Alert archive / Colorado / Snow Squall Warnings in 2021

Snow Squall Warning 4, NWS Pueblo, CO

December 15, 2021Las Animas County, Colorado

NWS Pueblo, CO issued this snow squall warning at Dec 15, 2021, 7:01 AM MST for Las Animas County, Colorado. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 15, 2021, 7:01 AM MST (14:01 UTC)
Expired: Dec 15, 2021, 7:45 AM MST
In force: 44 min
Issued by: NWS Pueblo, CO
Area: Storm-based polygon

County Las Animas County, CO

The radar

The Pueblo radar (KPUX), 160 km from the middle of the area, began a volume at 14:03 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

Albuquerq/Krtlnd, NM (KABQ), launched 12:00Z, 2.0 hours before the alert went out and 286 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 9 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1356 m above ground
0-6 km bulk shear: 89 kt
0-1 km storm-relative helicity: 401 m²/s²
0-3 km storm-relative helicity: 663 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

280 
WWUS55 KPUB 151401
SQWPUB

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Pueblo CO
701 AM MST Wed Dec 15 2021

COC071-151445-
/O.NEW.KPUB.SQ.W.0004.211215T1401Z-211215T1445Z/
Las Animas CO-
701 AM MST Wed Dec 15 2021

The National Weather Service in Pueblo has issued a

* Snow Squall Warning for...
  South central Las Animas County in southeastern Colorado...

* Until 745 AM MST.

* At 659 AM MST, a dangerous snow squall was located over Segundo, or
  12 miles west of Trinidad, moving east at 65 mph.

  HAZARD...Whiteout conditions from just south of Trinidad to the 
           New Mexico border. Zero visibility in snow and blowing 
           snow. Wind gusts expected to be 50 to 70 mph.

  SOURCE...Radar indicated.

  IMPACT...Dangerous life-threatening travel.

Interstate 25 will be impacted by this snow squall. 

Locations impacted include...
Starkville, Segundo and Raton Pass. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.

&&

LAT...LON 3712 10482 3714 10441 3699 10436 3699 10480
TIME...MOT...LOC 1359Z 258DEG 57KT 3713 10473 

$$

Hodanish

The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 15, 6:02 AM MST	Snow Squall Warning	PUB	Alamosa, Conejos, Costilla, Rio Grande, Saguache	43 min
Dec 15, 7:11 AM MST	Dust Storm Warning	PUB	Pueblo	49 min
Dec 15, 7:22 AM MST	Severe Thunderstorm Warning Destructive damage threat	PUB	Crowley, El Paso, Huerfano, Las Animas, Otero, Pueblo	23 min
Dec 15, 8:30 AM MST	Snow Squall Warning	PUB	El Paso	45 min
Dec 15, 9:04 AM MST	Dust Storm Warning	PUB	Crowley, El Paso, Pueblo	26 min
Dec 15, 9:27 AM MST	Dust Storm Warning	PUB	Bent, Crowley, El Paso, Kiowa, Otero, Pueblo	63 min
Dec 15, 9:59 AM MST	Blowing Dust Advisory	PUB	Baca, Bent, Crowley, Custer, El Paso, Fremont and 7 more	6 hr
Dec 15, 11:34 AM MST	Blowing Dust Warning	PUB	Baca, Bent, Crowley, Kiowa, Las Animas, Otero and 1 more	4 hr

Nearby

Snow Squall Warnings in Colorado, 2021 Every snow squall 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.