Alert archive / Kansas / Special Weather Statements in 2021

Special Weather Statement, NWS Topeka, KS

August 31, 2021Brown County, Kansas

NWS Topeka, KS issued this special weather statement at Aug 31, 2021, 5:32 AM CDT for Brown County, Kansas. It was in force for 13 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: Aug 31, 2021, 5:32 AM CDT (10:32 UTC)
Expired: Aug 31, 2021, 5:45 AM CDT
In force: 13 min
Issued by: NWS Topeka, KS
Hail: 0.75 in
Wind: 40

County Brown County, KS

The radar

The Topeka radar (KTWX), 112 km from the middle of the area, began a volume at 10:32 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, 10.5 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-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: 1561 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1575 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 35 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 Topeka, KS wrote its last area forecast discussion before this special weather statement went out at Aug 31, 2:38 AM CDT, 2 hours 54 minutes earlier.

Area forecast discussion, Aug 31, 2:38 AM CDT, 2 hours 54 minutes before

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</head>
<body>
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Aug 31, 3:04 AM CDT, 2 hours 28 minutes before

Hazardous Weather Outlook
National Weather Service Topeka KS
304 AM CDT Tue Aug 31 2021

KSZ008>012-020>024-026-034>040-054>056-058-059-010815-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley-
Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson-
304 AM CDT Tue Aug 31 2021

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

.DAY ONE...Today and Tonight

Thunderstorms are possible, especially across far northeast Kansas
through the morning hours. Gusty winds and heavy rainfall will be
possible with the strongest storms.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

The probability for widespread hazardous weather is low.

.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, Aug 31, 5:32 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Topeka KS
532 AM CDT Tue Aug 31 2021

KSZ012-311045-
Brown-
532 AM CDT Tue Aug 31 2021

...A strong thunderstorm will impact portions of Brown County through
545 AM CDT...

At 532 AM CDT, Doppler radar was tracking a strong thunderstorm over
Hiawatha, moving southeast at 25 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Hiawatha, Horton, Everest, Robinson, Reserve, Hamlin and Willis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3965 9534 3965 9559 3993 9566 4000 9555
      4000 9534
TIME...MOT...LOC 1032Z 318DEG 22KT 3988 9552

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Jones

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 7:30 AM CDT	Severe Thunderstorm Warning	TOP	Marshall, Washington	25 min
Aug 31, 7:49 AM CDT	Special Weather Statement	TOP	Brown, Nemaha	26 min
Aug 31, 7:57 AM CDT	Special Weather Statement	TOP	Marshall, Washington	33 min
Aug 31, 8:10 AM CDT	Severe Thunderstorm Warning	TOP	Brown, Jackson, Nemaha	26 min
Aug 31, 8:35 AM CDT	Special Weather Statement	TOP	Jackson, Jefferson	25 min
Aug 31, 8:55 AM CDT	Special Weather Statement	TOP	Jefferson, Shawnee	35 min
Aug 31, 9:24 AM CDT	Special Weather Statement	TOP	Geary, Wabaunsee	36 min
Aug 31, 9:26 AM CDT	Special Weather Statement	TOP	Douglas, Franklin, Osage	34 min
Aug 31, 9:53 AM CDT	Special Weather Statement	TOP	Franklin, Osage	37 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.