Alert archive / Texas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 198
The Storm Prediction Center issued this severe thunderstorm watch at May 23, 2021, 4:07 PM MDT for 5 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 23, 2021, 4:07 PM MDT (22:07 UTC)
- Expired
- May 23, 2021, 11:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 25 counties
Baca County, CO, Bent County, CO, Las Animas County, CO, Otero County, CO, Prowers County, CO, Grant County, KS, Hamilton County, KS, Kearny County, KS, Morton County, KS, Stanton County, KS, Stevens County, KS, Curry County, NM, Harding County, NM, Quay County, NM, Union County, NM, Cimarron County, OK, Texas County, OK, Dallam County, TX, Deaf Smith County, TX, Hartley County, TX, Moore County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Sherman County, TX
The radar
The Amarillo radar (KAMA), 152 km from the middle of the area, began a volume at 22:08 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 4:39 PM MDT | Severe Thunderstorm Warning | AMA | Dallam, Hartley, Oldham | 39 min |
| May 23, 5:05 PM MDT | Severe Thunderstorm Warning | AMA | Cimarron | 38 min |
| May 23, 7:09 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa | 36 min |
| May 23, 7:46 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa, Prowers | 29 min |
| May 23, 7:47 PM MDT | Severe Thunderstorm Warning | ABQ | Guadalupe, Quay, San Miguel | 43 min |
| May 23, 8:03 PM MDT | Severe Thunderstorm Warning | ABQ | Union | 27 min |
| May 23, 8:39 PM MDT | Severe Thunderstorm Warning | AMA | Dallam, Hartley | 66 min |
| May 23, 9:40 PM MDT | Severe Thunderstorm Warning | AMA | Dallam, Hartley | 44 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 10.1 hours before the alert went out and 153 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
- 641 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 510 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
327
WWUS20 KWNS 232205
SEL8
SPC WW 232205
COZ000-KSZ000-NMZ000-OKZ000-TXZ000-240500-
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 198
NWS Storm Prediction Center Norman OK
510 PM CDT Sun May 23 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southeast Colorado
Southwest Kansas
Northeast New Mexico
Western Oklahoma Panhandle
Western Texas Panhandle
* Effective this Sunday afternoon from 510 PM until Midnight CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Isolated thunderstorms are expected to form late this
afternoon along and ahead of the dryline across the watch area, and
persist through much of the evening. The strongest cells will pose
a risk of large hail and damaging wind gusts.
The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 45 miles southeast of
Tucumcari NM to 20 miles northeast of Lamar CO. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 196...WW 197...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
24025.
...HartSPC 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, 12:06 PM MDT | Tornado Watch | SPC | Adams, Arapahoe, Cheyenne, Crowley, Denver, Elbert and 11 more | 8 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, 4:37 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Kiowa, Kit Carson, Lincoln, Logan, Phillips and 3 more | 113 min |
| May 22, 7:21 PM MDT | Mesoscale Discussion | SPC | Dallas, Denton, Ellis, Johnson, Kaufman, Parker and 2 more | 54 min |
| May 23, 1:59 PM MDT | Mesoscale Discussion | SPC | Crane, Ector, Loving, Pecos, Reeves, Ward and 1 more | 91 min |
Nearby
Severe Thunderstorm Watches in Texas, 2021Severe Thunderstorm Watches in Kansas, 2021Severe Thunderstorm Watches in Colorado, 2021Every severe thunderstorm 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.