Alert archive / Kansas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 208, NWS Goodland, KS

August 7, 2020Decatur County, Sheridan County, Thomas County, Kansas

NWS Goodland, KS issued this severe thunderstorm warning at Aug 7, 2020, 1:34 AM CDT for Decatur County, Sheridan County, Thomas County, Kansas. It was in force for 24 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
Aug 7, 2020, 1:34 AM CDT (06:34 UTC)
Expired
Aug 7, 2020, 1:58 AM CDT
In force
24 min
Issued by
NWS Goodland, KS
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Decatur County, KS, Sheridan County, KS, Thomas County, KS

The radar

The Goodland radar (KGLD), 91 km from the middle of the area, began a volume at 06:37 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

Dodge City, (KDDC), launched 00:00Z, 6.6 hours before the alert went out and 203 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, Dodge City, at 00:00Z on 2020-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1373 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, Dodge City, at 00:00Z on 2020-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
1373 J/kg
Mixed-layer CIN
-177 J/kg
Mixed-layer LCL
1175 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

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 Aug 7, 12:50 AM CDT, 44 minutes earlier.

Area forecast discussion, Aug 7, 12:50 AM CDT, 44 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Aug 6, 8:34 PM CDT, 5 hours before
Hazardous Weather Outlook
National Weather Service Goodland KS
734 PM MDT Thu Aug 6 2020

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-080145-
Yuma County-Kit Carson County-Cheyenne County-Cheyenne-Rawlins-
Decatur-Norton-Sherman-Thomas-Sheridan-Graham-Wallace-Logan-Gove-
Greeley-Wichita-Dundy-Hitchcock-Red Willow-
734 PM MDT Thu Aug 6 2020 /834 PM CDT Thu Aug 6 2020/

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

.DAY ONE...TODAY...

Strong to severe thunderstorms may occur south of I-70 this evening.
The main threats will be hail up to quarter size, wind gusts up to
60 MPH, and heavy rainfall.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH THURSDAY...

Elevated fire weather conditions are possible over eastern Colorado
as minimum relative humidity values drop below 15 percent Friday
afternoon.

Isolated severe thunderstorms are possible north of Interstate 70
Saturday afternoon and evening.

Heat Index values in the lower 100s are also possible east of a line
from McCook, Nebraska to Gove, Kansas where ambient temperatures in
the upper 90s will combine with dewpoint temperatures in the middle
60s.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Any weather reports by phone or
social media are appreciated.

JTL

In the hours before

Special weather statement, Aug 6, 9:08 PM CDT, 4 hours 26 minutes before
Special Weather Statement
National Weather Service Goodland KS
808 PM MDT Thu Aug 6 2020

COZ092-070245-
Cheyenne County CO-
808 PM MDT Thu Aug 6 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CHEYENNE COUNTY IN
EAST CENTRAL COLORADO UNTIL 845 PM MDT...

At 808 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles south of Boyero, or 36 miles south of Flagler, moving southeast
at 25 mph.

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

Locations impacted include...
Kit Carson, Wild Horse and Aroya.

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 3869 10317 3869 10316 3893 10316 3878 10276
      3861 10294 3861 10317
TIME...MOT...LOC 0208Z 305DEG 21KT 3879 10324

JRM
Special weather statement, Aug 6, 10:06 PM CDT, 3 hours 28 minutes before
Special Weather Statement
National Weather Service Goodland KS
906 PM MDT Thu Aug 6 2020

COZ092-070330-
Cheyenne County CO-
906 PM MDT Thu Aug 6 2020

...SIGNIFICANT WEATHER ADVISORY FOR CHEYENNE COUNTY IN EAST CENTRAL
COLORADO UNTIL 930 PM MDT...

At 906 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 13 miles northwest of Cheyenne Wells to 7 miles
southeast of Kit Carson to 12 miles northwest of Eads. Movement was
east at 25 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Cheyenne Wells, Kit Carson, Firstview, Wild Horse and Arapahoe.

This includes Highway 385 between mile markers 136 and 169.

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.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3899 10298 3904 10254 3904 10208 3862 10223
      3861 10309
TIME...MOT...LOC 0306Z 281DEG 23KT 3897 10251 3872 10267 3859 10296

JRM
Special weather statement, Aug 6, 10:34 PM CDT, 3 hours before
Special Weather Statement
National Weather Service Goodland KS
934 PM MDT Thu Aug 6 2020

COZ092-KSZ027-041-070400-
Cheyenne County CO-Wallace KS-Greeley KS-
934 PM MDT Thu Aug 6 2020

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CHEYENNE COUNTY IN EAST
CENTRAL COLORADO...SOUTHWESTERN WALLACE AND NORTHWESTERN GREELEY
COUNTIES IN WEST CENTRAL KANSAS UNTIL 1000 PM MDT...

At 934 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles northeast of Cheyenne Wells to 18 miles
northeast of Brandon to 11 miles north of Sheridan Lake. Movement was
east at 35 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

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

This includes Highway 385 between mile markers 136 and 162.

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.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3852 10204 3862 10205 3861 10252 3899 10257
      3901 10180 3863 10179 3849 10181
TIME...MOT...LOC 0334Z 277DEG 31KT 3892 10230 3869 10228 3862 10236

JRM
Special weather statement, Aug 6, 11:13 PM CDT, 2 hours 21 minutes before
Special Weather Statement
National Weather Service Goodland KS
1013 PM MDT Thu Aug 6 2020

KSZ027-028-041-042-070445-
Wichita KS-Wallace KS-Greeley KS-Logan KS-
1013 PM MDT Thu Aug 6 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN WICHITA...SOUTHERN
WALLACE...SOUTHWESTERN LOGAN AND NORTHERN GREELEY COUNTIES UNTIL 1045
PM MDT/1145 PM CDT/...

At 1013 PM MDT/1113 PM CDT/, Doppler radar was tracking strong
thunderstorms along a line extending from 5 miles east of Weskan to
12 miles northwest of Tribune to 10 miles northwest of Horace.
Movement was east at 25 mph.

Pea size hail and wind gusts up to 50 mph will be possible with these
storms.

Locations impacted include...
Leoti, Sharon Springs, Tribune, Weskan, Horace, Wallace and Selkirk.

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 3846 10204 3895 10204 3896 10138 3846 10133
      3841 10157
TIME...MOT...LOC 0413Z 280DEG 22KT 3887 10187 3864 10186 3857 10194

JRM
Special weather statement, Aug 7, 12:04 AM CDT, 1 hour 30 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Local storm report, Aug 7, 12:07 AM CDT, 1 hour 27 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 11:13 PM CDTSpecial Weather StatementGLDGreeley, Wallace, Wichita32 min
Aug 7, 12:04 AM CDTSpecial Weather StatementGLDSherman41 min
Aug 7, 1:57 AM CDTSpecial Weather StatementGLDDecatur48 min
Aug 6, 9:08 PM CDTSpecial Weather StatementGLDCheyenne37 min
Aug 6, 9:27 PM CDTSevere Thunderstorm WarningGLDCheyenne48 min
Aug 6, 10:06 PM CDTSpecial Weather StatementGLDCheyenne24 min
Aug 6, 10:34 PM CDTSpecial Weather StatementGLDCheyenne26 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2020Every 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.