Alert archive / Nebraska / Special Weather Statements in 2017

Special Weather Statement, NWS North Platte, NE

August 17, 2017Boyd County, Holt County, Rock County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 17, 2017, 10:55 PM CDT for Boyd County, Holt County, Rock County, Nebraska. It was in force for 50 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: Aug 17, 2017, 10:55 PM CDT (03:55 UTC)
Expired: Aug 17, 2017, 11:45 PM CDT
In force: 50 min
Issued by: NWS North Platte, NE

Counties Boyd County, NE, Holt County, NE, Rock County, NE

The radar

The North Platte radar (KLNX), 158 km from the middle of the area, began a volume at 03:55 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, 3.9 hours before the alert went out and 216 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: 1099 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 2254 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

Hazardous weather outlook, Aug 17, 9:32 PM CDT, 1 hour 23 minutes before

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In the hours before

Special weather statement, Aug 17, 7:02 PM CDT, 3 hours 53 minutes before

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Special weather statement, Aug 17, 8:42 PM CDT, 2 hours 13 minutes before

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Special weather statement, Aug 17, 9:31 PM CDT, 1 hour 24 minutes before

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Special weather statement, Aug 17, 10:17 PM CDT, 38 minutes before

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Special weather statement, Aug 17, 10:55 PM CDT, 0 minutes before

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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
Aug 17, 7:02 PM CDT	Special Weather Statement	LBF	Chase	43 min
Aug 17, 8:42 PM CDT	Special Weather Statement	LBF	Cherry	63 min
Aug 17, 9:31 PM CDT	Special Weather Statement	LBF	Brown, Keya Paha	59 min
Aug 17, 10:17 PM CDT	Special Weather Statement	LBF	Blaine, Boyd, Brown, Rock	43 min
Aug 17, 10:59 PM CDT	Special Weather Statement	LBF	Blaine, Loup	46 min
Aug 17, 11:42 PM CDT	Special Weather Statement	LBF	Garfield, Wheeler	48 min

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.