Alert archive / Nebraska / Mesoscale Discussions in 2009

Mesoscale Discussion 981

June 7, 20099 counties in Kansas; 16 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2009, 8:13 PM CDT for 9 counties in Kansas; 16 counties in Nebraska. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Jun 7, 2009, 8:13 PM CDT (01:13 UTC)
Expired: Jun 7, 2009, 9:15 PM CDT
In force: 62 min
Issued by: the Storm Prediction Center

All 25 counties

Graham County, KS, Jewell County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rooks County, KS, Russell County, KS, Smith County, KS, Adams County, NE, Buffalo County, NE, Clay County, NE, Franklin County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Merrick County, NE, Nuckolls County, NE, Phelps County, NE, Polk County, NE, Sherman County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 67 km from the middle of the area, began a volume at 01:14 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.

Severe Thunderstorm Watch 346Jun 7, 8:25 PM CDT

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 1.2 hours before the alert went out and 247 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: 1842 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1968 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 211 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
Jun 7, 7:08 PM CDT	Mesoscale Discussion	SPC	Anderson, Barber, Butler, Chase, Coffey, Greenwood and 7 more	67 min
Jun 7, 10:22 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Douglas, Geary, Jackson and 10 more	53 min
Jun 7, 10:53 PM CDT	Tornado Watch	SPC	Brown, Doniphan, Marshall, Nemaha, Washington	5 hr
Jun 7, 11:09 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Atchison, Coffey, Douglas, Franklin, Geary and 14 more	6 hr
Jun 7, 11:31 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Bourbon, Butler, Chase, Chautauqua, Cherokee and 14 more	5 hr
Jun 8, 12:34 AM CDT	Severe Thunderstorm Watch	SPC	Jewell, Mitchell, Osborne, Phillips, Rooks, Smith	1 min
Jun 8, 2:30 AM CDT	Mesoscale Discussion	SPC	Doniphan	60 min
Jun 8, 3:25 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Crawford and 8 more	65 min

Nearby

Mesoscale Discussions in Nebraska, 2009 Mesoscale Discussions in Kansas, 2009 Every mesoscale discussion in 2009

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.