Alert archive / Colorado / High Wind Warnings in 2021
High Wind Warning 12, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this high wind warning at Dec 29, 2021, 1:36 PM MST for 11 counties in Colorado. It took effect at Dec 30, 2021, 5:00 AM MST. It was in force for 15 hr. 60 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
- Dec 29, 2021, 1:36 PM MST (20:36 UTC)
- In effect from
- Dec 30, 2021, 5:00 AM MST
- Expired
- Dec 30, 2021, 7:38 PM MST
- In force
- 15 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Broomfield 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, Weld County, CO
The radar
The Denver radar (KFTG), 78 km from the middle of the area, began a volume at 20:34 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 |
|---|---|---|---|
| Dec 30, 6:56 AM MST | NON-TSTM WND GST 85 | 1 N Glen Haven, CO | MESONET STATION EW4490 GLEN HAVEN. |
| Dec 30, 7:46 AM MST | NON-TSTM WND GST 71 | 3 Wnw Mishawaka, CO | MESONET STATION EW0853 LIVERMORE. |
| Dec 30, 7:48 AM MST | NON-TSTM WND GST 63 | 5 S Lyons, CO | MESONET STATION EW8833 LONGMONT. |
| Dec 30, 8:17 AM MST | NON-TSTM WND GST 90 | 1 N Glen Haven, CO | |
| Dec 30, 8:27 AM MST | NON-TSTM WND GST 89 | 1 N Glen Haven, CO | MESONET STATION EW4490 GLEN HAVEN. |
| Dec 30, 8:29 AM MST | NON-TSTM WND GST 70 | 3 Ese Pinecliffe, CO | MESONET STATION FW8937 WONDERVU. |
| Dec 30, 8:30 AM MST | NON-TSTM WND GST 64 | 3 Ene Nederland, CO | MESONET STATION FW1761 NEDERLAND. |
| Dec 30, 8:30 AM MST | NON-TSTM WND GST 70 | 1 Ne Crisman, CO | MESONET STATION EW4338 1 NE CRISMAN. |
| Dec 30, 8:33 AM MST | NON-TSTM WND GST 60 | 2 Nne Ward, CO | MESONET STATION CW5038 WARD. |
| Dec 30, 8:36 AM MST | NON-TSTM WND GST 79 | 3 Ssw Rocky Flats, CO | MESONET STATION FW2847 ARVADA. |
| Dec 30, 8:39 AM MST | NON-TSTM WND GST 72 | 3 Sw Rocky Flats, CO | MESONET STATION CO109 ROCKY FLATS HWY 93 AND 72. |
| Dec 30, 8:45 AM MST | NON-TSTM WND GST 64 | 2 Nnw Marshall, CO | MESONET STATION BLD01 BOULDER SOUTH WEST. |
| Dec 30, 8:46 AM MST | NON-TSTM WND GST 59 | 2 S White Ranch Open Sp, CO | MESONET STATION EW1799 GOLDEN. |
| Dec 30, 8:46 AM MST | NON-TSTM WND GST 79 | 3 Wnw Mishawaka, CO | MESONET STATION EW0853 LIVERMORE. |
| Dec 30, 8:50 AM MST | NON-TSTM WND GST 63 | 1 Wsw Pleasant View, CO | MESONET STATION CO008 I-70 AT C470. |
| Dec 30, 9:00 AM MST | NON-TSTM WND GST 66 | 3 Ene Nederland, CO | MESONET STATION FW1761 NEDERLAND. |
| Dec 30, 9:00 AM MST | NON-TSTM WND GST 89 | 3 Sw Rocky Flats, CO | MESONET STATION CO109 ROCKY FLATS HWY 93 AND 72. |
| Dec 30, 9:01 AM MST | NON-TSTM WND GST 66 | 2 S White Ranch Open Sp, CO | MESONET STATION EW1799 GOLDEN. |
| Dec 30, 9:15 AM MST | NON-TSTM WND GST 59 | 1 Ssw Erie, CO | AWOS STATION KEIK ERIE MUNI. |
| Dec 30, 9:20 AM MST | NON-TSTM WND GST 92 | 1 Ne Crisman, CO | |
| Dec 30, 9:35 AM MST | NON-TSTM WND GST 63 | 1 Ene Berthoud Pass, CO | AWOS STATION K0CO BERTHOUD PASS. |
| Dec 30, 9:38 AM MST | NON-TSTM WND GST 65 | 4 Ene Nederland, CO | MESONET STATION DW5338 NEDERLAND. |
| Dec 30, 9:49 AM MST | NON-TSTM WND GST 64 | 2 Nnw Genesee, CO | MESONET STATION CO065 GENESEE. |
| Dec 30, 9:51 AM MST | NON-TSTM WND GST 105 | 3 Sw Rocky Flats, CO | MESONET STATION CO109 ROCKY FLATS HWY 93 AND 72. |
| Dec 30, 9:55 AM MST | NON-TSTM WND GST 58 | 3 Se Tolland, CO | AWOS STATION KC99 DAKOTA HILL. |
| Dec 30, 9:56 AM MST | NON-TSTM WND GST 72 | 3 Ese Pinecliffe, CO | MESONET STATION FW8937 WONDERVU. |
