Alert archive / Colorado / Winter Storm Watches in 2021

Winter Storm Watch 6, NWS Pueblo, CO

March 20, 202111 counties in Colorado

NWS Pueblo, CO issued this winter storm watch at Mar 20, 2021, 2:52 PM MDT for 11 counties in Colorado. It took effect at Mar 21, 2021, 6:00 PM MDT. It was in force for .

The area

The counties it named.

The facts

Issued
Mar 20, 2021, 2:52 PM MDT (20:52 UTC)
In effect from
Mar 21, 2021, 6:00 PM MDT
Expired
Mar 21, 2021, 4:02 AM MDT
In force
Issued by
NWS Pueblo, CO

Counties Alamosa County, CO, Chaffee County, CO, Costilla County, CO, Custer County, CO, El Paso County, CO, Fremont County, CO, Huerfano County, CO, Las Animas County, CO, Pueblo County, CO, Saguache County, CO, Teller County, CO

The radar

The Pueblo radar (KPUX), 101 km from the middle of the area, began a volume at 20:55 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, 8.9 hours before the alert went out and 262 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 12:00Z on 2021-03-20Temperature 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 12:00Z on 2021-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.19395878Sfc1 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
2974 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

648 
WWUS45 KPUB 202052
WSWPUB

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pueblo CO
252 PM MDT Sat Mar 20 2021

COZ072>075-079>082-084-210500-
/O.NEW.KPUB.WS.A.0006.210322T0000Z-210322T2100Z/
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Feet-
Southern Sangre de Cristo Mountains Above 11000 Feet-
Wet Mountains between 6300 and 10000 Feet-
Wet Mountains Above 10000 Feet-
Teller County/Rampart Range Above 7500 Feet/Pikes Peak Between
7500 And 11000 Feet-Pikes Peak Above 11000 Feet-
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Feet-
252 PM MDT Sat Mar 20 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY EVENING THROUGH
MONDAY AFTERNOON...

* WHAT...Heavy snow possible. Total snow accumulations of 6 to 12
  inches possible. Winds could gust as high as 35 mph.

* WHERE...The Sangre de Cristo Mountains, Wet Mountains, Teller
  County and the Palmer Divide. 

* WHEN...From Sunday evening through Monday afternoon.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the Monday morning commute, especially
  along I-25 over the Palmer Divide and along Highway 24 from 
  Woodland Park into Colorado Springs. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
2 follow-up statements
536 
WWUS45 KPUB 210341
WSWPUB

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pueblo CO
941 PM MDT Sat Mar 20 2021

COZ072>075-079>082-084-211145-
/O.CON.KPUB.WS.A.0006.210322T0000Z-210322T2100Z/
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Feet-
Southern Sangre de Cristo Mountains Above 11000 Feet-
Wet Mountains between 6300 and 10000 Feet-
Wet Mountains Above 10000 Feet-
Teller County/Rampart Range Above 7500 Feet/Pikes Peak Between
7500 And 11000 Feet-Pikes Peak Above 11000 Feet-
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Feet-
941 PM MDT Sat Mar 20 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH MONDAY AFTERNOON...

* WHAT...Heavy snow possible. Total snow accumulations of 6 to 
  12 inches possible. Winds could gust as high as 35 mph.

* WHERE...The Sangre de Cristo Mountains, Wet Mountains, Teller 
  County and the Palmer Divide.

* WHEN...From Sunday evening through Monday afternoon.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the Monday morning commute, especially 
  along I-25 over the Palmer Divide and along Highway 24 from 
  Woodland Park into Colorado Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

Hodanish
788 
WWUS45 KPUB 211002
WSWPUB

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pueblo CO
402 AM MDT Sun Mar 21 2021

COZ084-211815-
/O.UPG.KPUB.WS.A.0006.210322T0000Z-210322T2100Z/
/O.NEW.KPUB.WS.W.0006.210322T0000Z-210322T1800Z/
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Feet-
402 AM MDT Sun Mar 21 2021

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO NOON
MDT MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8
  inches with locally higher amounts possible.

* WHERE...Northern El Paso County.

* WHEN...From 6 PM this evening to noon MDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the Monday morning commute.

