Public Information Statement
Issued by NWS Denver/Boulder, CO
NOUS45 KBOU 210859
Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT WED SEP 21 2016
...Today in metro Denver weather history...
20-21 In 1963...heavy rain and hail caused local flooding in
southeast Denver. Thunderstorm rainfall was only
0.60 inch at Stapleton Airport on the 20th.
In 1983...the cold front on the 19th brought an unusually cold
air mass into metro Denver for so early in the season. The
temperature dipped to a daily record minimum of 28 degrees
on both days.
In 1995...a vigorous late summer storm brought the season`s
first heavy snow to portions of metro Denver. Millions
of trees were damaged and power lines downed as 4 to 8
inches of heavy wet snow settled on fully leafed trees in
the Boulder and Denver areas. Branches snapped and trees
split under the weight of heavy snow...downing power lines.
Firefighters responded to numerous transformer fires.
Around 100 thousand people were left without electricity
in Boulder and Denver areas alone. It took over a week
to fully restore power to some areas. Insurance claims
were estimated to be around 6 million dollars to homes
in metro Denver and about 500 thousand dollars in damage
to automobiles. It was estimated that about 80 percent
of 125 million dollars worth of city owned trees in Denver
were damaged. Snowfall totaled 7.4 inches at the site of
the former Stapleton International Airport where the
greatest depth of snow on the ground was only 4 inches
due to melting. Temperature records were set on the
21st when the thermometer dipped to a record low reading
of 27 degrees and climbed to a high of only 36 degrees...
setting a record low maximum for the date. North winds
gusted to 29 mph at Denver International Airport on the
20-22 In 1902...a thunderstorm on the 20th...in advance of an
apparent cold front...produced rain...hail...and northwest
winds to 40 mph with gusts to 48 mph. Widespread rain
developed behind the cold front and totaled 3.21 inches
from the evening of the 20th through the early afternoon
of the 22nd. The 2.70 inches of precipitation recorded
from 800 PM on the 20th to 800 PM on the 21st is the
greatest 24 hour precipitation ever recorded in the
month of September. The temperature dipped from a high
of 80 degrees on the 20th to a high of only 51 degrees
on the 21st.
21 In 1951...4.2 inches of snow fell at Stapleton Airport...
where northeast winds gusted to 27 mph. This was the
first snowfall of the season in Denver...marking the end
of the second shortest snow-free period on record...109
days...from June 4th through September 20th. A trace of
snow fell on June 3rd.
In 1984...thunderstorm winds gusted to 56 mph at Stapleton
In 1992...the only precipitation of the month at Stapleton
International Airport...0.01 inch of rain...fell from a
brief shower around daybreak.
In 2009...an early season storm brought moderate to heavy
snow to the foothills of Clear Creek...Jefferson and Park
Counties...west and southwest of Denver. A trained
spotter...4 miles west-northwest of Conifer...was the big
winner with 14 inches of snow. Storm totals elsewhere
generally ranged from 5 to 10 inches.
21-22 In 1870...strong winds occurred in the foothills and in
Boulder and Denver.
In 1895...rain changed to snow overnight and totaled 11.4
inches in downtown Denver. This was the first snowfall
of the season and the second heaviest first snowfall of
the season on record. North winds were sustained to 27
mph with gusts to 30 mph on the 21st.