Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

August 6, 2021Hayes County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 6, 2021, 9:40 PM CDT for Hayes County, Nebraska. It was in force for 50 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, 2021, 9:40 PM CDT (02:40 UTC)
Expired: Aug 6, 2021, 10:30 PM CDT
In force: 50 min
Issued by: NWS North Platte, NE
Hail: 0.25 in
Wind: 50

County Hayes County, NE

The radar

The Goodland radar (KGLD), 144 km from the middle of the area, began a volume at 02:41 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, 2.7 hours before the alert went out and 74 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: 870 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 3229 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

523 
WWUS83 KLBF 070240
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
940 PM CDT Fri Aug 6 2021
 
NEZ059-070-071-070330-
Frontier NE-Hayes NE-Lincoln NE-
940 PM CDT Fri Aug 6 2021

...A strong thunderstorm will impact portions of northwestern
Frontier, south central Lincoln and Hayes Counties through 1030 PM
CDT...

At 939 PM CDT, Doppler radar was tracking a strong thunderstorm 11
miles northwest of Hayes Center, moving east at 35 mph.

HAZARD...Wind gusts up to 50 mph and pea 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...
Hayes Center, Marengo, Hayes Center State Wildlife Management Area
and Somerset.

This includes Highway 83 between mile markers 38 and 39.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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 4043 10133 4066 10132 4085 10084 4051 10063
TIME...MOT...LOC 0239Z 252DEG 32KT 4058 10121 

MAX HAIL SIZE...0.25 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 6, 7:03 PM CDT	Severe Thunderstorm Warning	LBF	Sheridan	42 min
Aug 6, 7:39 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	51 min
Aug 6, 8:33 PM CDT	Special Weather Statement	LBF	Cherry	42 min
Aug 6, 11:19 PM CDT	Special Weather Statement	LBF	Dawson	41 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.