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Boulder wind info

Boulder has some of the highest peak winds of any city in the US. Below is a list of significant Boulder area wind events and a table of high wind events per month. Inconsistent reporting may mean that events are missing or that the wind speeds are not accurate.

For more recent events and for more detailed info, see: Severe Weather Database in the US from NCEI. NCEI maintains a link to PDF versions of the severe weather bulletin going furthe back in time.

Fires and Winds

There have been fires associated with strong winds in the Boulder area. See Apr 6-7 1969, Jan 18 2006, Jan 7 2009, Feb 9-10 2017, and Dec 30 2021. The 2006, 2017, and 2021 were grass fires.

Other links of interest

1. National Renewable Energy Laboratory (NREL)
2. Seasonal cycle of Boulder winds
3. What causes wave clouds

All speeds in MPH unless indicated. Gust is peak gust in Boulder (or very near) unless indicated. Dates with gusts greater or equal to 100 MPH are shaded darker pink. Those 80 and over are lighter pink.

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1966

Year	Date(s)	Time of day	Gusts	Comments
1966	Sep 13-14	unknown	60+	snow,extensive tree damage
1967	Jan 15-16	night	125	NCAR (75 city) Chinook

1967

Year	Date(s)	Time of day	Gusts	Comments
1967	Dec 6-7	8am-noon	~75

1968

Year	Date(s)	Time of day	Gusts	Comments
1968	Dec 4	midday	>50
1968	Dec 11-12	10pm-11am	50-75

1969

Year	Date(s)	Time of day	Gusts	Comments
1969	Jan 7-8	evening	130	NCAR freq gusts >100 6-9pm 96 in 25 roofs blown off. heavy damage in Boulder area
1969	Mar 19	am	60-70	estimated 80-90
1969	Apr 6-7	unknown	50-60	started fires
1969	June 25	10am-mid pm	120	Table Mesa (70 Boulder)
1969	Dec 20	8:30-10:30p	>100	NCAR: 60-70 Boulder and Rocky Flats widespread but moderate damage
1969	Dec 21	2130	115	NCAR

1970

Year	Date(s)	Time of day	Gusts	Comments
1970	Jan 24-25	aft to evening next day	122	wind 60-70 light widespread damage along front range
1970	Jan 26	0706	109	NCAR
1970	Feb 2	3pm to 12am	> 100	60 to 100
1970	Feb 3	1530,2100	115,102	NCAR
1970	Feb 17	0100	90	NCAR
1970	Apr 14		45-60	most of state
1970	Nov 21	1450	94	Boulder
1970	Nov 25	0200	97	NCAR
1970	Nov 30	day	> 60	80-90 in Boulder area
1970	Nov 30	2245	112	NCAR
1970	Dec 1	1230	107	NCAR
1970	Dec 28	2100	87	NCAR
1970	Dec 31	1400	92	NCAR

1971

Year	Date(s)	Time of day	Gusts	Comments
1971	Jan 23		147	at NCAR ONLY. One wind gust
1971	Mar 31	pm	45-65	foothills
1971	Mar 6	7-11pm	69	69 at 7:30 and 64 at 11

1972

Year	Date(s)	Time of day	Gusts	Comments
1972	Jan 5	day	85
1972	Jan 9-10	aft to morn	86	blew many trees down
1972	Jan 11-12	morn-morn	97	much damage to cars, buildings, power-lines, etc. in Boulder
1972	Jan 22	early aft	71	killed motorcyclist
1972	Jan 24	aft	92	at 1:00pm
1972	Jan 28	night	90	at 10:45
1972	Nov 29-30		50-60	foothills
1972	Oct 24	morning	75	recorded at NIST
1972	Dec 12	morning	> 100	120 in area at 7:30am

1974

Year	Date(s)	Time of day	Gusts	Comments
1974	Nov 12		> 80	foothills area

1975

Year	Date(s)	Time of day	Gusts	Comments
1975	Jan 5-6	5-6pm 5th	> 75	house and business damage am 6th
1975	Jan 18	unknown	> 80	much damage along front range
1975	Jan 20	unknown	> 80	Boulder/Longmont/Denver
1975	Apr 27-28	unknown	> 85	85 evening 27th Fort Collins, Greeley
1975	Jun 25-26	night	unknown	strong winds
1975	Oct 8	unknown	> 100	gusts over 60 front range and one over 100 in Boulder
1975	Nov 30-Dec 2	unknown	> 100	Chinook all along foothills gusts > 100
1976	Jan 15	unknown	70-80	Chinook Wyoming to Co springs
1976	Feb 7	unknown	90	gusts 46-49 NCAR and 70-90
1976	Feb 17-18	unknown	30-60
1976	June 14	daytime	82	ERL had 82 at 14:32 87 at Rocky Flats 99 200' above ground widespread damage

