Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 45, NWS Goodland, KS

May 15, 2021Cheyenne County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at May 15, 2021, 9:28 PM MDT for Cheyenne County, Colorado. It was in force for 12 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: May 15, 2021, 9:28 PM MDT (03:28 UTC)
Expired: May 15, 2021, 9:40 PM MDT
In force: 12 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), 115 km from the middle of the area, began a volume at 03:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 15, 4:06 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 3.5 hours before the alert went out and 119 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: 841 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 973 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

767 
WUUS53 KGLD 160328
SVRGLD
COC017-160400-
/O.NEW.KGLD.SV.W.0045.210516T0328Z-210516T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
928 PM MDT Sat May 15 2021

The National Weather Service in Goodland has issued a

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

* Until 1000 PM MDT.

* At 927 PM MDT, a severe thunderstorm was located 8 miles northwest
  of Kit Carson, or 29 miles west of Cheyenne Wells, moving northeast
  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
  northwestern Cheyenne County in east central Colorado, including
  the following locations... Wild Horse.

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 3871 10289 3885 10305 3903 10286 3891 10256
TIME...MOT...LOC 0327Z 220DEG 11KT 3886 10291 

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

JN

1 follow-up statement

161 
WWUS53 KGLD 160340 RRA
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
940 PM MDT Sat May 15 2021

COC017-160350-
/O.CAN.KGLD.SV.W.0045.000000T0000Z-210516T0400Z/
Cheyenne CO-
940 PM MDT Sat May 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN 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 small hail and
heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
east central Colorado.

LAT...LON 3871 10289 3885 10305 3903 10286 3891 10256
TIME...MOT...LOC 0338Z 220DEG 11KT 3889 10288 

$$

JN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 9:43 PM MDT	Special Weather Statement	GLD	Cheyenne	62 min
May 15, 10:05 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne, Kit Carson	20 min
May 15, 10:39 PM MDT	Special Weather Statement	GLD	Kit Carson	51 min
May 16, 4:41 PM MDT	Special Weather Statement	GLD	Cheyenne	64 min
May 16, 5:15 PM MDT	Special Weather Statement	GLD	Kit Carson	30 min
May 16, 5:21 PM MDT	Tornado Warning	GLD	Cheyenne	24 min
May 16, 5:25 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	35 min
May 16, 5:30 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	45 min
May 16, 5:44 PM MDT	Special Weather Statement	GLD	Kit Carson	61 min
May 16, 5:46 PM MDT	Flash Flood Warning	GLD	Kit Carson	3 hr
May 16, 5:58 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne, Kit Carson	62 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.