 9.0 inches in downtown
Denver. Most of the snow...6.0 inches...fell on the 16th.
This was the third major snow storm in a week. Northwest
winds were sustained to 43 mph with gusts to 47 mph on the
16-17 In 1944...heavy snowfall totaled 7.5 inches in downtown
Denver. Northwest winds were sustained to 18 mph on
16-18 In 2009...a potent spring storm brought heavy snow to locations
in and near the Front Range Foothills. A deep easterly
upslope produced nearly 5 feet of snow in parts of the
foothills. The heavy snow resulted in the closure of
Interstate 70...from Golden west to Vail...for approximately
16 hours. The heavy snow snapped power lines in Evergreen
and Nederland. The ensuing outages affected 14200
In the Front Range Foothills...storm totals included: 56
inches...3 miles south of Rollinsville; 54 inches...3 miles
southeast of Pinecliffe...43 inches at Aspen Springs...42
inches at Evergreen...38 inches near Conifer; 37 inches at
St. Mary`s Glacier...and 34 inches near Nederland.
Along the Urban Corridor and Palmer Divide...the heaviest
snow occurred above 5500 feet on the 17th. Storm totals
included: 22 inches...8.5 miles southwest of Franktown; 18
inches...10 miles south-southeast of Buckley Air Force Base;
17 inches near Cherry Creek and 7 miles south of Sedalia...
16 inches...6.5 miles southwest of Castle Rock; 15 inches
near Beverly Hills; 12 inches near Highlands Ranch and
Lafayette...with 11 inches in Broomfield. Elsewhere storm
totals ranged from 4 to 10 inches. Officially...only 2.6
inches of snow was observed at Denver International Airport.
The 24-hr precipitation for the day however was 1.16 inches...
which established a new record for Aprtil 17th.
17 In 1889...northwest winds were sustained to 48 mph.
In 1899...apparent post-frontal north winds were sustained
to 42 mph with gusts as high as 48 mph.
In 1935...light dust moved over the city behind an apparent
dry cold front...which produced northeast winds to 19 mph
with gusts to 20 mph.
In 1978...winds estimated to 70 mph occurred in Morrison.
Northwest winds gusted to 49 mph at Stapleton International
In 2000...strong pre-frontal winds and widely scattered
thunderstorms caused high winds to develop across northern
metro Denver and portions of the northeast plains. Peak
wind gusts included 75 mph at Louisville. South winds
gusted to only 28 mph at Denver International Airport.
In 2002...strong southwest winds in advance of a cold front
gusted to 52 mph at Denver International Airport.
In 2003...severe thunderstorms produced 1 inch diameter hail
7 miles east of Brighton. Strong thunderstorm winds blew
out an auto windshield near Denver International Airport
where south winds gusted to 48 mph.
17-18 In 1878...the wind blew violently all day on the 17th with
a maximum sustained velocity of 40 mph. Dust hung over
the city like a cloud. The relative humidity was zero
nearly all day. A terrific gale blew overnight. There
was much damage to buildings...signs...fences...etc. Some
wind gusts were so strong as to jar buildings to their
foundations. The station anemometer recorded sustained
winds to 50 mph with higher gusts before it was damaged
by the winds. The winds moderated during the day on the
18th and ended at sunset.
In 1894...post-frontal rain changed to snow on the 17th
around sunrise and continued through 9:00 AM on the 18th.
Snowfall totaled 10.5 inches...but most of the snow melted
as it fell. The high temperature warmed to only 35 degrees
on the 17th after a high of 76 on the 16th. Northeast
winds were sustained to 30 mph with gusts to 32 mph on
In 1998...more spring snow fell across metro Denver and in
the foothills. Snowfall totals included: 11 inches at
Golden Gate Canyon; 10 inches at Highlands Ranch; 9 inches
at Elizabeth; 8 inches at Broomfield and Morrison; and 7
inches at Chief Hosa...Evergreen...Littleton...and Sedalia.
Snowfall totaled only 3.2 inches at the site of the former
Stapleton International Airport. North winds gusted to
22 mph at Denver International Airport.
