Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

August 25, 2021Keya Paha County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 25, 2021, 12:42 PM CDT for Keya Paha 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: Aug 25, 2021, 12:42 PM CDT (17:42 UTC)
Expired: Aug 25, 2021, 1:30 PM CDT
In force: 48 min
Issued by: NWS North Platte, NE
Hail: 0.25 in
Wind: 50

County Keya Paha County, NE

The radar

The North Platte radar (KLNX), 110 km from the middle of the area, began a volume at 17:44 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, 5.7 hours before the alert went out and 194 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: 957 J/kg
Mixed-layer CIN: -382 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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.

NWS North Platte, NE wrote its last area forecast discussion before this special weather statement went out at Aug 25, 12:42 PM CDT, 0 minutes earlier.

Area forecast discussion, Aug 25, 12:42 PM CDT, 0 minutes before

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Hazardous weather outlook, Aug 25, 11:22 AM CDT, 1 hour 20 minutes before

Hazardous Weather Outlook
National Weather Service North Platte NE
1122 AM CDT Wed Aug 25 2021

NEZ004>010-022>029-035>038-056>059-069>071-094-261630-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
1122 AM CDT Wed Aug 25 2021 /1022 AM MDT Wed Aug 25 2021/

This Hazardous Weather Outlook is for portions of western and
north central Nebraska.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

Isolated thunderstorms are possible this afternoon and tonight
across western and north central Nebraska. A few storms could be
strong to severe, capable of producing large hail, strong winds,
and locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

Scattered thunderstorms are possible Thursday afternoon and
evening. There is a slight risk for severe storms, mainly across
the northern Sandhills.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected today or tonight.

&&

Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte

In the hours before

Special weather statement, Aug 25, 11:28 AM CDT, 1 hour 14 minutes before

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Special weather statement, Aug 25, 12:02 PM CDT, 40 minutes before

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Special weather statement, Aug 25, 12:42 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 24, 7:21 PM CDT	Special Weather Statement	LBF	Logan	39 min
Aug 24, 7:51 PM CDT	Special Weather Statement	LBF	Lincoln	39 min
Aug 24, 8:25 PM CDT	Special Weather Statement	LBF	Logan	35 min
Aug 24, 8:43 PM CDT	Special Weather Statement	LBF	Lincoln	32 min
Aug 24, 9:14 PM CDT	Special Weather Statement	LBF	Lincoln	46 min
Aug 25, 11:28 AM CDT	Special Weather Statement	LBF	Cherry	62 min
Aug 25, 1:21 PM CDT	Special Weather Statement	LBF	Brown, Keya Paha, Rock	39 min
Aug 25, 1:56 PM CDT	Special Weather Statement	LBF	Boyd, Holt, Rock	49 min
Aug 25, 2:41 PM CDT	Special Weather Statement	LBF	Boyd, Holt	49 min
Aug 25, 5:20 PM CDT	Special Weather Statement	LBF	Lincoln	40 min

Nearby

Special Weather Statements in Nebraska, 2021 Every special weather statement in 2021

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.