Alert archive / Kansas / Mesoscale Discussions in 2015

Mesoscale Discussion 1529

July 25, 201527 counties in Kansas; 4 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2015, 2:55 PM CDT for 27 counties in Kansas; 4 counties in Missouri. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jul 25, 2015, 2:55 PM CDT (19:55 UTC)
Expired: Jul 25, 2015, 4:30 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 31 counties

Barton County, KS, Chase County, KS, Dickinson County, KS, Douglas County, KS, Ellsworth County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Pawnee County, KS, Pottawatomie County, KS, Rice County, KS, Riley County, KS, Rush County, KS, Saline County, KS, Shawnee County, KS, Stafford County, KS, Wabaunsee County, KS, Wyandotte County, KS, Cass County, MO, Clay County, MO, Jackson County, MO, Platte County, MO

The radar

The Topeka radar (KTWX), 43 km from the middle of the area, began a volume at 19:59 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 451Jul 25, 3:20 PM CDT

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 7.9 hours before the alert went out and 81 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: 157 J/kg
Mixed-layer CIN: -456 J/kg
Mixed-layer LCL: 1208 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: -10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 25, 12:33 AM CDT	Mesoscale Discussion	SPC	Brown, Doniphan	2 hr
Jul 25, 3:20 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Atchison, Barton, Chase, Clay, Cloud and 33 more	8 hr
Jul 25, 4:59 PM CDT	Mesoscale Discussion	SPC	Finney, Ford, Gove, Grant, Gray, Greeley and 15 more	91 min
Jul 25, 5:22 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Rawlins	2 hr
Jul 25, 6:46 PM CDT	Mesoscale Discussion	SPC	Anderson, Atchison, Barton, Chase, Clay, Cloud and 36 more	89 min
Jul 24, 7:49 PM CDT	Severe Thunderstorm Watch	SPC	Christian, Dallas, Douglas, Greene, Laclede, Ozark and 5 more	3 hr
Jul 24, 7:51 PM CDT	Mesoscale Discussion	SPC	Christian, Dallas, Douglas, Greene, Laclede, Ozark and 5 more	24 min
Jul 24, 9:15 PM CDT	Mesoscale Discussion	SPC	Christian, Dallas, Douglas, Greene, Laclede, Ozark and 5 more	60 min

Nearby

Mesoscale Discussions in Kansas, 2015 Mesoscale Discussions in Missouri, 2015 Every mesoscale discussion in 2015

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.