Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 197, NWS Goodland, KS

August 12, 2021Kit Carson County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Aug 12, 2021, 7:52 PM MDT for Kit Carson County, Colorado. It was in force for 29 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
Aug 12, 2021, 7:52 PM MDT (01:52 UTC)
Expired
Aug 12, 2021, 8:21 PM MDT
In force
29 min
Issued by
NWS Goodland, KS
Area
Storm-based polygon
Hail
1.5 in
Wind
50.0 mph

County Kit Carson County, CO

The radar

The Pueblo radar (KPUX), 122 km from the middle of the area, began a volume at 01:52 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, 1.9 hours before the alert went out and 79 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 2021-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 616 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 2021-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.1939Sfc1 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
616 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
2322 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

476 
WUUS53 KGLD 130152
SVRGLD
COC063-130245-
/O.NEW.KGLD.SV.W.0197.210813T0152Z-210813T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
752 PM MDT Thu Aug 12 2021

The National Weather Service in Goodland has issued a

* Severe Thunderstorm Warning for...
  Southwestern Kit Carson County in east central Colorado...

* Until 845 PM MDT.

* At 752 PM MDT, a severe thunderstorm was located 7 miles south of
  Flagler, moving west at 15 mph.

  HAZARD...Ping pong ball size hail.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect 
           damage to roofs, siding, windows, and vehicles.

* This severe thunderstorm will remain over mainly rural areas of
  southwestern Kit Carson County.

This includes Interstate 70 in Colorado between mile markers 391 and
400.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3913 10316 3917 10315 3929 10315 3927 10297
      3908 10297 3907 10316
TIME...MOT...LOC 0152Z 093DEG 14KT 3918 10311 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

024
1 follow-up statement
703 
WWUS53 KGLD 130221 RRA
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
821 PM MDT Thu Aug 12 2021

COC063-130231-
/O.CAN.KGLD.SV.W.0197.000000T0000Z-210813T0245Z/
Kit Carson CO-
821 PM MDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KIT CARSON COUNTY
IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However heavy rain is still possible with this
thunderstorm.

LAT...LON 3913 10316 3917 10315 3929 10315 3927 10297
      3908 10297 3907 10316
TIME...MOT...LOC 0216Z 093DEG 14KT 3919 10326 

$$

024

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 12, 7:08 PM MDTSpecial Weather StatementGLDKit Carson37 min
Aug 12, 7:16 PM MDTSevere Thunderstorm WarningGLDKit Carson29 min
Aug 12, 7:28 PM MDTFlash Flood WarningGLDKit Carson3 hr
Aug 12, 7:45 PM MDTSevere Thunderstorm WarningGLDKit Carson45 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2021Every 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.