Alert archive / Kansas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 123, NWS Topeka, KS

June 28, 2020Brown County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 28, 2020, 4:50 AM CDT for Brown County, Kansas. It was in force for 25 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 28, 2020, 4:50 AM CDT (09:50 UTC)
Expired
Jun 28, 2020, 5:15 AM CDT
In force
25 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Brown County, KS

The radar

The Topeka radar (KTWX), 109 km from the middle of the area, began a volume at 09:51 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

Topeka, KS (KTOP), launched 00:00Z, 9.8 hours before the alert went out and 92 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, Topeka, KS at 00:00Z on 2020-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1397 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, Topeka, KS at 00:00Z on 2020-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 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
1397 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
1030 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.0

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 Topeka, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 28, 3:21 AM CDT, 1 hour 29 minutes earlier.

Area forecast discussion, Jun 28, 3:21 AM CDT, 1 hour 29 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, Jun 28, 4:37 AM CDT, 13 minutes before
Hazardous Weather Outlook
National Weather Service Topeka KS
437 AM CDT Sun Jun 28 2020

KSZ008>012-020>024-026-034>040-054>056-058-059-290945-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley-
Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson-
437 AM CDT Sun Jun 28 2020

This hazardous weather outlook is for east central...north
central and northeast Kansas.

.DAY ONE...Today and Tonight.

Scattered thunderstorms are expected across northeast and east
central Kansas this morning. Some storms may produce gusty winds
and locally heavy rainfall.

Afternoon heat indices will reach the 100 to 105 degree range
today.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Conditions will be hot and humid for much of this week, with
temperatures in the 90s and heat indices in the upper 90s to low
100s possible through Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

More detailed information can be accessed at...
http://www.weather.gov/top/sitrep

In the hours before

Special weather statement, Jun 28, 2:00 AM CDT, 2 hours 50 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, Jun 28, 2:16 AM CDT, 2 hours 34 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>
Special weather statement, Jun 28, 2:32 AM CDT, 2 hours 18 minutes before
Special Weather Statement
National Weather Service Topeka KS
232 AM CDT Sun Jun 28 2020

KSZ008-009-020-021-034-035-280800-
Republic-Clay-Cloud-Dickinson-Washington-Ottawa-
232 AM CDT Sun Jun 28 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN DICKINSON...
OTTAWA...SOUTHEASTERN REPUBLIC...SOUTHERN WASHINGTON...CLAY AND
EASTERN CLOUD COUNTIES UNTIL 300 AM CDT...

At 232 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southwest of Morrowville to 5 miles
north of Culver. Movement was east at 40 mph.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Concordia, Clay Center, Minneapolis, Clyde, Bennington, Clifton,
Miltonvale, Linn, Delphos, Greenleaf, Tescott, Morganville, Culver,
Wells, Palmer, Manchester, Longford, Agenda, Aurora and Vining.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3918 9793 3976 9749 3974 9687 3891 9738
      3893 9738 3894 9737 3896 9737 3896 9793
TIME...MOT...LOC 0732Z 273DEG 33KT 3976 9723 3904 9774

Skow
Special weather statement, Jun 28, 2:58 AM CDT, 1 hour 52 minutes before
Special Weather Statement
National Weather Service Topeka KS
258 AM CDT Sun Jun 28 2020

KSZ009-010-021>023-034>036-280830-
Geary-Clay-Pottawatomie-Dickinson-Riley-Washington-Ottawa-Marshall-
258 AM CDT Sun Jun 28 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN DICKINSON...WESTERN
GEARY...RILEY...EASTERN OTTAWA...NORTHWESTERN POTTAWATOMIE...
WASHINGTON...CLAY AND MARSHALL COUNTIES UNTIL 330 AM CDT...

At 257 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 3 miles south of Odell to 5 miles northeast of
Niles. Movement was east at 40 mph.

Winds in excess of 40 to 45 mph will be possible with these storms.

Locations impacted include...
Junction City, Abilene, Clay Center, Marysville, Washington, Blue
Rapids, Chapman, Wakefield, Riley, Frankfort, Hanover, Waterville,
Clifton, Milford, Leonardville, Linn, Greenleaf, Olsburg, Beattie and
Morganville.

This includes Interstate 70 between mile markers 277 and 295.

