Alert archive / Nebraska / Special Weather Statements in 2017

Special Weather Statement, NWS North Platte, NE

August 16, 2017Custer County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 16, 2017, 12:41 AM CDT for Custer County, Nebraska. It was in force for 49 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 16, 2017, 12:41 AM CDT (05:41 UTC)
Expired: Aug 16, 2017, 1:30 AM CDT
In force: 49 min
Issued by: NWS North Platte, NE

County Custer County, NE

The radar

The North Platte radar (KLNX), 92 km from the middle of the area, began a volume at 05:44 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 00:00Z, 5.7 hours before the alert went out and 71 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: 843 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 2134 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 16, 12:05 AM CDT, 36 minutes earlier.

Area forecast discussion, Aug 16, 12:05 AM CDT, 36 minutes before

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Hazardous weather outlook, Aug 16, 12:09 AM CDT, 32 minutes before

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In the hours before

Special weather statement, Aug 15, 11:13 PM CDT, 1 hour 28 minutes before

Special Weather Statement
National Weather Service North Platte NE
1113 PM CDT TUE AUG 15 2017

NEZ005-006-008-009-160500-
Brown NE-Eastern Cherry NE-Rock NE-Keya Paha NE-
1113 PM CDT TUE AUG 15 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CHERRY...NORTHWESTERN
ROCK...BROWN AND KEYA PAHA COUNTIES UNTIL MIDNIGHT CDT...

At 1112 PM CDT, Doppler radar was tracking strong thunderstorms
along a line extending from Norden to Thedford. Movement was east at
30 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Ainsworth, Springview, Long Pine, Johnstown, Brownlee, Norden,
Elsmere, Wood Lake, Burton, Hofeld Lake, Raven, Bobcat State Wildlife
Management Area, Willow Lake State Wildlife Management Area, Thomas
Creek State Wildlife Management Area, Smith Falls State Park,
Koshopah, Pine Glen State Wildlife Refuge, Antelope Peak, Nets Peak
and Moon Lake.

This includes the following highways...
 Highway 183 between mile markers 194 and 225.
 Highway 20 between mile markers 203 and 255.
 Highway 83 between mile markers 158 and 199.
 Highway 12 between mile markers 9 and 70.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A severe thunderstorm watch remains in effect until midnight CDT for
north central Nebraska.

LAT...LON 4209 9984 4210 10074 4214 10075 4300 10042
      4299 9939
TIME...MOT...LOC 0412Z 268DEG 26KT 4298 10014 4211 10051

Snively

Special weather statement, Aug 15, 11:54 PM CDT, 47 minutes before

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Special weather statement, Aug 15, 11:56 PM CDT, 45 minutes before

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Special weather statement, Aug 16, 12:21 AM CDT, 20 minutes before

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Special weather statement, Aug 16, 12:40 AM CDT, 1 minute before

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Special weather statement, Aug 16, 12:41 AM 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 15, 8:03 PM CDT	Severe Thunderstorm Warning	LBF	Garden	42 min
Aug 15, 8:38 PM CDT	Special Weather Statement	LBF	Garden	52 min
Aug 15, 8:51 PM CDT	Flash Flood Warning	LBF	Deuel, Garden	6 hr
Aug 15, 9:46 PM CDT	Special Weather Statement	LBF	Cherry	44 min
Aug 15, 10:25 PM CDT	Special Weather Statement	LBF	Chase	50 min
Aug 15, 10:27 PM CDT	Special Weather Statement	LBF	Hooker, McPherson	48 min
Aug 15, 10:30 PM CDT	Special Weather Statement	LBF	Keya Paha	45 min
Aug 15, 10:43 PM CDT	Flash Flood Warning	LBF	Custer	8 hr
Aug 15, 11:08 PM CDT	Special Weather Statement	LBF	Hayes, Lincoln	52 min
Aug 15, 11:10 PM CDT	Special Weather Statement	LBF	Blaine, Logan, Thomas	50 min
Aug 15, 11:13 PM CDT	Special Weather Statement	LBF	Brown, Keya Paha	47 min
Aug 15, 11:47 PM CDT	Areal Flood Advisory	LBF	Lincoln	3 hr
Aug 15, 11:54 PM CDT	Special Weather Statement	LBF	Frontier, Lincoln	51 min
Aug 15, 11:56 PM CDT	Special Weather Statement	LBF	Blaine, Logan	49 min
Aug 16, 12:21 AM CDT	Special Weather Statement	LBF	Custer	39 min
Aug 16, 12:40 AM CDT	Special Weather Statement	LBF	Frontier	50 min
Aug 16, 1:25 AM CDT	Special Weather Statement	LBF	Frontier	35 min
Aug 16, 1:27 AM CDT	Special Weather Statement	LBF	Custer	33 min
Aug 16, 7:59 AM CDT	Areal Flood Advisory	LBF	Custer	4 hr
Aug 16, 5:43 PM CDT	Areal Flood Advisory	LBF	Custer	24 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.