Alert archive / Nebraska / Tornado Watches in 2023

Tornado Watch 350

June 21, 20234 counties in Colorado; 6 counties in Nebraska; 6 counties in Wyoming

The Storm Prediction Center issued this tornado watch at Jun 21, 2023, 12:33 PM MDT for 4 counties in Colorado; 6 counties in Nebraska; 6 counties in Wyoming. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 21, 2023, 12:33 PM MDT (18:33 UTC)
Expired: Jun 21, 2023, 8:00 PM MDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 4 in
Strongest gust expected: 60 kt

Counties Logan County, CO, Morgan County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Albany County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 77 km from the middle of the area, began a volume at 18:34 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 50%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 60%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 95%
One or more hailstones of 2 inches or more: 80%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

80 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 21, 12:49 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	41 min
Jun 21, 1:08 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	52 min
Jun 21, 1:11 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Cheyenne	49 min
Jun 21, 1:17 PM MDT	Severe Thunderstorm Warning	BOU	Logan	43 min
Jun 21, 1:24 PM MDT	Tornado Warning	CYS	Cheyenne	36 min
Jun 21, 1:53 PM MDT	Severe Thunderstorm Warning	BOU	Logan	52 min
Jun 21, 1:59 PM MDT	Severe Thunderstorm Warning	BOU	Washington	46 min
Jun 21, 2:00 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	30 min
Jun 21, 2:02 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Carbon	43 min
Jun 21, 2:11 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Laramie	49 min
Jun 21, 2:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Logan	23 min
Jun 21, 2:36 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Washington	19 min
Jun 21, 2:39 PM MDT	Severe Thunderstorm Warning	BOU	Washington	36 min
Jun 21, 2:42 PM MDT	Severe Thunderstorm Warning	BOU	Logan	33 min
Jun 21, 2:45 PM MDT	Severe Thunderstorm Warning	CYS	Albany	45 min
Jun 21, 2:48 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	42 min
Jun 21, 2:54 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	51 min
Jun 21, 2:59 PM MDT	Tornado Warning	CYS	Albany	31 min
Jun 21, 3:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Logan	36 min
Jun 21, 3:09 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Scotts Bluff	51 min
Jun 21, 3:11 PM MDT	Severe Thunderstorm Warning	BOU	Washington	34 min
Jun 21, 3:24 PM MDT	Flash Flood Warning	BOU	Logan	3 hr
Jun 21, 3:29 PM MDT	Tornado Warning	CYS	Albany	15 min
Jun 21, 3:33 PM MDT	Tornado Warning	BOU	Logan	27 min
Jun 21, 3:39 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	51 min
Jun 21, 3:42 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Washington	33 min
Jun 21, 3:51 PM MDT	Tornado Warning Tornado observed	BOU	Logan, Morgan, Washington	24 min
Jun 21, 3:53 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Logan	37 min
Jun 21, 4:01 PM MDT	Severe Thunderstorm Warning	BOU	Weld	29 min
Jun 21, 4:05 PM MDT	Tornado Warning	BOU	Washington	25 min
Jun 21, 4:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Albany, Platte	46 min
Jun 21, 4:21 PM MDT	Tornado Warning	BOU	Washington	24 min
Jun 21, 4:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan, Washington	23 min
Jun 21, 4:23 PM MDT	Severe Thunderstorm Warning	BOU	Weld	37 min
Jun 21, 4:37 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Washington	23 min
Jun 21, 4:39 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	51 min
Jun 21, 4:42 PM MDT	Flash Flood Warning	BOU	Morgan, Washington	3 hr
Jun 21, 4:45 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan	45 min
Jun 21, 4:46 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Washington	29 min
Jun 21, 4:47 PM MDT	Tornado Warning	BOU	Morgan, Weld	28 min
Jun 21, 4:54 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Washington	21 min
Jun 21, 4:54 PM MDT	Flash Flood Warning	CYS	Kimball	3 hr