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 4000 9624 3889 9692 3902 9759 3931 9743
      3931 9737 3942 9737 4000 9704
TIME...MOT...LOC 0757Z 278DEG 37KT 4000 9680 3900 9738

Skow
Special weather statement, Jun 28, 3:27 AM CDT, 1 hour 23 minutes before
Special Weather Statement
National Weather Service Topeka KS
327 AM CDT Sun Jun 28 2020

KSZ010-011-021>023-035-036-280915-
Geary-Clay-Pottawatomie-Dickinson-Riley-Nemaha-Marshall-
327 AM CDT Sun Jun 28 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DICKINSON...GEARY...
RILEY...CENTRAL POTTAWATOMIE...WESTERN NEMAHA...SOUTHEASTERN CLAY AND
EASTERN MARSHALL COUNTIES UNTIL 415 AM CDT...

At 327 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 3 miles northwest of Summerfield to 6 miles
south of Blue Rapids to near Abilene. Movement was east at 35 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Manhattan, Junction City, Abilene, Seneca, Westmoreland, Blaine,
Ogden, Grandview Plaza, Chapman, Riley, Enterprise, Frankfort,
Milford, Centralia, Axtell, Olsburg, Beattie, Bern, Randolph and
Summerfield.

This includes Interstate 70 between mile markers 276 and 313.

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 3951 9617 3887 9671 3886 9689 3891 9723
      3959 9666 4000 9641 4000 9587
TIME...MOT...LOC 0827Z 279DEG 31KT 4003 9640 3959 9667 3895 9722
Special weather statement, Jun 28, 4:16 AM CDT, 34 minutes before
Special Weather Statement
National Weather Service Topeka KS
416 AM CDT Sun Jun 28 2020

KSZ011-012-022>024-036>038-281000-
Wabaunsee-Geary-Pottawatomie-Brown-Riley-Jackson-Nemaha-Morris-
416 AM CDT Sun Jun 28 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GEARY...SOUTHEASTERN
RILEY...NORTHEASTERN MORRIS...WESTERN WABAUNSEE...EASTERN
POTTAWATOMIE...WESTERN JACKSON...SOUTHEASTERN NEMAHA AND BROWN
COUNTIES UNTIL 500 AM CDT...

At 416 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles north of Sabetha to 7 miles northwest
of White City. Movement was east at 30 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Southeastern Manhattan, Wamego, Hiawatha, Sabetha, Alma, St. Marys,
Onaga, St. George, Alta Vista, Wetmore, Dwight, Fairview, McFarland,
Morrill, Paxico, Belvue, Emmett, Louisville, Circleville and Corning.

This includes Interstate 70 between mile markers 308 and 335.

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 3993 9534 3922 9600 3922 9604 3918 9604
      3879 9639 3887 9683 3944 9635 4000 9582
      4000 9534
TIME...MOT...LOC 0916Z 285DEG 26KT 4000 9582 3888 9682

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 1:27 AM CDTSpecial Weather StatementTOPCloud, Republic33 min
Jun 28, 1:45 AM CDTSevere Thunderstorm WarningTOPRepublic30 min
Jun 28, 2:00 AM CDTSpecial Weather StatementTOPCloud, Republic, Washington30 min
Jun 28, 2:15 AM CDTSevere Thunderstorm WarningTOPRepublic, Washington45 min
Jun 28, 2:32 AM CDTSpecial Weather StatementTOPClay, Cloud, Ottawa28 min
Jun 28, 2:58 AM CDTSpecial Weather StatementTOPClay, Marshall, Riley, Washington32 min
Jun 28, 3:27 AM CDTSpecial Weather StatementTOPGeary, Marshall, Nemaha, Pottawatomie, Riley48 min
Jun 28, 4:16 AM CDTSpecial Weather StatementTOPBrown, Nemaha, Pottawatomie44 min
Jun 28, 5:14 AM CDTSpecial Weather StatementTOPJackson, Shawnee46 min
Jun 28, 6:10 AM CDTSpecial Weather StatementTOPJackson35 min
Jun 28, 6:28 AM CDTSevere Thunderstorm WarningTOPJackson, Shawnee30 min
Jun 28, 7:00 AM CDTSpecial Weather StatementTOPShawnee30 min
Jun 28, 7:08 AM CDTSpecial Weather StatementTOPWabaunsee22 min
Jun 28, 8:11 AM CDTAreal Flood AdvisoryTOPShawnee, Wabaunsee94 min
Jun 28, 11:53 AM CDTRiver Flood WarningTOPMarshall12 hr
Jun 28, 2:00 PM CDTRiver Flood WarningTOPMarshall55 hr

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.