Alert archive / Nebraska / Special Weather Statements in 2018

Special Weather Statement, NWS North Platte, NE

August 6, 2018Frontier County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 6, 2018, 12:15 AM CDT for Frontier County, Nebraska. It was in force for 45 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 6, 2018, 12:15 AM CDT (05:15 UTC)
Expired: Aug 6, 2018, 1:00 AM CDT
In force: 45 min
Issued by: NWS North Platte, NE

County Frontier County, NE

The radar

The Goodland radar (KGLD), 157 km from the middle of the area, began a volume at 05:18 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, 5.3 hours before the alert went out and 67 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: 2214 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1009 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 14.3

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 5, 11:57 PM CDT, 18 minutes earlier.

Area forecast discussion, Aug 5, 11:57 PM CDT, 18 minutes before

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Hazardous weather outlook, Aug 5, 8:11 PM CDT, 4 hours 4 minutes before

Hazardous Weather Outlook
National Weather Service North Platte NE
811 PM CDT Sun Aug 5 2018

NEZ004>010-022>029-035>038-056>059-069>071-094-070115-
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-
811 PM CDT Sun Aug 5 2018 /711 PM MDT Sun Aug 5 2018/

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

.DAY ONE...TONIGHT.

Scattered thunderstorms are possible tonight across most of
western and north central Nebraska. Some storms may be strong to
severe with the main hazards being wind damage, large hail, and
heavy rainfall.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

A few thunderstorms are possible through Wednesday evening. The
risk of severe weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening for areas west of
highway 83.

&&

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

Roberg

In the hours before

Special weather statement, Aug 5, 10:24 PM CDT, 1 hour 51 minutes before

Special Weather Statement
National Weather Service North Platte NE
924 PM MDT SUN AUG 5 2018

NEZ058-060400-
Perkins NE-
924 PM MDT SUN AUG 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN PERKINS COUNTY UNTIL 1000
PM MDT...

At 924 PM MDT, Doppler radar was tracking a strong thunderstorm near
Venango, or 11 miles west of Grant, moving northeast at 15 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Grant, Venango, Brandon and Wild Horse Spring.

This includes Highway 61 between mile markers 63 and 78.

LAT...LON 4094 10206 4100 10205 4100 10159 4086 10159
      4071 10184 4070 10205
TIME...MOT...LOC 0324Z 230DEG 15KT 4083 10195

Snively

Special weather statement, Aug 5, 10:50 PM CDT, 1 hour 25 minutes before

Special Weather Statement
National Weather Service North Platte NE
1050 PM CDT SUN AUG 5 2018

NEZ058-059-060430-
Perkins NE-Lincoln NE-
1050 PM CDT SUN AUG 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN PERKINS AND SOUTHWESTERN
LINCOLN COUNTIES UNTIL 1130 PM CDT/1030 PM MDT/...

At 1049 PM CDT/949 PM MDT/, Doppler radar was tracking a strong
thunderstorm near Madrid, or 10 miles east of Grant, moving northeast
at 20 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Wallace, Madrid, Elsie and Grainton.

This includes Highway 61 between mile markers 54 and 64.

LAT...LON 4070 10174 4100 10159 4100 10110 4070 10111
TIME...MOT...LOC 0349Z 244DEG 19KT 4079 10153

Snively

Special weather statement, Aug 5, 11:06 PM CDT, 1 hour 9 minutes before

Special Weather Statement
National Weather Service North Platte NE
1006 PM MDT SUN AUG 5 2018

NEZ004-060445-
Sheridan NE-
1006 PM MDT SUN AUG 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SHERIDAN COUNTY
UNTIL 1045 PM MDT...

At 1005 PM MDT, Doppler radar was tracking a strong thunderstorm 12
miles east of Box Butte Dam, or 16 miles southwest of Hay Springs,
moving east at 35 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Diamond Lake and Smith Lake State Wildlife Management Area.

This includes Highway 250 between mile markers 12 and 33.

LAT...LON 4261 10277 4249 10239 4219 10239 4234 10275
      4244 10275 4244 10277
TIME...MOT...LOC 0405Z 290DEG 30KT 4247 10283

Snively

Special weather statement, Aug 5, 11:44 PM CDT, 31 minutes before

Special Weather Statement
National Weather Service North Platte NE
1044 PM MDT SUN AUG 5 2018

NEZ004-023-094-060530-
Sheridan NE-Grant NE-Western Cherry NE-
1044 PM MDT SUN AUG 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CHERRY...
NORTHWESTERN GRANT AND SOUTHEASTERN SHERIDAN COUNTIES UNTIL 1130 PM
MDT...

At 1044 PM MDT, Doppler radar was tracking a strong thunderstorm 21
miles north of Ellsworth, or 25 miles south of Rushville, moving
southeast at 35 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Ashby, Watson Lake, Diamond Lake, Big Hill, Wolf Hill, Finnegan Lake,
Smith Lake State Wildlife Management Area and Argo Hill.

This includes the following highways...
 Highway 250 between mile markers 13 and 34.
 Highway 2 between mile markers 135 and 136.

LAT...LON 4227 10257 4253 10248 4238 10193 4200 10193
TIME...MOT...LOC 0444Z 293DEG 32KT 4235 10242

Snively

Special weather statement, Aug 5, 11:48 PM CDT, 27 minutes before

Special Weather Statement
National Weather Service North Platte NE
1148 PM CDT SUN AUG 5 2018

NEZ070-071-060530-
Frontier NE-Hayes NE-
1148 PM CDT SUN AUG 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN FRONTIER AND CENTRAL
HAYES COUNTIES UNTIL 1230 AM CDT...

At 1148 PM CDT, Doppler radar was tracking a strong thunderstorm near
Hayes Center, moving east at 20 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Hayes Center, Maywood, Marengo and Hayes Center State Wildlife
Management Area.

This includes Highway 83 between mile markers 46 and 51.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4045 10122 4069 10118 4070 10058 4041 10078
TIME...MOT...LOC 0448Z 284DEG 18KT 4055 10110

Snively

Special weather statement, Aug 6, 12:15 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 5, 10:24 PM CDT	Special Weather Statement	LBF	Perkins	36 min
Aug 5, 10:50 PM CDT	Special Weather Statement	LBF	Perkins	40 min
Aug 5, 11:06 PM CDT	Special Weather Statement	LBF	Sheridan	39 min
Aug 5, 11:44 PM CDT	Special Weather Statement	LBF	Sheridan	46 min
Aug 5, 11:48 PM CDT	Special Weather Statement	LBF	Hayes	42 min
Aug 6, 6:10 PM CDT	Severe Thunderstorm Warning	LBF	Garden	50 min
Aug 6, 6:51 PM CDT	Severe Thunderstorm Warning	LBF	Garden	54 min

Nearby

Special Weather Statements in Nebraska, 2018 Every special weather statement in 2018

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.