Alert archive / Kansas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 134, NWS Topeka, KS

August 3, 2013Coffey County, Osage County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Aug 3, 2013, 12:35 AM CDT for Coffey County, Osage County, Kansas. It was in force for 40 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 3, 2013, 12:35 AM CDT (05:35 UTC)
Expired: Aug 3, 2013, 1:15 AM CDT
In force: 40 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Coffey County, KS, Osage County, KS

The radar

The Topeka radar (KTWX), 75 km from the middle of the area, began a volume at 05:37 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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 2, 7:15 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 5.6 hours before the alert went out and 62 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: 2659 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 3.1
Supercell composite: 17.9

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 Aug 3, 12:25 AM CDT, 10 minutes earlier.

Area forecast discussion, Aug 3, 12:25 AM CDT, 10 minutes before

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Hazardous weather outlook, Aug 2, 7:38 PM CDT, 4 hours 57 minutes before

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In the hours before

Local storm report, Aug 2, 11:51 PM CDT, 44 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
Aug 2, 11:24 PM CDT	Severe Thunderstorm Warning	TOP	Dickinson, Morris	51 min
Aug 2, 11:56 PM CDT	Severe Thunderstorm Warning	TOP	Lyon	49 min
Aug 3, 1:14 AM CDT	Severe Thunderstorm Warning	TOP	Anderson, Coffey, Franklin, Osage	61 min
Aug 3, 9:08 AM CDT	River Flood Warning	TOP	Coffey, Lyon	5 days
Aug 3, 4:03 PM CDT	Flood Watch	TOP	Anderson, Clay, Cloud, Coffey, Dickinson, Geary and 3 more	21 hr

Nearby

Severe Thunderstorm Warnings in Kansas, 2013 Every severe thunderstorm warning in 2013

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.