Alert archive / Colorado / Mesoscale Discussions in 2011

Mesoscale Discussion 922

May 24, 20118 counties in Colorado; 4 counties in Kansas; Chase County, Dundy County, Hitchcock County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 24, 2011, 9:37 AM MDT for 8 counties in Colorado; 4 counties in Kansas; Chase County, Dundy County, Hitchcock County, Nebraska. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: May 24, 2011, 9:37 AM MDT (15:37 UTC)
Expired: May 24, 2011, 11:00 AM MDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Arapahoe County, CO, Cheyenne County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Phillips County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Chase County, NE, Dundy County, NE, Hitchcock County, NE

The radar

The Goodland radar (KGLD), 85 km from the middle of the area, began a volume at 15:37 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.

Tornado Watch 358May 24, 12:25 PM MDT

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 3.6 hours before the alert went out and 58 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: 291 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 996 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 24, 1:24 AM MDT	Mesoscale Discussion	SPC	Kit Carson	96 min
May 24, 1:42 AM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Kit Carson, Yuma	4 hr
May 24, 12:27 PM MDT	Tornado Watch	SPC	Baca, Cheyenne, Kiowa, Kit Carson, Prowers	6 hr
May 24, 5:21 AM MDT	Mesoscale Discussion	SPC	Barton, Chase, Clay, Cloud, Dickinson, Edwards and 25 more	54 min
May 24, 5:51 AM MDT	Severe Thunderstorm Watch	SPC	Barton, Brown, Butler, Chase, Clay, Cloud and 37 more	5 hr
May 24, 8:18 AM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Chase, Clay and 28 more	87 min
May 24, 11:59 AM MDT	Mesoscale Discussion	SPC	Barton, Edwards, Ellis, Ellsworth, Finney, Ford and 26 more	91 min
May 24, 1:35 PM MDT	Mesoscale Discussion	SPC	Barber, Barton, Butler, Chase, Chautauqua, Coffey and 27 more	85 min
May 24, 2:14 PM MDT	Tornado Watch PDS	SPC	Allen, Barton, Butler, Chase, Chautauqua, Cowley and 20 more	9 hr
May 24, 4:03 PM MDT	Mesoscale Discussion	SPC	Clay, Cloud, Dickinson, Geary, Jewell, Lincoln and 11 more	57 min
May 24, 4:19 PM MDT	Tornado Watch	SPC	Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 23 more	7 hr

Nearby

Mesoscale Discussions in Colorado, 2011 Mesoscale Discussions in Kansas, 2011 Mesoscale Discussions in Nebraska, 2011 Every mesoscale discussion in 2011

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.