Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 3, NWS Goodland, KS

April 27, 2021Yuma County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Apr 27, 2021, 2:42 AM MDT for Yuma County, Colorado. It was in force for 33 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, 2:42 AM MDT (08:42 UTC)
Expired: Apr 27, 2021, 3:15 AM MDT
In force: 33 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Yuma County, CO

The radar

The Goodland radar (KGLD), 86 km from the middle of the area, began a volume at 08:45 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 00:00Z, 8.7 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: 4461 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

115 
WUUS53 KGLD 270842
SVRGLD
COC125-270915-
/O.NEW.KGLD.SV.W.0003.210427T0842Z-210427T0915Z/

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

The National Weather Service in Goodland has issued a

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

* Until 315 AM MDT.

* At 241 AM MDT, severe thunderstorms were located along a line
  extending from 8 miles southwest of Eckley to 19 miles northwest of
  Bonny Reservoir, moving east at 35 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.

* These severe thunderstorms will remain over mainly rural areas of
  southern Yuma County, including the following locations... Abarr,
  Heartstrong, Idalia and Vernon.

This includes Highway 385 between mile markers 212 and 238.
 
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 4009 10227 3979 10214 3963 10221 3977 10279
      4008 10279
TIME...MOT...LOC 0841Z 285DEG 30KT 4004 10261 3976 10248 

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

JN

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, 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, 5:16 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.