Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

August 9, 2021Custer County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 9, 2021, 6:28 PM CDT for Custer County, Nebraska. It was in force for 47 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 9, 2021, 6:28 PM CDT (23:28 UTC)
Expired: Aug 9, 2021, 7:15 PM CDT
In force: 47 min
Issued by: NWS North Platte, NE
Hail: 0.75 in
Wind: 50

County Custer County, NE

The radar

The North Platte radar (KLNX), 90 km from the middle of the area, began a volume at 23:30 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, 11.5 hours before the alert went out and 82 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: 28 J/kg
Mixed-layer CIN: -619 J/kg
Mixed-layer LCL: 2573 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -78 m²/s²
0-3 km storm-relative helicity: -37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

643 
WWUS83 KLBF 092328
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
628 PM CDT Mon Aug 9 2021
 
NEZ038-100015-
Custer NE-
628 PM CDT Mon Aug 9 2021

...A strong thunderstorm will impact portions of central Custer
County through 715 PM CDT...

At 628 PM CDT, Doppler radar was tracking a strong thunderstorm near
Merna, or 9 miles west of Broken Bow, moving northeast at 10 mph.

HAZARD...Wind gusts up to 50 mph and penny 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...
Broken Bow, Merna, Victoria Springs State Recreation Area and
Lillian.

This includes the following highways...
 Highway 2 between mile markers 262 and 278.
 Highway 92 between mile markers 267 and 273.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4134 9973 4145 9992 4167 9977 4150 9949
TIME...MOT...LOC 2328Z 219DEG 10KT 4143 9982 

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

$$

CDC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 5:09 PM CDT	Special Weather Statement	LBF	Frontier	36 min
Aug 9, 5:45 PM CDT	Special Weather Statement	LBF	Lincoln	45 min
Aug 9, 6:08 PM CDT	Special Weather Statement	LBF	Hayes	52 min
Aug 9, 6:45 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Loup	45 min
Aug 9, 6:55 PM CDT	Special Weather Statement	LBF	Hayes	50 min
Aug 9, 6:59 PM CDT	Special Weather Statement	LBF	Custer	46 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.