1976

Year	Date(s)	Time of day	Gusts	Comments
1976	Jan 15	unknown	70-80	Chinook Wyoming to Co springs
1976	Feb 7	unknown	90	gusts 46-49 NCAR and 70-90
1976	Feb 17-18	unknown	30-60
1976	June 14	daytime	82	ERL had 82 at 14:32 87 at Rocky Flats 99 200' above ground widespread damage

1977

Year	Date(s)	Time of day	Gusts	Comments
1977	Nov 22	morning	101	SW Boulder
1977	Nov 26	midday	109	winds blew out windows and injured some. 90 Rocky Flats
1977	Nov 29	morning	?	85 Wondervu
1977	Dec 2	morning	103	60-103 in Boulder
1977	Dec 3	all day	90	74-90 gusts in Boulder
1977	Dec 6	afternoon	85
1977	Dec 7	all day	115	much damage to trailers and cars
1977	Dec 22	morning	93	Recorded at Table Mesa
1977	Dec 23	morning	90
1977	Dec 24	morning	70

1978

Year	Date(s)	Time of day	Gusts	Comments
1978	Aug 14	1500-1700	101	92-101
1978	Nov 28	all day	60-90	foothills
1978	Dec 4	afternoon	?150	50-150 Boulder area (unclear where the 150 was)
1978	Dec 23-24	all day	90	90 in morning in Boulder 73 in afternoon

1979

Year	Date(s)	Time of day	Gusts	Comments
1979	Feb 7	aft,eve	99	50-80 common along front range

1981

Year	Date(s)	Time of day	Gusts	Comments
1981	Feb 8	midday	50
1981	Mar 29-31	all day	60-70	foothill canyons

1982

Year	Date(s)	Time of day	Gusts	Comments
1982	Jan 3-4	all day	85	Table Mesa
1982	Jan 14	unknown	104	Chinook
1982	Jan 16-17	night-aft	137	at NCAR 2:30am; 20 gusts > ;120 40% of all Boulder buildings damaged. 136 Lyons
1982	Jan 23	unknown	60-80
1982	Jan 24	unknown	92	(mostly Fort Collins)
1982	Mar 9	min	60-90	Chinook
1982	Mar 12	unk	90
1982	Mar 29-30	all day	90
1982	Apr 2	all day	60-80	127 Rocky Flats
1982	Apr 12	unk	60	100 Jeffco airport
1982	Aug 20	eve	72	Thunderstorm SE Boulder
1982	Dec 18-20	midday	75-80	19th 62 evening of 20th

1983

Year	Date(s)	Time of day	Gusts	Comments
1983	Jan 5-6	unk	60-75
1983	Jan 9-10	unk	70-90
1983	March 30	aft	82	at NCAR 2:30
1983	March 31	aft	70
1983	July 10	evening	70	thunderstorm
1983	Dec 5-8	all day	102	on the 6th. Also on 8th, 97 SE Boulder 60-70 in general

1984

Year	Date(s)	Time of day	Gusts	Comments
1984	Jan 29	0100-0400	71
1984	Apr 11	1430-1830	72	Rocky Flats; 70 in Boulder Chinook
1984	May 12	evening	69
1984	May 31	1843	67	thunderstorm 7 miles E Boulder
1984	Nov 28	morning	60-80
1984	Dec 22-23	all day	108	Table Mesa 339 am and 1030

1985

Year	Date(s)	Time of day	Gusts	Comments
1985	Mar 26	1000-1700	76	widespread winds
1985	Apr 19	all day	62	Longmont
1985	Jun 21	0145	60	Longmont
1985	Oct 22	0800-1300	89	eastern Boulder
1985	Dec 3	morning	78	Table Mesa at 816
1985	Dec 14	0710	61	Table Mesa
1985	Dec 25	2051	68	Table Mesa (in snow)

