Alert archive / Nebraska / Special Weather Statements in 2018

Special Weather Statement, NWS North Platte, NE

June 11, 2018Sheridan County, Nebraska

NWS North Platte, NE issued this special weather statement at Jun 11, 2018, 12:07 AM MDT for Sheridan County, Nebraska. It was in force for 38 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
Jun 11, 2018, 12:07 AM MDT (06:07 UTC)
Expired
Jun 11, 2018, 12:45 AM MDT
In force
38 min
Issued by
NWS North Platte, NE

County Sheridan County, NE

The radar

The North Platte radar (KLNX), 129 km from the middle of the area, began a volume at 06:11 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

Rapid City, SD (KRAP), launched 00:00Z, 6.1 hours before the alert went out and 173 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, Rapid City, SD at 00:00Z on 2018-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3540 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, Rapid City, SD at 00:00Z on 2018-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 square meters per square second.19395878Sfc1 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
3540 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
1757 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
0.6
Supercell composite
7.6

Open this sounding in Storm Lab

The text

As transmitted.

622 
WWUS83 KLBF 110607
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
1207 AM MDT MON JUN 11 2018
 
NEZ004-094-110645-
Sheridan NE-Western Cherry NE-
1207 AM MDT MON JUN 11 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CHERRY AND
NORTHEASTERN SHERIDAN COUNTIES UNTIL 1245 AM MDT...

At 1206 AM MDT, Doppler radar was tracking showers and thunderstorms 
over eastern Sheridan and western Cherry counties, moving northeast 
at 45 mph.

Dime size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Gordon, Merriman, Medicine Lake, Eli, Big Hill, Morgan Lake, Billys 
Lake, Irwin, Bayonne, Shell Lake State Wildlife Management Area, 
Rock Hill, Hoover Lake, Round Lake and Indian Hill.

This includes the following highways...
 Highway 20 between mile markers 105 and 155.
 Highway 61 between mile markers 187 and 231.

LAT...LON 4300 10130 4239 10155 4238 10228 4300 10220
TIME...MOT...LOC 0606Z 221DEG 37KT 4268 10186 

$$

Snively

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 7:12 PM MDTSpecial Weather StatementLBFDawes18 min
Jun 10, 7:31 PM MDTSpecial Weather StatementLBFSheridan44 min
Jun 10, 7:42 PM MDTSevere Thunderstorm WarningLBFSheridan48 min
Jun 10, 8:30 PM MDTSpecial Weather StatementLBFSheridan45 min
Jun 10, 11:02 PM MDTSpecial Weather StatementLBFSheridan43 min
Jun 11, 12:48 AM MDTSpecial Weather StatementLBFCherry42 min
Jun 11, 1:48 AM MDTSpecial Weather StatementLBFKeya Paha42 min

Nearby

Special Weather Statements in Nebraska, 2018Every special weather statement in 2018

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.