Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

August 28, 2021Frontier County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 28, 2021, 10:21 PM CDT for Frontier County, Nebraska. It was in force for 39 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 28, 2021, 10:21 PM CDT (03:21 UTC)
Expired: Aug 28, 2021, 11:00 PM CDT
In force: 39 min
Issued by: NWS North Platte, NE
Hail: 0.50 in
Wind: 30

County Frontier County, NE

The radar

The Grand Island radar (KUEX), 147 km from the middle of the area, began a volume at 03:24 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, 3.4 hours before the alert went out and 84 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: 2510 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 2148 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.7

Open this sounding in Storm Lab

The text

As transmitted.

456 
WWUS83 KLBF 290321
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
1021 PM CDT Sat Aug 28 2021
 
NEZ071-290400-
Frontier NE-
1021 PM CDT Sat Aug 28 2021

...A strong thunderstorm will impact portions of southeastern
Frontier County through 1100 PM CDT...

At 1021 PM CDT, Doppler radar was tracking a strong thunderstorm over
Medicine Creek Reservoir State Recreation Area, or 22 miles southeast
of Curtis, moving east at 30 mph.

HAZARD...Winds in excess of 30 mph and half inch 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...
Medicine Creek Reservoir State Recreation Area, Orafino and Freedom. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
southwestern Nebraska.

&&

LAT...LON 4049 10032 4054 9998 4044 9998 4043 10009
      4035 10010 4035 10044
TIME...MOT...LOC 0321Z 262DEG 28KT 4041 10021 

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH

$$

Roberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 7:01 PM CDT	Special Weather Statement	LBF	Custer	29 min
Aug 28, 7:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Garfield, Holt, Loup, Wheeler	66 min
Aug 28, 7:13 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Loup	62 min
Aug 28, 7:15 PM CDT	Special Weather Statement	LBF	Frontier	30 min
Aug 28, 7:31 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	44 min
Aug 28, 7:42 PM CDT	Severe Thunderstorm Warning	LBF	Custer	33 min
Aug 28, 7:46 PM CDT	Special Weather Statement	LBF	Garfield	44 min
Aug 28, 8:03 PM CDT	Areal Flood Advisory	LBF	Blaine, Loup	3 hr
Aug 28, 8:07 PM CDT	Special Weather Statement	LBF	Holt	38 min
Aug 28, 8:18 PM CDT	Special Weather Statement	LBF	Loup	42 min
Aug 28, 8:19 PM CDT	Special Weather Statement	LBF	Wheeler	41 min
Aug 28, 8:21 PM CDT	Special Weather Statement	LBF	Frontier	39 min
Aug 28, 8:55 PM CDT	Special Weather Statement	LBF	Frontier	50 min
Aug 28, 8:57 PM CDT	Special Weather Statement	LBF	Custer	48 min
Aug 28, 11:33 PM CDT	Areal Flood Advisory	LBF	Garfield, Wheeler	6 hr
Aug 29, 12:03 AM CDT	Special Weather Statement	LBF	Frontier	42 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.