1986

Year	Date(s)	Time of day	Gusts	Comments
1986	Jan 2	morning	82	Table Mesa (60-80 in Boulder)
1986	Jan 4	1000	61	Longmont
1986	Jan 18	1605	60
1986	Jan 20	1100-2200	?	strong winds N Denver
1986	Jan 28	1020	67
1986	Feb 15	0000-1500	95	500 Boulder Chinook
1986	Feb 16-17	all day	89	Table Mesa 2333 Chinook
1986	Feb 22	1000-2000	60	Longmont
1986	Feb 24	0606	65
1986	Mar 9	0000-0800	60-70	N of Colorado Springs to Boulder
1986	Apr 2	1730-1900	70	thunderstorm winds
1986	Apr 13	1996 0300-1300	79
1986	May 4-5	2000-1000	60-75	cold front
1986	Sep 24	all day	131	2200 Table Mesa; Davidson Mesa 118; IBM 92, trees down, power out, cars damages
1986	Nov 15	evening	81	Table Mesa; Chinook winds 1925

1987

Year	Date(s)	Time of day	Gusts	Comments
1987	Jan 28-29	all day	99	8 MST NCAR Rocky Flats 99 at night
1987	Apr 19	1530-1900	50-70	all along front range from cold front
1987	Dec 7	morning	93	NCAR at 8mst; 76mph in Boulder
1987	Dec 10	all day	60-75	most of NE Colorado
1987	Dec 21	morning	97	NCAR at 1000; 78 Boulder, 85 Table Mesa

1988

Year	Date(s)	Time of day	Gusts	Comments
1988	Jan 23	morning	105	Table Mesa at 534; 80-90 other areas in Boulder broke many windows and power out
1988	Feb 9	???	96	just east Boulder; 85 Rocky Flats at 1345; > ;60 many places between 1000 and 1800
1988	Feb 15	?	75	615
1988	Feb 21	evening	90	just east Boulder
1988	Feb 22	morning	83	0400
1988	Mar 25	midday	75	NW out of mountains at 1500
1988	May 7	morning	110	Table Mesa 515; 12000 lost power 92 Rocky Flats; 91 Boulder
1988	Sep 18	evening	82	in Longmont 1800-2200
1988	Oct 17	210	62	east Boulder
1988	Dec 12	morning	70	Table Mesa 722; 61 east Boulder
1988	Dec 13	unknown	66
1988	Dec 22	midnight-1000	95	N Boulder 80 Table Mesa 3-5 72 Boulder at 1800
1989	Jan 2	all day	60-70	along foothills

1989

Year	Date(s)	Time of day	Gusts	Comments
1989	Jan 9	4-11 am	115	Chinook; 115 Boulder airport, 103 S Table Mesa 92 SE Boulder
1989	Jan 16	midday-9	80	SW Boulder 2:28 100 Rollinsville
1989	Mar 14	morning	105	just east Boulder; 100 N city
1989	Nov 6	afternoon	54
1989	Nov 7	afternoon	60-70
1989	Nov 8-9	afternoon to am	?	95 Rollinsville
1989	Nov 24	afternoon	54	13:46

1990

Year	Date(s)	Time of day	Gusts	Comments
1990	Jan 8	all day	92	in morning; Table Mesa
1990	Jan 9	0000-0900	50-70	Longmont and along front range
1990	Jan 10	0000-0800	85	Chinook; very high temperatures
1990	Jan 29	0000-2100	94	Table Mesa winds 50-90
1990	Feb 8	1000-1400	>50
1990	Feb 10	0000-0900	93	Rollinsville; mostly higher in foothills
1990	June 1	1405	55	Thunderstorm winds
1990	June 1	1805	53	unknown cause
1990	Oct 13	1200-2000	96	NW Boulder 78 NCAR downslope winds
1990	Dec 2-3	0800-0200	>50	downslope winds all along foothills
1990	Dec 14-15	1030-1200	120	SW Boulder Bora winds

'

1991

Year	Date(s)	Time of day	Gusts	Comments
1990	Dec 30	0700-2100	91	Table Mesa downslope
1991	Mar 3-4	0000-2100	106	Shanahan Ridge
1991	Nov 6	0000	51	higher winds in foothills
1991	Nov 26	0000-1200	45	in morning; 51 Rocky Flats

