Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

August 6, 2021Sheridan County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 6, 2021, 5:55 PM MDT for Sheridan County, Nebraska. It was in force for 50 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 6, 2021, 5:55 PM MDT (23:55 UTC)
Expired: Aug 6, 2021, 6:45 PM MDT
In force: 50 min
Issued by: NWS North Platte, NE
Hail: 0.00 in
Wind: 50

County Sheridan County, NE

The radar

The Rapid City radar (KUDX), 148 km from the middle of the area, began a volume at 23:54 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.

What was reported inside it

Time	Report	Where	Remark
Aug 6, 6:27 PM MDT	TSTM WND GST 60	Sse Gordon, NE
Aug 6, 6:35 PM MDT	TSTM WND GST 60	6 N Gordon, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 11.9 hours before the alert went out and 142 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: 117 J/kg
Mixed-layer CIN: -465 J/kg
Mixed-layer LCL: 1438 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

851 
WWUS83 KLBF 062355
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
555 PM MDT Fri Aug 6 2021
 
NEZ004-070045-
Sheridan NE-
555 PM MDT Fri Aug 6 2021

...A strong thunderstorm will impact portions of northern Sheridan
County through 645 PM MDT...

At 554 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Hay Springs, moving northeast at 50 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Gordon, Rushville, Hay Springs, White Clay, Clinton, Pine Ridge,
Hoover Lake, Intersection of Highway 87 and Craven Creek Road,
Metcalf State Wildlife Management Area, Intersection of Beaver Creek
Road and White Clay Creek Road, Intersection of Highway 87 and
Larabee Road and Mount Maria.

This includes the following highways...
 Highway 20 between mile markers 74 and 111.
 Highway 250 between mile markers 47 and 48.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4300 10209 4278 10209 4270 10229 4266 10277
      4268 10278 4277 10278 4278 10277 4279 10279
      4300 10279
TIME...MOT...LOC 2354Z 240DEG 49KT 4281 10272 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 6:25 PM MDT	Special Weather Statement	LBF	Sheridan	50 min
Aug 6, 1:52 AM MDT	Red Flag Warning	LBF	Chase, Hayes, Lincoln, Perkins	16 hr
Aug 6, 5:58 PM MDT	Special Weather Statement	LBF	Lincoln	47 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.