Alert archive / Colorado / High Wind Watches in 2021
High Wind Watch 6, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this high wind watch at Dec 4, 2021, 2:49 AM MST for 10 counties in Colorado. It took effect at Dec 5, 2021, 2:00 AM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 4, 2021, 2:49 AM MST (09:49 UTC)
- In effect from
- Dec 5, 2021, 2:00 AM MST
- Expired
- Dec 4, 2021, 2:41 PM MST
- In force
- 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 09:50 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 00:00Z, 9.8 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
- 2312 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
583 WWUS75 KBOU 040949 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 249 AM MST Sat Dec 4 2021 COZ033>036-041800- /O.NEW.KBOU.HW.A.0006.211205T0900Z-211205T1800Z/ 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 Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 249 AM MST Sat Dec 4 2021 ...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING... * WHAT...West winds 25 to 40 mph with gusts up to 80 mph possible. * WHERE...Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 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 and South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet Counties. * WHEN...From late tonight through Sunday morning. * IMPACTS...Damaging winds could blow down trees and power lines. A few power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. 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 RPK
2 follow-up statements
941 WWUS75 KBOU 041823 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 1123 AM MST Sat Dec 4 2021 COZ033>036-050000- /O.CON.KBOU.HW.A.0006.211205T0900Z-211205T1800Z/ 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 Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 1123 AM MST Sat Dec 4 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY MORNING... * WHAT...West winds 25 to 40 mph with gusts up to 80 mph possible. * WHERE...Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 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 and South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet Counties. * WHEN...From late tonight through Sunday morning. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. 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 RJK
343 WWUS75 KBOU 042141 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 241 PM MST Sat Dec 4 2021 COZ033>036-050945- /O.UPG.KBOU.HW.A.0006.211205T0900Z-211205T1800Z/ /O.NEW.KBOU.HW.W.0008.211205T0600Z-211205T1800Z/ 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 Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 241 PM MST Sat Dec 4 2021 ...HIGH WIND WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 AM MST SUNDAY... * WHAT...West winds 25 to 40 mph with gusts up to 80 mph possible. * WHERE...Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 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 and South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet Counties. * WHEN...From 11 PM this evening to 11 AM MST Sunday. * IMPACTS...Damaging winds may blow down trees and power lines. Power outages are possible. Gusty winds will blow around unsecured objects and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 Danielson
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 4, 2:41 PM MST | High Wind Warning | BOU | Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more | 20 hr |
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.