| Dec 30, 9:56 AM MST | NON-TSTM WND GST 97 | 3 Nne White Ranch Open, CO | MESONET STATION UP709 2.8 NE WHITE RANCH OPEN SPACE (UPR). |
| Dec 30, 10:00 AM MST | NON-TSTM WND GST 65 | 2 Nnw Marshall, CO | MESONET STATION BLD01 BOULDER SOUTH WEST. |
| Dec 30, 10:00 AM MST | NON-TSTM WND GST 70 | 2 Nnw Genesee, CO | MESONET STATION CO065 GENESEE. |
| Dec 30, 10:00 AM MST | NON-TSTM WND GST 100 | 3 Nne White Ranch Open, CO | MESONET STATION UP709 2.8 NE WHITE RANCH OPEN SPACE (UPR). |
| Dec 30, 10:01 AM MST | NON-TSTM WND GST 70 | 3 Se Niwot, CO | MESONET STATION FW3675 LAFAYETTE. |
| Dec 30, 10:09 AM MST | NON-TSTM WND GST 80 | 5 S Lyons, CO | MESONET STATION EW8833 LONGMONT. |
| Dec 30, 10:16 AM MST | NON-TSTM WND GST 69 | 4 Se Pinecliffe, CO | MESONET STATION EW8336 COAL CREEK CANYON. |
| Dec 30, 10:16 AM MST | NON-TSTM WND GST 81 | 3 Ssw Rocky Flats, CO | MESONET STATION FW2847 ARVADA. |
| Dec 30, 10:17 AM MST | NON-TSTM WND GST 61 | 3 E Pinewood Springs, CO | MESONET STATION GW0895 LYONS. |
| Dec 30, 10:42 AM MST | NON-TSTM WND GST 61 | 3 Se Boulder, CO | MESONET STATION EW3608 BOULDER. |
| Dec 30, 10:42 AM MST | NON-TSTM WND GST 70 | 3 W Lyons, CO | MESONET STATION BCFC2 LYONS 3W. |
| Dec 30, 10:45 AM MST | NON-TSTM WND GST 79 | 2 Nnw Marshall, CO | MESONET STATION BLD01 BOULDER SOUTH WEST. |
| Dec 30, 10:50 AM MST | NON-TSTM WND GST 71 | 2 Sw Boulder, CO | MESONET STATION ATC01 ATOC - UNIV. COLORADO CAMPUS. |
| Dec 30, 10:51 AM MST | NON-TSTM WND DMG | 1 Nnw Boulder, CO | REPORT FROM MPING: TREES UPROOTED OR SNAPPED;. |
| Dec 30, 11:00 AM MST | NON-TSTM WND GST 98 | 3 Nne White Ranch Open, CO | MESONET STATION UP709 2.8 NE WHITE RANCH OPEN SPACE (UPR). |
| Dec 30, 11:05 AM MST | NON-TSTM WND GST 62 | 3 E Pinewood Springs, CO | MESONET STATION GW0895 LYONS. |
| Dec 30, 11:16 AM MST | NON-TSTM WND GST 63 | 2 W Boulder, CO | MESONET STATION EW8078 BOULDER. |
| Dec 30, 11:16 AM MST | NON-TSTM WND GST 104 | 3 Ssw Rocky Flats, CO | MESONET STATION FW2847 ARVADA. |
| Dec 30, 11:17 AM MST | NON-TSTM WND GST 64 | 1 Nnw Boulder, CO | MESONET STATION FW9328 BOULDER. |
| Dec 30, 11:20 AM MST | NON-TSTM WND GST 102 | 1 Ne Crisman, CO | MESONET STATION EW4338 1 NE CRISMAN. |
| Dec 30, 11:23 AM MST | NON-TSTM WND GST 73 | 2 Ssw Boulder, CO | MESONET STATION CO040 036E03750RWS1RP1 AT BASELINE RD. |
| Dec 30, 11:23 AM MST | NON-TSTM WND GST 110 | 3 Sw Rocky Flats, CO | MESONET STATION CO109 ROCKY FLATS HWY 93 AND 72. |
| Dec 30, 11:34 AM MST | NON-TSTM WND GST 62 | Virginia Dale, CO | MESONET STATION CO036 VIRGINIA DALE. |
| Dec 30, 11:41 AM MST | NON-TSTM WND DMG | 2 N Golden, CO | REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF. |
| Dec 30, 11:45 AM MST | NON-TSTM WND GST 65 | 2 Nne Rocky Flats, CO | MESONET STATION RFN 1.7 NE ROCKY FLATS (CDPHE). |
| Dec 30, 11:47 AM MST | NON-TSTM WND GST 68 | 4 Sw Hygiene, CO | MESONET STATION DW1011 LONGMONT. |
| Dec 30, 11:54 AM MST | NON-TSTM WND DMG | 2 Ssw Rocky Flats, CO | REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF. |
| Dec 30, 11:55 AM MST | NON-TSTM WND GST 98 | 2 Nw Rocky Flats, CO | |
| Dec 30, 11:56 AM MST | NON-TSTM WND GST 62 | 3 E Pinewood Springs, CO | MESONET STATION GW0895 LYONS. |
| Dec 30, 11:58 AM MST | NON-TSTM WND GST 67 | 2 Wnw Brookvale, CO | MESONET STATION CEKC2 CORRAL CREEK. |
| Dec 30, 12:03 PM MST | NON-TSTM WND GST 107 | 3 Sw Rocky Flats, CO | MESONET STATION CO109 ROCKY FLATS HWY 93 AND 72. |
| Dec 30, 12:04 PM MST | NON-TSTM WND GST 60 | Floyd Hill, CO | MESONET STATION CO071 I-70 FLOYD HILL. |