1992

Year	Date(s)	Time of day	Gusts	Comments
1992	Jan 24	0000-2100	143	93 N Boulder (the 143 may be in knots)
1992	June 7	1350	52	Thunderstorm winds
1992	Aug 3	1725	50	Thunderstorm winds
1992	Dec 1	0000-0600	71
1992	Dec 9	0500-2200	95	Table Mesa
1992	Dec 20	1800-2400	69	Table Mesa

1993

Year	Date(s)	Time of day	Gusts	Comments
1993	Jan 20-22	0400-2000	55-65	75 at Rocky Flats
1993	Apr 18-19	1000-1200	80	SW Boulder
1993	May 26	1445-1500	90	Thunderstorm east Boulder
1993	June 7	1300-2000	60-80	nonconvective winds
1993	June 26	1615	80	Longmont thunderstorm
1993	Nov 20	2215	72	Table Mesa
1993	Dec 5	0200-1130	68	Table Mesa
1993	Dec 9	0635	73	Boulder

1994

Year	Date(s)	Time of day	Gusts	Comments
1994	Jul 2	1810	57	Thunderstorm winds Boulder
1994	Sep 12	2115	58	Microburst winds Boulder
1994	Oct 5	1544	52	Thunderstorm winds Lafayette
1994	Oct 6	0500-0600	68	High winds above 9500
1994	Nov 17	1050	57	High Winds
1994	Nov 28	0630	63	High Winds Boulder
1994	Nov 29	1500-1800	80	High Winds northern foothills
1994	Dec 11	1130-1500	58kts	High Winds Boulder
1994	Dec 19	0130-2100	80kts	Rocky Flats ; strong winds along front range

1995

Year	Date(s)	Time of day	Gusts	Comments
1995	Aug 6	1645-1700	50	Microburst Broomfield
1995	Nov 9	0400-1300	50-57k	Downslope winds Boulder area
1995	Nov 11	0400-1400	84	Downslope winds Boulder region
1995	Nov 11-12	2100-0630	124	at NCAR; other reports 90k table Mesa Golden Gate Canyon 86kts; Rocky Flats 74kts

1996

Year	Date(s)	Time of day	Gusts	Comments
1996	Jan 3	0700 2100	90kts	Boulder airport 85 S Boulder 82 NCAR, Chinook winds Front Range Foothills
1996	Jan 27-28	2100-1730	75 kts	NCAR part of pacific storm system
1996	Feb 19	0300-0600	70-75	Table Mesa
1996	Feb 23	0900-1300	61 kts	Table Mesa
1996	Apr 19	0500-1300	65 kts	Jeffco 85kts Table Mesa front range foothills
1996	Apr 24,25	1600m both	78 kts	Table Mesa
1996	Jun 5	1801	60	dry microburst
1996	Jun 20	2145-2155	61 kts	thunderstorm
1996	Oct 29	0430-1600	87	strong jet and A low in NE Plains: very strong
1996	Dec 2	0500-0730	101	upper table mesa,jeffco 101 winds front range foothills: winds unclear in Boulder
1996	Dec 4,5	2215-1030	75	westerly flow: Shanahan ridge strong all over area
1996	Dec 14	0345-1215	70	Table Mesa
1996	Dec 15,16	2100-0600	70,75	Table Mesa

1997

Year	Date(s)	Time of day	Gusts	Comments
1997	Jun 07	1200-1700		F1 Tornado next to Baseline Reservoir
1997	Dec 27	0900-0200	70	NCAR winds and snow

1998

Year	Date(s)	Time of day	Gusts	Comments
1998	Feb 25	0340-1530	60	S Boulder (bora)
1998	Dec 30	0130-1000	88	Rocky Flats ; Boulder power outages

1998-99

Year	Date(s)	Time of day	Gusts	Comments
1999	Jan 10	2230-0800	81	NCAR 72 Rocky Flats; large foothills area
1999	Jan 14	0900-1700	74	Boulder ; foothill region
1999	Jan 18	0000-1300	72	Rocky Flats, 70 NCAR; downslope winds
1999	Jan 26	1500-2300	82	Boulder 79 Rocky Flats 72 NCAR;
1999	Feb 02	1848-1015	103	Rocky Flats, 97 Boulder, 93 NCAR; extensive damage; Chinook windstorm
1999	Feb 07	0030-1200	90	NCAR Chinook winds
1999	Feb 17	2125-0030	90	CU campus; 79 NCAR: bora winds
1999	Feb 22	0515-1530	80	NCAR 75 Rocky Flats; bora
1999	Feb 22	1815-0310	82	Rocky Flats; 80 NCAR; 75 CU campus localized Chinook
1999	Jun 06	0510-0600	87	CU campus
1999	Nov 18	0545-1500	81	NCAR: winds over a large region
1999	Nov 25	0300-0950	77	NCAR Chinook winds
1999		2230-0935	72	NCAR Chinook winds redeveloped
1999	Dec 15	0200-1500	77	NCAR: strong upper level jet
1999	Dec 16	0100-0830	83	NCAR
1999	Dec 18	1145-1400	72	NCAR

