Alert archive / Texas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 224
The Storm Prediction Center issued this severe thunderstorm watch at May 29, 2021, 6:28 PM MDT for Harding County, Union County, New Mexico; Cimarron County, Texas County, Oklahoma; 4 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- May 29, 2021, 6:28 PM MDT (00:28 UTC)
- Expired
- May 30, 2021, 2:00 AM MDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Harding County, NM, Union County, NM, Cimarron County, OK, Texas County, OK, Dallam County, TX, Hartley County, TX, Oldham County, TX, Sherman County, TX
The radar
The Amarillo radar (KAMA), 186 km from the middle of the area, began a volume at 00:31 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
- 10%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- 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
- 60%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 6:43 PM MDT | Tornado Warning | ABQ | Union | 47 min |
| May 29, 6:45 PM MDT | Tornado Warning | AMA | Cimarron | 45 min |
| May 29, 7:27 PM MDT | Tornado Warning | ABQ | Union | 24 min |
| May 29, 7:27 PM MDT | Tornado Warning | AMA | Cimarron | 48 min |
| May 29, 7:42 PM MDT | Severe Thunderstorm Warning | ABQ | Harding, Mora | 33 min |
| May 29, 8:05 PM MDT | Tornado Warning | AMA | Cimarron | 55 min |
| May 29, 8:08 PM MDT | Severe Thunderstorm Warning | ABQ | Harding | 15 min |
| May 29, 8:20 PM MDT | Severe Thunderstorm Warning | ABQ | Harding, Mora, San Miguel | 25 min |
| May 29, 8:43 PM MDT | Severe Thunderstorm Warning | ABQ | Harding, Mora, San Miguel | 62 min |
| May 29, 8:51 PM MDT | Tornado Warning | AMA | Cimarron | 54 min |
| May 29, 9:41 PM MDT | Severe Thunderstorm Warning | AMA | Cimarron | 64 min |
| May 29, 10:06 PM MDT | Severe Thunderstorm Warning | ABQ | Harding, San Miguel | 39 min |
| May 29, 10:43 PM MDT | Severe Thunderstorm Warning | ABQ | Harding, San Miguel | 62 min |
| May 29, 11:42 PM MDT | Severe Thunderstorm Warning | ABQ | Harding, Quay, San Miguel | 49 min |
| May 30, 12:08 AM MDT | Severe Thunderstorm Warning | AMA | Hartley, Oldham | 64 min |
| May 30, 12:10 AM MDT | Severe Thunderstorm Warning | ABQ | Quay, Union | 20 min |
| May 30, 12:40 AM MDT | Tornado Warning | AMA | Oldham | 16 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 00:00Z, 0.5 hours before the alert went out and 187 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
- 70 J/kg
- Mixed-layer CIN
- -344 J/kg
- Mixed-layer LCL
- 758 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
171
WWUS20 KWNS 300026
SEL4
SPC WW 300026
NMZ000-OKZ000-TXZ000-300600-
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 224
NWS Storm Prediction Center Norman OK
730 PM CDT Sat May 29 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northeast New Mexico
Oklahoma Panhandle
Texas Panhandle
* Effective this Saturday night and Sunday morning from 730 PM
until 100 AM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Initially, an isolated supercell moving southeastward
between Kim and Campo, Colorado will move into the western Oklahoma
Panhandle. Other development may occur across northeast New Mexico
and/or across other parts of southeast Colorado this evening via an
upscale-growing cluster of storms.
The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 50 miles west southwest
of Clayton NM to 25 miles south southeast of Elkhart KS. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
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 223...
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
29020.
...GuyerSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 10:37 PM MDT | Mesoscale Discussion | SPC | Hamilton, Morton, Stanton | 53 min |
| May 29, 8:20 PM MDT | Mesoscale Discussion | SPC | Harding, Union | 85 min |
| May 29, 10:59 PM MDT | Mesoscale Discussion | SPC | Harding, Union | 61 min |
| May 30, 11:08 AM MDT | Mesoscale Discussion | SPC | Chaves, Colfax, Curry, De Baca, Eddy, Guadalupe and 10 more | 97 min |
| May 30, 11:41 AM MDT | Severe Thunderstorm Watch | SPC | Chaves, Colfax, Curry, De Baca, Guadalupe, Harding and 9 more | 8 hr |
| May 30, 5:03 PM MDT | Severe Thunderstorm Watch | SPC | Eddy, Lea | 7 hr |
| May 30, 5:43 PM MDT | Mesoscale Discussion | SPC | Chaves, De Baca, Guadalupe, Lincoln, Roosevelt, Torrance | 62 min |
| May 30, 2:52 PM MDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Texas | 113 min |
| May 30, 3:42 PM MDT | Tornado Watch | SPC | Cimarron, Texas | 7 hr |
| May 30, 5:04 PM MDT | Mesoscale Discussion | SPC | Cimarron, Texas | 86 min |
| May 30, 1:00 AM MDT | Mesoscale Discussion | SPC | Castro, Deaf Smith, Oldham, Parmer, Potter, Randall | 60 min |
| May 30, 4:37 PM MDT | Mesoscale Discussion | SPC | Bailey, Briscoe, Castro, Cochran, Cottle, Crosby and 16 more | 83 min |
Nearby
Severe Thunderstorm Watches in Texas, 2021Severe Thunderstorm Watches in New Mexico, 2021Severe Thunderstorm Watches in Oklahoma, 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.