Alert archive / Nebraska / Tornado Watches in 2021
Tornado Watch 196
The Storm Prediction Center issued this tornado watch at May 23, 2021, 12:06 PM MDT for 4 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- May 23, 2021, 12:06 PM MDT (18:06 UTC)
- Expired
- May 23, 2021, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 65 kt
All 42 counties
Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Crowley County, CO, Denver County, CO, El Paso County, CO, Elbert County, CO, Kiowa County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Sherman County, KS, Wallace County, KS, Arthur County, NE, Banner County, NE, Box Butte County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE, Perkins County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Goshen County, WY, Laramie County, WY, Niobrara County, WY
The radar
The Denver radar (KFTG), 103 km from the middle of the area, began a volume at 18:05 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
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
49 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 12:12 PM MDT | Severe Thunderstorm Warning | PUB | El Paso, Pueblo | 33 min |
| May 23, 12:26 PM MDT | Tornado Warning | PUB | El Paso, Pueblo | 34 min |
| May 23, 12:40 PM MDT | Tornado Warning | BOU | Elbert, Lincoln | 19 min |
| May 23, 12:44 PM MDT | Severe Thunderstorm Warning | PUB | El Paso | 32 min |
| May 23, 12:50 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 40 min |
| May 23, 1:24 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 36 min |
| May 23, 1:35 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 29 min |
| May 23, 1:47 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert, Lincoln, Washington | 28 min |
| May 23, 1:59 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara, Platte | 19 min |
| May 23, 2:03 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 42 min |
| May 23, 2:13 PM MDT | Tornado Warning | BOU | Washington | 32 min |
| May 23, 2:38 PM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff, Sioux | 24 min |
| May 23, 2:44 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 31 min |
| May 23, 2:55 PM MDT | Tornado Warning | BOU | Washington | 20 min |
| May 23, 3:11 PM MDT | Tornado Warning | BOU | Logan, Washington | 34 min |
| May 23, 3:14 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert, Lincoln, Washington | 46 min |
| May 23, 3:42 PM MDT | Tornado Warning | BOU | Logan | 33 min |
| May 23, 4:10 PM MDT | Tornado Warning | BOU | Logan | 20 min |
| May 23, 4:22 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 38 min |
| May 23, 4:27 PM MDT | Tornado Warning | BOU | Logan | 23 min |
| May 23, 4:31 PM MDT | Tornado Warning | CYS | Cheyenne | 44 min |
| May 23, 4:33 PM MDT | Tornado Warning | LBF | Deuel, Garden | 42 min |
| May 23, 4:43 PM MDT | Tornado Warning | BOU | Washington | 17 min |
| May 23, 4:58 PM MDT | Tornado Warning | BOU | Washington | 17 min |
| May 23, 5:01 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 29 min |
| May 23, 5:09 PM MDT | Severe Thunderstorm Warning | LBF | Deuel, Garden, Grant | 51 min |
| May 23, 5:13 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips, Washington | 32 min |
| May 23, 5:21 PM MDT | Tornado Warning | GLD | Cheyenne, Kit Carson | 24 min |
| May 23, 5:26 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 34 min |
| May 23, 5:31 PM MDT | Tornado Warning | BOU | Washington | 14 min |
| May 23, 5:48 PM MDT | Severe Thunderstorm Warning | LBF | Cherry, Garden, Grant, Sheridan | 42 min |
| May 23, 5:57 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 33 min |
| May 23, 5:59 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 61 min |
| May 23, 6:00 PM MDT | Severe Thunderstorm Warning | LBF | Arthur, Garden, Grant, Keith | 45 min |
| May 23, 6:01 PM MDT | Tornado Warning | GLD | Yuma | 29 min |
| May 23, 6:18 PM MDT | Severe Thunderstorm Warning | LBF | Deuel, Keith, Perkins | 42 min |
| May 23, 6:19 PM MDT | Severe Thunderstorm Warning | BOU | Phillips, Sedgwick | 41 min |
| May 23, 6:26 PM MDT | Severe Thunderstorm Warning | LBF | Cherry, Grant, Sheridan | 49 min |
| May 23, 6:27 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 48 min |
| May 23, 6:36 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 39 min |
| May 23, 6:39 PM MDT | Severe Thunderstorm Warning | LBF | Arthur, Cherry, Grant, Hooker, McPherson | 51 min |
| May 23, 6:49 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa | 26 min |
| May 23, 6:57 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Keith, Perkins | 63 min |
| May 23, 6:59 PM MDT | Severe Thunderstorm Warning | LBF | Cherry | 46 min |
| May 23, 7:09 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa | 36 min |
| May 23, 7:10 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 50 min |
| May 23, 7:25 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson, Yuma | 50 min |
| May 23, 7:46 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa, Prowers | 29 min |
| May 23, 7:50 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 55 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 6.1 hours before the alert went out and 42 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1106 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
241
WWUS20 KWNS 231803
SEL6
SPC WW 231803
COZ000-KSZ000-NEZ000-WYZ000-240200-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 196
NWS Storm Prediction Center Norman OK
1205 PM MDT Sun May 23 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northeast/East-Central Colorado
Northwest Kansas
Western Nebraska
Southeast Wyoming
* Effective this Sunday afternoon and evening from 1205 PM until
800 PM MDT.
* Primary threats include...
A few tornadoes possible
Scattered large hail likely with isolated very large hail events
to 3 inches in diameter possible
Scattered damaging winds and isolated significant gusts to 75
mph possible
SUMMARY...Severe thunderstorms are expected to quickly develop
through early/mid afternoon, initially along the Colorado/southeast
Wyoming Front Range and immediately adjacent High Plains. Supercells
capable of large hail and a few tornadoes can be expected as storms
mature and quickly progress northeastward across the region.
Damaging winds may also become an increasing risk by early evening.
The tornado watch area is approximately along and 75 statute miles
east and west of a line from 70 miles south southeast of Limon CO to
15 miles north northwest of Chadron NE. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU6).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 21035.
...GuyerSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 10:53 AM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 6 more | 2 hr |
| May 23, 1:57 PM MDT | Mesoscale Discussion | SPC | Kit Carson, Logan, Morgan, Phillips, Sedgwick, Washington and 1 more | 2 hr |
| May 23, 2:41 PM MDT | Mesoscale Discussion | SPC | Baca, Bent, Prowers | 94 min |
| May 23, 4:07 PM MDT | Severe Thunderstorm Watch | SPC | Baca, Bent, Las Animas, Otero, Prowers | 7 hr |
| May 23, 4:37 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Kiowa, Kit Carson, Lincoln, Logan, Phillips and 3 more | 113 min |
| May 23, 1:50 PM MDT | Tornado Watch | SPC | Crook, Weston | 7 hr |
| May 23, 5:25 PM MDT | Mesoscale Discussion | SPC | Niobrara | 95 min |
Nearby
Tornado Watches in Nebraska, 2021Tornado Watches in Colorado, 2021Tornado Watches in Kansas, 2021Every tornado watch in 2021
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.