Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

August 6, 2021Dawson County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 6, 2021, 11:19 PM CDT for Dawson County, Nebraska. It was in force for 41 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, 11:19 PM CDT (04:19 UTC)
Expired
Aug 7, 2021, 12:00 AM CDT
In force
41 min
Issued by
NWS North Platte, NE
Hail
0.25 in
Wind
50

County Dawson County, NE

The radar

The North Platte radar (KLNX), 114 km from the middle of the area, began a volume at 04:21 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, 4.3 hours before the alert went out and 68 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2021-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 870 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2021-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

017 
WWUS83 KLBF 070419
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
1119 PM CDT Fri Aug 6 2021
 
NEZ038-070500-
Custer NE-
1119 PM CDT Fri Aug 6 2021

...A strong thunderstorm will impact portions of south central Custer
County through MIDNIGHT CDT...

At 1118 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles southwest of Oconto, or 22 miles northwest of Lexington, moving
east at 25 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...
Oconto, Burr Oak and Cumro. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4116 10002 4118 9943 4104 9943 4105 10002
TIME...MOT...LOC 0418Z 268DEG 22KT 4107 9993 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

$$

Snively

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 7:03 PM CDTSevere Thunderstorm WarningLBFSheridan42 min
Aug 6, 7:39 PM CDTSevere Thunderstorm WarningLBFCherry51 min
Aug 6, 8:33 PM CDTSpecial Weather StatementLBFCherry42 min
Aug 6, 9:40 PM CDTSpecial Weather StatementLBFHayes50 min

Nearby

Special Weather Statements in Nebraska, 2021Every 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.