* ADDITIONAL DETAILS...The heaviest snow will fall between 6 PM
  this evening through 6 AM Monday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

COZ081-082-211815-
/O.UPG.KPUB.WS.A.0006.210322T0000Z-210322T2100Z/
/O.NEW.KPUB.WS.W.0006.210321T2200Z-210322T1800Z/
Teller County/Rampart Range Above 7500 Feet/Pikes Peak Between
7500 And 11000 Feet-Pikes Peak Above 11000 Feet-
402 AM MDT Sun Mar 21 2021

...WINTER STORM WARNING IN EFFECT FROM 4 PM THIS AFTERNOON TO
NOON MDT MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 14
  inches.

* WHERE...Pikes Peak, Teller county and the Rampart Range.

* WHEN...From 4 PM this afternoon to noon MDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute.

* ADDITIONAL DETAILS...The heaviest snow will fall late this
  afternoon through tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

COZ079-080-211815-
/O.UPG.KPUB.WS.A.0006.210322T0000Z-210322T2100Z/
/O.NEW.KPUB.WS.W.0006.210322T0000Z-210322T1800Z/
Wet Mountains between 6300 and 10000 Feet-
Wet Mountains Above 10000 Feet-
402 AM MDT Sun Mar 21 2021

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO NOON
MDT MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 12
  inches with locally higher amounts possible on northeast facing
  slopes. Winds gusting as high as 35 mph.

* WHERE...Wet Mountains.

* WHEN...From 6 PM this evening to noon MDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the Monday morning commute.

* ADDITIONAL DETAILS...The heaviest snow will fall tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

COZ072>075-211815-
/O.UPG.KPUB.WS.A.0006.210322T0000Z-210322T2100Z/
/O.NEW.KPUB.WW.Y.0016.210322T0000Z-210322T1800Z/
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Feet-
Southern Sangre de Cristo Mountains Above 11000 Feet-
402 AM MDT Sun Mar 21 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
NOON MDT MONDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
  with locally higher amounts on northeast facing slopes. Winds 
  gusting as high as 35 mph.

* WHERE...the Sangre de Cristo Mountains.

* WHEN...From 6 PM this evening to noon MDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute.

* ADDITIONAL DETAILS...The heaviest snow will fall tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

COZ058-060-061-063-076-211815-
/O.NEW.KPUB.WW.Y.0016.210322T0000Z-210322T1800Z/
Western Mosquito Range/East Lake County Above 11000 Feet-
Eastern Sawatch Mountains Above 11000 Feet-
Western Chaffee County Between 9000 and 11000 Feet-
Western Mosquito Range/East Chaffee County Above 9000 Feet-
Northwestern Fremont County Above 8500 Feet-
402 AM MDT Sun Mar 21 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
NOON MDT MONDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 9 
  inches.

* WHERE...Western Mosquito Range, Eastern Sawatch Mountains, and 
  Northwestern Fremont County Above 8500 Feet Counties.

* WHEN...From 6 PM this evening to noon MDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the Monday morning commute.

* ADDITIONAL DETAILS...The heaviest snow will fall tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

COZ059-062-077-078-211815-
/O.NEW.KPUB.WW.Y.0016.210322T0000Z-210322T1800Z/
Leadville Vicinity/Lake County Below 11000 Feet-
Central Chaffee County Below 9000 Feet-
Western/Central Fremont County Below 8500 Feet-
Wet Mountain Valley Below 8500 Feet-
402 AM MDT Sun Mar 21 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
NOON MDT MONDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
  with the heaviest amounts near the mountains. Winds gusting as 
  high as 35 mph.

* WHERE...Central Lake County Below 11000 Feet, Central Chaffee
  County Below 9000 Feet, Western and Central Fremont County Below
  8500 Feet and the Wet Mountain Valley.

* WHEN...From 6 PM this evening to noon MDT Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the Monday morning commute.

* ADDITIONAL DETAILS...The heaviest snow will fall tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

COZ083-085-087-211815-
/O.NEW.KPUB.WW.Y.0016.210322T0200Z-210322T1800Z/
Canon City Vicinity/Eastern Fremont County-
Colorado Springs Vicinity/Southern El Paso County/Rampart Range
Below 7400 Feet-
Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Feet-
402 AM MDT Sun Mar 21 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO
NOON MDT MONDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 
  inches.

* WHERE...Eastern Fremont County including Canon City, Southern El
  Paso County including Colorado Springs, and Huerfano County
  including Walsenburg.

* WHEN...From 8 PM this evening to noon MDT Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning commute.

* ADDITIONAL DETAILS...The heaviest snow will fall tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

Nearby

Winter Storm Watches in Colorado, 2021Every winter storm 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.