Alert archive / Kansas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 108, NWS Topeka, KS

June 21, 2015Brown County, Jackson County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 21, 2015, 1:47 PM CDT for Brown County, Jackson County, Kansas. It was in force for 28 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 21, 2015, 1:47 PM CDT (18:47 UTC)
Expired: Jun 21, 2015, 2:15 PM CDT
In force: 28 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Brown County, KS, Jackson County, KS

The radar

The Topeka radar (KTWX), 84 km from the middle of the area, began a volume at 18:46 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
Jun 21, 12:12 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 6.8 hours before the alert went out and 69 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: 1785 J/kg
Mixed-layer CIN: -241 J/kg
Mixed-layer LCL: 1089 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 21, 12:37 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jun 21, 12:37 PM CDT, 1 hour 10 minutes before

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Hazardous weather outlook, Jun 21, 1:03 PM CDT, 44 minutes before

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In the hours before

Local storm report, Jun 21, 11:39 AM CDT, 2 hours 8 minutes before

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Local storm report, Jun 21, 11:44 AM CDT, 2 hours 3 minutes before

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Special weather statement, Jun 21, 11:54 AM CDT, 1 hour 53 minutes before

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Local storm report, Jun 21, 12:04 PM CDT, 1 hour 43 minutes before

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Special weather statement, Jun 21, 1:13 PM CDT, 34 minutes before

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Special weather statement, Jun 21, 1:42 PM CDT, 5 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
Jun 21, 10:17 AM CDT	Special Weather Statement	TOP	Nemaha	43 min
Jun 21, 10:43 AM CDT	Special Weather Statement	TOP	Brown	32 min
Jun 21, 10:56 AM CDT	Special Weather Statement	TOP	Marshall	34 min
Jun 21, 11:03 AM CDT	Severe Thunderstorm Warning	TOP	Marshall, Washington	27 min
Jun 21, 11:20 AM CDT	Special Weather Statement	TOP	Brown	25 min
Jun 21, 11:25 AM CDT	Severe Thunderstorm Warning	TOP	Marshall	50 min
Jun 21, 11:30 AM CDT	Severe Thunderstorm Warning	TOP	Brown, Nemaha	40 min
Jun 21, 11:54 AM CDT	Special Weather Statement	TOP	Brown	36 min
Jun 21, 12:12 PM CDT	Severe Thunderstorm Warning	TOP	Marshall, Nemaha	27 min
Jun 21, 1:13 PM CDT	Special Weather Statement	TOP	Nemaha	32 min
Jun 21, 1:42 PM CDT	Special Weather Statement	TOP	Brown	18 min
Jun 21, 1:57 PM CDT	Special Weather Statement	TOP	Pottawatomie, Wabaunsee	33 min
Jun 21, 2:28 PM CDT	Special Weather Statement	TOP	Shawnee	32 min
Jun 21, 2:52 PM CDT	Special Weather Statement	TOP	Douglas	38 min
Jun 21, 3:53 PM CDT	Heat Advisory	TOP	Brown, Clay, Cloud, Dickinson, Douglas, Franklin and 14 more	27 hr

Nearby

Severe Thunderstorm Warnings in Kansas, 2015 Every severe thunderstorm warning in 2015

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.