Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 6, NWS Goodland, KS

April 27, 2021Yuma County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Apr 27, 2021, 5:16 PM MDT for Yuma 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: Apr 27, 2021, 5:16 PM MDT (23:16 UTC)
Expired: Apr 27, 2021, 5:45 PM MDT
In force: 29 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Yuma County, CO

The radar

The Goodland radar (KGLD), 140 km from the middle of the area, began a volume at 23:16 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
Apr 27, 11:45 AM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.3 hours before the alert went out and 70 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.

544 
WUUS53 KGLD 272316
SVRGLD
COC125-272345-
/O.NEW.KGLD.SV.W.0006.210427T2316Z-210427T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
516 PM MDT Tue Apr 27 2021

The National Weather Service in Goodland has issued a

* Severe Thunderstorm Warning for...
  Northwestern Yuma County in northeastern Colorado...

* Until 545 PM MDT.

* At 516 PM MDT, a severe thunderstorm was located near Lone Star, or
  15 miles north of Yuma, moving west at 10 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.

* This severe thunderstorm will remain over mainly rural areas of
  northwestern Yuma County, including the following locations...
  Clarkville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4044 10260 4026 10266 4025 10279 4035 10279
      4035 10278 4044 10278
TIME...MOT...LOC 2316Z 083DEG 8KT 4035 10277 

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

Lockhart

1 follow-up statement

536 
WWUS53 KGLD 272341
SVSGLD

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

COC125-272351-
/O.EXP.KGLD.SV.W.0006.000000T0000Z-210427T2345Z/
Yuma CO-
541 PM MDT Tue Apr 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN YUMA COUNTY WILL
EXPIRE AT 545 PM MDT...
                
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 will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 700 PM MDT for
northeastern Colorado.

LAT...LON 4044 10260 4026 10266 4025 10279 4035 10279
      4035 10278 4044 10278
TIME...MOT...LOC 2341Z 083DEG 8KT 4034 10284 

$$

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, 4:03 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne, Kit Carson	57 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, 5:28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.