Alert archive / Nebraska / Special Weather Statements in 2020

Special Weather Statement, NWS North Platte, NE

August 6, 2020Chase County, Nebraska

NWS North Platte, NE issued this special weather statement at Aug 6, 2020, 3:46 AM MDT for Chase County, Nebraska. It was in force for 44 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 6, 2020, 3:46 AM MDT (09:46 UTC)
Expired
Aug 6, 2020, 4:30 AM MDT
In force
44 min
Issued by
NWS North Platte, NE

County Chase County, NE

The radar

The Goodland radar (KGLD), 152 km from the middle of the area, began a volume at 09:49 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, 9.8 hours before the alert went out and 113 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 2020-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1771 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 2020-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
1771 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1639 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.8

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS North Platte, NE wrote its last area forecast discussion before this special weather statement went out at Aug 6, 3:14 AM MDT, 32 minutes earlier.

Area forecast discussion, Aug 6, 3:14 AM MDT, 32 minutes before
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Hazardous weather outlook, Aug 6, 3:43 AM MDT, 3 minutes before
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In the hours before

Special weather statement, Aug 6, 12:28 AM MDT, 3 hours 18 minutes before
Special Weather Statement
National Weather Service North Platte NE
128 AM CDT Thu Aug 6 2020

NEZ038-060715-
Custer NE-
128 AM CDT Thu Aug 6 2020

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL CUSTER COUNTY UNTIL
215 AM CDT...

At 128 AM CDT, Doppler radar was tracking a strong thunderstorm near
Arnold, or 21 miles east of Stapleton, moving east at 20 mph.

Dime size hail will be possible with this storm.

Locations impacted include...
Arnold, Callaway, Finchville, Pleasant Hill and Milldale.

This includes Highway 92 between mile markers 248 and 255, and
between mile markers 257 and 272.

LAT...LON 4127 10019 4145 10023 4154 9980 4130 9970
TIME...MOT...LOC 0628Z 261DEG 19KT 4138 10012

CDC
Special weather statement, Aug 6, 12:59 AM MDT, 2 hours 47 minutes before
Special Weather Statement
National Weather Service North Platte NE
1259 AM MDT Thu Aug 6 2020

NEZ094-060745-
Western Cherry NE-
1259 AM MDT Thu Aug 6 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CHERRY COUNTY UNTIL
145 AM MDT...

At 1259 AM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Merriman to 13 miles southeast of Gordon.
Movement was east at 25 mph.

Nickel size hail will be possible with these storms.

Locations impacted include...
Highway 61 Crossing The Niobrara River, Intersection of Highway 61
and Shadbolt Road and Highway 61 crossing the Snake River.

This includes Highway 61 between mile markers 198 and 224.

LAT...LON 4291 10122 4253 10171 4263 10205 4291 10169
TIME...MOT...LOC 0659Z 274DEG 20KT 4286 10170 4267 10200

CDC
Special weather statement, Aug 6, 2:29 AM MDT, 1 hour 17 minutes before
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Special weather statement, Aug 6, 2:46 AM MDT, 1 hour before
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Special weather statement, Aug 6, 3:34 AM MDT, 12 minutes before
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Special weather statement, Aug 6, 3:46 AM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 6:24 PM MDTSpecial Weather StatementLBFGarden51 min
Aug 5, 7:24 PM MDTSpecial Weather StatementLBFChase51 min
Aug 5, 8:23 PM MDTSpecial Weather StatementLBFGarden52 min
Aug 5, 8:41 PM MDTSevere Thunderstorm WarningLBFGarden16 min
Aug 5, 9:02 PM MDTSpecial Weather StatementLBFPerkins43 min
Aug 5, 9:54 PM MDTSpecial Weather StatementLBFLincoln51 min
Aug 5, 10:42 PM MDTSpecial Weather StatementLBFLincoln48 min
Aug 5, 11:25 PM MDTSpecial Weather StatementLBFSheridan50 min
Aug 5, 11:57 PM MDTSpecial Weather StatementLBFCuster48 min
Aug 6, 12:05 AM MDTSpecial Weather StatementLBFSheridan40 min
Aug 6, 12:28 AM MDTSpecial Weather StatementLBFCuster47 min
Aug 6, 12:59 AM MDTSpecial Weather StatementLBFCherry46 min
Aug 6, 1:43 AM MDTSevere Thunderstorm WarningLBFCherry47 min
Aug 6, 2:29 AM MDTSpecial Weather StatementLBFRock46 min
Aug 6, 4:26 AM MDTSpecial Weather StatementLBFChase49 min
Aug 6, 5:24 AM MDTSpecial Weather StatementLBFHayes36 min

Nearby

Special Weather Statements in Nebraska, 2020Every special weather statement in 2020

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.