2000

Year	Date(s)	Time of day	Gusts	Comments
2000	Jan 3	2300-0800	81	NCAR
2000	Feb 25	0500-1630	84	Rocky Flats Environmental Test Facility
2000	Mar 5	2000-0300	88	NCAR, 82 Boulder
2000	Mar 7	2300-0930	92	South Boulder 100 NWTC, 101 Rocky Flats Environmental Test facility; some damage
2000	Apr 5	1845	83	NCAR
2000	Apr 18	1700	71	NCAR
2000	May 17	1300-1900	88	NWTC, 84 Boulder, 80 NCAR; winds along with intense surface low
2000	June 19	05:53 PM	58kts	Dry Microburst Broomfield 68 NWTC
2000	August 1	08:50 PM	60kts	Thunderstorm Wind Boulder
2000	Sep 29	04:51 PM	60kts	Thunderstorm Wind Boulder
2000	Dec 15	0900 1000	72	NCAR
2000	Dec 16	0454-2300	72	NCAR

2001

Year	Date(s)	Time of day	Gusts	Comments
2001	Feb 04	2300-0130	75	CU campus
2001	Jun 13	0100-0200	76	NCAR 72, Southern hills middle school
2001	Oct 31	1558-2200	74	NCAR

2002

Year	Date(s)	Time of day	Gusts	Comments
2002	Jan 12	1820-2155	82	High winds Boulder at NCAR
2002	Jan 19	0100-0455	74	NCAR
2002	Feb 8	1745-2230	75	NCAR high winds

2003

Year	Date(s)	Time of day	Gusts	Comments
2003	Jan 19	0600	75	Rocky Flats Natl Wind Tech Center
2003	Jan 30	0100-1600	75	Boulder : covered large region
2003	Feb 09	1800-1133	73	Rocky Flats Natl Wind tech center
2003	Mar 05	2325-1205	85	US cam; 70 Natl Wind Tech Center

2004

Year	Date(s)	Time of day	Gusts	Comments
2004	Mar 06	01:55-12:00	78kts	3 miles S Boulder: downslope winds: front range
2004	Jun 10	16:25-10:30	82	NCAR downslope winds near Boulder: 82 NWTC
2004	Oct 29	11:48-15:00	73kts	??? Below 6000'
2004	Dec 20	12:30-12:30PM	95	very damaging downslope winds Front Range to Plains. roof damage, power

2005

Year	Date(s)	Time of day	Gusts	Comments
2005	Nov 14	14:50-17:50	91	Sugarloaf RAWS: locally strong winds
2005	Dec 05	06:42-18:39	90	NCAR. 98 Eldorado Springs. Front Range from Golden north. Major damage and power outages

2006

Year	Date(s)	Time of day	Gusts	Comments
2006	Jan 03	14:30-17:10	75-91	Rocky Flats. Local high winds.
2006	Jan 18	03:52-05:30	80mph	80mph 2 miles SE Boulder, 81 in Superior. Grass fire started and spread near Plainview at 93 and 72 and spread quickly due to very dry conditions.
2006	Feb 06	06:27-13:34	92	Wind Technology Center. Brief high winds toward Golden.

2007

Year	Date(s)	Time of day	Gusts	Comments
2007	Jan 07	18:00-12:00pm	77-115 .	Many highways closed. Blowing/drifting snow. Intense upper level jet and a strong pressure gradient. strong gusts Mountains.
2007	Feb 16	02:00-17:00	101	Natl. Wind Center. Roads closed from blowing snow. Largescale winds from Berthoud Pass to front range. 101m
2007	Jun 06	08:15-09:00	92	Boulder. 101 Carter Lake. Trees downed Frisco. From strong storm system.