| Dec 30, 12:06 PM MST | NON-TSTM WND GST 115 | 3 Ssw Rocky Flats, CO | MESONET STATION FW2847 ARVADA. |
| Dec 30, 12:12 PM MST | NON-TSTM WND GST 71 | 2 Nnw Genesee, CO | MESONET STATION CO065 GENESEE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 8.6 hours before the alert went out and 188 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
- 1757 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
775 WWUS75 KBOU 292036 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 136 PM MST Wed Dec 29 2021 COZ033-035-301800- /O.UPG.KBOU.HW.A.0009.211230T1200Z-211231T0600Z/ /O.NEW.KBOU.HW.W.0012.211230T1200Z-211231T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Glendevey, Nederland, Rocky Mountain National Park, Laramie and Medicine Bow Mountains, Red Feather Lakes, Cameron Pass, Estes Park, Willow Creek Pass, and Rabbit Ears Range 136 PM MST Wed Dec 29 2021 ...HIGH WIND WARNING IN EFFECT FROM 5 AM TO 11 PM MST THURSDAY... * WHAT...West winds 25 to 40 mph with gusts to 75 mph possible. * WHERE...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 5 AM to 11 PM MST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. 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. && $$ For more information from the National Weather Service, visit https://weather.gov/bou AD
5 follow-up statements
311 WWUS75 KBOU 300341 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 841 PM MST Wed Dec 29 2021 COZ033-035-301300- /O.CON.KBOU.HW.W.0012.211230T1200Z-211231T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Glendevey, Nederland, Rocky Mountain National Park, Laramie and Medicine Bow Mountains, Red Feather Lakes, Cameron Pass, Estes Park, Willow Creek Pass, and Rabbit Ears Range 841 PM MST Wed Dec 29 2021 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 5 AM TO 11 PM MST THURSDAY... * WHAT...West winds 25 to 40 mph with gusts to 75 mph possible. The strongest winds are expected to be between 8 am and 5 pm. * WHERE...Larimer and Boulder Counties Between 6000 and 9000 Feet and South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet Counties. * WHEN...From 5 AM to 11 PM MST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain in the lower levels of your home during the windstorm, and avoid windows. Watch for falling debris and tree limbs. Use caution if you must drive. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Entrekin
170 WWUS75 KBOU 301036 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 336 AM MST Thu Dec 30 2021 COZ036-038-039-301845- /O.EXB.KBOU.HW.W.0012.211230T1500Z-211231T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet-Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- Including the cities of Evergreen, Georgetown, Lakewood, Golden, Fort Collins, Westcreek, Arvada, Loveland, Central City, Longmont, Nunn, Idaho Springs, Bailey, Hereford, and Boulder 336 AM MST Thu Dec 30 2021 ...HIGH WIND WARNING IN EFFECT FROM 8 AM THIS MORNING TO 5 PM MST THIS AFTERNOON... * WHAT...West winds 25 to 40 mph with gusts up to 80 mph expected. * WHERE...Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet, Larimer County Below 6000 Feet/Northwest Weld County and Boulder and Jefferson Counties Below 6000 Feet/West Broomfield County Counties. * WHEN...From 8 AM this morning to 5 PM MST this afternoon. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Strongest winds below 6000 feet are expected to be near the base of the foothills from Boulder north to Fort Collins to the Wyoming border. 