Alert archive / Missouri / Mesoscale Discussions in 2013

Mesoscale Discussion 398

April 7, 20135 counties in Kansas; 15 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2013, 11:16 PM CDT for 5 counties in Kansas; 15 counties in Missouri. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Apr 7, 2013, 11:16 PM CDT (04:16 UTC)
Expired: Apr 8, 2013, 12:15 AM CDT
In force: 59 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Atchison County, KS, Doniphan County, KS, Jefferson County, KS, Leavenworth County, KS, Wyandotte County, KS, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Howard County, MO, Lafayette County, MO, Livingston County, MO, Platte County, MO, Randolph County, MO, Ray County, MO, Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 76 km from the middle of the area, began a volume at 04:19 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 00:00Z, 4.3 hours before the alert went out and 125 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: 54 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 1535 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 7:43 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Comanche, Edwards, Ellis, Ellsworth and 17 more	62 min
Apr 7, 9:27 PM CDT	Mesoscale Discussion	SPC	Greenwood, Harvey, Marion	63 min
Apr 8, 2:36 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Greeley, Hamilton, Kearny, Logan, Rawlins and 5 more	2 hr
Apr 8, 3:16 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Rawlins, Sherman	9 hr
Apr 8, 6:00 PM CDT	Mesoscale Discussion	SPC	Decatur, Jewell, Norton, Phillips, Rawlins, Smith	90 min
Apr 8, 6:09 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Sherman, Wallace	66 min
Apr 7, 8:38 PM CDT	Mesoscale Discussion	SPC	Crawford, Dent, Iron, Laclede, Phelps, Pulaski and 4 more	37 min

Nearby

Mesoscale Discussions in Missouri, 2013 Mesoscale Discussions in Kansas, 2013 Every mesoscale discussion in 2013

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.