Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

July 5, 2021Sheridan County, Nebraska

NWS North Platte, NE issued this special weather statement at Jul 5, 2021, 7:21 PM MDT for Sheridan County, Nebraska. It was in force for 39 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: Jul 5, 2021, 7:21 PM MDT (01:21 UTC)
Expired: Jul 5, 2021, 8:00 PM MDT
In force: 39 min
Issued by: NWS North Platte, NE

County Sheridan County, NE

The radar

The Rapid City radar (KUDX), 164 km from the middle of the area, began a volume at 01:24 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, 1.4 hours before the alert went out and 230 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: 443 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 2307 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

207 
WWUS83 KLBF 060121
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
721 PM MDT Mon Jul 5 2021
 
NEZ004-060200-
Sheridan NE-
721 PM MDT Mon Jul 5 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN SHERIDAN COUNTY UNTIL 
800 PM MDT...

At 720 PM MDT, Doppler radar was tracking strong thunderstorms 
extending from near Pine Ridge to 12 miles south of Hay Springs. 
Movement was northeast at 35 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Gordon, Rushville, Hay Springs, Clinton, Intersection of Highway 87
and Craven Creek Road, Lone Butte, Intersection of Highway 87 and
Larabee Road, Highway 27 crossing the Niobrara River, Mount Maria,
Highway 250 crossing the Niobrara River, Walgren Lake State
Recreation Area, Hoover Lake, and Pine Ridge.

LAT...LON 4300 10209 4278 10208 4243 10224 4242 10275
      4244 10275 4244 10277 4254 10278 4299 10258
TIME...MOT...LOC 0120Z 244DEG 31KT 4301 10252 4251 10274 

$$

Snively

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 10:42 AM MDT	Special Weather Statement	LBF	Lincoln	33 min
Jul 6, 11:37 AM MDT	Special Weather Statement	LBF	Custer	38 min
Jul 6, 11:47 AM MDT	Special Weather Statement	LBF	Custer	43 min
Jul 6, 11:57 AM MDT	Areal Flood Advisory	LBF	Custer	3 hr
Jul 6, 12:42 PM MDT	Areal Flood Advisory	LBF	Custer, Garfield, Wheeler	3 hr
Jul 6, 1:01 PM MDT	Areal Flood Warning	LBF	Custer	3 hr
Jul 6, 5:23 PM MDT	Special Weather Statement	LBF	Frontier	37 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.