Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 423

April 27, 201425 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2014, 3:19 PM CDT for 25 counties in Nebraska. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Apr 27, 2014, 3:19 PM CDT (20:19 UTC)
Expired: Apr 27, 2014, 4:45 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center

All 25 counties

Adams County, NE, Arthur County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Cherry County, NE, Clay County, NE, Custer County, NE, Fillmore County, NE, Garfield County, NE, Grant County, NE, Hall County, NE, Hamilton County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Merrick County, NE, Nuckolls County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Webster County, NE

The radar

The North Platte radar (KLNX), 85 km from the middle of the area, began a volume at 20:19 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, 8.3 hours before the alert went out and 65 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: 3019 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 106 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
Apr 27, 7:55 AM CDT	Mesoscale Discussion	SPC	Pawnee	95 min
Apr 27, 11:54 AM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Blaine, Boone, Brown, Buffalo and 36 more	96 min
Apr 27, 12:16 PM CDT	Tornado Watch	SPC	Adams, Blaine, Boyd, Brown, Buffalo, Cherry and 31 more	7 hr
Apr 27, 12:48 PM CDT	Mesoscale Discussion	SPC	Keith	2 hr
Apr 27, 6:28 PM CDT	Mesoscale Discussion	SPC	Blaine, Boyd, Brown, Cherry, Custer, Garfield and 13 more	62 min

Nearby

Mesoscale Discussions in Nebraska, 2014 Every mesoscale discussion in 2014

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.