Jun 21, 5:07 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Morgan, Weld	38 min
Jun 21, 5:10 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Washington	35 min
Jun 21, 5:10 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	50 min
Jun 21, 5:13 PM MDT	Tornado Warning	BOU	Logan	17 min
Jun 21, 5:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan	44 min
Jun 21, 5:17 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Platte	43 min
Jun 21, 5:25 PM MDT	Tornado Warning	BOU	Logan	20 min
Jun 21, 5:27 PM MDT	Tornado Warning	BOU	Morgan, Washington	33 min
Jun 21, 5:27 PM MDT	Severe Thunderstorm Warning Considerable damage threat	CYS	Sioux	28 min
Jun 21, 5:28 PM MDT	Severe Thunderstorm Warning	BOU	Washington	32 min
Jun 21, 5:29 PM MDT	Severe Thunderstorm Warning	CYS	Laramie, Platte	19 min
Jun 21, 5:36 PM MDT	Severe Thunderstorm Warning	CYS	Platte	39 min
Jun 21, 5:41 PM MDT	Tornado Warning	BOU	Logan	19 min
Jun 21, 5:45 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Washington	30 min
Jun 21, 5:52 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Washington	23 min
Jun 21, 5:52 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara	20 min
Jun 21, 5:54 PM MDT	Severe Thunderstorm Warning	BOU	Logan	36 min
Jun 21, 6:01 PM MDT	Severe Thunderstorm Warning	BOU	Washington	29 min
Jun 21, 6:06 PM MDT	Flash Flood Warning	CYS	Albany, Laramie, Platte	5 hr
Jun 21, 6:11 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Washington	34 min
Jun 21, 6:19 PM MDT	Flash Flood Warning	BOU	Logan	3 hr
Jun 21, 6:23 PM MDT	Tornado Warning	BOU	Logan	22 min
Jun 21, 6:24 PM MDT	Severe Thunderstorm Warning	BOU	Washington	51 min
Jun 21, 6:26 PM MDT	Tornado Warning	BOU	Washington	34 min
Jun 21, 6:36 PM MDT	Severe Thunderstorm Warning	CYS	Albany	24 min
Jun 21, 6:47 PM MDT	Severe Thunderstorm Warning	BOU	Weld	43 min
Jun 21, 6:48 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Converse, Platte	27 min
Jun 21, 6:53 PM MDT	Tornado Warning Considerable damage threat	BOU	Washington	37 min
Jun 21, 7:03 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Laramie	42 min
Jun 21, 7:13 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	47 min
Jun 21, 7:18 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Weld	27 min
Jun 21, 7:26 PM MDT	Severe Thunderstorm Warning	BOU	Washington	34 min
Jun 21, 7:27 PM MDT	Flash Flood Warning	BOU	Morgan, Washington	3 hr
Jun 21, 7:36 PM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	39 min
Jun 21, 7:39 PM MDT	Tornado Warning	BOU	Washington	15 min
Jun 21, 7:43 PM MDT	Tornado Warning	CYS	Goshen	17 min
Jun 21, 7:49 PM MDT	Flash Flood Warning	CYS	Goshen, Platte	3 hr
Jun 21, 7:56 PM MDT	Severe Thunderstorm Warning	BOU	Washington	17 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 20, 6:15 PM MDT	Mesoscale Discussion	SPC	Phillips, Sedgwick, Yuma	90 min
Jun 21, 11:51 AM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 9 more	2 hr
Jun 21, 12:36 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more	9 hr
Jun 21, 2:45 PM MDT	Mesoscale Discussion	SPC	Logan, Morgan, Washington, Weld	90 min
Jun 21, 2:49 PM MDT	Mesoscale Discussion	SPC	Arapahoe, Boulder, Broomfield, Denver, Douglas, Elbert and 3 more	86 min
Jun 21, 3:52 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Crowley, Kiowa, Kit Carson and 4 more	53 min
Jun 21, 4:23 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Cheyenne, Crowley, El Paso, Huerfano and 7 more	6 hr
Jun 21, 5:07 PM MDT	Mesoscale Discussion	SPC	Morgan, Washington, Weld	83 min
Jun 21, 5:25 PM MDT	Mesoscale Discussion	SPC	Boulder, Broomfield, Denver, Douglas, Elbert, Jefferson and 1 more	65 min
Jun 20, 7:40 PM MDT	Mesoscale Discussion	SPC	Cherry	2 hr
Jun 20, 7:58 PM MDT	Severe Thunderstorm Watch	SPC	Campbell, Crook, Weston	4 hr
Jun 20, 10:50 PM MDT	Mesoscale Discussion	SPC	Niobrara, Weston	115 min

Nearby

Tornado Watches in Nebraska, 2023 Tornado Watches in Wyoming, 2023 Tornado Watches in Colorado, 2023 Every tornado watch 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; radar from the NEXRAD Level II archive.