Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 1705

September 9, 2014Atchison County, Kansas; 10 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Sep 9, 2014, 11:28 PM CDT for Atchison County, Kansas; 10 counties in Missouri. It was in force for 32 min.

The area

The outline as issued.

The facts

Issued: Sep 9, 2014, 11:28 PM CDT (04:28 UTC)
Expired: Sep 10, 2014, 12:00 AM CDT
In force: 32 min
Issued by: the Storm Prediction Center

Counties Atchison County, KS, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Linn County, MO, Livingston County, MO, Platte County, MO, Ray County, MO

The radar

The Pleasant Hill radar (KEAX), 92 km from the middle of the area, began a volume at 04:32 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 00:00Z, 4.5 hours before the alert went out and 126 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: 1708 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1605 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 385 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 19.0

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
Sep 9, 9:00 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Marshall, Nemaha, Republic and 1 more	90 min
Sep 9, 10:32 PM CDT	Mesoscale Discussion	SPC	Chase, Dickinson, Ellsworth, Geary, Harvey, Lyon and 10 more	88 min
Sep 10, 5:02 AM CDT	Mesoscale Discussion	SPC	Audrain, Chariton, Clark, Howard, Knox, Lewis and 7 more	118 min
Sep 10, 1:48 PM CDT	Mesoscale Discussion	SPC	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren and 1 more	117 min
Sep 10, 3:24 PM CDT	Severe Thunderstorm Watch	SPC	Crawford, Franklin, Iron, Jefferson, Madison, Reynolds and 6 more	6 hr
Sep 10, 4:36 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Dent, Douglas and 21 more	84 min
Sep 10, 6:22 PM CDT	Mesoscale Discussion	SPC	Iron, Jefferson, Madison, Perry, Sainte Genevieve, Saint Francois and 2 more	83 min

Nearby

Mesoscale Discussions in Missouri, 2014 Mesoscale Discussions in Kansas, 2014 Every mesoscale discussion in 2014

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.