Alert archive / Nebraska / Special Weather Statements in 2017

Special Weather Statement, NWS North Platte, NE

March 23, 2017Logan County, Nebraska

NWS North Platte, NE issued this special weather statement at Mar 23, 2017, 8:27 PM CDT for Logan County, Nebraska. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 23, 2017, 8:27 PM CDT (01:27 UTC)
Expired: Mar 23, 2017, 9:15 PM CDT
In force: 48 min
Issued by: NWS North Platte, NE

County Logan County, NE

The radar

The North Platte radar (KLNX), 95 km from the middle of the area, began a volume at 01:26 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 00:00Z, 1.5 hours before the alert went out and 24 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: 1331 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 1799 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 230 m²/s²
0-3 km storm-relative helicity: 260 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 23, 7:03 PM CDT	Special Weather Statement	LBF	Custer	42 min
Mar 23, 7:19 PM CDT	Severe Thunderstorm Warning	LBF	Custer	26 min
Mar 23, 7:46 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Loup	29 min
Mar 23, 8:17 PM CDT	Severe Thunderstorm Warning	LBF	Custer	43 min
Mar 23, 9:08 PM CDT	Special Weather Statement	LBF	Custer	52 min
Mar 23, 9:49 PM CDT	Areal Flood Advisory	LBF	Custer	6 hr

Nearby

Special Weather Statements in Nebraska, 2017 Every special weather statement in 2017

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.