Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 187, NWS Goodland, KS

August 9, 2021Cheyenne County, Kansas

NWS Goodland, KS issued this severe thunderstorm warning at Aug 9, 2021, 7:30 PM CDT for Cheyenne County, Kansas. It was in force for 30 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: Aug 9, 2021, 7:30 PM CDT (00:30 UTC)
Expired: Aug 9, 2021, 8:00 PM CDT
In force: 30 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cheyenne County, KS

The radar

The Goodland radar (KGLD), 55 km from the middle of the area, began a volume at 00:31 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
Aug 9, 7:30 PM CDT	HAIL 1	12 W Saint Francis, KS	HAIL LASTED AROUND 15 MINUTES.

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

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.5 hours before the alert went out and 110 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: 173 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 4153 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

469 
WUUS53 KGLD 100030
SVRGLD
KSC023-100100-
/O.NEW.KGLD.SV.W.0187.210810T0030Z-210810T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
730 PM CDT Mon Aug 9 2021

The National Weather Service in Goodland has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cheyenne County in northwestern Kansas...

* Until 800 PM CDT.

* At 729 PM CDT, a severe thunderstorm was located 13 miles west of
  St. Francis, moving northeast at 15 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.

* This severe thunderstorm will remain over mainly rural areas of
  northwestern Cheyenne County in northwestern Kansas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3976 10184 3975 10205 3988 10205 3995 10196
TIME...MOT...LOC 0029Z 240DEG 15KT 3982 10204 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MRC

1 follow-up statement

637 
WWUS53 KGLD 100051
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
751 PM CDT Mon Aug 9 2021

KSC023-100101-
/O.EXP.KGLD.SV.W.0187.000000T0000Z-210810T0100Z/
Cheyenne KS-
751 PM CDT Mon Aug 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHEYENNE COUNTY
IN NORTHWESTERN KANSAS WILL EXPIRE AT 800 PM CDT...
                
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.

LAT...LON 3976 10184 3975 10205 3988 10205 3995 10196
TIME...MOT...LOC 0051Z 270DEG 15KT 3986 10194 

$$

MRC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 7:21 PM CDT	Special Weather Statement	GLD	Cheyenne	24 min
Aug 9, 7:55 PM CDT	Special Weather Statement	GLD	Cheyenne	35 min
Aug 9, 8:21 PM CDT	Special Weather Statement	GLD	Cheyenne	9 min
Aug 9, 8:31 PM CDT	Special Weather Statement	GLD	Cheyenne	44 min
Aug 9, 9:16 PM CDT	Special Weather Statement	GLD	Cheyenne	44 min
Aug 9, 11:32 PM CDT	Special Weather Statement	GLD	Norton	28 min
Aug 10, 12:01 AM CDT	Special Weather Statement	GLD	Norton	44 min
Aug 10, 12:19 AM CDT	Special Weather Statement	GLD	Graham	41 min
Aug 10, 12:33 AM CDT	Severe Thunderstorm Warning	GLD	Graham	41 min
Aug 10, 1:03 AM CDT	Special Weather Statement	GLD	Norton	42 min

Nearby

Severe Thunderstorm Warnings in Kansas, 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.