Alert archive / Colorado / Mesoscale Discussions in 2003

Mesoscale Discussion 1787

July 11, 20038 counties in Colorado; 8 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2003, 8:52 PM MDT for 8 counties in Colorado; 8 counties in Kansas. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jul 11, 2003, 8:52 PM MDT (02:52 UTC)
Expired: Jul 11, 2003, 10:15 PM MDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Cheyenne County, CO, Crowley County, CO, Kiowa County, CO, Kit Carson County, CO, Lincoln County, CO, Morgan County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Logan County, KS, Scott County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS

The radar

The Goodland radar (KGLD), 81 km from the middle of the area, began a volume at 02:54 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

Denver, CO (KDNR), launched 00:00Z, 2.9 hours before the alert went out and 74 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: 672 J/kg
Mixed-layer CIN: -201 J/kg
Mixed-layer LCL: 2882 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 80 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 11, 6:35 PM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Crowley, Elbert, Kiowa, Kit Carson, Lincoln and 7 more	5 hr
Jul 12, 1:55 PM MDT	Mesoscale Discussion	SPC	Logan, Morgan, Phillips, Sedgwick, Washington, Weld	2 hr
Jul 12, 4:10 PM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Elbert, Kit Carson, Lincoln, Logan, Morgan and 4 more	6 hr
Jul 11, 6:04 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chase, Cherokee, Coffey and 20 more	86 min
Jul 11, 8:16 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Cherokee, Coffey, Crawford and 6 more	29 min
Jul 11, 8:40 PM MDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 9 more	5 hr
Jul 11, 10:51 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 8 more	84 min
Jul 12, 12:53 AM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 21 more	67 min
Jul 12, 2:10 AM MDT	Severe Thunderstorm Watch	SPC	Allen, Bourbon, Butler, Chase, Chautauqua, Cherokee and 14 more	5 hr
Jul 12, 5:33 AM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 26 more	87 min
Jul 12, 3:26 PM MDT	Mesoscale Discussion	SPC	Chautauqua, Cherokee, Labette, Montgomery	2 hr

Nearby

Mesoscale Discussions in Colorado, 2003 Mesoscale Discussions in Kansas, 2003 Every mesoscale discussion in 2003

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.