Alert archive / Nebraska / Mesoscale Discussions in 2007

Mesoscale Discussion 2075

October 14, 200721 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Oct 14, 2007, 11:29 AM CDT for 21 counties in Nebraska. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Oct 14, 2007, 11:29 AM CDT (16:29 UTC)
Expired: Oct 14, 2007, 1:00 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 21 counties

Adams County, NE, Boone County, NE, Buffalo County, NE, Dawson County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Kearney County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE

The radar

The Grand Island radar (KUEX), 96 km from the middle of the area, began a volume at 16:29 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 4.5 hours before the alert went out and 120 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: 488 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 122 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 13, 8:27 PM CDT	Mesoscale Discussion	SPC	Nuckolls, Webster	93 min
Oct 13, 9:17 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Clay, Fillmore, Franklin, Furnas, Gosper and 6 more	8 hr
Oct 13, 11:01 PM CDT	Mesoscale Discussion	SPC	Adams, Clay, Fillmore, Franklin, Furnas, Harlan and 2 more	89 min
Oct 14, 1:53 AM CDT	Mesoscale Discussion	SPC	Adams, Butler, Clay, Colfax, Cuming, Fillmore and 13 more	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2007 Every mesoscale discussion in 2007

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.