Alert archive / Colorado / High Wind Warnings in 2017
High Wind Warning 11, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this high wind warning at Oct 31, 2017, 11:06 AM MDT for 10 counties in Colorado. It took effect at Oct 31, 2017, 9:00 PM MDT. It was in force for 24 hr. 13 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Oct 31, 2017, 11:06 AM MDT (17:06 UTC)
- In effect from
- Oct 31, 2017, 9:00 PM MDT
- Expired
- Nov 1, 2017, 8:30 PM MDT
- In force
- 24 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO
The radar
The Denver radar (KFTG), 94 km from the middle of the area, began a volume at 17:09 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 31, 9:12 PM MDT | NON-TSTM WND GST 93 | 1 E Berthoud Pass, CO | |
| Oct 31, 9:26 PM MDT | NON-TSTM WND GST 69 | 4 Ene Nederland, CO | |
| Oct 31, 9:30 PM MDT | NON-TSTM WND GST 80 | 1 Ne Aspen Springs, CO | |
| Oct 31, 10:39 PM MDT | NON-TSTM WND GST 75 | 1 N Georgetown, CO | |
| Oct 31, 10:59 PM MDT | NON-TSTM WND GST 81 | 1 N Georgetown, CO | |
| Oct 31, 11:29 PM MDT | NON-TSTM WND GST 75 | Dumont, CO | |
| Nov 1, 12:29 AM MDT | NON-TSTM WND GST 96 | 1 N Georgetown, CO | |
| Nov 1, 5:15 AM MDT | NON-TSTM WND GST 85 | Aspen Springs, CO | |
| Nov 1, 5:18 AM MDT | NON-TSTM WND GST 75 | 2 Nnw Glen Haven, CO | |
| Nov 1, 7:00 AM MDT | NON-TSTM WND GST 62 | 1 Wnw Loveland Pass, CO | |
| Nov 1, 8:53 AM MDT | NON-TSTM WND GST 92 | Berthoud Pass, CO | |
| Nov 1, 11:35 AM MDT | NON-TSTM WND GST 69 | 4 E Buckeye, CO | |
| Nov 1, 2:36 PM MDT | NON-TSTM WND GST 88 | 2 S Gold Hill, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 5.1 hours before the alert went out and 206 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 834 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
718 WWUS75 KBOU 311706 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 1106 AM MDT Tue Oct 31 2017 ...STRONG WINDS POSSIBLE IN THE MOUNTAINS AND FOOTHILLS WEDNESDAY... .Strong westerly flow aloft is expected over Wyoming and northern Colorado from later tonight through Wednesday. This will bring gusty winds to the mountain ridges and eastern slopes of the front range. Gusty winds will also spread over the foothills of Larimer, Boulder and Jefferson Counties. The gusty winds are expected to continue through the day and into Wednesday evening before diminishing. COZ033>036-010115- /O.UPG.KBOU.HW.A.0008.171101T0600Z-171102T0600Z/ /O.NEW.KBOU.HW.W.0011.171101T0300Z-171102T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, Winter Park, Estes Park, Glendevey, Nederland, Red Feather Lakes, Bailey, Central City, Evergreen, Georgetown, Idaho Springs, and Westcreek 1106 AM MDT Tue Oct 31 2017 ...HIGH WIND WARNING IN EFFECT FROM 9 PM THIS EVENING TO MIDNIGHT MDT WEDNESDAY NIGHT... The National Weather Service in Denver has issued a High Wind Warning, which is in effect from 9 PM this evening to midnight MDT Wednesday night. The High Wind Watch is no longer in effect. * TIMING...Winds will begin increasing late this evening. Gusty winds will continue through the day Wednesday and begin diminishing Wednesday evening. * WINDS...West winds 30 to 50 mph with gusts in excess 75 mph. * IMPACTS...Travel may become difficult over high mountain passes and along the Peak To Peak Highway due to crosswinds. Power outages will be possible from trees blowing onto power lines. Secure lightweight outdoor items to prevent them from blowing away. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means a hazardous high wind event is expected or occurring. Sustained wind speeds of at least 40 mph or gusts of 58 mph or more can lead to property damage. && $$ Hanson
5 follow-up statements
061 WWUS75 KBOU 010104 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 704 PM MDT Tue Oct 31 2017 ...STRONG WINDS LIKELY IN THE FRONT RANGE MOUNTAINS AND HIGHER FOOTHILLS TONIGHT THROUGH WEDNESDAY EVENING... .Strengthening northwest flow aloft and the presence of a well developed mountain wave will result in strong and potentially damaging westerly winds winds in the Front Range mountains and foothills starting this evening. Winds have already begun howling above timberline where gusts to around 80 mph have been recorded. The strong and gusty west winds will spread to lower areas of the Front Range overnight, with the strongest winds likely on the mountain ridges and foothill areas above 8000 feet in Larimer, Boulder, Clear Creek, Gilpin and Jefferson counties. Strongest winds are likely to occur late this