Alert archive / Texas / Tornado Watches in 2021
Tornado Watch 226
The Storm Prediction Center issued this tornado watch at May 30, 2021, 4:42 PM CDT for Cimarron County, Texas County, Oklahoma; 16 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 30, 2021, 4:42 PM CDT (21:42 UTC)
- Expired
- May 31, 2021, 12:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Cimarron County, OK, Texas County, OK, Armstrong County, TX, Carson County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hutchinson County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX
The radar
The Amarillo radar (KAMA), 103 km from the middle of the area, began a volume at 21:42 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
- 30%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 5:08 PM CDT | Tornado Warning | AMA | Cimarron | 28 min |
| May 30, 5:14 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron | 61 min |
| May 30, 5:35 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron | 55 min |
| May 30, 5:39 PM CDT | Tornado Warning | AMA | Cimarron | 51 min |
| May 30, 5:49 PM CDT | Tornado Warning | AMA | Cimarron | 41 min |
| May 30, 6:08 PM CDT | Tornado Warning | AMA | Dallam, Sherman | 52 min |
| May 30, 6:14 PM CDT | Tornado Warning | AMA | Cimarron | 46 min |
| May 30, 6:26 PM CDT | Tornado Warning | AMA | Cimarron | 21 min |
| May 30, 6:54 PM CDT | Tornado Warning | AMA | Cimarron | 51 min |
| May 30, 6:58 PM CDT | Tornado Warning | AMA | Cimarron | 47 min |
| May 30, 7:22 PM CDT | Severe Thunderstorm Warning | AMA | Hartley, Moore, Oldham, Potter | 68 min |
| May 30, 7:29 PM CDT | Tornado Warning | AMA | Sherman | 46 min |
| May 30, 7:46 PM CDT | Severe Thunderstorm Warning | AMA | Dallam, Sherman | 59 min |
| May 30, 8:14 PM CDT | Tornado Warning | AMA | Hansford, Sherman | 46 min |
| May 30, 8:47 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 58 min |
| May 30, 10:27 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Potter, Randall | 63 min |
| May 30, 10:38 PM CDT | Tornado Warning | AMA | Carson, Gray | 22 min |
| May 30, 10:57 PM CDT | Flash Flood Warning | AMA | Armstrong, Carson, Potter, Randall | 4 hr |
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, 9.7 hours before the alert went out and 104 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
- 64 J/kg
- Mixed-layer CIN
- -307 J/kg
- Mixed-layer LCL
- 1320 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
657
WWUS20 KWNS 302136
SEL6
SPC WW 302136
OKZ000-TXZ000-310500-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 226
NWS Storm Prediction Center Norman OK
435 PM CDT Sun May 30 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Oklahoma Panhandle
Texas Panhandle
* Effective this Sunday afternoon from 435 PM until Midnight CDT.
* Primary threats include...
A couple tornadoes possible
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Initially, a supercell across far southeast Colorado may
continue to move southeastward into the western Oklahoma Panhandle
while additional storms develop generally eastward out of northeast
New Mexico. Some supercells capable of large hail can be expected,
and a tornado threat will also exist, particularly with storms
interacting with a west/northwest-east/southeast-oriented outflow
boundary. With time, eventual storm mergers should lead to upscale
quasi-linear growth/organization this evening along with an
increasing damaging wind risk and some continued tornado potential
with embedded circulations.
The tornado watch area is approximately along and 75 statute miles
north and south of a line from 25 miles west southwest of Dalhart TX
to 40 miles east northeast of Borger TX. 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 225...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 29015.
...GuyerSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 7:28 PM CDT | Severe Thunderstorm Watch | SPC | Cimarron, Texas | 8 hr |
| May 29, 9:20 PM CDT | Mesoscale Discussion | SPC | Cimarron | 85 min |
| May 29, 11:59 PM CDT | Mesoscale Discussion | SPC | Cimarron | 61 min |
| May 30, 3:52 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Texas | 113 min |
| May 30, 6:04 PM CDT | Mesoscale Discussion | SPC | Cimarron, Texas | 86 min |
| May 30, 2:00 AM CDT | Mesoscale Discussion | SPC | Castro, Deaf Smith, Oldham, Parmer, Potter, Randall | 60 min |
| May 30, 5:37 PM CDT | Mesoscale Discussion | SPC | Bailey, Briscoe, Castro, Cochran, Cottle, Crosby and 16 more | 83 min |
| May 30, 6:03 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Bailey, Borden, Briscoe, Castro, Childress and 30 more | 7 hr |
Nearby
Tornado Watches in Texas, 2021Tornado Watches in Oklahoma, 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.