Alert archive / Missouri / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 249, NWS Kansas City, MO

September 21, 2009Bates County, Henry County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Sep 21, 2009, 1:02 PM CDT for Bates County, Henry County, Missouri. 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: Sep 21, 2009, 1:02 PM CDT (18:02 UTC)
Expired: Sep 21, 2009, 1:30 PM CDT
In force: 28 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon

Counties Bates County, MO, Henry County, MO

The radar

The Pleasant Hill radar (KEAX), 57 km from the middle of the area, began a volume at 18:04 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

Topeka, KS (KTOP), launched 12:00Z, 6.0 hours before the alert went out and 156 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: 1007 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 822 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 21, 4:13 AM CDT	Dense Fog Advisory	EAX	Bates, Cass, Chariton, Cooper, Henry, Howard and 6 more	5 hr
Sep 21, 9:46 AM CDT	Areal Flood Advisory	EAX	Andrew, Buchanan, Holt, Platte	6 hr
Sep 21, 10:12 AM CDT	Areal Flood Advisory	EAX	Clay, Jackson, Platte	6 hr
Sep 21, 11:44 AM CDT	Areal Flood Advisory	EAX	Bates	6 hr
Sep 21, 12:55 PM CDT	Special Weather Statement	EAX	Bates	35 min
Sep 21, 1:13 PM CDT	Areal Flood Advisory	EAX	Henry, Johnson	6 hr
Sep 21, 1:20 PM CDT	Special Weather Statement	EAX	Henry	25 min
Sep 21, 9:33 AM CDT	Special Weather Statement	EAX	Johnson	27 min
Sep 21, 11:08 AM CDT	Areal Flood Advisory	EAX	Johnson, Miami	6 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2009 Every severe thunderstorm warning in 2009

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.