17-19 In 1920...snow fell across the city continuously for 57 hours...
from the early morning of the 17th until 11:40 AM on the
19th. The heavy wet snowfall totaled 18.2 inches with the
greatest accumulation on the ground of 12 inches. Winds
during the storm were strong with sustained speeds in
excess of 27 mph for over 40 consecutive hours...which
created near-blizzard conditions. The highest recorded
wind speeds were 44 mph with gusts to 50 mph from the
north on the 17th and 39 mph with gusts to 48 mph from
the northwest on the 18th. The strong winds piled the
snow into high drifts which stopped all Denver traffic.
Railroads were blocked with only one train entering the
city on the 19th. All interurban trains were blocked...as
were the 13 trolley lines. Thus...many workers were unable
to get home at night and filled all of the downtown hotels
to capacity. No grocery or fuel deliveries were possible...
except milk and coal to hospitals and to families with
babies. No lives were lost in the city...but several people
perished in surrounding districts. Stock losses were heavy
on the plains. Temperatures during the storm were in the
18 In 1877...strong winds blew all day with an average sustained
velocity of 36 mph. The maximum sustained velocity was
60 mph. No significant damage was reported.
In 1903...northwest winds were sustained to 48 mph with gusts
to 53 mph.
In 1936...light dust spread over the city from the east on
southeast winds gusting to 25 mph. The surface visibility
was reduced to about 2 miles at times.
In 1940...this date marked the start of the longest period
without snow...200 days...through November 3...1940. A trace
of snow fell on both April 17...1940...and November 4...1940.
In 1963...strong winds were prevalent all day across metro
Denver. West-northwest winds gusting to 60 mph produced
some blowing dust at Stapleton Airport.
In 1971...a microburst wind gust to 59 mph produced some
blowing dust at Stapleton International Airport.
In 1978...high winds caused much blowing dust over the plains.
Wind gusts from 80 to 96 mph were reported in Boulder with
80 mph measured on Lookout Mountain. Northwest winds
gusted to 43 mph at Stapleton International Airport.
In 2000...high winds developed in the foothills of Boulder
County. Peak wind gusts included 71 mph at the National
Center for Atmospheric Research Mesa Lab near Boulder.
In Aurora...three workers were injured when strong winds
caused a home under construction to partially collapse.
Two received minor injuries...while the third worker had
to be hospitalized with severe back injuries. South
winds gusted to 47 mph at Denver International Airport.
In 2002...strong northeast winds behind a cold front gusted
to 53 mph at Denver International Airport where some
blowing dust briefly reduced the visibility to 3 miles.
18-19 In 1884...a major storm dumped 13.8 inches of snowfall on
downtown Denver. Most of the snow...10.0 inches...fell on
the 18th. Light rain on the early morning of the 18th
changed to heavy snow at 8:00 AM and became light after
2:00 PM but continued until 4:00 AM on the 19th. The
snow melted nearly as fast as it fell. There were only
3 inches on the ground early on the morning of the 19th.
In 1941...heavy snowfall totaled 8.4 inches over downtown
Denver. Northeast winds were sustained to 17 mph.
In 1993...sporadic high winds occurred across metro Denver.
Significant wind gusts included 97 mph at Rollinsville...
80 mph in southwest Boulder...and 55 mph at Stapleton
International Airport. The strong winds snapped a pine
tree top...about 15 feet long and 8 inches in diameter...which
crashed through the roof of a church in Evergreen...causing
one thousand dollars in damage. Wind gusts of 50 to 60 mph
caused structural damage to 3 homes under construction in
Broomfield. Northwest winds gusted to 55 mph at Stapleton
In 1995...the second spring storm of the month dumped heavy
snow in the foothills. The upslope flow along with areas of
thunder snow dropped 6 to 12 inches of snow in the foothills
west of Denver and Boulder. Snowfall totaled 4.6 inches at
the site of the former Stapleton International Airport...but
most of the snow melted as it fell. East winds gusted to
29 mph at Denver International Airport on the 18th.
18-20 In 1966...sub-freezing temperatures caused thousands of
dollars in damage to fruit trees across metro Denver.
Minimum temperatures were in the teens each morning and
failed to reach above freezing on the 19th. The low
temperature of 13 on the 20th set a new record minimum for
the date. Snowfall totaled 5.7 inches at Stapleton
International Airport during the period.
19 In 1899...northwest winds were sustained to 48 mph with
gusts as high as 60 mph in the city.
