Alert archive / Texas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 371
The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2021, 11:16 AM MDT for 6 counties in New Mexico; 20 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2021, 11:16 AM MDT (17:16 UTC)
- Expired
- Jul 11, 2021, 6:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 55 kt
All 26 counties
Chaves County, NM, De Baca County, NM, Eddy County, NM, Lea County, NM, Lincoln County, NM, Roosevelt County, NM, Andrews County, TX, Borden County, TX, Cochran County, TX, Dawson County, TX, Ector County, TX, Gaines County, TX, Garza County, TX, Glasscock County, TX, Hockley County, TX, Howard County, TX, Kent County, TX, Loving County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Mitchell County, TX, Scurry County, TX, Terry County, TX, Winkler County, TX, Yoakum County, TX
The radar
The Cannon AFB radar (KFDX), 139 km from the middle of the area, began a volume at 17:15 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
- 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
- 70%
Warnings issued inside it
27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 11:56 AM MDT | Severe Thunderstorm Warning | ABQ | Chaves | 49 min |
| Jul 11, 12:03 PM MDT | Severe Thunderstorm Warning | MAF | Lea | 57 min |
| Jul 11, 12:14 PM MDT | Severe Thunderstorm Warning | LUB | Cochran, Yoakum | 47 min |
| Jul 11, 12:38 PM MDT | Flash Flood Warning | ABQ | Chaves | 3 hr |
| Jul 11, 12:54 PM MDT | Severe Thunderstorm Warning | LUB | Cochran, Hockley, Terry, Yoakum | 66 min |
| Jul 11, 1:15 PM MDT | Severe Thunderstorm Warning | ABQ | Chaves | 45 min |
| Jul 11, 1:49 PM MDT | Severe Thunderstorm Warning | LUB | Hockley, Terry | 56 min |
| Jul 11, 1:56 PM MDT | Severe Thunderstorm Warning | LUB | Bailey, Cochran, Hockley, Lamb | 20 min |
| Jul 11, 1:59 PM MDT | Severe Thunderstorm Warning | ABQ | Chaves | 46 min |
| Jul 11, 2:06 PM MDT | Flash Flood Warning | LUB | Cochran, Hockley, Terry, Yoakum | 81 min |
| Jul 11, 2:08 PM MDT | Severe Thunderstorm Warning | ABQ | Chaves | 52 min |
| Jul 11, 2:12 PM MDT | Severe Thunderstorm Warning | LUB | Garza, Kent | 31 min |
| Jul 11, 2:23 PM MDT | Flash Flood Warning | ABQ | Chaves | 3 hr |
| Jul 11, 2:25 PM MDT | Severe Thunderstorm Warning | LUB | Lynn, Terry | 25 min |
| Jul 11, 2:44 PM MDT | Severe Thunderstorm Warning | ABQ | Chaves | 46 min |
| Jul 11, 2:58 PM MDT | Severe Thunderstorm Warning | ABQ | Chaves | 62 min |
| Jul 11, 3:22 PM MDT | Severe Thunderstorm Warning | ABQ | Chaves, Lincoln | 38 min |
| Jul 11, 3:27 PM MDT | Severe Thunderstorm Warning | ABQ | Chaves | 33 min |
| Jul 11, 3:28 PM MDT | Severe Thunderstorm Warning | MAF | Eddy | 62 min |
| Jul 11, 3:34 PM MDT | Severe Thunderstorm Warning | ABQ | Roosevelt | 41 min |
| Jul 11, 3:57 PM MDT | Severe Thunderstorm Warning | ABQ | Chaves, Roosevelt | 32 min |
| Jul 11, 3:59 PM MDT | Severe Thunderstorm Warning | ABQ | Lincoln | 46 min |
| Jul 11, 4:31 PM MDT | Severe Thunderstorm Warning | MAF | Eddy | 59 min |
| Jul 11, 4:50 PM MDT | Severe Thunderstorm Warning | ABQ | Lincoln | 40 min |
| Jul 11, 4:54 PM MDT | Severe Thunderstorm Warning | ABQ | Lincoln | 51 min |
| Jul 11, 5:21 PM MDT | Flash Flood Warning | MAF | Glasscock | 4 hr |
| Jul 11, 5:48 PM MDT | Severe Thunderstorm Warning | ABQ | Lincoln | 57 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, 5.3 hours before the alert went out and 238 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
- 964 J/kg
- Mixed-layer CIN
- -244 J/kg
- Mixed-layer LCL
- 1122 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
900
WWUS20 KWNS 111713
SEL1
SPC WW 111713
NMZ000-TXZ000-120000-
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 371
NWS Storm Prediction Center Norman OK
1115 AM MDT Sun Jul 11 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southeast New Mexico
West/Southwest Texas
* Effective this Sunday morning and evening from 1115 AM until
600 PM MDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Isolated damaging wind gusts to 65 mph possible
SUMMARY...Within a seasonally moist air mass, scattered strong to
severe thunderstorms will continue to develop across the region this
afternoon and generally drift southward. The strongest storms will
be capable of large hail and severe-caliber wind gusts.
The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 60 miles west northwest
of Roswell NM to 50 miles north northeast of Midland TX. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU1).
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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 55 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
35020.
...GuyerSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 8:49 PM MDT | Mesoscale Discussion | SPC | Colfax, Harding, Mora | 86 min |
| Jul 11, 10:48 AM MDT | Mesoscale Discussion | SPC | Eddy, Lea | 87 min |
| Jul 11, 1:33 PM MDT | Mesoscale Discussion | SPC | Bernalillo, Chaves, De Baca, Doña Ana, Eddy, Grant and 12 more | 87 min |
| Jul 11, 2:23 PM MDT | Severe Thunderstorm Watch | SPC | Bernalillo, Catron, Cibola, Doña Ana, Grant, Guadalupe and 14 more | 8 hr |
| Jul 11, 5:18 PM MDT | Mesoscale Discussion | SPC | Doña Ana, Otero | 87 min |
| Jul 10, 8:21 PM MDT | Mesoscale Discussion | SPC | Clay, Wichita | 84 min |
| Jul 10, 8:35 PM MDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Clay, Cooke, Foard, Grayson and 5 more | 5 hr |
| Jul 10, 10:56 PM MDT | Mesoscale Discussion | SPC | Clay, Cooke, Grayson, Hardeman, Montague, Wichita and 1 more | 94 min |
| Jul 11, 1:46 AM MDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Collin, Denton, Foard and 6 more | 29 min |
| Jul 11, 5:51 PM MDT | Mesoscale Discussion | SPC | Anderson, Bell, Cherokee, Coke, Concho, Coryell and 22 more | 84 min |
Nearby
Severe Thunderstorm Watches in Texas, 2021Severe Thunderstorm Watches in New Mexico, 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.