Alert archive / Texas / Tornado Watches in 2021
Tornado Watch 19
The Storm Prediction Center issued this tornado watch at Mar 13, 2021, 11:36 AM MST for Curry County, Quay County, Roosevelt County, New Mexico; 14 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2021, 11:36 AM MST (18:36 UTC)
- Expired
- Mar 13, 2021, 5:00 PM MST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Curry County, NM, Quay County, NM, Roosevelt County, NM, Bailey County, TX, Castro County, TX, Cochran County, TX, Deaf Smith County, TX, Hale County, TX, Hockley County, TX, Lamb County, TX, Lubbock County, TX, Moore County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Swisher County, TX
The radar
The Amarillo radar (KAMA), 76 km from the middle of the area, began a volume at 18:37 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
- 50%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 20%
- 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
- 50%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 11:47 AM MST | Severe Thunderstorm Warning | ABQ | Quay, Union | 58 min |
| Mar 13, 12:23 PM MST | Severe Thunderstorm Warning | ABQ | Curry, Quay | 22 min |
| Mar 13, 12:54 PM MST | Severe Thunderstorm Warning | AMA | Deaf Smith, Hartley, Oldham | 51 min |
| Mar 13, 1:07 PM MST | Severe Thunderstorm Warning | LUB | Castro, Lamb | 38 min |
| Mar 13, 1:24 PM MST | Severe Thunderstorm Warning | AMA | Deaf Smith, Oldham | 66 min |
| Mar 13, 1:37 PM MST | Severe Thunderstorm Warning | LUB | Castro, Swisher | 23 min |
| Mar 13, 1:42 PM MST | Tornado Warning | AMA | Dallam, Hartley, Moore | 33 min |
| Mar 13, 1:56 PM MST | Tornado Warning | LUB | Castro, Swisher | 19 min |
| Mar 13, 2:01 PM MST | Tornado Warning | LUB | Castro, Hale, Lamb, Swisher | 29 min |
| Mar 13, 2:12 PM MST | Severe Thunderstorm Warning | AMA | Armstrong, Randall | 63 min |
| Mar 13, 2:15 PM MST | Tornado Warning | LUB | Castro, Swisher | 15 min |
| Mar 13, 2:21 PM MST | Tornado Warning | AMA | Randall | 39 min |
| Mar 13, 2:28 PM MST | Tornado Warning | LUB | Castro, Swisher | 32 min |
| Mar 13, 2:30 PM MST | Severe Thunderstorm Warning | AMA | Hartley, Moore, Oldham, Potter | 60 min |
| Mar 13, 2:34 PM MST | Tornado Warning | AMA | Moore | 26 min |
| Mar 13, 2:43 PM MST | Tornado Warning | LUB | Castro, Swisher | 32 min |
| Mar 13, 2:50 PM MST | Tornado Warning | AMA | Armstrong, Randall | 40 min |
| Mar 13, 2:57 PM MST | Tornado Warning | LUB | Swisher | 18 min |
| Mar 13, 3:00 PM MST | Tornado Warning | AMA | Armstrong, Randall | 45 min |
| Mar 13, 3:07 PM MST | Severe Thunderstorm Warning | LUB | Castro, Swisher | 20 min |
| Mar 13, 3:28 PM MST | Tornado Warning | LUB | Briscoe, Floyd, Hale, Swisher | 32 min |
| Mar 13, 3:30 PM MST | Severe Thunderstorm Warning | AMA | Hansford, Hutchinson, Moore, Sherman | 60 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 12:00Z, 6.6 hours before the alert went out and 76 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
- 188 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 540 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.9
The text
As transmitted.
281
WWUS20 KWNS 131833
SEL9
SPC WW 131833
NMZ000-TXZ000-140000-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 19
NWS Storm Prediction Center Norman OK
135 PM CDT Sat Mar 13 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
East-central New Mexico
Northwest Texas
* Effective this Saturday afternoon and evening from 135 PM until
700 PM CDT.
* Primary threats include...
A few tornadoes and a couple intense tornadoes possible
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Initial discrete supercells should develop east-northeast
from the east-central New Mexico and northwest Texas border region.
Tornado and large hail will be the primary hazards.
The tornado watch area is approximately along and 50 statute miles
east and west of a line from 50 miles northwest of Amarillo TX to 65
miles south southeast of Cannon Afb NM. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU9).
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.
&&
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 450. Mean
storm motion vector 21045.
...GramsSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 6:36 AM MST | Mesoscale Discussion | SPC | Harding, Quay, Union | 2 hr |
| Mar 13, 10:48 AM MST | Mesoscale Discussion | SPC | Curry, Roosevelt | 117 min |
| Mar 12, 7:11 PM MST | Mesoscale Discussion | SPC | Baylor, Briscoe, Childress, Cottle, Crosby, Dickens and 18 more | 64 min |
| Mar 12, 7:38 PM MST | Severe Thunderstorm Watch | SPC | Armstrong, Baylor, Briscoe, Carson, Childress, Cochran and 29 more | 5 hr |
| Mar 12, 10:08 PM MST | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 26 more | 2 hr |
| Mar 13, 12:06 AM MST | Mesoscale Discussion | SPC | Childress, Cottle, Foard, Hardeman, Motley | 54 min |
| Mar 13, 12:52 PM MST | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 9 more | 113 min |
| Mar 13, 1:26 PM MST | Tornado Watch | SPC | Armstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 19 more | 7 hr |
| Mar 13, 1:39 PM MST | Mesoscale Discussion | SPC | Andrews, Borden, Crane, Crockett, Dawson, Ector and 18 more | 2 hr |
| Mar 13, 2:23 PM MST | Tornado Watch | SPC | Borden, Coke, Crane, Crockett, Dawson, Fisher and 18 more | 6 hr |
| Mar 13, 2:46 PM MST | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Donley, Floyd, Hale and 5 more | 59 min |
| Mar 13, 3:10 PM MST | Mesoscale Discussion | SPC | Armstrong, Carson, Hutchinson, Randall | 65 min |
| Mar 13, 4:46 PM MST | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 18 more | 89 min |
Nearby
Tornado Watches in Texas, 2021Tornado Watches in New Mexico, 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.