Alert archive / Colorado / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 80, NWS Goodland, KS

June 23, 2020Cheyenne County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Jun 23, 2020, 4:04 PM MDT for Cheyenne County, Colorado. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 23, 2020, 4:04 PM MDT (22:04 UTC)
Expired: Jun 23, 2020, 4:35 PM MDT
In force: 31 min
Issued by: NWS Goodland, KS
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Cheyenne County, CO

The radar

The Goodland radar (KGLD), 98 km from the middle of the area, began a volume at 22:07 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 12:00Z, 10.1 hours before the alert went out and 128 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: 1514 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Goodland, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 2:35 PM MDT, 1 hour 29 minutes earlier.

Area forecast discussion, Jun 23, 2:35 PM MDT, 1 hour 29 minutes before

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Hazardous weather outlook, Jun 23, 12:52 PM MDT, 3 hours 12 minutes before

Hazardous Weather Outlook
National Weather Service Goodland KS
1252 PM MDT Tue Jun 23 2020

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-241900-
Yuma County-Kit Carson County-Cheyenne County-Cheyenne-Rawlins-
Decatur-Norton-Sherman-Thomas-Sheridan-Graham-Wallace-Logan-Gove-
Greeley-Wichita-Dundy-Hitchcock-Red Willow-
1252 PM MDT Tue Jun 23 2020 /152 PM CDT Tue Jun 23 2020/

This hazardous weather outlook is for extreme southwest Nebraska...
northwest Kansas and east central Colorado.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

An isolated severe thunderstorm is possible this afternoon, mainly
south and west of Goodland between 1 PM and 7 PM MDT. Dime to
quarter size hail and wind gusts up to 65 mph are the primary
hazards.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY...

Isolated severe thunderstorms capable of producing large hail and
damaging winds are possible across portions of the Tri-State area
on Wednesday June 24, mainly east of Highway 83 between 3 PM and
8 PM MDT.

Elevated Fire Weather conditions are anticipated in Eastern Colorado
late this week through the upcoming weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed Wednesday afternoon.

Vincent

In the hours before

Special weather statement, Jun 23, 1:08 PM MDT, 2 hours 56 minutes before

Special Weather Statement
National Weather Service Goodland KS
108 PM MDT Tue Jun 23 2020

COZ091-231945-
Kit Carson County CO-
108 PM MDT Tue Jun 23 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL KIT CARSON COUNTY
UNTIL 145 PM MDT...

At 107 PM MDT, Doppler radar was tracking a strong thunderstorm near
Vona, or near Seibert, moving southeast at 10 mph.

Pea size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Stratton, Seibert and Vona.

This includes Interstate 70 in Colorado between mile markers 404 and
426.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall with this storm may lead to localized flooding.
Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3929 10291 3940 10278 3926 10242 3905 10271
TIME...MOT...LOC 1907Z 310DEG 8KT 3931 10280

Vincent

Special weather statement, Jun 23, 1:21 PM MDT, 2 hours 43 minutes before

Special Weather Statement
National Weather Service Goodland KS
121 PM MDT Tue Jun 23 2020

COZ091-092-232000-
Kit Carson County CO-Cheyenne County CO-
121 PM MDT Tue Jun 23 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CHEYENNE AND
SOUTHEASTERN KIT CARSON COUNTIES IN EAST CENTRAL COLORADO UNTIL 200
PM MDT...

At 121 PM MDT, Doppler radar was tracking a strong thunderstorm 14
miles north of Cheyenne Wells, moving southeast at 15 mph.

Pea size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Arapahoe.

This includes Highway 385 between mile markers 156 and 177.

LAT...LON 3898 10254 3917 10231 3908 10205 3903 10204
      3874 10205
TIME...MOT...LOC 1921Z 313DEG 13KT 3902 10226

Vincent

Special weather statement, Jun 23, 2:30 PM MDT, 1 hour 34 minutes before

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Local storm report, Jun 23, 2:46 PM MDT, 1 hour 18 minutes before

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Special weather statement, Jun 23, 2:50 PM MDT, 1 hour 14 minutes before

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Special weather statement, Jun 23, 2:52 PM MDT, 1 hour 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 6:12 PM MDT	Special Weather Statement	GLD	Norton	18 min
Jun 22, 6:26 PM MDT	Severe Thunderstorm Warning	GLD	Norton	34 min
Jun 23, 12:05 AM MDT	Special Weather Statement	GLD	Logan, Wallace	40 min
Jun 23, 12:59 AM MDT	Special Weather Statement	GLD	Greeley	46 min
Jun 23, 2:52 PM MDT	Special Weather Statement	GLD	Wallace	38 min
Jun 23, 1:08 PM MDT	Special Weather Statement	GLD	Kit Carson	37 min
Jun 23, 1:21 PM MDT	Special Weather Statement	GLD	Cheyenne	39 min
Jun 23, 1:45 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	60 min
Jun 23, 2:30 PM MDT	Special Weather Statement	GLD	Cheyenne	45 min
Jun 23, 2:50 PM MDT	Special Weather Statement	GLD	Cheyenne	55 min
Jun 23, 4:12 PM MDT	Special Weather Statement	GLD	Kit Carson	33 min
Jun 23, 5:43 PM MDT	Special Weather Statement	GLD	Kit Carson	17 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2020 Every severe thunderstorm warning in 2020

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.