evening through Wednesday morning. After some weakening around midday tomorrow, look for winds to strengthen again in these same areas and continue strong and gusty through Wednesday evening. COZ033>036-010915- /O.CON.KBOU.HW.W.0011.171101T0300Z-171102T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, Winter Park, Estes Park, Glendevey, Nederland, Red Feather Lakes, Bailey, Central City, Evergreen, Georgetown, Idaho Springs, and Westcreek 704 PM MDT Tue Oct 31 2017 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT... * TIMING...Winds will become strong and very gusty this evening, with speeds increasing after midnight. The strong and gusty winds are likely to continue through Wednesday evening. * WINDS...West winds 30 to 55 mph with gusts in excess 80 mph. * IMPACTS...Travel may become difficult over high mountain passes and along the Peak To Peak Highway due to powerful crosswinds. Power outages will be possible from trees blowing onto power lines. Secure lightweight outdoor items to prevent them from blowing away. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means a hazardous high wind event is expected or occurring. Sustained wind speeds of at least 40 mph or gusts of 58 mph or more can lead to property damage. && $$ Baker
626 WWUS75 KBOU 010116 CCA NPWBOU URGENT - WEATHER MESSAGE...CORRECTED National Weather Service Denver/Boulder CO 716 PM MDT Tue Oct 31 2017 ...STRONG WINDS LIKELY IN THE FRONT RANGE MOUNTAINS AND HIGHER FOOTHILLS TONIGHT THROUGH WEDNESDAY EVENING... .A powerful northwest flow aloft and the presence of a well developed mountain wave will result in strong and potentially damaging westerly winds in the Front Range mountains and foothills. Winds have already begun howling above timberline early this evening where gusts to around 80 mph have been recorded. These strong and gusty winds will spread to lower areas of the Front Range overnight, with the strongest winds likely in areas above 8000 feet in Larimer, Boulder, Clear Creek, Gilpin and Jefferson counties. Strongest winds are likely to occur from late this evening through Wednesday morning. The after some weakening during the day, winds are likely to strengthen again in these same areas and continue through Wednesday evening. COZ033>036-010915- /O.COR.KBOU.HW.W.0011.171101T0300Z-171102T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, Winter Park, Estes Park, Glendevey, Nederland, Red Feather Lakes, Bailey, Central City, Evergreen, Georgetown, Idaho Springs, and Westcreek 716 PM MDT Tue Oct 31 2017 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT WEDNESDAY NIGHT... * TIMING...Winds will become strong and quite gusty this evening, with speeds increasing after midnight. These strong and potentially damaging winds are likely to continue through Wednesday evening. * WINDS...West winds 30 to 55 mph with gusts in excess 80 mph. * IMPACTS...Travel may become difficult over high mountain passes and along the Peak To Peak Highway due to powerful crosswinds. Power outages will be possible from trees blowing onto power lines. Secure lightweight outdoor items to prevent them from blowing away. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means a hazardous high wind event is expected or occurring. Sustained wind speeds of at least 40 mph or gusts of 58 mph or more can lead to property damage. && $$ Baker
550 WWUS75 KBOU 010914 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 314 AM MDT Wed Nov 1 2017 ...STRONG WINDS CONTINUE ACROSS THE FRONT RANGE MOUNTAINS AND FOOTHILLS... .Powerful northwest flow aloft and the presence of a well developed mountain wave will result in strong and potentially damaging westerly winds in the Front Range mountains and foothills. Winds have already gusted into the 75 to 95 mph range in wind prone areas, including Berthoud Pass, the I-70 corridor through Georgetown, and in portions of the foothills west of Boulder. The winds in some areas may be quite variable and erratic at times, with light winds followed by sudden bursts of very strong and potentially damaging winds. That will also create hazardous and difficult driving conditions especially for drivers of high profile vehicles. The strongest winds during this windstorm will remain across the Front Range Mountains and Foothills, but gusty winds will also spread across the I-25 Corridor this morning, and then into portions of the eastern plains this afternoon. Fire danger will be elevated due to the strong