Alert archive / Nebraska / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 271, NWS Cheyenne, WY

July 13, 2023Dawes County, Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 13, 2023, 3:44 PM MDT for Dawes County, Sioux County, Nebraska. It was in force for 31 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: Jul 13, 2023, 3:44 PM MDT (21:44 UTC)
Expired: Jul 13, 2023, 4:15 PM MDT
In force: 31 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dawes County, NE, Sioux County, NE

The radar

The Rapid City radar (KUDX), 176 km from the middle of the area, began a volume at 21:44 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 13, 1:49 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.7 hours before the alert went out and 169 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: 9 J/kg
Mixed-layer CIN: -357 J/kg
Mixed-layer LCL: 2668 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: -29 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 Jul 13, 2:53 PM MDT, 51 minutes earlier.

Area forecast discussion, Jul 13, 2:53 PM MDT, 51 minutes before

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Hazardous weather outlook, Jul 13, 2:15 AM MDT, 13 hours 29 minutes before

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In the hours before

Special weather statement, Jul 13, 1:31 PM MDT, 2 hours 13 minutes before

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Special weather statement, Jul 13, 1:45 PM MDT, 1 hour 59 minutes before

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Special weather statement, Jul 13, 2:45 PM MDT, 59 minutes before

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Special weather statement, Jul 13, 3:13 PM MDT, 31 minutes before

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Special weather statement, Jul 13, 3:41 PM MDT, 3 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
Jul 13, 1:31 PM MDT	Special Weather Statement	CYS	Platte	29 min
Jul 13, 1:45 PM MDT	Special Weather Statement	CYS	Goshen	30 min
Jul 13, 2:45 PM MDT	Special Weather Statement	CYS	Niobrara	30 min
Jul 13, 3:13 PM MDT	Special Weather Statement	CYS	Goshen	32 min
Jul 12, 6:45 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Banner, Box Butte, Cheyenne, Morrill, Scotts Bluff, Sioux	45 min
Jul 12, 7:19 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Cheyenne, Morrill	41 min
Jul 13, 1:10 AM MDT	Special Weather Statement	CYS	Box Butte	50 min
Jul 13, 1:44 AM MDT	Special Weather Statement	CYS	Box Butte	31 min
Jul 13, 3:41 PM MDT	Special Weather Statement	CYS	Sioux	34 min
Jul 13, 4:03 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	27 min
Jul 13, 4:17 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Morrill, Scotts Bluff	43 min
Jul 13, 4:29 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Dawes	25 min
Jul 13, 4:50 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Morrill	40 min
Jul 13, 4:56 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	23 min
Jul 13, 5:32 PM MDT	Special Weather Statement	CYS	Cheyenne	28 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2023 Every severe thunderstorm warning in 2023

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.