Alert archive / Texas / Tornado Watches in 2021
Tornado Watch 17
The Storm Prediction Center issued this tornado watch at Mar 12, 2021, 2:24 PM MST for Curry County, Quay County, Roosevelt County, New Mexico; 27 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 12, 2021, 2:24 PM MST (21:24 UTC)
- Expired
- Mar 12, 2021, 7:38 PM MST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 65 kt
All 30 counties
Curry County, NM, Quay County, NM, Roosevelt County, NM, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Parmer County, TX, Randall County, TX, Swisher County, TX, Terry County, TX, Yoakum County, TX
The radar
The Lubbock radar (KLBB), 72 km from the middle of the area, began a volume at 21:29 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 4:08 PM MST | Tornado Warning | LUB | Hale, Lubbock | 37 min |
| Mar 12, 4:44 PM MST | Severe Thunderstorm Warning | LUB | Crosby, Hale, Lubbock | 30 min |
| Mar 12, 4:50 PM MST | Severe Thunderstorm Warning | LUB | Crosby, Lubbock | 55 min |
| Mar 12, 5:00 PM MST | Severe Thunderstorm Warning | LUB | Crosby, Floyd | 45 min |
| Mar 12, 5:06 PM MST | Severe Thunderstorm Warning | LUB | Floyd, Hale | 39 min |
| Mar 12, 5:11 PM MST | Severe Thunderstorm Warning | AMA | Deaf Smith, Oldham | 36 min |
| Mar 12, 5:19 PM MST | Tornado Warning | LUB | Crosby, Dickens, Floyd, Motley | 26 min |
| Mar 12, 5:42 PM MST | Severe Thunderstorm Warning | LUB | Crosby, Dickens, Floyd, Motley | 63 min |
| Mar 12, 6:20 PM MST | Tornado Warning | LUB | Dickens, Motley | 25 min |
| Mar 12, 6:34 PM MST | Severe Thunderstorm Warning | LUB | Crosby, Garza | 26 min |
| Mar 12, 6:42 PM MST | Severe Thunderstorm Warning | LUB | Cottle, Dickens, King, Motley | 78 min |
| Mar 12, 6:47 PM MST | Tornado Warning | LUB | Cottle, Dickens, King, Motley | 28 min |
| Mar 12, 6:58 PM MST | Severe Thunderstorm Warning | LUB | Crosby, Garza | 46 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, 9.4 hours before the alert went out and 106 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
- 66 J/kg
- Mixed-layer CIN
- -163 J/kg
- Mixed-layer LCL
- 619 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 345 m²/s²
- 0-3 km storm-relative helicity
- 390 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
060
WWUS20 KWNS 122120
SEL7
SPC WW 122120
NMZ000-TXZ000-130300-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 17
NWS Storm Prediction Center Norman OK
320 PM CST Fri Mar 12 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Far east-central New Mexico
Northwest Texas
* Effective this Friday afternoon and evening from 320 PM until
900 PM CST.
* Primary threats include...
A couple tornadoes possible
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible
Isolated significant damaging wind gusts to 75 mph possible
SUMMARY...Multiple supercells are expected to develop through this
evening, initially across east-central New Mexico before spreading
into northwest Texas. Scattered large hail, a couple tornadoes, and
isolated severe wind gusts are possible.
The tornado watch area is approximately along and 95 statute miles
east and west of a line from 70 miles north northwest of Plainview
TX to 45 miles south southeast of Lubbock TX. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU7).
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 65 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 24035.
...GramsSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 4:58 PM MST | Mesoscale Discussion | SPC | Curry, Roosevelt | 2 hr |
| Mar 12, 12:48 PM MST | Mesoscale Discussion | SPC | Armstrong, Briscoe, Castro, Childress, Collingsworth, Cottle and 15 more | 117 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.