Alert archive / Kansas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 20, NWS Topeka, KS

April 6, 20104 counties in Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Apr 6, 2010, 3:14 PM CDT for 4 counties in Kansas. It was in force for 46 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: Apr 6, 2010, 3:14 PM CDT (20:14 UTC)
Expired: Apr 6, 2010, 4:00 PM CDT
In force: 46 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lyon County, KS, Morris County, KS, Osage County, KS, Wabaunsee County, KS

The radar

The Topeka radar (KTWX), 35 km from the middle of the area, began a volume at 20:15 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
Apr 6, 2:08 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 8.2 hours before the alert went out and 59 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: 1743 J/kg
Mixed-layer CIN: -254 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 522 m²/s²
0-3 km storm-relative helicity: 542 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 Apr 6, 3:11 PM CDT, 3 minutes earlier.

Area forecast discussion, Apr 6, 3:11 PM CDT, 3 minutes before

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Hazardous weather outlook, Apr 6, 2:29 PM CDT, 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TOPEKA KS
229 PM CDT TUE APR 6 2010

KSZ008>012-020>024-026-034>040-054>056-058-059-071930-
REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY-
POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS-
WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON-
229 PM CDT TUE APR 6 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL...NORTH
CENTRAL AND NORTHEAST KANSAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SEVERE THUNDERSTORMS WILL DEVELOP ALONG A DRYLINE ACROSS EAST
CENTRAL KANSAS. THESE STORMS WILL BE CAPABLE OF LARGE DAMAGING
HAIL UP TO THE SIZE OF GOLF BALLS AS WELL AS WINDS OF 60 TO 70
MPH. AN ISOLATED TORNADO CAN NOT BE RULED OUT.

FIRE DANGER WILL REMAIN IN THE VERY HIGH TO EXTREME CATEGORY
ACROSS THE AREA THROUGH THE EVENING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS SHOULD REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR
TO THE NATIONAL WEATHER SERVICE IN TOPEKA.

WOLTERS

In the hours before

Local storm report, Apr 6, 3:12 PM CDT, 2 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
Apr 5, 7:31 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Marshall, Riley, Washington	29 min
Apr 5, 7:43 PM CDT	Severe Thunderstorm Warning	TOP	Brown, Nemaha	18 min
Apr 5, 7:53 PM CDT	Severe Thunderstorm Warning	TOP	Marshall	37 min
Apr 5, 8:08 PM CDT	Severe Thunderstorm Warning	TOP	Washington	52 min
Apr 5, 8:26 PM CDT	Severe Thunderstorm Warning	TOP	Cloud, Republic, Washington	34 min
Apr 5, 8:44 PM CDT	Severe Thunderstorm Warning	TOP	Marshall, Washington	31 min
Apr 5, 8:58 PM CDT	Tornado Warning	TOP	Washington	32 min
Apr 5, 9:13 PM CDT	Severe Thunderstorm Warning	TOP	Marshall	17 min
Apr 5, 9:18 PM CDT	Tornado Warning	TOP	Marshall, Washington	27 min
Apr 5, 9:38 PM CDT	Severe Thunderstorm Warning	TOP	Marshall	11 min
Apr 6, 2:38 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Morris, Osage, Wabaunsee	37 min
Apr 6, 3:04 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson, Osage, Shawnee, Wabaunsee	41 min
Apr 6, 3:43 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson, Osage, Shawnee, Wabaunsee	47 min
Apr 6, 3:47 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Franklin, Lyon, Osage	43 min
Apr 6, 4:09 PM CDT	Areal Flood Advisory	TOP	Lyon	111 min
Apr 6, 4:24 PM CDT	Areal Flood Advisory	TOP	Douglas	81 min
Apr 6, 4:28 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson	22 min
Apr 6, 4:52 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Franklin, Lyon, Osage, Shawnee	38 min
Apr 6, 5:29 PM CDT	Areal Flood Advisory	TOP	Lyon	2 hr
Apr 6, 6:41 PM CDT	Severe Thunderstorm Warning	TOP	Coffey, Lyon	49 min

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.