Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

May 20, 2021Garden County, Nebraska

NWS North Platte, NE issued this special weather statement at May 20, 2021, 10:21 PM MDT for Garden 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: May 20, 2021, 10:21 PM MDT (04:21 UTC)
Expired: May 20, 2021, 11:00 PM MDT
In force: 39 min
Issued by: NWS North Platte, NE

County Garden County, NE

The radar

The North Platte radar (KLNX), 131 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, 4.4 hours before the alert went out and 171 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: 441 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 1640 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

265 
WWUS83 KLBF 210421
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
1021 PM MDT Thu May 20 2021
 
NEZ004-022-023-094-210500-
Sheridan NE-Grant NE-Western Cherry NE-Garden NE-
1021 PM MDT Thu May 20 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CHERRY...WESTERN
GRANT...NORTHEASTERN GARDEN AND SOUTHEASTERN SHERIDAN COUNTIES UNTIL
1100 PM MDT...

At 1021 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 23 miles southeast of Rushville to 9 miles
southeast of Crescent Lake National Wildlife Refuge. Movement was
northeast at 25 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Ellsworth, Crescent Lake National Wildlife Refuge, Watson Lake,
Rackett, Patterson Lake, Big Hill, Dogtown Flats, Billys Lake, Morgan
Lake, Finnegan Lake, Deer Lake, Britton Lake, Highway 27 crossing the
Niobrara River, Kincaid Lake, Kennedy Lake, Wild Horse Flats, Rock
Hill, Bingham, Wolf Hill and Dominick Lake.

This includes the following highways...
 Highway 250 between mile markers 1 and 23.
 Highway 2 between mile markers 111 and 135.

LAT...LON 4273 10187 4162 10202 4146 10218 4146 10242
      4238 10243 4268 10220
TIME...MOT...LOC 0421Z 208DEG 20KT 4246 10215 4165 10227 

$$

Snively

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 8:53 PM MDT	Special Weather Statement	LBF	Garden	37 min
May 21, 4:47 PM MDT	Special Weather Statement	LBF	Sheridan	43 min
May 21, 5:57 PM MDT	Special Weather Statement	LBF	Sheridan	33 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.