Alert archive / Kansas / Special Weather Statements in 2021

Special Weather Statement, NWS Goodland, KS

September 12, 2021Cheyenne County, Kansas

NWS Goodland, KS issued this special weather statement at Sep 12, 2021, 2:33 AM CDT for Cheyenne County, Kansas. It was in force for 27 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: Sep 12, 2021, 2:33 AM CDT (07:33 UTC)
Expired: Sep 12, 2021, 3:00 AM CDT
In force: 27 min
Issued by: NWS Goodland, KS
Hail: 0.25 in
Wind: 30

County Cheyenne County, KS

The radar

The Goodland radar (KGLD), 39 km from the middle of the area, began a volume at 07:33 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, 7.6 hours before the alert went out and 143 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: 403 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 3631 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Sep 12, 12:36 AM CDT, 1 hour 57 minutes earlier.

Area forecast discussion, Sep 12, 12:36 AM CDT, 1 hour 57 minutes before

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Hazardous weather outlook, Sep 11, 9:28 PM CDT, 5 hours 5 minutes before

Hazardous Weather Outlook
National Weather Service Goodland KS
828 PM MDT Sat Sep 11 2021

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-121645-
Yuma-Kit Carson-Cheyenne-Rawlins-Decatur-Norton-Sherman-Thomas-
Sheridan-Graham-Wallace-Logan-Gove-Greeley-Wichita-Dundy-Hitchcock-
Red Willow-
828 PM MDT Sat Sep 11 2021 /928 PM CDT Sat Sep 11 2021/

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

.DAY ONE...TODAY...

Isolated thunderstorms will track across northeast Colorado this
evening. Gusty and potentially damaging winds cannot be ruled out in
association with any thunderstorms, mainly over northeast Colorado
and adjacent Kansas and Nebraska border counties between 7 PM and 11
PM MDT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH SATURDAY...

Severe thunderstorms are possible late Sunday afternoon and evening
from 5 PM MDT to 10 PM MDT, mainly in northeast Colorado and
adjacent Kansas and Nebraska border counties. The primary hazards
are wind gusts up to 65 mph and hail up to one inch in diameter.

Elevated fire weather conditions are possible Monday afternoon south
of a line from Flagler to Tribune and Leoti.

Elevated fire weather conditions are possible Thursday afternoon
across far eastern Colorado.

Elevated fire weather conditions are possible Saturday afternoon
along and west of Highway 25.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be required.

In the hours before

Special weather statement, Sep 11, 10:32 PM CDT, 4 hours 1 minute before

Special Weather Statement
National Weather Service Goodland KS
932 PM MDT Sat Sep 11 2021

COZ090>092-120400-
Kit Carson County CO-Cheyenne County CO-Yuma County CO-
932 PM MDT Sat Sep 11 2021

...Strong thunderstorms will impact portions of western Cheyenne
County in east central Colorado, Yuma County in northeastern Colorado
and Kit Carson Counties in east central Colorado through 1000 PM
MDT...

At 929 PM MDT, Doppler radar was tracking the outflow from
thunderstorms along a line extending from 8 miles east of Lone Star
to 8 miles south of Yuma to 6 miles north of Seibert to 13 miles
south of Flagler.
Movement was east at 45 mph.

HAZARD...Wind gusts between 30 and 40 mph and occasional lightning.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Strong thunderstorms will be near...
  Vona around 935 PM MDT.
  Stratton around 945 PM MDT.

Other locations in the path of these storms include Bethune.

This includes the following highways...
 Interstate 70 in Colorado between mile markers 391 and 440.
 Highway 385 between mile markers 160 and 165, and between mile
markers 171 and 261.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3957 10314 3957 10280 4025 10279 4032 10276
      4032 10214 3950 10216 3901 10229 3863 10269
      3871 10316
TIME...MOT...LOC 0329Z 276DEG 39KT 4034 10268 4000 10269 3938 10283
3911 10311

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

Lockhart

Special weather statement, Sep 11, 11:13 PM CDT, 3 hours 20 minutes before

Special Weather Statement
National Weather Service Goodland KS
1013 PM MDT Sat Sep 11 2021

COZ090>092-KSZ001-013-120445-
Kit Carson County CO-Cheyenne County CO-Yuma County CO-Sherman KS-
Cheyenne KS-
1013 PM MDT Sat Sep 11 2021

...Thunderstorm outflow winds will impact portions of northeastern
Cheyenne County in east central Colorado, southeastern Yuma County
in northeastern Colorado, eastern Kit Carson County in east central
Colorado, western Cheyenne and western Sherman Counties in
northwestern Kansas through 1045 PM MDT/1145 PM CDT/...

At 1011 PM MDT/1111 PM CDT/, Doppler radar was tracking strong
thunderstorm outflow winds along a line extending from 11 miles
south of Wray to 3 miles northeast of Bethune to 13 miles northwest
of Cheyenne Wells.
Movement was east at 30 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Strong thunderstorms will be near...
  Burlington around 1025 PM MDT.

Other locations in the path of these storms include Kanorado.

This includes the following highways...
 Interstate 70 in Kansas between mile markers 0 and 4.
 Interstate 70 in Colorado between mile markers 423 and 450.
 Highway 385 between mile markers 150 and 233.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3993 10231 3998 10176 3932 10196 3877 10217
      3891 10268
TIME...MOT...LOC 0411Z 270DEG 27KT 3991 10221 3933 10237 3892 10257

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Lockhart

Special weather statement, Sep 11, 11:46 PM CDT, 2 hours 47 minutes before

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Special weather statement, Sep 12, 12:15 AM CDT, 2 hours 18 minutes before

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Special weather statement, Sep 12, 12:57 AM CDT, 1 hour 36 minutes before

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Special weather statement, Sep 12, 2:33 AM CDT, 0 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
Sep 11, 11:46 PM CDT	Special Weather Statement	GLD	Sherman	29 min
Sep 12, 12:15 AM CDT	Special Weather Statement	GLD	Cheyenne, Rawlins, Sherman	45 min
Sep 12, 12:57 AM CDT	Special Weather Statement	GLD	Logan, Thomas	33 min
Sep 11, 10:32 PM CDT	Special Weather Statement	GLD	Cheyenne, Kit Carson, Yuma	28 min
Sep 11, 11:13 PM CDT	Special Weather Statement	GLD	Kit Carson	32 min
Sep 12, 5:35 PM CDT	Special Weather Statement	GLD	Kit Carson	25 min
Sep 12, 5:59 PM CDT	Special Weather Statement	GLD	Kit Carson	31 min
Sep 12, 6:06 PM CDT	Severe Thunderstorm Warning	GLD	Kit Carson	54 min
Sep 12, 6:44 PM CDT	Severe Thunderstorm Warning	GLD	Cheyenne, Kit Carson	61 min
Sep 12, 6:58 PM CDT	Severe Thunderstorm Warning	GLD	Kit Carson, Yuma	47 min

Nearby

Special Weather Statements in Kansas, 2021 Every special weather statement 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.