Alert archive / Kansas / Mesoscale Discussions in 2013

Mesoscale Discussion 1464

July 22, 201311 counties in Kansas; Atchison County, Holt County, Missouri; 7 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2013, 3:34 PM CDT for 11 counties in Kansas; Atchison County, Holt County, Missouri; 7 counties in Nebraska. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jul 22, 2013, 3:34 PM CDT (20:34 UTC)
Expired: Jul 22, 2013, 5:00 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Atchison County, KS, Brown County, KS, Doniphan County, KS, Jackson County, KS, Jefferson County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Washington County, KS, Atchison County, MO, Holt County, MO, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Topeka radar (KTWX), 100 km from the middle of the area, began a volume at 20:37 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

Omaha, NE (KOAX), launched 12:00Z, 8.6 hours before the alert went out and 159 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: 1607 J/kg
Mixed-layer CIN: -190 J/kg
Mixed-layer LCL: 1223 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jul 22, 12:31 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Montgomery	89 min
Jul 22, 5:17 PM CDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Cowley, Edwards, Finney and 14 more	58 min
Jul 22, 6:19 PM CDT	Severe Thunderstorm Watch	SPC	Barber, Clark, Comanche, Edwards, Ford, Gray and 9 more	6 hr
Jul 22, 3:08 PM CDT	Severe Thunderstorm Watch	SPC	Burt, Cass, Cuming, Dakota, Dodge, Douglas and 6 more	9 hr
Jul 22, 5:45 PM CDT	Mesoscale Discussion	SPC	Burt, Dakota, Dodge, Douglas, Saunders, Thurston and 1 more	60 min

Nearby

Mesoscale Discussions in Kansas, 2013 Mesoscale Discussions in Nebraska, 2013 Mesoscale Discussions in Missouri, 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.