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. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ COZ033-035-301845- /O.CON.KBOU.HW.W.0012.211230T1200Z-211231T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Glendevey, Nederland, Rocky Mountain National Park, Laramie and Medicine Bow Mountains, Red Feather Lakes, Cameron Pass, Estes Park, Willow Creek Pass, and Rabbit Ears Range 336 AM MST Thu Dec 30 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...West winds 25 to 40 mph with gusts to 80 mph possible. The strongest winds are expected to be between 8 am and 5 pm. * WHERE...Larimer and Boulder Counties Between 6000 and 9000 Feet and South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet Counties. * WHEN...Until 11 PM MST this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain in the lower levels of your home during the windstorm, and avoid windows. Watch for falling debris and tree limbs. Use caution if you must drive. && $$ For more information from the National Weather Service, visit https://weather.gov/bou RPK
707 WWUS75 KBOU 302148 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 248 PM MST Thu Dec 30 2021 COZ033-035-310600- /O.CON.KBOU.HW.W.0012.000000T0000Z-211231T0600Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Glendevey, Nederland, Rocky Mountain National Park, Laramie and Medicine Bow Mountains, Red Feather Lakes, Cameron Pass, Estes Park, Willow Creek Pass, and Rabbit Ears Range 248 PM MST Thu Dec 30 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...West winds 25 to 40 mph with gusts to 80 mph. The strongest winds are expected to slowly diminish through the evening. * WHERE...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...Until 11 PM MST this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles. 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. && $$ COZ036-038-039-310000- /O.CON.KBOU.HW.W.0012.000000T0000Z-211231T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet-Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- Including the cities of Evergreen, Georgetown, Lakewood, Golden, Fort Collins, Westcreek, Arvada, Loveland, Central City, Longmont, Nunn, Idaho Springs, Bailey, Hereford, and Boulder 248 PM MST Thu Dec 30 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...West winds 25 to 40 mph with gusts up to 80 mph expected. The strongest winds earlier today peaked near 110 mph at the base of the foothills, but overall winds should gradually weaken through the evening hours. * WHERE...Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet, Larimer County Below 6000 Feet/Northwest Weld County and Boulder and Jefferson Counties Below 6000 Feet/West Broomfield County Counties. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Dangerous and life threatening wildfires will spread rapidly. Damaging winds will blow down trees and power lines. Scattered power outages are expected. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Strongest winds below 6000 feet are expected to be near the base of the foothills from Boulder north to Fort Collins to the Wyoming border. PRECAUTIONARY/PREPAREDNESS ACTIONS... Have a To- Watch for falling debris and tree limbs. Use caution if you must drive. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Barjenbruch
