Alert archive / Kansas / Special Weather Statements in 2021

Special Weather Statement, NWS Goodland, KS

July 16, 2021Sherman County, Kansas

NWS Goodland, KS issued this special weather statement at Jul 16, 2021, 10:42 PM MDT for Sherman County, Kansas. It was in force for 18 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
Jul 16, 2021, 10:42 PM MDT (04:42 UTC)
Expired
Jul 16, 2021, 11:00 PM MDT
In force
18 min
Issued by
NWS Goodland, KS

County Sherman County, KS

The radar

The Goodland radar (KGLD), 0 km from the middle of the area, began a volume at 04:44 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, 4.7 hours before the alert went out and 142 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-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2021-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2021-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
12 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
3284 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
-9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jul 16, 10:35 PM MDT, 7 minutes earlier.

Area forecast discussion, Jul 16, 10:35 PM MDT, 7 minutes before
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Hazardous weather outlook, Jul 16, 8:35 PM MDT, 2 hours 7 minutes before
Hazardous Weather Outlook
National Weather Service Goodland KS
835 PM MDT Fri Jul 16 2021

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-171200-
Yuma-Kit Carson-Cheyenne-Rawlins-Decatur-Norton-Sherman-Thomas-
Sheridan-Graham-Wallace-Logan-Gove-Greeley-Wichita-Dundy-Hitchcock-
Red Willow-
835 PM MDT Fri Jul 16 2021 /935 PM CDT Fri Jul 16 2021/

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

.DAY ONE...TONIGHT...

Showers and thunderstorms will continue this evening generally across
parts of far eastern Colorado and Wallace, Greeley and Wichita
counties in Kansas. The primary hazards include wind gusts to 50 mph
and locally heavy rainfall which may cause flooding of low lying and
poor drainage areas.

Strong thunderstorms in north central Nebraska may impact those east
of a line from Trenton to Hill City a few hours before sunrise
Saturday morning with strong northeast winds.

Fog will be possible a few hours either side of sunrise Saturday
morning east of a line from Wray to Goodland and Oakley.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY...

There is a chance for thunderstorms Saturday and Sunday during the
late afternoon and evening hours with a few potentially being
severe. Hail and wind would be the main threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

In the hours before

Special weather statement, Jul 16, 9:06 PM MDT, 1 hour 36 minutes before
Special Weather Statement
National Weather Service Goodland KS
906 PM MDT Fri Jul 16 2021

COZ091-092-170330-
Kit Carson County CO-Cheyenne County CO-
906 PM MDT Fri Jul 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CHEYENNE AND SOUTH
CENTRAL KIT CARSON COUNTIES IN EAST CENTRAL COLORADO UNTIL 930 PM
MDT...

At 906 PM MDT, Doppler radar was tracking a strong thunderstorm 15
miles south of Stratton, moving southeast at 20 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Cheyenne Wells and Firstview.

This includes Highway 385 between mile markers 151 and 172.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3905 10287 3925 10264 3902 10214 3873 10244
TIME...MOT...LOC 0306Z 316DEG 19KT 3908 10258

JN
Local storm report, Jul 16, 9:16 PM MDT, 1 hour 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
916 PM MDT FRI JUL 16 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0859 PM     FLASH FLOOD      BURLINGTON              39.30N 102.27W
07/16/2021                   KIT CARSON         CO   PUBLIC

            CORRECTS PREVIOUS FLASH FLOOD REPORT FROM
            BURLINGTON. 1.4 INCHES OF STORM TOTAL RAIN
            WAS REPORTED IN THE OWNERS RAIN GAUGE.
            REPORTED VIA SOCIAL MEDIA WITH PHOTO. HEAVY
            RAIN PRODUCED ENOUGH RAIN FOR WATER TO REACH
            THE RUNNING BOARDS ON A JEEP. ESTIMATED 4-6
            INCHES.

&&

KMK
Special weather statement, Jul 16, 9:32 PM MDT, 1 hour 10 minutes before
Special Weather Statement
National Weather Service Goodland KS
932 PM MDT Fri Jul 16 2021

COZ091-092-KSZ027-170400-
Kit Carson County CO-Cheyenne County CO-Wallace KS-
932 PM MDT Fri Jul 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CHEYENNE...SOUTHEASTERN
KIT CARSON COUNTIES IN EAST CENTRAL COLORADO AND NORTHWESTERN WALLACE
COUNTIES IN WEST CENTRAL KANSAS UNTIL 1000 PM MDT...

At 932 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles southeast of Vona to 3 miles southwest
of Cheyenne Wells. Movement was northeast at 10 mph.

Pea size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Burlington, Cheyenne Wells, Weskan, Bethune, Firstview and Arapahoe.

This includes the following highways...
 Interstate 70 in Colorado between mile markers 422 and 442.
 Highway 385 between mile markers 145 and 192.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3922 10281 3938 10223 3915 10205 3913 10205
      3913 10203 3889 10184 3870 10247
TIME...MOT...LOC 0332Z 222DEG 7KT 3919 10268 3877 10238

JN
Special weather statement, Jul 16, 9:34 PM MDT, 1 hour 8 minutes before
Special Weather Statement
National Weather Service Goodland KS
934 PM MDT Fri Jul 16 2021

KSZ027-028-041-170415-
Wallace KS-Greeley KS-Logan KS-
934 PM MDT Fri Jul 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WALLACE...
SOUTHWESTERN LOGAN AND NORTHEASTERN GREELEY COUNTIES UNTIL 1015 PM
MDT/1115 PM CDT/...

At 934 PM MDT/1034 PM CDT/, Doppler radar was tracking a strong
thunderstorm 6 miles south of Sharon Springs, moving southeast at 10
mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

This storm will remain over mainly rural areas of southeastern
Wallace, southwestern Logan and northeastern Greeley Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3861 10179 3883 10189 3892 10165 3872 10141
      3870 10149 3870 10157 3867 10157
TIME...MOT...LOC 0334Z 332DEG 7KT 3880 10172

JN
Special weather statement, Jul 16, 9:45 PM MDT, 57 minutes before
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Special weather statement, Jul 16, 10:42 PM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 7:56 PM MDTSpecial Weather StatementGLDWallace64 min
Jul 16, 8:39 PM MDTSpecial Weather StatementGLDWallace51 min
Jul 16, 9:34 PM MDTSpecial Weather StatementGLDWallace41 min
Jul 16, 9:45 PM MDTSpecial Weather StatementGLDGreeley60 min
Jul 16, 6:19 PM MDTSevere Thunderstorm WarningGLDKit Carson33 min
Jul 16, 6:23 PM MDTFlash Flood WarningGLDKit Carson84 min
Jul 16, 7:06 PM MDTSpecial Weather StatementGLDKit Carson54 min
Jul 16, 7:42 PM MDTSpecial Weather StatementGLDCheyenne48 min
Jul 16, 8:02 PM MDTSpecial Weather StatementGLDKit Carson58 min
Jul 16, 9:06 PM MDTSpecial Weather StatementGLDCheyenne24 min
Jul 16, 9:32 PM MDTSpecial Weather StatementGLDCheyenne28 min

Nearby

Special Weather Statements in Kansas, 2021Every 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.