Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 276, NWS Pueblo, CO

September 4, 2021Huerfano County, Pueblo County, Colorado

NWS Pueblo, CO issued this severe thunderstorm warning at Sep 4, 2021, 6:32 PM MDT for Huerfano County, Pueblo County, Colorado. It was in force for 28 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: Sep 4, 2021, 6:32 PM MDT (00:32 UTC)
Expired: Sep 4, 2021, 7:00 PM MDT
In force: 28 min
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Huerfano County, CO, Pueblo County, CO

The radar

The Pueblo radar (KPUX), 82 km from the middle of the area, began a volume at 00:32 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, 0.5 hours before the alert went out and 255 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: 63 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 3010 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

900 
WUUS55 KPUB 050032
SVRPUB
COC055-101-050100-
/O.NEW.KPUB.SV.W.0276.210905T0032Z-210905T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pueblo CO
632 PM MDT Sat Sep 4 2021

The National Weather Service in Pueblo has issued a

* Severe Thunderstorm Warning for...
  North central Huerfano County in southeastern Colorado...
  Southwestern Pueblo County in southeastern Colorado...

* Until 700 PM MDT.

* At 631 PM MDT, a severe thunderstorm was located 10 miles northeast
  of Greenhorn Mountain, or 16 miles southeast of Junkins Burn Scar,
  moving southeast at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Rye and Colorado City. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3797 10502 3809 10493 3802 10466 3783 10482
TIME...MOT...LOC 0031Z 297DEG 16KT 3798 10487 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Rodriguez

2 follow-up statements

241 
WWUS55 KPUB 050042
SVSPUB

Severe Weather Statement
National Weather Service Pueblo CO
642 PM MDT Sat Sep 4 2021

COC055-101-050100-
/O.CON.KPUB.SV.W.0276.000000T0000Z-210905T0100Z/
Huerfano CO-Pueblo CO-
642 PM MDT Sat Sep 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MDT
FOR NORTH CENTRAL HUERFANO AND SOUTHWESTERN PUEBLO COUNTIES...

At 642 PM MDT, a severe thunderstorm was located 10 miles northeast
of Greenhorn Mountain, or 18 miles southeast of Junkins Burn Scar,
moving southeast at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Colorado City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3796 10497 3805 10491 3802 10466 3783 10482
TIME...MOT...LOC 0042Z 299DEG 14KT 3796 10485 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Rodriguez

195 
WWUS55 KPUB 050055
SVSPUB

Severe Weather Statement
National Weather Service Pueblo CO
655 PM MDT Sat Sep 4 2021

COC055-101-050105-
/O.EXP.KPUB.SV.W.0276.000000T0000Z-210905T0100Z/
Huerfano CO-Pueblo CO-
655 PM MDT Sat Sep 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL HUERFANO AND
SOUTHWESTERN PUEBLO COUNTIES WILL EXPIRE AT 700 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 3796 10497 3805 10491 3802 10466 3783 10482
TIME...MOT...LOC 0055Z 297DEG 16KT 3794 10480 

$$

Rodriguez

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 6:12 PM MDT	Special Weather Statement	PUB	Huerfano	33 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2021 Every severe thunderstorm 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.