Alert archive / Nebraska / Mesoscale Discussions in 2011

Mesoscale Discussion 2236

October 7, 201116 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Oct 7, 2011, 11:28 PM CDT for 16 counties in Nebraska. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Oct 7, 2011, 11:28 PM CDT (04:28 UTC)
Expired: Oct 8, 2011, 12:30 AM CDT
In force: 62 min
Issued by: the Storm Prediction Center

Counties Adams County, NE, Buffalo County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Merrick County, NE, Phelps County, NE, Sherman County, NE, Valley County, NE

The radar

The Grand Island radar (KUEX), 104 km from the middle of the area, began a volume at 04:28 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 864Oct 8, 1:50 AM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.5 hours before the alert went out and 99 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2632 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 148 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
Oct 7, 9:25 PM CDT	Mesoscale Discussion	SPC	Boone, Buffalo, Dawson, Gosper, Greeley, Hall and 8 more	95 min
Oct 8, 12:55 AM CDT	Mesoscale Discussion	SPC	Franklin, Furnas, Harlan, Webster	95 min
Oct 8, 1:47 AM CDT	Severe Thunderstorm Watch	SPC	Hitchcock, Red Willow	5 hr
Oct 8, 5:28 AM CDT	Mesoscale Discussion	SPC	Red Willow	62 min

Nearby

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.