Alert archive / Colorado / High Wind Watches in 2021
High Wind Watch 8, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this high wind watch at Dec 13, 2021, 2:20 PM MST for 19 counties in Colorado. It took effect at Dec 15, 2021, 10:00 AM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 13, 2021, 2:20 PM MST (21:20 UTC)
- In effect from
- Dec 15, 2021, 10:00 AM MST
- Expired
- Dec 14, 2021, 4:34 AM MST
- In force
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Park County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 22 km from the middle of the area, began a volume at 21:18 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.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 9.3 hours before the alert went out and 99 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
- 3082 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- -44 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
811 WWUS75 KBOU 132120 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 220 PM MST Mon Dec 13 2021 COZ035>042-044>051-141200- /O.NEW.KBOU.HW.A.0008.211215T1700Z-211216T0000Z/ 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-Central and Southeast Park County-Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Morgan County-Central and East Adams and Arapahoe Counties-North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Southeast Elbert County Below 6000 Feet/South Lincoln County-Logan County-Washington County- Sedgwick County-Phillips County- Including the cities of Wiggins, Fort Morgan, Deer Trail, Hartsel, Karval, Elbert, Westcreek, Hugo, Arvada, Central City, Red Feather Lakes, Julesburg, Larkspur, Agate, Bailey, Leader, Evergreen, Georgetown, Glendevey, Pawnee Buttes, Nederland, Crook, Aurora, Fairplay, Littleton, Amherst, Sterling, Akron, Last Chance, Sedgwick, Raymer, South Park, Byers, Boulder, Highlands Ranch, Cope, City of Denver, Ovid, Matheson, Loveland, Peetz, Kiowa, Grover, Estes Park, Longmont, Fondis, Forder, Kutch, Denver International Airport, Haxtun, Goodrich, Golden, Parker, Castle Rock, Lakewood, Briggsdale, Stoneham, Fort Collins, Bennett, Otis, Punkin Center, Holyoke, Nunn, Idaho Springs, Brush, Lake George, Limon, Hereford, Merino, and Brighton 220 PM MST Mon Dec 13 2021 ...HIGH WIND WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY AFTERNOON... * WHAT...West winds 30 to 40 mph with gusts over 60 mph on the plains, and in the foothills 40 to 50 mph with gusts over 75 mph. * WHERE...Foothills and plains * WHEN...From Wednesday morning through Wednesday afternoon. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. Blowing dust will reduce visibility to less than a quarter mile in places. * ADDITIONAL DETAILS...Strong winds and low humidity will create critical fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Hanson
2 follow-up statements
429 WWUS75 KBOU 132131 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 231 PM MST Mon Dec 13 2021 COZ043-141215- /O.EXA.KBOU.HW.A.0008.211215T1700Z-211216T0000Z/ Central and South Weld County- Including the cities of Fort Lupton, Greeley, Eaton, and Roggen 231 PM MST Mon Dec 13 2021 ...HIGH WIND WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY AFTERNOON... * WHAT...West winds 30 to 40 mph with gusts over 60 mph on the plains. * WHERE...Central and South Weld County County. * WHEN...From Wednesday morning through Wednesday afternoon. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. Blowing dust will reduce visibility to less than a quarter mile in places. * ADDITIONAL DETAILS...Strong winds and low humidity will create critical fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ COZ035>042-044>051-141215- /O.CON.KBOU.HW.A.0008.211215T1700Z-211216T0000Z/ 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-Central and Southeast Park County-Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Morgan County-Central and East Adams and Arapahoe Counties-North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Southeast Elbert County Below 6000 Feet/South Lincoln County-Logan County-Washington County- Sedgwick County-Phillips County- Including the cities of Wiggins, Fort Morgan, Deer Trail, Hartsel, Karval, Elbert, Westcreek, Hugo, Arvada, Central City, Red Feather Lakes, Julesburg, Larkspur, Agate, Bailey, Leader, Evergreen, Georgetown, Glendevey, Pawnee Buttes, Nederland, Crook, Aurora, Fairplay, Littleton, Amherst, Sterling, Akron, Last Chance, Sedgwick, Raymer, South Park, Byers, Boulder, Highlands Ranch, Cope, City of Denver, Ovid, Matheson, Loveland, Peetz, Kiowa, Grover, Estes Park, Longmont, Fondis, Forder, Kutch, Denver International Airport, Haxtun, Goodrich, Golden, Parker, Castle Rock, Lakewood, Briggsdale, Stoneham, Fort Collins, Bennett, Otis, Punkin Center, Holyoke, Nunn, Idaho Springs, Brush, Lake George, Limon, Hereford, Merino, and Brighton 231 PM MST Mon Dec 13 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY AFTERNOON... * WHAT...West winds 30 to 40 mph with gusts over 60 mph on the plains, and in the foothills 40 to 50 mph with gusts over 75 mph. * WHERE...Portions of central, east central, north central, and northeast Colorado. * WHEN...From Wednesday morning through Wednesday afternoon. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. Blowing dust will reduce visibility to less than a quarter mile in places on the plains. * ADDITIONAL DETAILS...Strong winds and low humidity will create critical fire weather conditions on the plains. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Hanson
