Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 160, NWS Hastings, NE

August 11, 2020Valley County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Aug 11, 2020, 11:00 PM CDT for Valley County, Nebraska. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 11, 2020, 11:00 PM CDT (04:00 UTC)
Expired: Aug 11, 2020, 11:45 PM CDT
In force: 45 min
Issued by: NWS Hastings, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Valley County, NE

The radar

The North Platte radar (KLNX), 139 km from the middle of the area, began a volume at 04:04 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

Aberdeen, SD (KABR), launched 00:00Z, 4.0 hours before the alert went out and 374 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: 731 J/kg
Mixed-layer CIN: -222 J/kg
Mixed-layer LCL: 1646 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Hastings, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 7:53 PM CDT, 3 hours 7 minutes earlier.

Area forecast discussion, Aug 11, 7:53 PM CDT, 3 hours 7 minutes before

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Hazardous weather outlook, Aug 11, 10:06 PM CDT, 54 minutes before

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In the hours before

Special weather statement, Aug 11, 8:36 PM CDT, 2 hours 24 minutes before

Special Weather Statement
National Weather Service Hastings NE
836 PM CDT Tue Aug 11 2020

NEZ072-082-120215-
Gosper NE-Furnas NE-
836 PM CDT Tue Aug 11 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN GOSPER AND NORTHERN
FURNAS COUNTIES UNTIL 915 PM CDT...

At 836 PM CDT, Doppler radar was tracking a strong thunderstorm near
Medicine Creek Reservoir State Recreation Area, or 18 miles northeast
of McCook, moving east at 45 mph.

Pea size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Cambridge, Arapahoe, Oxford, Bertrand, Holbrook and Edison.

LAT...LON 4035 10020 4035 10010 4044 10009 4044 9998
      4054 9998 4054 9964 4019 9963 4019 10020
TIME...MOT...LOC 0136Z 269DEG 38KT 4035 10033

Rossi

Local storm report, Aug 11, 9:04 PM CDT, 1 hour 56 minutes before

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Local storm report, Aug 11, 9:43 PM CDT, 1 hour 17 minutes before

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Local storm report, Aug 11, 10:01 PM CDT, 59 minutes before

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Local storm report, Aug 11, 10:09 PM CDT, 51 minutes before

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Special weather statement, Aug 11, 10:34 PM CDT, 26 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 8:36 PM CDT	Special Weather Statement	GID	Furnas, Gosper	39 min
Aug 11, 8:53 PM CDT	Severe Thunderstorm Warning	GID	Furnas, Gosper	52 min
Aug 11, 10:34 PM CDT	Special Weather Statement	GID	Valley	26 min
Aug 11, 11:44 PM CDT	Special Weather Statement	GID	Greeley, Valley	46 min
Aug 12, 6:26 AM CDT	Special Weather Statement	GID	Osborne, Rooks	34 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2020 Every severe thunderstorm warning 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.