2008

Year	Date(s)	Time of day	Gusts	Comments
2008	01/05	04:30 AM	78kts	High Winds
2008	01/25	19:20 PM	52kts	High Winds
2008	02/08	23:10 PM	70kts	High Winds
2008	11/13	00:00 AM	77kts	High Winds
2008	12/25	14:00 PM	70kts	High Winds
2008	12/29-30	21:06 PM	96kts	High Winds 2 days Chinook winds. 4th costliest wind event. 111 3 miles n of masonville.
2008	12/31	20:27 PM	77kts	High Winds

2009

Year	Date(s)	Time of day	Gusts	Comments
2009	01/01	00:00 AM	72kts	High Wind
2009	01/07	03:32 AM	93kts	High Winds: downslope winds; started 2 fires. peak near mt audabon 101
2009	01/27	23:10 PM	87kts	High Winds
2009	02/09	05:37 AM	70kts	High Winds
2009	02/17	09:00 AM	59kts	High Winds

2010

Year	Date(s)	Time of day	Gusts	Comments
2010	02/13	07:47 AM	89kts	High Wind 89 Winds ahead of a storm system
2010	05/04	03:30 AM	87kts	High Winds
2010	05/04	05:26 AM	65kts	High Winds
2010	05/24	10:04 AM	56kts	High Winds
2010	08/19		54kts	Thunderstorm High Winds

2011

Year	Date(s)	Time of day	Gusts	Comments
2011	06/30		56kts	Thunderstorm High Winds
2011	07/10		65kts	Thunderstorm High Winds
2011	11/12		69 gust	?
2011	11/12	10:30PM	89.5mph	?
2011	11/12	pre-dawn	68mph	?
2011	12/12	?	69mph	Mesa Lab
2011	12/12	22:30	89.5mph	Mesa Lab
2011	12/12	pre dawn	66mph	Mesa Lab

2012

Year	Date(s)	Time of day	Gusts	Comments
2012	1/3	pre dawn	60mph	Mesa Lab
2012	1/18	multiday	104mph	S Boulder, 83 Mesa Lab 95 Rocky Flats
2012	1/19	multiday	73mph	Mesa Lab, FootHills 73,43
2012	1/20	multiday	60mph	Mesa Lab
2012	2/22	all day	88mph	Mesa Lab;FL 93 Lyons
2012	3/4	0-10MST	81mph	81mph NIST Mesa Lab;FL NE Boulder gusts
2012	09/03		59kts	Thunderstorm High Wind
2012	10/17	20:05 AM	60kts	High Winds

2013

Year	Date(s)	Time of day	Gusts	Comments
2013	04/08	15:51 AM	61kts	High Wind
2013	09/18		57kts	Thunderstorm High Wind
2013	10/11		72kts	High Wind
2013	11/17		67kts	High Winds
2013	12/02		69kts	High Wind
2013	12/24		54kts	High Winds

2014

Year	Date(s)	Time of day	Gusts	Comments
2014	01/29		83kts	High Wind
2014	02/12		72kts	High Wind
2014	02/14		87kts	High Winds
2014	02/16		74kts	High Winds
2014	02/17		89kts	High Winds
2014	02/20		81kts	High Winds
2014	03/30		63kts	Thunderstorm High Winds
2014	03/31		85kts	High Wind
2014	11/25		75kts	High Winds

2015

Year	Date(s)	Time of day	Gusts	Comments
2015	01/05		92kts	High Winds
2015	01/16		75kts	High Winds
2015	11/18		87kts	High Winds

2016

Year	Date(s)	Time of day	Gusts	Comments
2016	12/25	afternoon		High Winds over Front Range area in afternoon. 110 Gold Hill. 90.4 Boulder NCAR Mesa Lab. 92 Rocky Flats (NREL).