759 WWUS75 KBOU 141134 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 434 AM MST Tue Dec 14 2021 COZ035>039-142215- /O.UPG.KBOU.HW.A.0008.211215T1700Z-211216T0000Z/ /O.NEW.KBOU.HW.W.0010.211215T1500Z-211216T0000Z/ 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-Central and Southeast Park County-Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- Including the cities of Hartsel, Westcreek, Arvada, Central City, Red Feather Lakes, Bailey, Evergreen, Georgetown, Glendevey, Nederland, Fairplay, South Park, Boulder, Loveland, Estes Park, Longmont, Golden, Lakewood, Fort Collins, Nunn, Idaho Springs, Lake George, and Hereford 434 AM MST Tue Dec 14 2021 ...HIGH WIND WARNING IN EFFECT FROM 8 AM TO 5 PM MST WEDNESDAY... * WHAT...West winds 30 to 50 mph with gusts reaching 60 to 80 mph. Wind prone areas in and near the foothills may see gusts near 100 mph. * WHERE...South Park, Northern and Southern Foothills, Jefferson County, Northwest Weld County, Larimer and Boulder Counties Below 9000 Feet and Broomfield County. * WHEN...From 8 AM to 5 PM MST Wednesday. * IMPACTS...Damaging winds may blow down trees and power lines. Widespread power outages will be possible. Travel will be difficult, especially for high profile vehicles. Gusty winds will blow around unsecured objects. Blowing dust will reduce visibility to less than a quarter mile in places. * ADDITIONAL DETAILS...Strong winds and low humidity will create critical fire weather conditions on the plains. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain in the lower levels of your home during the windstorm, and avoid windows. Watch for falling debris and tree limbs. Use caution if you must drive. If you encounter blowing dust on the roadway or see it approaching, pull off the road as far as possible and put your vehicle in park. Turn the lights all the way off and keep foot off the brake pedal. Remember, 'Pull Aside, Stay Alive'. && $$ COZ040>051-142215- /O.UPG.KBOU.HW.A.0008.211215T1700Z-211216T0000Z/ /O.NEW.KBOU.HW.W.0010.211215T1500Z-211216T0000Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet-Northeast Weld County-Central and South Weld County-Morgan County-Central and East Adams and Arapahoe Counties-North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Southeast Elbert County Below 6000 Feet/South Lincoln County-Logan County-Washington County- Sedgwick County-Phillips County- Including the cities of Wiggins, Pawnee Buttes, Elbert, Hugo, Roggen, Forder, Julesburg, Larkspur, Agate, Briggsdale, Leader, Sterling, Fort Morgan, City of Denver, Crook, Aurora, Littleton, Amherst, Akron, Sedgwick, Raymer, Brighton, Highlands Ranch, Fort Lupton, Cope, Ovid, Matheson, Peetz, Kiowa, Grover, Eaton, Deer Trail, Byers, Fondis, Kutch, Denver International Airport, Haxtun, Last Chance, Parker, Castle Rock, Goodrich, Stoneham, Karval, Greeley, Bennett, Otis, Punkin Center, Holyoke, Brush, Limon, and Merino 434 AM MST Tue Dec 14 2021 ...HIGH WIND WARNING IN EFFECT FROM 8 AM TO 5 PM MST WEDNESDAY... * WHAT...West winds 30 to 50 mph with gusts reaching 60 to 80 mph. * WHERE...Portions of east central and northeast Colorado. * WHEN...From 8 AM to 5 PM MST Wednesday. * IMPACTS...Damaging winds may blow down trees and power lines. Widespread power outages will be possible. Travel will be difficult, especially for high profile vehicles. Gusty winds will blow around unsecured objects. Blowing dust will reduce visibility to less than a quarter mile in places. * ADDITIONAL DETAILS...Strong winds and low humidity may create critical fire weather conditions on the plains. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain in the lower levels of your home during the windstorm, and avoid windows. Watch for falling debris and tree limbs. Use caution if you must drive. If you encounter blowing dust on the roadway or see it approaching, pull off the road as far as possible and put your vehicle in park. Turn the lights all the way off and keep foot off the brake pedal. Remember, 'Pull Aside, Stay Alive'. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Meier
Nearby
High Wind Watches in Colorado, 2021Every high wind watch in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.