Alert archive / Oklahoma / Mesoscale Discussions in 2005

Mesoscale Discussion 490

April 5, 2005Clark County, Comanche County, Kansas; 7 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2005, 2:25 PM CDT for Clark County, Comanche County, Kansas; 7 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 5, 2005, 2:25 PM CDT (19:25 UTC)
Expired: Apr 5, 2005, 4:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Clark County, KS, Comanche County, KS, Custer County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Washita County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 136 km from the middle of the area, began a volume at 19:28 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

Dodge City, (KDDC), launched 12:00Z, 7.4 hours before the alert went out and 174 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: 70 J/kg
Mixed-layer CIN: -449 J/kg
Mixed-layer LCL: 2555 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: 14 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 5, 11:02 AM CDT	Mesoscale Discussion	SPC	Barton, Clay, Cloud, Decatur, Dickinson, Ellis and 33 more	118 min
Apr 5, 1:58 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Cowley, Elk, Montgomery	92 min
Apr 5, 2:05 PM CDT	Severe Thunderstorm Watch	SPC	Barton, Butler, Cowley, Decatur, Edwards, Ellis and 29 more	7 hr
Apr 5, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 6 more	7 hr
Apr 5, 3:55 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Barton, Bourbon, Butler, Chase and 62 more	95 min
Apr 5, 4:45 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Chase, Clay, Cloud, Coffey, Dickinson and 16 more	7 hr
Apr 5, 6:50 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Brown, Chase and 49 more	55 min
Apr 5, 2:30 PM CDT	Tornado Watch	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Hughes and 9 more	7 hr
Apr 5, 5:14 PM CDT	Mesoscale Discussion	SPC	Adair, Atoka, Bryan, Cherokee, Choctaw, Delaware and 13 more	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2005 Mesoscale Discussions in Kansas, 2005 Every mesoscale discussion in 2005

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.