In 1941...the last snow of the season...0.4 inch...occurred...
marking the end of the shortest snow season...167 days.
The first snow of the season...a trace...occurred on
In 1954...strong gusty winds raked metro Denver for most of
the day producing some blowing dust. At midday...a severe
dust devil was sighted in the Westwood area of southwest
In 1955...cold west winds at 52 mph with gusts as high as 69
mph were recorded at Stapleton Airport where blowing dust
reduced the visibility to 1/2 mile.
In 1960...the second wind storm in 3 days produced sustained
west winds up to 44 mph with gusts as high as 58 mph at
Stapleton Airport. Winds were strong and gusty most of
the day...but no damage was reported.
In 1963...the second windy day in a row produced west-
northwest wind gusts to 52 mph at Stapleton Airport.
In 1971...a tornado occurred in the southwest corner of Weld
County about 10 miles west-northwest of Brighton. The
storm moved through a farm yard damaging equipment and
structures. The strong tornadic winds lifted a stock tank
over 2 fences into a corral 150 feet away. Later...a
tornado touched down briefly west-southwest of Buckley
Field...8 miles southeast of Stapleton International
Airport. No damage was reported.
In 1985...high winds occurred in the foothills. Winds gusted
to 97 mph atop Squaw Mountain in the foothills west of
Denver. West winds gusted to 37 mph at Stapleton
In 1987...a powerful cold front produced high winds and
engulfed metro Denver in huge clouds of blowing dust that
lowered the visibility to as little as 100 yards. The cold
front generated winds as high as 72 mph at Brighton...67 mph
in Thornton...and 54 mph at Stapleton International Airport.
Winds of 50 to 70 mph were common along the Front Range from
Denver north. The high wind gusts flipped a light plane
taxiing at Stapleton International Airport...slightly
injuring two people on board. The cold front dropped the
temperature from a high of 80 degrees at 3:00 pm to a low of
33 degrees at midnight. Nearly an inch of snow...0.8 inch...
fell at Stapleton International Airport before midnight.
In 1988...a tornado touched down in Fort Lupton...following a
path 50 to 75 yards wide for 2 1/2 blocks. The twister
damaged roofs on 2 schools and broke numerous windows;
about 10 houses were damaged and several cars had windows
blown out. Several trees were downed.
In 1989...winds were clocked to 68 mph in Wheat Ridge.
Microburst winds gusted to 35 mph at Stapleton International
In 1996...high winds gusting from 70 to near 100 mph developed
in the Front Range foothills and adjacent plains. Numerous
power outages were reported as power lines and poles were
downed. The high winds blew the chimney off the roof of a
house in Westminster. Numerous homes received minor shingle
damage. Some of the stronger wind gusts included: 98 mph
at Jefferson County Airport in Broomfield...91 mph atop Squaw
Mountain west of Denver...and 75 mph atop Table Mesa near
Boulder. West northwest winds gusted to 45 mph at Denver
In 2001...westerly chinook winds...gusting as high as 40 mph at
Denver International Airport...prevented the low temperature
from dropping below 51 degrees...setting a new record high
minimum for the date. The high temperature of 77 degrees
was not a record.
In 2005...severe thunderstorms produced large hail across
metro Denver. Hail as large as 1 1/4 inches in diameter
was measured in Arvada. Hail to 1 inch in diameter fell in
Westminster...Northglenn...and Thornton. Hail to 7/8 inch
was reported near Brighton...Barr Lake...and Castle Rock.
Hail to 3/4 inch fell in Elizabeth and Broomfield and near
Golden...Brighton...and Fort Lupton.
19-20 In 1892...rain on the 18th changed to snow on the 19th and
totaled 6.0 inches over downtown Denver into the 20th.
Total precipitation was 1.56 inches. North winds were
sustained to 26 mph on the 19th.
In 1907...a major storm dumped 18.0 inches of snowfall in
downtown Denver. Much of the heavy wet snow melted as
it fell. The most snow on the ground was 7.0 inches at
6:00 PM on the 19th. North to northeast winds were
sustained to 42 mph on the 19th and to 21 mph on the
20th. High temperatures were in the low to mid 30`s
with low readings around 20.