2017-2018

Year	Date(s)	Time of day	Gusts	Comments
2017	01/09	early morning	87	High winds developed in and near the Front Range Foothills. Peak wind gusts included: 90 , 3 miles north-northeast of Pleasant View; 88 , 3 miles west-southwest of Louisville; 87 , 2 miles south of Gold Hill; 79 at the NCAR Mesa Laboratory; 76 at Glen Haven; 60 in Littleton and 58 in Arvada. Scattered outages affected approximately 2,400 customers in Boulder and Jefferson Counties. In Berthoud, strong winds destroyed a barn.
2017	02/09-10		86kts above 6000-9000'; 61kts below	Hurricane force winds toppled trees and knocked over several semis in and near the Front Range Mountains and Foothills. The Colorado Department of Transportation shut down Interstate 70 in both directions for a short time late between Beaver Brook and Silverthorne. Several trucks had been blown over and some cars received shattered windshields. High-profile vehicles and semi-trucks were barred from that area of the interstate until the wind weakened. Two trucks also rolled over on I-70 in Georgetown. The wind toppled dozens of trees near Estes Park and Glen Haven. In Glen Haven, two sheds and several decks were damaged by fallen trees. Downed power lines caused scattered electrical outages in Boulder and Larimer Counties. Nearly four thousand residents in Boulder County were left without power. The temperature in Denver reached 80 degrees. It was the first 80 degree temperature recorded in the month of February and established the all-time record for the month. The high wind and extremely warm temperatures helped to spread three grassfires in Boulder and Larimer Counties; no homes were damaged or lost. Intense wind gusts on the 10th caused power outages and damage to trees, fences and power lines across Boulder County. Blowing dirt reduced visibilities to a quarter-of-a-mile at times. A strong burst of wind uprooted trees, and knocked down an entire row of power poles and lines near Main Street and Pike Road in Longmont. The downed lines damaged a vehicle at one residence. Another resident had to be rescued when he was trapped in his car by downed electrical lines.
2017	03/07	morning	65kts	High winds continued across portions of the north central mountains and Foothills. Strong winds blew over a semi-tractor trailer on Interstate 25 near the Wyoming border, no injuries were reported. Peak wind gusts included: 81 at Berthoud Pass and Genesee; 78 at Loveland Pass and 75 near Glen Haven and Jamestown. The high winds and very dry conditions continued across the northeast plains of Colorado. In west Greeley, a building under construction completely collapsed. The 5,000 square-foot addition to a church swayed under the force of the wind then collapsed. Some of the debris pinned a construction worker; he suffered minor injuries. Peak wind gusts included: 66 , 4 miles southwest of Sterling; 64 at Briggsdale and Crook; 63 , 8 miles south of Holyoke; 62 , 8 miles south-southwest of Grover; 60 , 2 miles south-southeast of Denver International Airport; 58 at Akron Municipal Airport and 55 at Greeley Airport.
2017	10/31	evening	70kts	High Winds over Front Range. In Boulder area, 6000-9000: Peak wind gusts included: 96 near Georgetown, 93 near Berthoud Pass, 81 near Georgetown, 80 near Aspen Springs and Blackhawk, 78 near Gold Hill, 76 near Floyd Hill, with 75 near Dumont.
2017	11/01		81kts	Strong downslope winds continued across portions of the Front Range Mountains and Foothills on the 1st. Peak wind gusts included: 92 near Berthoud Pass, 88 near Gold Hill, 85 at Aspen Springs and 77 near Blackhawk.
2017	12/29		85kts	High winds developed in the Front Range mountains and foothills. Peak wind gust reports included: 98 , 2 miles south-southeast of Gold Hill, 91 , 3 miles south of Gold Hill; 89 near Aspen Springs; 86 , 4 miles east-northeast of Nederland; 83 , 3 miles southwest of Jefferson; 78 near Dumont; 77 near Rocky Flats; with 75 near Aspen Springs.
2017	12/30		72kts	Winds continue. Boulder county 6000-9000. Locally strong wind gusts occurred in the Front Range mountains and foothills. Peak wind reports included 99 near Berthoud Pass and 83 near Glen Haven.

2018

Year	Date(s)	Time of day	Gusts	Comments
2018	01/30	evening	80	A system that moved over the Pacific Northwest and across the Northern Rockies brought a period of high winds to areas in and near the Front Range Foothills. Peak wind gusts included: 101 atop Berthoud Pass; 97 near Loveland Pass and 2 miles south-southeast of Gold Hill; 80 at the NCAR Mesa Lab southwest of Boulder and 2 miles southwest of Rocky Flats; and 75 , 4 miles east-northeast of Nederland. The high winds also toppled a large tree at the mouth of Boulder Canyon.
2018	02/18	e	85kts	Boulder county: 6000-9000. Very strong winds developed over portions of the Front Range mountains and foothills. Peak wind gusts included: 98 , 2 miles south-southeast of Gold Hill, 86 atop Berthoud Pass, 83 atop Peak 8 at Breckenridge Ski Area with 75 mph, 3 miles east of Gold Hill.