winds. COZ033>036-011900- /O.CON.KBOU.HW.W.0011.000000T0000Z-171102T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, Winter Park, Estes Park, Glendevey, Nederland, Red Feather Lakes, Bailey, Central City, Evergreen, Georgetown, Idaho Springs, and Westcreek 314 AM MDT Wed Nov 1 2017 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... * TIMING...Strong and gusty winds will continue today, and then gradually relax this evening. * WINDS...West winds 30 to 55 mph with gusts in excess 80 mph in wind prone areas and above timberline. * IMPACTS...Travel will be hazardous over high mountain passes and along the Peak To Peak Highway due to powerful crosswinds. Drivers of high profile vehicles should avoid traveling I-70 west of Denver and Highway 40 over Berthoud Pass until winds subside later tonight. Power outages will be possible from trees blowing onto power lines. Fire danger will be elevated, so avoid outdoor burning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means a hazardous high wind event is expected or occurring. Sustained wind speeds of at least 50 mph or gusts of 75 mph or more can lead to property damage. && $$
120 WWUS75 KBOU 011830 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 1230 PM MDT Wed Nov 1 2017 ...STRONG WINDS CONTINUE ACROSS THE FRONT RANGE MOUNTAINS AND FOOTHILLS... .Powerful northwest flow aloft and the presence of a well developed mountain wave will result in strong and potentially damaging westerly winds in the Front Range mountains and foothills. Winds have already gusted into the 75 to 95 mph range in wind prone areas, including Berthoud Pass, the I-70 corridor through Georgetown, and in portions of the foothills west of Boulder. The winds in some areas may be quite variable and erratic at times, with light winds followed by sudden bursts of very strong and potentially damaging winds. That will also create hazardous and difficult driving conditions especially for drivers of high profile vehicles. The strongest winds during this windstorm will remain across the Front Range Mountains and Foothills, but gusty winds will spread across the I-25 Corridor and eastern plains through the afternoon. Fire danger will be elevated due to the strong winds. COZ033>036-020600- /O.CON.KBOU.HW.W.0011.000000T0000Z-171102T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, Winter Park, Estes Park, Glendevey, Nederland, Red Feather Lakes, Bailey, Central City, Evergreen, Georgetown, Idaho Springs, and Westcreek 1230 PM MDT Wed Nov 1 2017 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... * TIMING...Strong and gusty winds will continue today, and then gradually relax this evening. * WINDS...West winds 30 to 55 mph with gusts in excess 85 mph in wind prone areas and above timberline. * IMPACTS...Travel will be hazardous over high mountain passes and along the Peak To Peak Highway due to powerful crosswinds. Drivers of high profile vehicles should avoid traveling I-70 west of Denver and Highway 40 over Berthoud Pass until winds subside later tonight. Power outages will be possible from trees blowing onto power lines. Fire danger will be elevated, so avoid outdoor burning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means a hazardous high wind event is expected or occurring. Sustained wind speeds of at least 50 mph or gusts of 75 mph or more can lead to property damage. && $$
505 WWUS75 KBOU 020230 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 830 PM MDT Wed Nov 1 2017 COZ033>036-020330- /O.CAN.KBOU.HW.W.0011.000000T0000Z-171102T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, Winter Park, Estes Park, Glendevey, Nederland, Red Feather Lakes, Bailey, Central City, Evergreen, Georgetown, Idaho Springs, and Westcreek 830 PM MDT Wed Nov 1 2017 ...HIGH WIND WARNING IS CANCELLED... The National Weather Service in Denver has cancelled the High Wind Warning. Although strong winds will persist in the mountains above timberline overnight, they are not longer expected to reach warning criteria. Therefore the High Wind Warning for the Front Range Mountains and Foothills has been cancelled. For the rest of tonight, expect West winds 20 to 35 mph with gusts of 50 to 60 mph above timberline and along exposed eastern slopes. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 31, 4:41 AM MDT | High Wind Watch | BOU | Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more | 6 hr |
Nearby
High Wind Warnings in Colorado, 2017Every high wind warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.