Alert archive / Colorado / High Wind Warnings in 2021

High Wind Warning 11, NWS Denver/Boulder, CO

December 26, 20216 counties in Colorado

NWS Denver/Boulder, CO issued this high wind warning at Dec 26, 2021, 3:08 AM MST for 6 counties in Colorado. It took effect at Dec 26, 2021, 11:00 AM MST. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 26, 2021, 3:08 AM MST (10:08 UTC)
In effect from
Dec 26, 2021, 11:00 AM MST
Expired
Dec 26, 2021, 5:00 PM MST
In force
6 hr
Issued by
NWS Denver/Boulder, CO

Counties Adams County, CO, Arapahoe County, CO, Douglas County, CO, Elbert County, CO, Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 50 km from the middle of the area, began a volume at 10:10 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, 10.1 hours before the alert went out and 82 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.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2021-12-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2021-12-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2917 m above ground
0-6 km bulk shear
107 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

157 
WWUS75 KBOU 261008
NPWBOU

URGENT - WEATHER MESSAGE
National Weather Service Denver CO
308 AM MST Sun Dec 26 2021

COZ041-045>047-049-270000-
/O.NEW.KBOU.HW.W.0011.211226T1800Z-211227T0000Z/
Elbert/Central and East Douglas Counties Above 6000 Feet-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-Washington County-
Including the cities of Hugo, Castle Rock, Cope, Punkin Center,
Elbert, Karval, Bennett, Matheson, Otis, Limon, Kiowa, Larkspur,
Deer Trail, Agate, Byers, Fondis, Forder, Last Chance, Kutch,
Leader, and Akron
308 AM MST Sun Dec 26 2021

...HIGH WIND WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 PM MST 
THIS AFTERNOON...

* WHAT...Southwest winds 25 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...North and Northeast Elbert County Below 6000 Feet/North 
  Lincoln County, Southeast Elbert County Below 6000 Feet/South 
  Lincoln County, Central and East Adams and Arapahoe Counties, 
  Elbert/Central and East Douglas Counties Above 6000 Feet and 
  Washington County Counties.

* WHEN...From 11 AM this morning to 5 PM MST this afternoon.

* IMPACTS...Blowing dust will reduce visibility, especially near 
  open fields.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

Persons with respiratory problems should make preparations to stay 
indoors until the storm passes. Be ready for a sudden drop in 
visibility to near zero. If you encounter blowing dust or blowing 
sand 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

Barjenbruch
1 follow-up statement
738 
WWUS75 KBOU 270005
NPWBOU

URGENT - WEATHER MESSAGE
National Weather Service Denver CO
505 PM MST Sun Dec 26 2021

COZ041-045>047-049-270115-
/O.EXP.KBOU.HW.W.0011.000000T0000Z-211227T0000Z/
Elbert/Central and East Douglas Counties Above 6000 Feet-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-Washington County-
Including the cities of Hugo, Castle Rock, Cope, Punkin Center,
Elbert, Karval, Bennett, Matheson, Otis, Limon, Kiowa, Larkspur,
Deer Trail, Agate, Byers, Fondis, Forder, Last Chance, Kutch,
Leader, and Akron
505 PM MST Sun Dec 26 2021

...HIGH WIND WARNING HAS EXPIRED...

The threat has ended. There can still be a few higher gusts up to 50 
but expect a gradual decrease in the winds this evening.

$$

For more information from the National Weather Service, visit 
https://weather.gov/bou

Entrekin

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 26, 1:33 PM MSTSnow Squall WarningBOUGrand57 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.