Alert archive / Texas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 216
The Storm Prediction Center issued this severe thunderstorm watch at May 27, 2021, 3:39 PM CDT for 52 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 27, 2021, 3:39 PM CDT (20:39 UTC)
- Expired
- May 27, 2021, 11:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 65 kt
All 52 counties
Archer County, TX, Baylor County, TX, Borden County, TX, Brewster County, TX, Briscoe County, TX, Callahan County, TX, Childress County, TX, Coke County, TX, Collingsworth County, TX, Cottle County, TX, Crane County, TX, Crockett County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Donley County, TX, Ector County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Pecos County, TX, Reagan County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Midland/Odessa radar (KMAF), 67 km from the middle of the area, began a volume at 20:42 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 60%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
28 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 3:45 PM CDT | Severe Thunderstorm Warning | MAF | Pecos, Terrell | 60 min |
| May 27, 4:19 PM CDT | Severe Thunderstorm Warning | MAF | Ector, Midland | 56 min |
| May 27, 4:41 PM CDT | Severe Thunderstorm Warning | MAF | Brewster, Jeff Davis, Pecos | 64 min |
| May 27, 4:44 PM CDT | Severe Thunderstorm Warning | MAF | Pecos, Terrell | 38 min |
| May 27, 5:01 PM CDT | Severe Thunderstorm Warning | MAF | Howard, Martin | 59 min |
| May 27, 5:14 PM CDT | Severe Thunderstorm Warning | MAF | Martin, Midland | 37 min |
| May 27, 5:25 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 49 min |
| May 27, 6:03 PM CDT | Severe Thunderstorm Warning | MAF | Brewster, Pecos, Terrell | 72 min |
| May 27, 6:15 PM CDT | Severe Thunderstorm Warning | MAF | Glasscock | 60 min |
| May 27, 6:40 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Sterling | 65 min |
| May 27, 6:55 PM CDT | Severe Thunderstorm Warning | LUB | Briscoe, Floyd, Hall, Motley | 50 min |
| May 27, 7:04 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Donley | 37 min |
| May 27, 7:12 PM CDT | Severe Thunderstorm Warning | MAF | Brewster, Pecos, Terrell | 93 min |
| May 27, 7:24 PM CDT | Flash Flood Warning | SJT | Coke, Sterling | 3 hr |
| May 27, 7:28 PM CDT | Severe Thunderstorm Warning | MAF | Glasscock | 40 min |
| May 27, 7:40 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Sterling | 65 min |
| May 27, 7:51 PM CDT | Severe Thunderstorm Warning | OUN | Hardeman | 39 min |
| May 27, 8:04 PM CDT | Flash Flood Warning | SJT | Sterling | 3 hr |
| May 27, 8:10 PM CDT | Severe Thunderstorm Warning | LUB | Cottle | 27 min |
| May 27, 8:11 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Runnels | 64 min |
| May 27, 8:26 PM CDT | Severe Thunderstorm Warning | OUN | Hardeman, Wilbarger | 49 min |
| May 27, 8:39 PM CDT | Severe Thunderstorm Warning | SJT | Runnels, Tom Green | 66 min |
| May 27, 8:41 PM CDT | Severe Thunderstorm Warning | MAF | Brewster, Terrell | 79 min |
| May 27, 9:06 PM CDT | Severe Thunderstorm Warning | OUN | Wilbarger | 39 min |
| May 27, 10:04 PM CDT | Severe Thunderstorm Warning | OUN | Clay, Wichita | 41 min |
| May 27, 10:28 PM CDT | Severe Thunderstorm Warning | LUB | Cottle | 32 min |
| May 27, 10:36 PM CDT | Severe Thunderstorm Warning | OUN | Foard | 39 min |
| May 27, 11:00 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 45 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
Midland Regional, TX (KMAF), launched 12:00Z, 8.7 hours before the alert went out and 68 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
- 1927 J/kg
- Mixed-layer CIN
- -261 J/kg
- Mixed-layer LCL
- 1145 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 246 m²/s²
- 0-3 km storm-relative helicity
- 245 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
212
WWUS20 KWNS 272036
SEL6
SPC WW 272036
TXZ000-280400-
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 216
NWS Storm Prediction Center Norman OK
340 PM CDT Thu May 27 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
West and West Central Texas
* Effective this Thursday afternoon and evening from 340 PM until
1100 PM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph likely
Scattered large hail and isolated very large hail events to 2.5
inches in diameter likely
A tornado or two possible
SUMMARY...Thunderstorms will form along the dryline, and along a
cold front sagging into west Texas this afternoon. Supercells
capable of very large hail and damaging winds will be possible.
The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 35 miles southwest of
Dryden TX to 15 miles west northwest of Altus OK. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).
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 214...WW 215...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27030.
...HartSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 7:32 PM CDT | Mesoscale Discussion | SPC | Beaver, Ellis, Harper | 88 min |
| May 26, 11:26 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 20 more | 64 min |
| May 27, 11:04 AM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Craig, Delaware, Mayes, Nowata and 5 more | 86 min |
| May 27, 11:29 AM CDT | Mesoscale Discussion | SPC | Adair, Alfalfa, Beckham, Blaine, Caddo, Canadian and 39 more | 61 min |
| May 27, 11:58 AM CDT | Tornado Watch | SPC | Adair, Alfalfa, Atoka, Beckham, Blaine, Bryan and 66 more | 9 hr |
| May 27, 1:39 PM CDT | Mesoscale Discussion | SPC | Blaine, Garfield, Grant, Kay, Kingfisher, Logan and 6 more | 66 min |
| May 27, 3:25 PM CDT | Mesoscale Discussion | SPC | Blaine, Canadian, Craig, Creek, Custer, Dewey and 13 more | 95 min |
| May 27, 5:34 PM CDT | Mesoscale Discussion | SPC | Caddo, Cleveland, Comanche, Garvin, Grady, McClain and 2 more | 56 min |
| May 27, 6:24 PM CDT | Mesoscale Discussion | SPC | Harmon | 2 hr |
| May 27, 2:50 PM CDT | Mesoscale Discussion | SPC | Borden, Childress, Coke, Collingsworth, Cottle, Crane and 34 more | 115 min |
Nearby
Severe Thunderstorm Watches in Texas, 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.