Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 273, NWS Cheyenne, WY

July 30, 2019Niobrara County, Wyoming; Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 30, 2019, 5:39 PM MDT for Niobrara County, Wyoming; Sioux County, Nebraska. It was in force for 36 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 30, 2019, 5:39 PM MDT (23:39 UTC)
Expired: Jul 30, 2019, 6:15 PM MDT
In force: 36 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Sioux County, NE, Niobrara County, WY

The radar

The Rapid City radar (KUDX), 183 km from the middle of the area, began a volume at 23:39 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 30, 5:08 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

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 29, 5:49 PM MDT, 23 hours 50 minutes earlier.

Area forecast discussion, Jul 29, 5:49 PM MDT, 23 hours 50 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 29, 8:17 PM MDT	Red Flag Warning	CYS		24 hr
Jul 29, 10:23 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	52 min
Jul 30, 4:06 PM MDT	Special Weather Statement	CYS	Niobrara	39 min
Jul 30, 4:57 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	33 min
Jul 29, 6:44 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	46 min
Jul 29, 6:49 PM MDT	Areal Flood Advisory	CYS	Box Butte	3 hr
Jul 29, 7:08 PM MDT	Special Weather Statement	CYS	Dawes	37 min
Jul 29, 7:20 PM MDT	Flash Flood Warning	CYS	Box Butte	117 min
Jul 29, 7:30 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	60 min
Jul 29, 9:42 PM MDT	Special Weather Statement	CYS	Sioux	33 min
Jul 29, 10:15 PM MDT	Special Weather Statement	CYS	Sioux	45 min
Jul 29, 10:48 PM MDT	Severe Thunderstorm Warning	CYS	Dawes, Sioux	42 min
Jul 29, 11:22 PM MDT	Special Weather Statement	CYS	Box Butte	53 min
Jul 29, 11:27 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	16 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2019 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; radar from the NEXRAD Level II archive.