19-21 In 1984...a large snowstorm buried most of Colorado under a
thick mantle of wet snow. Total snow amounts ranged from
10 to 20 inches across metro Denver and a whopping 20 to
40 inches in the adjacent foothills. The snow closed roads
and damaged electrical transformers...causing numerous power
outages. Nearly 14 inches (13.6) of snow fell at Stapleton
International Airport where the combination of snow and
wind closed all but one runway...resulting in the cancellation
of many flights. Both I-70 and I-76 were closed to the east
19-22 In 1933...a major storm dumped 16.8 inches of snowfall over
downtown Denver when rain changed to snow during the early
morning of the 20th and continued through midday of the
22nd. Most of the snow fell on the 21st. Due to melting...
the most snow on the ground was 10.5 inches at 6:00 PM on the
21st. Before the snow started...a strong cold front on the
evening of the 19th produced north winds sustained to 35 mph
with gusts to 37 mph. The strong winds deposited a thin
layer of dust on the city. North to northwest winds were
sustained to 31 mph with gusts to 35 mph on the 20th and to
29 mph with gusts to 32 mph on the 21st.
20 In 1874...light snow fell for most of the day...but melted almost
as fast as it fell. The flakes...as large as 1 1/2 inches in
diameter during the afternoon...resembled white feathers.
Precipitation from melted snow was only 0.21 inch in the
city. Snowfall was much heavier in the mountain parks
where snow depths were reported between 3 and 5 feet from
the storms of the 15th and 20th. The heavy snow resulted
in the deaths of hundreds of cattle and sheep.
In 1875...the city was enveloped in a severe wind and sand
storm. For nearly 30 minutes before the storm...it could
be seen moving toward the city from the northwest as a black
wall of clouds extending only 10 degrees above the horizon.
At 5:30 PM...the sand was sweeping past in such clouds that
objects at a distance of only 10 yards were not visible.
The streets were entirely deserted. The greatest velocity
of wind during the storm was 36 mph from the north-northwest.
The storm diminished by 7:00 PM. Swarms of grasshoppers were
seen today and were reported in all parts of the territory.
In 1897...southwest winds were sustained to 46 mph with gusts
to 50 mph. The apparent chinook winds warmed the
temperature to a high of 76 degrees.
In 1905...apparent post-frontal north winds were sustained to
In 1912...west winds were sustained to 42 mph with an extreme
velocity of 48 mph.
In 1958...strong chinook winds gusted to 52 mph at Stapleton
In 1981...3/4 inch hail fell in Lakewood with up to one half
inch of rain in a few minutes across northern sections of
of the City of Denver. Thunderstorm rainfall totaled
0.39 inches at Stapleton International Airport...where
1/4 inch hail was also measured.
In 1987...6 to 12 inches of heavy snow fell in the foothills.
Only 2.5 inches of snow fell at Stapleton International
Airport where the usual flight delays occurred.
In 2005...severe thunderstorms produced large hail across
metro Denver. Hail as large as 1 3/4 inches in diameter
fell at Denver International Airport. Hail to 3/4 inch
in diameter fell in and near Golden and near Hudson...
Keenesburg...Barr Lake...and Bennett.
In 2013...an avalanche pushed a group of six snow boarders
into the Sheep Creek gully of Loveland Pass. This is
near but outside the Loveland Ski Area boundary. Five of
the six members of the group died as they were completely
buried. The avalanche is the deadliest in Colorado since
1962 when seven people were killed when a slide buried
residents at Twin Lakes near Independence Pass.
20-22 In 1957...strong and gusty south to southeast winds raked
metro Denver each day. The strongest wind gust of 55 mph
occurred on the 21st when blowing dust briefly reduced the
visibility to 3/4 mile at Stapleton Airport.
20-23 In 1989...unusually warm weather resulted in several daily
temperature records being broken in Denver. The high
temperature of 89 degrees on the 21st exceeded the record
maximum for the month at that time. Daily record high
temperatures were either exceeded or equaled with 83
degrees on the 20th...88 degrees on the 22nd...and 85
degrees on the 23rd. The low temperature of 55 degrees
on the 22nd equaled the record high minimum for the date.
21 In 1885...rain changed to snow during the early morning and
was the heaviest snow of the season. Total snowfall was
estimated at 8.0 inches over downtown Denver...but the
snow melted rapidly on the ground as it fell. However...
the weight of the snow...as well as northwest winds
sustained to 29 mph downed telegraph and telephone wires.
