Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 206, NWS Goodland, KS

August 19, 2021Yuma County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Aug 19, 2021, 4:05 PM MDT for Yuma County, Colorado. It was in force for 25 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: Aug 19, 2021, 4:05 PM MDT (22:05 UTC)
Expired: Aug 19, 2021, 4:30 PM MDT
In force: 25 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), 123 km from the middle of the area, began a volume at 22:08 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
Aug 19, 1:14 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.1 hours before the alert went out and 104 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: 246 J/kg
Mixed-layer CIN: -241 J/kg
Mixed-layer LCL: 927 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -59 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

935 
WUUS53 KGLD 192205 RRA
SVRGLD
COC125-192230-
/O.NEW.KGLD.SV.W.0206.210819T2205Z-210819T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
405 PM MDT Thu Aug 19 2021

The National Weather Service in Goodland has issued a

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

* Until 430 PM MDT.

* At 405 PM MDT, a severe thunderstorm was located 13 miles southeast
  of Holyoke, moving northeast at 30 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
  northeastern Yuma County.

This includes Highway 385 between mile markers 262 and 270.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4044 10205 4035 10205 4031 10244 4044 10253
TIME...MOT...LOC 2205Z 245DEG 28KT 4041 10220 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JRM

2 follow-up statements

729 
WWUS53 KGLD 192213
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
413 PM MDT Thu Aug 19 2021

COC125-192230-
/O.CON.KGLD.SV.W.0206.000000T0000Z-210819T2230Z/
Yuma CO-
413 PM MDT Thu Aug 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MDT
FOR NORTHEASTERN YUMA COUNTY...

At 413 PM MDT, a severe thunderstorm was located 12 miles south of
Pleasant Valley, or 12 miles southeast of Holyoke, moving northeast
at 25 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
northeastern Yuma County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4044 10205 4038 10208 4035 10226 4044 10227
TIME...MOT...LOC 2213Z 226DEG 21KT 4043 10217 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JRM

954 
WWUS53 KGLD 192223
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
423 PM MDT Thu Aug 19 2021

COC125-192233-
/O.EXP.KGLD.SV.W.0206.000000T0000Z-210819T2230Z/
Yuma CO-
423 PM MDT Thu Aug 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN YUMA COUNTY WILL
EXPIRE AT 430 PM MDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 800 PM MDT for
northeastern Colorado.

LAT...LON 4044 10205 4038 10208 4035 10226 4044 10227
TIME...MOT...LOC 2223Z 245DEG 28KT 4046 10208 

$$

JRM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 2:49 PM MDT	Severe Thunderstorm Warning	GLD	Yuma	26 min
Aug 19, 3:14 PM MDT	Severe Thunderstorm Warning	GLD	Yuma	46 min
Aug 19, 3:38 PM MDT	Severe Thunderstorm Warning	GLD	Yuma	52 min
Aug 19, 5:05 PM MDT	Special Weather Statement	GLD	Yuma	25 min
Aug 19, 5:37 PM MDT	Special Weather Statement	GLD	Phillips	38 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.