Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 4, NWS Goodland, KS

April 27, 2021Cheyenne County, Kit Carson County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Apr 27, 2021, 4:03 PM MDT for Cheyenne County, Kit Carson County, Colorado. It was in force for 57 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: Apr 27, 2021, 4:03 PM MDT (22:03 UTC)
Expired: Apr 27, 2021, 5:00 PM MDT
In force: 57 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), 119 km from the middle of the area, began a volume at 22:02 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
Apr 27, 4:28 PM MDT	HAIL 0.88	15 S Flagler, CO	PEA TO NICKEL SIZED HAIL.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 27, 11:45 AM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.1 hours before the alert went out and 76 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: 3214 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

125 
WUUS53 KGLD 272203
SVRGLD
COC017-063-272300-
/O.NEW.KGLD.SV.W.0004.210427T2203Z-210427T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
403 PM MDT Tue Apr 27 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 500 PM MDT.

* At 403 PM MDT, a severe thunderstorm was located 5 miles southeast
  of Hugo, or 20 miles southeast of Limon, moving northeast at 20
  mph.

  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...
  Flagler.

This includes Interstate 70 in Colorado between mile markers 391 and
398.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3942 10315 3904 10280 3892 10316
TIME...MOT...LOC 2203Z 232DEG 16KT 3907 10340 

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

Lockhart

1 follow-up statement

586 
WWUS53 KGLD 272235
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
435 PM MDT Tue Apr 27 2021

COC017-063-272300-
/O.CON.KGLD.SV.W.0004.000000T0000Z-210427T2300Z/
Cheyenne CO-Kit Carson CO-
435 PM MDT Tue Apr 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM MDT
FOR NORTHWESTERN CHEYENNE AND SOUTHWESTERN KIT CARSON COUNTIES IN
EAST CENTRAL COLORADO...

At 435 PM MDT, a severe thunderstorm was located 8 miles south of
Flagler, moving northeast at 30 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.

Locations impacted include...
Flagler.

This includes Interstate 70 in Colorado between mile markers 391 and
398.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3942 10315 3904 10280 3892 10316
TIME...MOT...LOC 2235Z 236DEG 25KT 3917 10309 

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

Lockhart

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 2:06 AM MDT	Severe Thunderstorm Warning	GLD	Yuma	39 min
Apr 27, 2:42 AM MDT	Severe Thunderstorm Warning	GLD	Yuma	33 min
Apr 27, 3:58 PM MDT	Special Weather Statement	GLD	Cheyenne	62 min
Apr 27, 4:06 PM MDT	Tornado Warning	GLD	Cheyenne	24 min
Apr 27, 4:22 PM MDT	Special Weather Statement	GLD	Kit Carson	38 min
Apr 27, 4:31 PM MDT	Tornado Warning Tornado observed	GLD	Cheyenne	29 min
Apr 27, 4:40 PM MDT	Tornado Warning	GLD	Kit Carson	35 min
Apr 27, 4:47 PM MDT	Tornado Warning	GLD	Kit Carson, Yuma	43 min
Apr 27, 4:57 PM MDT	Special Weather Statement	GLD	Kit Carson	48 min
Apr 27, 5:02 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	32 min
Apr 27, 5:16 PM MDT	Severe Thunderstorm Warning	GLD	Yuma	29 min
Apr 27, 5:28 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson, Yuma	26 min
Apr 27, 5:33 PM MDT	Special Weather Statement	GLD	Cheyenne	42 min
Apr 27, 5:40 PM MDT	Special Weather Statement	GLD	Phillips	35 min
Apr 27, 5:53 PM MDT	Special Weather Statement	GLD	Kit Carson, Yuma	67 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.