Several large branches of trees were also broken by the
weight of the snow. Precipitation totaled 1.01 inches
from the storm.
In 1887...west winds were sustained to 47 mph.
In 1932...the temperature dipped to a low of only 60 degrees...
the all-time record high minimum for the month.
In 1988...a small tornado was observed by National Weather
Service employees about 3 miles northwest of Thornton. It
was on the ground for about 2 minutes. No damage was
reported. Later...lightning struck two 14-year-old girls on
a softball field in Westminster. One was killed...while the
other suffered moderate injuries. Northwest winds gusted
to 44 mph at Stapleton International Airport behind a
In 2010...severe thunderstorms produced large hail...strong
winds and a tornado across parts of Adams...Arapahoe...
Elbert...and Weld Counties. The hail...up to 1.50 inches
in diameter...came down so heavy along parts of I-70
and I-76 that snowplows had to be called out to remove
it. Numerous vehicles were damaged by hail. In Weld
County...very heavy rain and hail accompanied
thunderstorm winds up to 75 mph. Hail up to 1.50 inches
was reported near Bennett; 1.25 inches...5.3 miles east
of Englewood; 1.0 inch size hail near Buckley Field; with
0.88 inch size hail near Boulder. A weak tornado touched
down briefly in Elbert County...about 9 miles southwest of
Deer Trail...but did no damage. Several minor accidents
were reported with snowpacked and slick road conditions
along with very low visibilities. Minor street flooding
was reported in southeast Aurora. Denver International
Airport recorded 0.30 inches of rainfall. Also...a peak
wind gust to 36 mph from the southeast was observed at
21-22 In 1910...north winds were sustained to 45 mph behind a cold
front. Rainfall totaled 0.63 inch.
In 1923...snowfall of 2.0 inches in the city was the only
snow of the month and the last measurable snow of the
season. Northwest winds were sustained to 25 mph on
In 1952...heavy snowfall totaled 7.6 inches at Stapleton
Airport. The storm was accompanied by north winds gusting
to 33 mph.
In 2001...the second major snow storm in 11 days moved into
metro Denver with blizzard conditions developing again
across the plains to the northeast of Denver. Snowfall
amounts ranged up to 9 inches in metro Denver with up to
23 inches in the foothills. Northwest winds were sustained
at 20 to 30 mph with gusts as high as 36 mph at Denver
International Airport which was again shut down for nearly
an hour by power outages on the 22nd. The outages affected
lighting in the concourses...train operations...de-icing and
refueling operations...flight information displays...and
security screenings. Navigational aids were also affected...
resulting in the cancellation of 58 arriving and departing
flights which stranded about 5000 passengers. Across metro
Denver storm totals included: 9 inches at Eldorado Springs;
7 inches in Boulder; 6 inches at Ken Caryl...Northglenn and
near Sedalia; and 5 inches in Arvada and Morrison. Only
1.7 inches of snow were measured at the site of the former
Stapleton International Airport. In the foothills snow
totals included: 23 inches near Fritz Peak south of
Rollinsville...17 inches near Jamestown...16 inches near
Blackhawk...14 inches in Coal Creek Canyon...13 inches at
Idaho Springs and near Nederland...11 inches at Aspen
Springs...and 10 inches near Bergen Park.
21-23 In 1999...a spring snowstorm dumped heavy snowfall over metro
Denver and in the foothills. Nearly 3 feet of snow fell
in the foothills with over a foot in the city. The heavy
wet snow downed power lines in Douglas and Elbert counties.
Scattered outages were reported at Parker...Franktown...
Sedalia...and Castle Rock. Some residents were without
electricity for as long as 20 hours. The inclement weather
was blamed...at least in part...for several traffic accidents
along the I-25 corridor between Denver and Castle Rock.
Snowfall totals included: 32 inches at Idaho Springs; 31
inches on Crowhill; 29 inches near Evergreen; 26 inches at
Chief Hosa and Coal Creek Canyon; 25 inches at Bailey; 24
inches at Floyd Hill; 23 inches at Conifer...Genesee...Golden
Gate Canyon...North Turkey Creek...and Pine Junction; 13
inches at Broomfield and near Sedalia; 12 inches in
Boulder; 11 inches at Louisville and Parker; and 9 inches
at the site of the former Stapleton International Airport.
