Alert archive / Kansas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 135, NWS Topeka, KS

June 21, 2010Jefferson County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 21, 2010, 10:01 AM CDT for Jefferson County, Kansas. It was in force for 29 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, 2010, 10:01 AM CDT (15:01 UTC)
Expired: Jun 21, 2010, 10:30 AM CDT
In force: 29 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Jefferson County, KS

The radar

The Topeka radar (KTWX), 78 km from the middle of the area, began a volume at 15:04 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

Omaha, NE (KOAX), launched 12:00Z, 3.0 hours before the alert went out and 246 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: 422 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -58 m²/s²
0-3 km storm-relative helicity: 299 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.3

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, 7:23 AM CDT, 2 hours 38 minutes earlier.

Area forecast discussion, Jun 21, 7:23 AM CDT, 2 hours 38 minutes before

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Hazardous weather outlook, Jun 21, 7:31 AM CDT, 2 hours 30 minutes before

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In the hours before

Special weather statement, Jun 21, 5:14 AM CDT, 4 hours 47 minutes before

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Special weather statement, Jun 21, 6:02 AM CDT, 3 hours 59 minutes before

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Special weather statement, Jun 21, 9:26 AM CDT, 35 minutes before

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Special weather statement, Jun 21, 9:57 AM CDT, 4 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 20, 7:35 PM CDT	Severe Thunderstorm Warning	TOP	Cloud, Ottawa, Republic	55 min
Jun 20, 7:46 PM CDT	Tornado Warning	TOP	Republic	29 min
Jun 20, 8:10 PM CDT	Tornado Warning	TOP	Cloud, Republic	35 min
Jun 20, 8:25 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Cloud, Geary, Marshall, Ottawa, Republic and 2 more	65 min
Jun 20, 8:35 PM CDT	Areal Flood Advisory	TOP	Cloud, Republic	115 min
Jun 20, 8:48 PM CDT	Tornado Warning	TOP	Washington	27 min
Jun 20, 9:24 PM CDT	Areal Flood Advisory	TOP	Clay, Washington	51 min
Jun 20, 9:24 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Geary, Marshall, Nemaha, Pottawatomie and 3 more	51 min
Jun 20, 9:46 PM CDT	Severe Thunderstorm Warning	TOP	Marshall, Nemaha	44 min
Jun 20, 10:14 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Marshall, Nemaha, Pottawatomie, Shawnee	46 min
Jun 20, 10:18 PM CDT	Areal Flood Advisory	TOP	Marshall, Nemaha	117 min
Jun 21, 7:02 AM CDT	Areal Flood Advisory	TOP	Clay, Cloud, Republic, Washington	88 min
Jun 21, 7:32 AM CDT	River Flood Warning	TOP	Marshall	55 hr
Jun 21, 7:43 AM CDT	Areal Flood Advisory	TOP	Clay, Marshall, Riley, Washington	92 min
Jun 21, 8:39 AM CDT	Areal Flood Advisory	TOP	Marshall, Nemaha, Pottawatomie	51 min
Jun 21, 10:32 AM CDT	River Flood Warning	TOP	Riley	13 hr
Jun 21, 10:32 AM CDT	River Flood Warning	TOP	Clay	37 hr
Jun 21, 3:25 PM CDT	Flash Flood Watch	TOP	Brown, Clay, Cloud, Jackson, Jefferson, Marshall and 5 more	13 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.