2019

Year	Date(s)	Time of day	Gusts	Comments
2019	2/13	04:45-21:30	74 kts	Storm system brought winds. 88pmh 3 miles SW Rocky Flats.
2019	6/27	04:45-21:30	44 kts	Thunderstorm near Boulder airport.
2019	10/20	12:00-16:00	68 kts	TStorm System brought snow and high winds. 82 3 miles SW Rocky Flats
2019	11/29-30	20:00-18:00	96 kts	high winds at 6000-9000. Includes 107mph top of Eldora. 75mph NCAR. Extremely strong and widespread winds blew down many trees and closed roads.

2020

Year	Date(s)	Time of day	Gusts	Comments
2020	01/04-05	22:00-0048	72 kts	Bora in and near Foothills. 83mph Mesa Lab
2020	01/06	22:00-0048	68 kts
2020	01/07	22:00-0048	87 kts	83mph at Mesa Lab
2020	01/17	11:00-0002	66 kts	78mph at Mesa Lab
2020	06/06	14:40	52 kts	Thunderstorm in Louisville

2021

Year	Date(s)	Time of day	Gusts	Comments
2021	01/03		56kts	64mph Rocky Mountain Metro Airport, 80mph near Marshall. From a cold front.
2021	11/14	17:53	70kts	Intense but very localized winds developed near the foothills of northern Jefferson and southern Boulder counties. Peak wind gusts included: 81 mph at the NCAR Mesa Lab, 2 miles southwest of Boulder; 80 mph at White Ranch Open Space, and 79 mph at the mouth of Coal Creek Canyon at the junction of CO72/CO93.
2021	12/15/21	08:00-17:00	81kts Rocky Flats	Peak wind gusts included: 93 mph near Louisville, 89 mph at Rocky Mountain Metro Airport, 85 mph in southwest Arvada and 79 mph near Marshall. Also, Boulder 91mph. Broomfield 89mph. Nederland 79mph. Longmont 66mph. It was associated with a powerful cold front and bora winds.
2021	12/30-21	08:00-18:30 MST-7	115mph Arvada	Extremely strong winds in Boulder and to east. 110 Rocky Flats. 103 White Ranch Open Space. 108 SSW Boulder. 90mph Marshal, 98 Wind Technology Center, 75mph Boulder. Large grass fire developed from Marshall. 1094 houses plus some commercial structures were destroyed by the fire.

 

Number of Days with winds greater or equal to 70mph

Year	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88	89	90	91	92	93	94	95	96	97	98	99	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	A	B
Jan	2	3	1	8			4	1						7	4	1		1	2	1	3	4		1				3			4	1		2	2			2	1	1	3			2		1	2		1	1		4			73	30
Feb		3						1			1							3		4		1						1			4	1	1	1	1			1	1	1	1	1		1		5				1					32	20
Mar	1												3	4	2		1	1			1		2									2			1	1								1		2			1						23	14
Apr							2							1		1		2	1						2			3				3																							15	8
May																		2		1					1							1										1													6	5
Jun	1							1																	1				1*		1		1			1			1																8	8
Jul															1																												1												2	2
Aug										1				1																																									2	2
Sep																		1		1																																			2	2
Oct				1			1										1					1						1					1			1									1				1		1				10	10
Nov		4			1		1		2	1						1		1			1				1	1	3										1			1			1		1	1	1		1		2				26	19
Dec	2	2		1			2		7	3				3	4	2	1		3	2		3		2	1	1		6	1	1	3	2				1	1			4			1		1			1	2				2		63	29
Total	6	3		10	1		10	3	9	5	1		3	16	11	5	3	11	6	9	5	9	2	3	6	2	3	14	2	1	12	10	3	3	4	4	2	3	3	7	4	2	3	3	9	3	3	1	6	2	3	4	2		262	151
Year	69	70	71	72	73	74	75	76	77	78	79	80	81	82	83	84	85	86	87	88	89	90	91	92	93	94	95	96	97	98	99	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	A	B

A: Number of documented events >=70mph per month
B: Number of years with at least one day >=70mph documented in a month

Boulder, CO Wind Roses

Wind roses for Boulder by month that show the prevailing wind directions and speeds. Provided by the National Resource Conservation Service.

Jan	Feb	Mar	Apr	May	Jun
Jul	Aug	Sep	Oct	Nov	Dec

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