Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 235, NWS Goodland, KS
NWS Goodland, KS issued this severe thunderstorm warning at Sep 12, 2021, 6:37 PM MDT for Cheyenne County, Colorado. It was in force for 53 min. 2 reports 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
- Sep 12, 2021, 6:37 PM MDT (00:37 UTC)
- Expired
- Sep 12, 2021, 7:30 PM MDT
- In force
- 53 min
- Issued by
- NWS Goodland, KS
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Cheyenne County, CO
The radar
The Goodland radar (KGLD), 95 km from the middle of the area, began a volume at 00:41 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 |
|---|---|---|---|
| Sep 12, 6:44 PM MDT | TSTM WND GST 53 | 2 Sw Firstview, CO | |
| Sep 12, 6:55 PM MDT | HAIL 0.25 | 1 W Cheyenne Wells, CO | SPOTTER REPORTED PEA SIZE HAIL AND HEAVY RAIN. |
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, 0.6 hours before the alert went out and 123 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.
- Mixed-layer CAPE
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2604 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
360
WUUS53 KGLD 130037
SVRGLD
COC017-130130-
/O.NEW.KGLD.SV.W.0235.210913T0037Z-210913T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Goodland KS
637 PM MDT Sun Sep 12 2021
The National Weather Service in Goodland has issued a
* Severe Thunderstorm Warning for...
Cheyenne County in east central Colorado...
* Until 730 PM MDT.
* At 637 PM MDT, a severe thunderstorm was located 12 miles northeast
of Kit Carson, or 13 miles west of Cheyenne Wells, moving east at
40 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 be near...
Cheyenne Wells around 655 PM MDT.
This includes Highway 385 between mile markers 136 and 169.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3904 10295 3905 10205 3862 10205 3862 10300
TIME...MOT...LOC 0037Z 265DEG 36KT 3885 10260
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TT4 follow-up statements
459
WWUS53 KGLD 130052
SVSGLD
Severe Weather Statement
National Weather Service Goodland KS
652 PM MDT Sun Sep 12 2021
COC017-130130-
/O.CON.KGLD.SV.W.0235.000000T0000Z-210913T0130Z/
Cheyenne CO-
652 PM MDT Sun Sep 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT
FOR CHEYENNE COUNTY IN EAST CENTRAL COLORADO...
At 652 PM MDT, a severe thunderstorm was located near Cheyenne Wells,
moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
Cheyenne County in east central Colorado, including the following
locations... Arapahoe and Firstview.
This includes Highway 385 between mile markers 136 and 169.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3904 10281 3905 10205 3862 10205 3862 10289
TIME...MOT...LOC 0052Z 273DEG 32KT 3882 10231
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TT467 WWUS53 KGLD 130105 SVSGLD Severe Weather Statement National Weather Service Goodland KS 705 PM MDT Sun Sep 12 2021 COC017-130130- /O.CON.KGLD.SV.W.0235.000000T0000Z-210913T0130Z/ Cheyenne CO- 705 PM MDT Sun Sep 12 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT FOR EASTERN CHEYENNE COUNTY IN EAST CENTRAL COLORADO... At 704 PM MDT, a severe thunderstorm was located 10 miles west of Weskan, or 10 miles east of Cheyenne Wells, moving east at 40 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Cheyenne Wells, Arapahoe and Firstview. This includes Highway 385 between mile markers 136 and 160. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3890 10257 3905 10205 3862 10205 3862 10274 TIME...MOT...LOC 0104Z 265DEG 36KT 3883 10215 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ TT
088 WWUS53 KGLD 130119 SVSGLD Severe Weather Statement National Weather Service Goodland KS 719 PM MDT Sun Sep 12 2021 COC017-130130- /O.CON.KGLD.SV.W.0235.000000T0000Z-210913T0130Z/ Cheyenne CO- 719 PM MDT Sun Sep 12 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM MDT FOR SOUTHEASTERN CHEYENNE COUNTY IN EAST CENTRAL COLORADO... At 718 PM MDT, a severe thunderstorm was located 13 miles northwest of Towner, or 15 miles southeast of Cheyenne Wells, moving southeast at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Cheyenne Wells and Arapahoe. This includes Highway 385 between mile markers 136 and 154. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3883 10248 3899 10205 3862 10205 3862 10265 TIME...MOT...LOC 0118Z 317DEG 32KT 3864 10219 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ TT
704
WWUS53 KGLD 130126
SVSGLD
Severe Weather Statement
National Weather Service Goodland KS
726 PM MDT Sun Sep 12 2021
COC017-130135-
/O.EXP.KGLD.SV.W.0235.000000T0000Z-210913T0130Z/
Cheyenne CO-
726 PM MDT Sun Sep 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHEYENNE COUNTY
IN EAST CENTRAL COLORADO WILL EXPIRE AT 730 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. However gusty
winds are still possible with this thunderstorm.
LAT...LON 3883 10248 3899 10205 3862 10205 3862 10265
TIME...MOT...LOC 0125Z 265DEG 36KT 3865 10211
$$
TTThe office that day
Everything else NWS Goodland, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 7:07 PM MDT | Special Weather Statement | GLD | Kit Carson | 23 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2021Every 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.