Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 158, NWS Goodland, KS

July 16, 2021Cheyenne County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Jul 16, 2021, 5:42 PM MDT for Cheyenne County, Colorado. It was in force for 14 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 16, 2021, 5:42 PM MDT (23:42 UTC)
Expired: Jul 16, 2021, 5:56 PM MDT
In force: 14 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Cheyenne County, CO

The radar

The Pueblo radar (KPUX), 110 km from the middle of the area, began a volume at 23:43 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, 11.7 hours before the alert went out and 102 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2659 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

527 
WUUS53 KGLD 162342
SVRGLD
COC017-170045-
/O.NEW.KGLD.SV.W.0158.210716T2342Z-210717T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
542 PM MDT Fri Jul 16 2021

The National Weather Service in Goodland has issued a

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

* Until 645 PM MDT.

* At 541 PM MDT, a severe thunderstorm was located 6 miles east of
  Boyero, or 23 miles south of Flagler, and is 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.

* This severe thunderstorm will remain over mainly rural areas of
  northwestern Cheyenne County in east central Colorado, including
  the following locations... Aroya.

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 3904 10316 3904 10300 3892 10289 3884 10316
      3885 10317
TIME...MOT...LOC 2341Z 101DEG 2KT 3896 10316 

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

JN

1 follow-up statement

688 
WWUS53 KGLD 162356
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
556 PM MDT Fri Jul 16 2021

COC017-170006-
/O.CAN.KGLD.SV.W.0158.000000T0000Z-210717T0045Z/
Cheyenne CO-
556 PM MDT Fri Jul 16 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.

LAT...LON 3904 10316 3904 10300 3892 10289 3884 10316
      3885 10317
TIME...MOT...LOC 2351Z 101DEG 2KT 3896 10317 

$$

JN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 10:20 PM MDT	Dense Fog Advisory	GLD	Kit Carson, Yuma	11 hr
Jul 16, 4:15 PM MDT	Special Weather Statement	GLD	Kit Carson	30 min
Jul 16, 4:44 PM MDT	Special Weather Statement	GLD	Yuma	46 min
Jul 16, 5:02 PM MDT	Special Weather Statement	GLD	Cheyenne	28 min
Jul 16, 5:29 PM MDT	Flash Flood Warning	GLD	Kit Carson	87 min
Jul 16, 5:34 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	56 min
Jul 16, 5:37 PM MDT	Special Weather Statement	GLD	Cheyenne	23 min
Jul 16, 5:39 PM MDT	Flash Flood Warning	GLD	Cheyenne	58 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.