Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

July 17, 2021Custer County, Loup County, Nebraska

NWS North Platte, NE issued this special weather statement at Jul 17, 2021, 1:07 AM CDT for Custer County, Loup 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
Jul 17, 2021, 1:07 AM CDT (06:07 UTC)
Expired
Jul 17, 2021, 1:45 AM CDT
In force
38 min
Issued by
NWS North Platte, NE

Counties Custer County, NE, Loup County, NE

The radar

The North Platte radar (KLNX), 110 km from the middle of the area, began a volume at 06:10 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, 6.1 hours before the alert went out and 114 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 2021-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 989 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 2021-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
989 J/kg
Mixed-layer CIN
-136 J/kg
Mixed-layer LCL
1785 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

743 
WWUS83 KLBF 170607
SPSLBF

Special Weather Statement
National Weather Service North Platte NE
107 AM CDT Sat Jul 17 2021
 
NEZ026>028-038-170645-
Loup NE-Custer NE-Garfield NE-Blaine NE-
107 AM CDT Sat Jul 17 2021

...SIGNIFICANT WEATHER ADVISORY FOR LOUP...SOUTHWESTERN GARFIELD...
CUSTER AND SOUTHEASTERN BLAINE COUNTIES UNTIL 145 AM CDT...

At 107 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles southeast of Rose to 8 miles northwest
of Callaway. Movement was southeast at 30 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations impacted include...
Broken Bow, Burwell, Taylor, Callaway, Sargent, Ansley, Merna,
Oconto, Anselmo, Comstock, Berwyn, Victoria Springs State Recreation 
Area, Calamus Reservoir, Weissert, Westerville, Lillian, Milburn, 
Walworth, Virginia Smith Dam and Lodi.

This includes the following highways...
 Highway 183 between mile markers 84 and 144.
 Highway 2 between mile markers 257 and 298.
 Highway 92 between mile markers 259 and 302.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4174 9891 4174 9921 4140 9921 4106 9951
      4106 10007 4139 10015 4208 9944 4180 9886
TIME...MOT...LOC 0607Z 318DEG 27KT 4204 9939 4139 10000 

$$

CDC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 7:46 PM CDTSevere Thunderstorm WarningLBFCherry, Sheridan59 min
Jul 16, 8:13 PM CDTSevere Thunderstorm WarningLBFSheridan32 min
Jul 16, 8:42 PM CDTSevere Thunderstorm WarningLBFCherry, Sheridan63 min
Jul 16, 9:29 PM CDTSpecial Weather StatementLBFCherry46 min
Jul 16, 9:44 PM CDTSpecial Weather StatementLBFSheridan31 min
Jul 16, 10:13 PM CDTSpecial Weather StatementLBFCherry62 min
Jul 16, 10:15 PM CDTSpecial Weather StatementLBFArthur, Grant, Hooker60 min
Jul 16, 10:42 PM CDTSpecial Weather StatementLBFSheridan33 min
Jul 16, 11:11 PM CDTSpecial Weather StatementLBFBlaine, Brown, Logan, Thomas64 min
Jul 16, 11:14 PM CDTSpecial Weather StatementLBFArthur, Keith, McPherson61 min
Jul 16, 11:15 PM CDTSpecial Weather StatementLBFSheridan60 min
Jul 16, 11:26 PM CDTSpecial Weather StatementLBFGrant49 min
Jul 17, 12:10 AM CDTSpecial Weather StatementLBFArthur65 min
Jul 17, 12:12 AM CDTSpecial Weather StatementLBFBlaine63 min
Jul 17, 12:31 AM CDTSpecial Weather StatementLBFLincoln44 min
Jul 17, 1:12 AM CDTSpecial Weather StatementLBFLincoln63 min
Jul 17, 1:15 AM CDTSpecial Weather StatementLBFArthur45 min
Jul 17, 2:11 AM CDTSpecial Weather StatementLBFFrontier64 min
Jul 17, 2:13 AM CDTSpecial Weather StatementLBFGarfield, Wheeler62 min
Jul 17, 2:55 AM CDTAreal Flood AdvisoryLBFFrontier58 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.