Alert archive / Missouri / Severe Thunderstorm Watches in 2007

Severe Thunderstorm Watch 37

February 28, 200711 counties in Kansas; 22 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Feb 28, 2007, 6:37 PM CST for 11 counties in Kansas; 22 counties in Missouri. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Feb 28, 2007, 6:37 PM CST (00:37 UTC)
Expired: Mar 1, 2007, 1:47 AM CST
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 50 kt

All 33 counties

Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Grundy County, MO, Howard County, MO, Jackson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Platte County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Sullivan County, MO

The radar

The Pleasant Hill radar (KEAX), 76 km from the middle of the area, began a volume at 00:39 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 10%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 20%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 20%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Feb 28, 6:37 PM CST	Severe Thunderstorm Warning	EAX	Jackson	38 min
Feb 28, 7:02 PM CST	Severe Thunderstorm Warning	TOP	Douglas	28 min
Feb 28, 7:17 PM CST	Severe Thunderstorm Warning	EAX	Johnson, Wyandotte	28 min
Feb 28, 7:52 PM CST	Severe Thunderstorm Warning	EAX	Johnson, Miami	38 min
Feb 28, 7:57 PM CST	Flash Flood Warning	EAX	Johnson, Leavenworth, Wyandotte	8 hr
Feb 28, 7:57 PM CST	Flash Flood Warning	EAX	Johnson, Leavenworth, Miami, Wyandotte	8 hr
Feb 28, 8:50 PM CST	Flash Flood Warning	EAX	Carroll, Chariton, Grundy, Linn, Livingston, Sullivan	10 hr
Feb 28, 9:30 PM CST	Flash Flood Warning	EAX	Johnson, Linn, Miami	10 hr
Feb 28, 9:30 PM CST	Flash Flood Warning	EAX	Bates, Carroll, Cass, Henry, Jackson, Johnson and 2 more	10 hr
Feb 28, 9:41 PM CST	Severe Thunderstorm Warning	EAX	Cass, Jackson, Johnson	34 min
Feb 28, 10:20 PM CST	Severe Thunderstorm Warning	EAX	Johnson, Lafayette	40 min
Feb 28, 10:55 PM CST	Severe Thunderstorm Warning	EAX	Lafayette, Saline	35 min
Feb 28, 11:11 PM CST	Severe Thunderstorm Warning	EAX	Johnson, Miami	34 min
Feb 28, 11:13 PM CST	Tornado Warning	EAX	Cooper, Howard, Pettis, Saline	47 min
Feb 28, 11:15 PM CST	Severe Thunderstorm Warning	TOP	Douglas, Franklin	30 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 0.6 hours before the alert went out and 112 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2552 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 28, 6:11 PM CST	Mesoscale Discussion	SPC	Wyandotte	94 min
Feb 28, 6:50 PM CST	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford, Linn, Miami	85 min
Feb 28, 7:10 PM CST	Tornado Watch	SPC	Bourbon, Linn, Miami	7 hr
Feb 28, 7:46 PM CST	Mesoscale Discussion	SPC	Butler, Cowley	89 min
Feb 28, 9:48 PM CST	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Crawford, Douglas, Franklin and 3 more	87 min
Feb 28, 10:57 PM CST	Mesoscale Discussion	SPC	Chautauqua, Cowley, Elk	93 min
Mar 1, 1:32 AM CST	Tornado Watch	SPC	Bourbon, Cherokee, Crawford, Labette, Linn, Neosho	6 hr
Feb 28, 10:30 PM CST	Mesoscale Discussion	SPC	Audrain, Clark, Knox, Lewis, Marion, Monroe and 3 more	90 min
Feb 28, 11:48 PM CST	Mesoscale Discussion	SPC	Audrain, Lewis, Lincoln, Marion, Monroe, Montgomery and 3 more	57 min
Mar 1, 12:12 AM CST	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Howell and 15 more	2 hr
Mar 1, 12:16 AM CST	Severe Thunderstorm Watch	SPC	Audrain, Boone, Callaway, Knox, Lewis, Lincoln and 7 more	6 hr
Mar 1, 2:28 AM CST	Mesoscale Discussion	SPC	Audrain, Boone, Callaway, Cole, Knox, Lewis and 8 more	92 min
Mar 1, 3:35 AM CST	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 27 more	55 min
Mar 1, 3:58 AM CST	Tornado Watch	SPC	Bollinger, Butler, Cape Girardeau, Carter, Cole, Crawford and 35 more	8 hr

Nearby

Severe Thunderstorm Watches in Missouri, 2007 Severe Thunderstorm Watches in Kansas, 2007 Every severe thunderstorm watch in 2007

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.