Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 1209

June 4, 2008Phillips County, Washington County, Yuma County, Colorado; Cheyenne County, Decatur County, Rawlins County, Kansas; 7 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2008, 5:08 PM MDT for Phillips County, Washington County, Yuma County, Colorado; Cheyenne County, Decatur County, Rawlins County, Kansas; 7 counties in Nebraska. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jun 4, 2008, 5:08 PM MDT (23:08 UTC)
Expired: Jun 4, 2008, 6:15 PM MDT
In force: 67 min
Issued by: the Storm Prediction Center

Counties Phillips County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Rawlins County, KS, Chase County, NE, Dundy County, NE, Frontier County, NE, Hayes County, NE, Hitchcock County, NE, Perkins County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 86 km from the middle of the area, began a volume at 22:58 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 456Jun 4, 7:50 PM MDT

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.1 hours before the alert went out and 133 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: 266 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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
Jun 4, 11:54 AM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Boulder, Broomfield, Denver, Elbert and 7 more	96 min
Jun 4, 12:42 PM MDT	Tornado Watch	SPC	Adams, Arapahoe, Denver, Douglas, Elbert, Kit Carson and 8 more	7 hr
Jun 4, 2:26 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Denver, Elbert, Logan, Morgan and 5 more	64 min
Jun 3, 6:23 PM MDT	Tornado Watch	SPC	Allen, Anderson, Butler, Chase, Chautauqua, Coffey and 20 more	6 hr
Jun 3, 8:35 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 17 more	115 min
Jun 3, 9:43 PM MDT	Mesoscale Discussion	SPC	Brown, Clay, Cloud, Dickinson, Ellsworth, Geary and 20 more	3 hr
Jun 3, 9:58 PM MDT	Severe Thunderstorm Watch	SPC	Bourbon, Cherokee, Crawford	4 hr
Jun 4, 12:29 AM MDT	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford, Labette	91 min
Jun 4, 1:46 PM MDT	Tornado Watch	SPC	Jewell, Mitchell, Osborne, Phillips, Rooks, Smith	6 hr
Jun 4, 1:25 PM MDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Butler, Clay, Colfax and 30 more	65 min
Jun 4, 3:09 PM MDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Buffalo, Butler, Cass and 42 more	66 min
Jun 4, 4:40 PM MDT	Tornado Watch	SPC	Burt, Cuming, Dodge, Washington	6 hr
Jun 4, 5:47 PM MDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Burt, Butler, Cass and 36 more	58 min

Nearby

Mesoscale Discussions in Nebraska, 2008 Mesoscale Discussions in Colorado, 2008 Mesoscale Discussions in Kansas, 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.