Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 22, NWS Cheyenne, WY

May 16, 2019Box Butte County, Dawes County, Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 16, 2019, 4:09 PM MDT for Box Butte County, Dawes County, Sioux County, Nebraska. It was in force for 13 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: May 16, 2019, 4:09 PM MDT (22:09 UTC)
Expired: May 16, 2019, 4:22 PM MDT
In force: 13 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Box Butte County, NE, Dawes County, NE, Sioux County, NE

The radar

The Rapid City radar (KUDX), 188 km from the middle of the area, began a volume at 22:11 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.2 hours before the alert went out and 271 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: 8 J/kg
Mixed-layer CIN: -511 J/kg
Mixed-layer LCL: 2697 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at May 16, 2:31 PM MDT, 1 hour 38 minutes earlier.

Area forecast discussion, May 16, 2:31 PM MDT, 1 hour 38 minutes before

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Hazardous weather outlook, May 16, 10:52 AM MDT, 5 hours 17 minutes before

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In the hours before

Special weather statement, May 16, 1:25 PM MDT, 2 hours 44 minutes before

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Special weather statement, May 16, 3:33 PM MDT, 36 minutes before

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Special weather statement, May 16, 3:35 PM MDT, 34 minutes before

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Special weather statement, May 16, 3:53 PM MDT, 16 minutes before

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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 16, 1:25 PM MDT	Special Weather Statement	CYS	Cheyenne	35 min
May 16, 3:33 PM MDT	Special Weather Statement	CYS	Banner	27 min
May 16, 3:35 PM MDT	Special Weather Statement	CYS	Sioux	25 min
May 16, 3:53 PM MDT	Special Weather Statement	CYS	Box Butte	52 min
May 16, 4:15 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	45 min
May 16, 4:31 PM MDT	Special Weather Statement	CYS	Box Butte	29 min
May 16, 4:55 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	34 min
May 16, 5:00 PM MDT	Flash Flood Warning	CYS	Box Butte	89 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2019 Every severe thunderstorm warning in 2019

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.