Alert archive / Texas / Tornado Watches in 2021
Tornado Watch 47
The Storm Prediction Center issued this tornado watch at Mar 24, 2021, 4:38 PM CDT for 27 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 24, 2021, 4:38 PM CDT (21:38 UTC)
- Expired
- Mar 24, 2021, 10:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 27 counties
Bell County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Comanche County, TX, Coryell County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, Kaufman County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Mills County, TX, Navarro County, TX, San Saba County, TX, Somervell County, TX, Van Zandt County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 95 km from the middle of the area, began a volume at 21:39 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
- 30%
- One or more EF2 to EF5 tornadoes
- 10%
- 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
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 4:41 PM CDT | Severe Thunderstorm Warning | FWD | Mills | 64 min |
| Mar 24, 4:41 PM CDT | Tornado Warning | SJT | San Saba | 34 min |
| Mar 24, 5:30 PM CDT | Severe Thunderstorm Warning | FWD | Henderson, Kaufman, Van Zandt | 60 min |
| Mar 24, 5:39 PM CDT | Severe Thunderstorm Warning | FWD | Dallas, Hunt, Kaufman, Rockwall | 66 min |
| Mar 24, 5:43 PM CDT | Severe Thunderstorm Warning | FWD | Coryell, Hamilton, Mills | 62 min |
| Mar 24, 5:45 PM CDT | Tornado Warning | FWD | Coryell, Hamilton, Lampasas, Mills | 45 min |
| Mar 24, 6:26 PM CDT | Severe Thunderstorm Warning | FWD | Bosque, Hamilton | 64 min |
| Mar 24, 6:29 PM CDT | Tornado Warning | FWD | Van Zandt | 31 min |
| Mar 24, 7:08 PM CDT | Tornado Warning | FWD | Bosque, Hamilton | 52 min |
| Mar 24, 7:09 PM CDT | Severe Thunderstorm Warning | SJT | Brown | 51 min |
| Mar 24, 7:33 PM CDT | Severe Thunderstorm Warning | FWD | Comanche | 57 min |
| Mar 24, 7:47 PM CDT | Severe Thunderstorm Warning | FWD | Bosque, Hill | 58 min |
| Mar 24, 7:55 PM CDT | Tornado Warning | FWD | Bosque, Hill | 50 min |
| Mar 24, 8:39 PM CDT | Severe Thunderstorm Warning | FWD | Ellis, Hill, Johnson | 66 min |
| Mar 24, 9:40 PM CDT | Severe Thunderstorm Warning | FWD | Ellis | 65 min |
| Mar 24, 9:51 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, McCulloch, Mason, Menard | 54 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, 9.6 hours before the alert went out and 123 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1705 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 362 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
895
WWUS20 KWNS 242136
SEL7
SPC WW 242136
TXZ000-250300-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 47
NWS Storm Prediction Center Norman OK
440 PM CDT Wed Mar 24 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Central to northeast Texas
* Effective this Wednesday afternoon and evening from 440 PM
until 1000 PM CDT.
* Primary threats include...
A couple tornadoes possible
Scattered large hail and isolated very large hail events to 3
inches in diameter likely
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Multiple discrete supercells are expected, initially
across central Texas where the relatively greatest threat should
exist for very large hail and a couple tornadoes.
The tornado watch area is approximately along and 50 statute miles
north and south of a line from 50 miles northeast of Corsicana TX to
70 miles south southwest of Brownwood 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 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24030.
...GramsSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 3:22 PM CDT | Mesoscale Discussion | SPC | Anderson, Bell, Bosque, Brown, Burnet, Comanche and 32 more | 2 hr |
| Mar 24, 4:59 PM CDT | Severe Thunderstorm Watch | SPC | Camp, Collin, Cooke, Dallas, Delta, Denton and 18 more | 5 hr |
| Mar 24, 6:10 PM CDT | Mesoscale Discussion | SPC | Bell, Bosque, Brown, Burnet, Comanche, Concho and 31 more | 65 min |
Nearby
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.