Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 167, NWS Goodland, KS

July 18, 2021Cheyenne County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Jul 18, 2021, 1:14 PM MDT for Cheyenne 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: Jul 18, 2021, 1:14 PM MDT (19:14 UTC)
Expired: Jul 18, 2021, 1:43 PM MDT
In force: 29 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cheyenne County, CO

The radar

The Goodland radar (KGLD), 66 km from the middle of the area, began a volume at 19:14 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, 7.2 hours before the alert went out and 132 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: 2 J/kg
Mixed-layer CIN: -396 J/kg
Mixed-layer LCL: 2164 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

555 
WUUS53 KGLD 181914
SVRGLD
COC017-182015-
/O.NEW.KGLD.SV.W.0167.210718T1914Z-210718T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
114 PM MDT Sun Jul 18 2021

The National Weather Service in Goodland has issued a

* Severe Thunderstorm Warning for...
  Northeastern Cheyenne County in east central Colorado...

* Until 215 PM MDT.

* At 114 PM MDT, a severe thunderstorm was located 9 miles northeast
  of Cheyenne Wells, and is nearly stationary.

  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.

* This severe thunderstorm will remain over mainly rural areas of
  northeastern Cheyenne County in east central Colorado.

This includes Highway 385 between mile markers 158 and 168.
 
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 3888 10234 3901 10238 3905 10220 3905 10215
      3886 10211
TIME...MOT...LOC 1914Z 258DEG 4KT 3894 10227 

HAIL...1.00IN
WIND...60MPH
 
$$

Lundquist

2 follow-up statements

853 
WWUS53 KGLD 181931
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
131 PM MDT Sun Jul 18 2021

COC017-182015-
/O.CON.KGLD.SV.W.0167.000000T0000Z-210718T2015Z/
Cheyenne CO-
131 PM MDT Sun Jul 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM MDT
FOR NORTHEASTERN CHEYENNE COUNTY IN EAST CENTRAL COLORADO...

At 130 PM MDT, a severe thunderstorm was located 10 miles northeast
of Cheyenne Wells, moving east at 10 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.

This severe thunderstorm will remain over mainly rural areas of
northeastern Cheyenne County in east central Colorado.

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 3888 10234 3897 10235 3901 10214 3886 10211
TIME...MOT...LOC 1930Z 279DEG 7KT 3893 10222 

HAIL...1.00IN
WIND...60MPH
 
$$

Lundquist

329 
WWUS53 KGLD 181943
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
143 PM MDT Sun Jul 18 2021

COC017-181953-
/O.CAN.KGLD.SV.W.0167.000000T0000Z-210718T2015Z/
Cheyenne CO-
143 PM MDT Sun Jul 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHEYENNE COUNTY
IN EAST CENTRAL COLORADO IS CANCELLED...
                
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 has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 3888 10234 3897 10235 3901 10214 3886 10211
TIME...MOT...LOC 1939Z 258DEG 4KT 3893 10220 

$$

Lundquist

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 10:44 PM MDT	Special Weather Statement	GLD	Kit Carson	61 min
Jul 17, 11:38 PM MDT	Special Weather Statement	GLD	Cheyenne, Kit Carson	82 min
Jul 17, 11:56 PM MDT	Special Weather Statement	GLD	Yuma	64 min
Jul 18, 12:17 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	58 min
Jul 18, 12:45 PM MDT	Special Weather Statement	GLD	Cheyenne	15 min
Jul 18, 12:53 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	39 min
Jul 18, 12:58 PM MDT	Special Weather Statement	GLD	Cheyenne	17 min
Jul 18, 1:35 PM MDT	Special Weather Statement	GLD	Cheyenne	25 min
Jul 18, 1:39 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	45 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.