Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

August 9, 2021Hayes County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 9, 2021, 6:55 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 9, 2021, 6:55 PM CDT (23:55 UTC)
Expired
Aug 9, 2021, 7:45 PM CDT
In force
50 min
Issued by
NWS North Platte, NE
Hail
0.75 in
Wind
50

County Hayes County, NE

The radar

The Goodland radar (KGLD), 122 km from the middle of the area, began a volume at 23:54 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, 11.9 hours before the alert went out and 95 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 12:00Z on 2021-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 28 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 12:00Z on 2021-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -78 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
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.

047 
WWUS83 KLBF 092355
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
655 PM CDT Mon Aug 9 2021
 
NEZ070-100045-
Hayes NE-
655 PM CDT Mon Aug 9 2021

...A strong thunderstorm will impact portions of south central Hayes
County through 745 PM CDT...

At 655 PM CDT, Doppler radar was tracking a strong thunderstorm near
Palisade, or 14 miles southwest of Hayes Center, moving east at 5
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...
Hamlet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4037 10128 4045 10093 4035 10095 4035 10129
TIME...MOT...LOC 2355Z 273DEG 6KT 4035 10121 

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.

IssuedProductOfficeCountiesLasted
Aug 9, 5:09 PM CDTSpecial Weather StatementLBFFrontier36 min
Aug 9, 5:45 PM CDTSpecial Weather StatementLBFLincoln45 min
Aug 9, 6:08 PM CDTSpecial Weather StatementLBFHayes52 min
Aug 9, 6:28 PM CDTSpecial Weather StatementLBFCuster47 min
Aug 9, 6:45 PM CDTSevere Thunderstorm WarningLBFCuster, Loup45 min
Aug 9, 6:59 PM CDTSpecial Weather StatementLBFCuster46 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.