Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

August 5, 2021Sherman County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 5, 2021, 4:11 PM CDT for Sherman 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 5, 2021, 4:11 PM CDT (21:11 UTC)
Expired: Aug 5, 2021, 5:00 PM CDT
In force: 49 min
Issued by: NWS North Platte, NE
Hail: 0.88 in
Wind: 40

County Sherman County, NE

The radar

The Grand Island radar (KUEX), 113 km from the middle of the area, began a volume at 21:12 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, 9.2 hours before the alert went out and 105 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: 630 J/kg
Mixed-layer CIN: -219 J/kg
Mixed-layer LCL: 1661 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

949 
WWUS83 KLBF 052111
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
411 PM CDT Thu Aug 5 2021
 
NEZ038-052200-
Custer NE-
411 PM CDT Thu Aug 5 2021

...A strong thunderstorm will impact portions of southeastern Custer
County through 500 PM CDT...

At 411 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles north of Miller, or 27 miles northwest of Kearney, moving south
at 10 mph.

HAZARD...Winds in excess of 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Block Hill Basin and Intersection of Highway 183 and Cumro Road. 

This includes Highway 183 between mile markers 73 and 76.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4105 9947 4108 9948 4114 9925 4107 9920
      4105 9921
TIME...MOT...LOC 2111Z 339DEG 9KT 4105 9934 

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

$$

Sporer

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 3:11 PM CDT	Fire Weather Watch	LBF	Chase, Hayes, Lincoln, Perkins	12 hr
Aug 5, 4:02 PM CDT	Special Weather Statement	LBF	Keya Paha	28 min
Aug 5, 4:23 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha	52 min
Aug 5, 5:13 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Cherry, Keya Paha, Rock	47 min
Aug 5, 5:39 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Brown, Cherry	21 min
Aug 5, 5:49 PM CDT	Severe Thunderstorm Warning Destructive damage threat	LBF	Holt, Rock	41 min
Aug 5, 5:59 PM CDT	Severe Thunderstorm Warning Destructive damage threat	LBF	Blaine, Brown, Cherry, Thomas	46 min
Aug 5, 6:34 PM CDT	Special Weather Statement	LBF	Sheridan	41 min
Aug 5, 6:45 PM CDT	Special Weather Statement	LBF	Blaine	45 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.