Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 1783

October 1, 2014Wyandotte County, Kansas; 8 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Oct 1, 2014, 5:01 PM CDT for Wyandotte County, Kansas; 8 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Oct 1, 2014, 5:01 PM CDT (22:01 UTC)
Expired: Oct 1, 2014, 7:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Wyandotte County, KS, Carroll County, MO, Cass County, MO, Clay County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Ray County, MO, Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 49 km from the middle of the area, began a volume at 22:01 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 512Oct 1, 6:40 PM CDT

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 10.0 hours before the alert went out and 161 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: 665 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 600 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 372 m²/s²
0-3 km storm-relative helicity: 374 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 14.2

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
Oct 1, 1:44 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 11 more	3 hr
Oct 1, 2:40 PM CDT	Tornado Watch	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 11 more	7 hr
Oct 1, 5:54 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 15 more	2 hr
Oct 1, 6:20 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 14 more	85 min
Oct 1, 6:38 PM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Clay, Cloud, Dickinson, Doniphan and 19 more	7 hr

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.