Alert archive / Texas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 134
The Storm Prediction Center issued this severe thunderstorm watch at May 3, 2021, 6:36 PM CDT for 14 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 3, 2021, 6:36 PM CDT (23:36 UTC)
- Expired
- May 4, 2021, 12:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Callahan County, TX, Eastland County, TX, Fisher County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Shackelford County, TX, Stephens County, TX, Taylor County, TX, Throckmorton County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 49 km from the middle of the area, began a volume at 23:40 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 80%
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 3, 6:56 PM CDT | Severe Thunderstorm Warning | FWD | Cooke, Denton, Montague, Wise | 53 min |
| May 3, 7:24 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Jones, Nolan, Taylor | 39 min |
| May 3, 7:28 PM CDT | Severe Thunderstorm Warning | SJT | Nolan, Taylor | 36 min |
| May 3, 8:09 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Jones | 66 min |
| May 3, 8:48 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Nolan | 42 min |
| May 3, 9:05 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Jones, Shackelford | 55 min |
| May 3, 9:53 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford, Throckmorton | 52 min |
| May 3, 10:03 PM CDT | Severe Thunderstorm Warning | FWD | Stephens, Young | 41 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
Fort Worth, TX (KFWD), launched 12:00Z, 11.6 hours before the alert went out and 205 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
- 1296 J/kg
- Mixed-layer CIN
- -475 J/kg
- Mixed-layer LCL
- 1712 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 480 m²/s²
- 0-3 km storm-relative helicity
- 456 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
425
WWUS20 KWNS 032333
SEL4
SPC WW 032333
TXZ000-040500-
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 134
NWS Storm Prediction Center Norman OK
635 PM CDT Mon May 3 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Parts of northwest Texas
* Effective this Monday night from 635 PM until Midnight CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2.5
inches in diameter likely
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Isolated supercells are expected to continue spreading
eastward to the cool side of a surface front, from west central into
northwest Texas. The strongest storms will be capable of producing
isolated very large hail and damaging gusts into the early overnight
hours.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 60 miles west northwest
of Abilene TX to 20 miles east northeast of Mineral Wells TX. 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 128...WW 130...WW
131...WW 132...WW 133...
AVIATION...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
27030.
...ThompsonSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 12:44 PM CDT | Mesoscale Discussion | SPC | Dallam, Deaf Smith, Hartley, Moore, Oldham | 2 hr |
| May 3, 2:24 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Cochran, Dawson, Fisher, Gaines and 12 more | 2 hr |
| May 3, 3:14 PM CDT | Mesoscale Discussion | SPC | Bosque, Collin, Comanche, Cooke, Dallas, Delta and 24 more | 2 hr |
| May 3, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Borden, Cochran, Crosby, Dawson, Gaines and 12 more | 6 hr |
| May 3, 3:48 PM CDT | Tornado Watch | SPC | Bell, Bosque, Collin, Comanche, Cooke, Coryell and 27 more | 7 hr |
| May 3, 5:12 PM CDT | Mesoscale Discussion | SPC | Borden, Cochran, Dawson, Gaines, Garza, Lynn and 3 more | 93 min |
| May 3, 5:55 PM CDT | Mesoscale Discussion | SPC | Bosque, Cooke, Denton, Grayson, Johnson, Somervell and 1 more | 95 min |
| May 3, 5:56 PM CDT | Mesoscale Discussion | SPC | Frio, La Salle, Medina | 94 min |
| May 3, 6:19 PM CDT | Mesoscale Discussion | SPC | Callahan, Eastland, Fisher, Haskell, Jack, Jones and 8 more | 116 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.