Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 172, NWS Goodland, KS

August 6, 2021Kit Carson County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Aug 6, 2021, 8:28 PM MDT for Kit Carson County, Colorado. It was in force for 32 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 6, 2021, 8:28 PM MDT (02:28 UTC)
Expired: Aug 6, 2021, 9:00 PM MDT
In force: 32 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

County Kit Carson County, CO

The radar

The Goodland radar (KGLD), 48 km from the middle of the area, began a volume at 02:29 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, 2.5 hours before the alert went out and 110 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: 4 J/kg
Mixed-layer CIN: -256 J/kg
Mixed-layer LCL: 3329 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

862 
WUUS53 KGLD 070228
SVRGLD
COC063-070300-
/O.NEW.KGLD.SV.W.0172.210807T0228Z-210807T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
828 PM MDT Fri Aug 6 2021

The National Weather Service in Goodland has issued a

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

* Until 900 PM MDT.

* At 827 PM MDT, a severe thunderstorm was located 4 miles south of
  Burlington, moving east at 20 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Measured at the Burlington airport.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

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

# 

This includes the following highways...
 Interstate 70 in Colorado between mile markers 433 and 450.
 Highway 385 between mile markers 178 and 188.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3929 10236 3936 10205 3913 10205 3917 10235
TIME...MOT...LOC 0227Z 268DEG 19KT 3924 10226 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Lundquist

2 follow-up statements

861 
WWUS53 KGLD 070234
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
834 PM MDT Fri Aug 6 2021

COC063-070300-
/O.CON.KGLD.SV.W.0172.000000T0000Z-210807T0300Z/
Kit Carson CO-
834 PM MDT Fri Aug 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR EAST CENTRAL KIT CARSON COUNTY...

At 833 PM MDT, a severe thunderstorm was located 6 miles southeast of
Burlington, moving east at 45 mph.

HAZARD...70 mph wind gusts.

SOURCE...Measured at the Burlington airport.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Burlington.

This includes the following highways...
 Interstate 70 in Colorado between mile markers 433 and 450.
 Highway 385 between mile markers 178 and 188.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3929 10236 3936 10205 3913 10205 3917 10235
TIME...MOT...LOC 0233Z 267DEG 38KT 3924 10218 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Lundquist

701 
WWUS53 KGLD 070250
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
850 PM MDT Fri Aug 6 2021

COC063-070300-
/O.EXP.KGLD.SV.W.0172.000000T0000Z-210807T0300Z/
Kit Carson CO-
850 PM MDT Fri Aug 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL KIT CARSON COUNTY
WILL EXPIRE AT 900 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 gusty
winds are still possible with this thunderstorm.

LAT...LON 3929 10236 3936 10205 3913 10205 3917 10235
TIME...MOT...LOC 0250Z 268DEG 19KT 3924 10208 

$$

Lundquist

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 6:39 PM MDT	Special Weather Statement	GLD	Yuma	21 min
Aug 6, 8:08 PM MDT	Special Weather Statement	GLD	Kit Carson	22 min
Aug 7, 2:58 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	32 min
Aug 7, 3:28 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	16 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.