Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 52, NWS Goodland, KS

May 16, 2021Cheyenne County, Kit Carson County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at May 16, 2021, 5:58 PM MDT for Cheyenne County, Kit Carson County, Colorado. It was in force for 62 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 16, 2021, 5:58 PM MDT (23:58 UTC)
Expired: May 16, 2021, 7:00 PM MDT
In force: 62 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Cheyenne County, CO, Kit Carson County, CO

The radar

The Goodland radar (KGLD), 113 km from the middle of the area, began a volume at 00:01 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.

What was reported inside it

Time	Report	Where	Remark
May 16, 7:05 PM MDT	FUNNEL CLOUD	17 S Vona, CO	TRAINED SPOTTER SAW A FUNNEL CLOUD FROM FIELD IN NORTHERN CHEYENNE COUNTY. LOCATION OF REPORT IS ESTIMATED LOCATION OF FUNNEL BASED ON RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 12.0 hours before the alert went out and 82 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: 215 J/kg
Mixed-layer CIN: -294 J/kg
Mixed-layer LCL: 861 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: -44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

650 
WUUS53 KGLD 162358
SVRGLD
COC017-063-170100-
/O.NEW.KGLD.SV.W.0052.210516T2358Z-210517T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
558 PM MDT Sun May 16 2021

The National Weather Service in Goodland has issued a

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

* Until 700 PM MDT.

* At 558 PM MDT, severe thunderstorms were located along a line
  extending from 8 miles southwest of Flagler to 3 miles southeast of
  Stratton, and are nearly stationary.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* These severe thunderstorms will remain over mainly rural areas of
  northwestern Cheyenne and southwestern Kit Carson Counties in east
  central Colorado.

This includes Interstate 70 in Colorado between mile markers 391 and
424.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3913 10316 3917 10315 3941 10316 3945 10255
      3898 10243 3898 10315 3903 10316
TIME...MOT...LOC 2358Z 353DEG 1KT 3919 10315 3926 10256 

HAIL...1.25IN
WIND...60MPH
 
$$

JN

1 follow-up statement

866 
WWUS53 KGLD 170016
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
616 PM MDT Sun May 16 2021

COC017-063-170100-
/O.CON.KGLD.SV.W.0052.000000T0000Z-210517T0100Z/
Cheyenne CO-Kit Carson CO-
616 PM MDT Sun May 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MDT
FOR NORTHWESTERN CHEYENNE AND SOUTHWESTERN KIT CARSON COUNTIES IN
EAST CENTRAL COLORADO...

At 616 PM MDT, severe thunderstorms were located along a line
extending from 8 miles southwest of Flagler to 4 miles southeast of
Stratton, and are nearly stationary.
 
HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Stratton, Flagler, Seibert and Vona. 

People attending Flagler School should seek safe shelter immediately!

This includes Interstate 70 in Colorado between mile markers 391 and
424.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3913 10316 3917 10315 3941 10316 3945 10255
      3898 10243 3898 10315 3903 10316
TIME...MOT...LOC 0016Z 353DEG 1KT 3919 10315 3926 10256 

HAIL...1.25IN
WIND...60MPH
 
$$

JN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 9:28 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	12 min
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

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.