Alert archive / Kansas / Mesoscale Discussions in 2008

Mesoscale Discussion 764

May 1, 20088 counties in Kansas; Alfalfa County, Blaine County, Major County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 1, 2008, 8:43 PM CDT for 8 counties in Kansas; Alfalfa County, Blaine County, Major County, Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 1, 2008, 8:43 PM CDT (01:43 UTC)
Expired: May 1, 2008, 10:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Harper County, KS, Harvey County, KS, Kingman County, KS, Marion County, KS, McPherson County, KS, Reno County, KS, Sedgwick County, KS, Sumner County, KS, Alfalfa County, OK, Blaine County, OK, Major County, OK

The radar

The Vance AFB radar (KVNX), 54 km from the middle of the area, began a volume at 01:43 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

Lamont, OK (KLMN), launched 00:00Z, 1.7 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: 340 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 3058 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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
May 1, 7:19 PM CDT	Mesoscale Discussion	SPC	Barton, Clay, Cloud, Dickinson, Ellsworth, Geary and 13 more	56 min
May 1, 7:24 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chautauqua, Coffey, Cowley and 17 more	66 min
May 1, 10:04 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Butler and 28 more	116 min
May 1, 11:29 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Butler and 28 more	91 min
May 2, 12:53 AM CDT	Tornado Watch	SPC	Allen, Anderson, Atchison, Bourbon, Chautauqua, Cherokee and 20 more	6 hr
May 2, 1:09 AM CDT	Tornado Watch	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 39 more	7 hr
May 2, 4:22 AM CDT	Mesoscale Discussion	SPC	LeFlore	53 min

Nearby

Mesoscale Discussions in Kansas, 2008 Mesoscale Discussions in Oklahoma, 2008 Every mesoscale discussion in 2008

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.