Alert archive / Kansas / Mesoscale Discussions in 2007

Mesoscale Discussion 583

April 25, 20078 counties in Kansas; 5 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2007, 9:33 AM CDT for 8 counties in Kansas; 5 counties in Oklahoma. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Apr 25, 2007, 9:33 AM CDT (14:33 UTC)
Expired: Apr 25, 2007, 11:00 AM CDT
In force: 87 min
Issued by: the Storm Prediction Center

Counties Allen County, KS, Chautauqua County, KS, Elk County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Craig County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 115 km from the middle of the area, began a volume at 14:36 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 187Apr 25, 1:15 PM CDT

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 2.6 hours before the alert went out and 132 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: 82 J/kg
Mixed-layer CIN: -406 J/kg
Mixed-layer LCL: 1170 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 87 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
Apr 24, 7:53 PM CDT	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford	97 min
Apr 25, 5:55 AM CDT	Mesoscale Discussion	SPC	Barber, Barton, Butler, Chase, Chautauqua, Cowley and 20 more	2 hr
Apr 25, 12:30 PM CDT	Mesoscale Discussion	SPC	Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 6 more	60 min
Apr 25, 1:11 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more	8 hr
Apr 24, 7:33 PM CDT	Mesoscale Discussion	SPC	McCurtain	117 min
Apr 24, 10:35 PM CDT	Tornado Watch	SPC	McCurtain	5 hr

Nearby

Mesoscale Discussions in Kansas, 2007 Mesoscale Discussions in Oklahoma, 2007 Every mesoscale discussion in 2007

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.