111 WWUS75 KBOU 302351 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 451 PM MST Thu Dec 30 2021 COZ033-035-310300- /O.EXT.KBOU.HW.W.0012.000000T0000Z-211231T0300Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Glendevey, Nederland, Rocky Mountain National Park, Laramie and Medicine Bow Mountains, Red Feather Lakes, Cameron Pass, Estes Park, Willow Creek Pass, and Rabbit Ears Range 451 PM MST Thu Dec 30 2021 ...HIGH WIND WARNING NOW IN EFFECT UNTIL 8 PM MST THIS EVENING... * WHAT...West winds 25 to 40 mph with gusts to 85 mph. The strongest winds are expected to slowly diminish by mid mid evening. * WHERE...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...Until 8 PM MST this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Strong west winds and low humidities will continue to cause the potential for rapid fire spread. 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. && $$ COZ036-038-039-310300- /O.EXT.KBOU.HW.W.0012.000000T0000Z-211231T0300Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet-Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- Including the cities of Evergreen, Georgetown, Lakewood, Golden, Fort Collins, Westcreek, Arvada, Loveland, Central City, Longmont, Nunn, Idaho Springs, Bailey, Hereford, and Boulder 451 PM MST Thu Dec 30 2021 ...HIGH WIND WARNING NOW IN EFFECT UNTIL 8 PM MST THIS EVENING... * WHAT...West winds 25 to 40 mph with gusts up to 80 mph expected. The strongest winds earlier today peaked near 110 mph at the base of the foothills, but overall winds should gradually weaken through the evening hours. * WHERE...Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet, Larimer County Below 6000 Feet/Northwest Weld County and Boulder and Jefferson Counties Below 6000 Feet/West Broomfield County Counties. * WHEN...Until 8 PM MST this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Strongest winds below 6000 feet are expected to be near the base of the foothills from Boulder north to Fort Collins to the Wyoming border. Strong west winds and low hudidities will continue to cause the potential for rapid fire spread. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain in the lower levels of your home during the windstorm, and avoid windows. Watch for falling debris and tree limbs. Use caution if you must drive. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. && $$ For more information from the National Weather Service, visit https://weather.gov/bou RJK
458 WWUS75 KBOU 310238 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 738 PM MST Thu Dec 30 2021 COZ033-035-036-038-039-310345- /O.CAN.KBOU.HW.W.0012.000000T0000Z-211231T0300Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder 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-Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- Including the cities of Westcreek, Rocky Mountain National Park, Arvada, Central City, Red Feather Lakes, Bailey, Evergreen, Georgetown, Glendevey, Nederland, Cameron Pass, Boulder, Longmont, Loveland, Estes Park, Rabbit Ears Range, Willow Creek Pass, Golden, Lakewood, Fort Collins, Nunn, Idaho Springs, Laramie and Medicine Bow Mountains, and Hereford 738 PM MST Thu Dec 30 2021 ...HIGH WIND WARNING IS CANCELLED... Winds have subsided in the foothills and adjacent plains, therefore the High Wind Warning is cancelled. $$ For more information from the National Weather Service, visit https://weather.gov/bou RJK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 29, 1:18 PM MST | Winter Storm Warning | BOU | Boulder, Broomfield, Clear Creek, Douglas, Gilpin, Grand and 6 more | 70 hr |
Nearby
High Wind Warnings in Colorado, 2021Every high wind warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.