Alert archive / Kansas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 231, NWS Topeka, KS

September 13, 2010Ottawa County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Sep 13, 2010, 11:59 PM CDT for Ottawa County, Kansas. It was in force for 17 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: Sep 13, 2010, 11:59 PM CDT (04:59 UTC)
Expired: Sep 14, 2010, 12:16 AM CDT
In force: 17 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Ottawa County, KS

The radar

The Topeka radar (KTWX), 123 km from the middle of the area, began a volume at 05:01 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 13, 9:58 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 5.0 hours before the alert went out and 174 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: 1958 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 4.9

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 Sep 13, 11:55 PM CDT, 4 minutes earlier.

Area forecast discussion, Sep 13, 11:55 PM CDT, 4 minutes before

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Hazardous weather outlook, Sep 13, 9:45 PM CDT, 2 hours 14 minutes before

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In the hours before

Local storm report, Sep 13, 8:30 PM CDT, 3 hours 29 minutes before

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Special weather statement, Sep 13, 8:48 PM CDT, 3 hours 11 minutes before

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Special weather statement, Sep 13, 8:51 PM CDT, 3 hours 8 minutes before

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Local storm report, Sep 13, 9:14 PM CDT, 2 hours 45 minutes before

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Special weather statement, Sep 13, 11:12 PM CDT, 47 minutes before

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Local storm report, Sep 13, 11:48 PM CDT, 11 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 7:14 PM CDT	Tornado Warning	TOP	Marshall, Pottawatomie, Riley, Washington	46 min
Sep 13, 7:24 PM CDT	Severe Thunderstorm Warning	TOP	Brown, Nemaha	51 min
Sep 13, 7:59 PM CDT	Severe Thunderstorm Warning	TOP	Marshall, Pottawatomie, Riley	41 min
Sep 13, 8:48 PM CDT	Special Weather Statement	TOP	Jefferson	42 min
Sep 13, 8:51 PM CDT	Special Weather Statement	TOP	Marshall	24 min
Sep 13, 11:12 PM CDT	Special Weather Statement	TOP	Cloud, Ottawa	48 min
Sep 13, 11:30 PM CDT	Severe Thunderstorm Warning	TOP	Ottawa	30 min
Sep 14, 12:29 AM CDT	Special Weather Statement	TOP	Dickinson	46 min
Sep 14, 3:45 AM CDT	River Flood Warning	TOP	Marshall	10 hr
Sep 14, 4:09 AM CDT	Areal Flood Advisory	TOP	Lyon	111 min
Sep 14, 4:53 AM CDT	River Flood Warning	TOP	Marshall	5 hr

Nearby

Severe Thunderstorm Warnings in Kansas, 2010 Every severe thunderstorm warning in 2010

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.