In 2004...heavy snow fell across metro Denver...when low level
upslope conditions developed against the foothills and
Palmer Divide. Snowfall totals included: 18 inches in the
foothills southwest of Boulder...17 inches at Intercanyon and
near Conifer...10 inches near Blackhawk and Parker...9 inches
at Castle Rock and near Sedalia...7 inches in Centennial...
Littleton...and near Lone Tree. Elsewhere across metro
Denver...snowfall generally ranged from 2 to 5 inches.
Snowfall was 4.7 inches at Denver Stapleton. Northwest
winds gusted to 35 mph at Denver International Airport
on the 21st.
22 In 1896...southwest winds were sustained to 39 mph with gusts
as high 56 mph. The apparent chinook winds warmed the
temperature to a high of 78 degrees.
In 1904...west winds sustained to 40 mph with gusts to 48 mph
warmed the temperature to a high of 69 degrees.
In 1925...southeast winds sustained to 42 mph with gusts
to 46 mph warmed the temperature to a high of 76 degrees.
In 1958...west-northwest winds gusted to 48 mph at Stapleton
22-23 In 1885...the worst snow storm since station records began in
1872 dumped a total of 24.0 inches of snowfall on the city.
The 23.0 inches of snow recorded on the 22nd and 23rd was
the greatest 24-hour snowfall ever recorded during the
month of April. Streets were impassable...roofs caved in...
telegraph and telephone wires were downed...railroads were
blocked and trains delayed...and most business came to a
complete standstill. Estimated losses were reported to
50 thousand dollars. The total snowfall was partly
estimated due to melting. Precipitation from the storm
totaled 2.79 inches.
In 1915...post-frontal rain during the day and overnight
totaled 2.00 inches. Most of the rain fell on the 22nd.
In 1945...6.7 inches of snow fell over downtown Denver. This
was the third major snow in a little over 3 weeks...which
made this month the 4th snowiest on record. Northeast winds
were sustained to 25 mph and light hail fell on the 22nd.
In 2013...a spring storm brought heavy snow to the mountains...
with period of moderate to heavy snow to portions of the
Front Range Foothills and Urban Corridor. In the mountains
and foothills...storm totals included: 18 inches at Niwot
Ridge SNOTEL; 16.5 inches near Ward; 13 inches at Arapahoe
Basin and Roach SNOTEL...12 inches near Blackhawk; 11.5
inches near Nederland; 11 inches near Allenspark and at
Loveland Ski Area; 10 inches near Idaho Springs and
Pinecliffe; with 9.5 inches and near Silverthorne. Along
the Urban Corridor storm totals included: 7.5 inches near
Morrison; 7 inches at the National Weather Service Office
in Boulder and Niwot; 6.5 inches near Arapahoe Park and
Superior; with 6 inches at Lafayette and Lakewood. At
Denver International Airport...4.7 inches of new snowfall
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 In 1889...north winds were sustained to 48 mph.
In 1913...northeast winds were sustained to 46 mph with gusts
to 60 mph behind a dry cold front.
In 1914...a thunderstorm produced considerable hail and 0.29
inch of rain. West winds were sustained to 42 mph with
gusts to 48 mph.
In 1942...hail of unknown size fell over the city.
In 1958...a funnel cloud was sighted for 20 minutes...15 miles
southeast of Stapleton Airport. The funnel formed in
advance of a thunderstorm and hung about a thousand feet
below the base of the cloud...but remained aloft. Later in
the day...3.6 inches of snow fell at Stapleton Airport.
In 2002...persistent dry conditions in the foothills
contributed to the first large forest fire of the season
near Bailey. Very dry and windy conditions allowed the
fire...initially started by a careless smoker...to grow
into a 2400-acre blaze before it could be contained.
Fortunately...no significant damage occurred to homes or
other property in the area.
In 2006...severe thunderstorms produced large hail across
metro Denver. Hail as large as 1.25 inches in diameter
fell in south Denver with hail to 0.88 inch across the
rest of the city. Hail to 1.00 inch in diameter was
reported near Morrison...in south Lakewood...and in Aurora
near Cherry Creek. Hail to 0.88 inch was measured in
Golden with 0.75 inch hail in east Lakewood.
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
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