Alert archive / Missouri / Mesoscale Discussions in 2017

Mesoscale Discussion 1715

October 14, 201720 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Oct 14, 2017, 6:23 PM CDT for 20 counties in Missouri. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Oct 14, 2017, 6:23 PM CDT (23:23 UTC)
Expired: Oct 14, 2017, 8:00 PM CDT
In force: 97 min
Issued by: the Storm Prediction Center

Counties Audrain County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Cooper County, MO, Henry County, MO, Howard County, MO, Johnson County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Morgan County, MO, Pettis County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saline County, MO, Shelby County, MO

The radar

The Pleasant Hill radar (KEAX), 139 km from the middle of the area, began a volume at 23:24 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 (KFOE), launched 12:00Z, 11.4 hours before the alert went out and 255 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: 448 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 324 m²/s²
0-3 km storm-relative helicity: 274 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 14, 4:21 AM CDT	Mesoscale Discussion	SPC	Atchison	84 min
Oct 14, 2:40 PM CDT	Mesoscale Discussion	SPC	Platte	3 hr
Oct 14, 3:35 PM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Buchanan, Caldwell, Carroll, Chariton and 31 more	2 hr
Oct 14, 4:45 PM CDT	Severe Thunderstorm Watch	SPC	Vernon	5 hr
Oct 14, 5:09 PM CDT	Tornado Watch	SPC	Adair, Audrain, Bates, Boone, Caldwell, Carroll and 31 more	8 hr

Nearby

Mesoscale Discussions in Missouri, 2017 Every mesoscale discussion in 2017

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.