Alert archive / Texas / Tornado Watches in 2020
Tornado Watch 55
The Storm Prediction Center issued this tornado watch at Mar 18, 2020, 11:37 PM CDT for 40 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 18, 2020, 11:37 PM CDT (04:37 UTC)
- Expired
- Mar 19, 2020, 5:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 40 counties
Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Crockett County, TX, Eastland County, TX, Edwards County, TX, Fisher County, TX, Gillespie County, TX, Haskell County, TX, Irion County, TX, Jack County, TX, Jones County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, Nolan County, TX, Palo Pinto County, TX, Real County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Uvalde County, TX, Val Verde County, TX, Wise County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 87 km from the middle of the area, began a volume at 04:40 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
- 60%
- One or more EF2 to EF5 tornadoes
- 40%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- 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
- 90%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 11:54 PM CDT | Tornado Warning | SJT | Coke, Sterling | 34 min |
| Mar 19, 12:22 AM CDT | Tornado Warning | SJT | Nolan | 38 min |
| Mar 19, 12:56 AM CDT | Tornado Warning | SJT | Nolan, Taylor | 34 min |
| Mar 19, 1:17 AM CDT | Tornado Warning | SJT | Callahan, Jones, Shackelford, Taylor | 43 min |
| Mar 19, 1:49 AM CDT | Tornado Warning | SJT | Shackelford, Throckmorton | 41 min |
| Mar 19, 2:01 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 44 min |
| Mar 19, 2:27 AM CDT | Tornado Warning | SJT | Shackelford | 18 min |
| Mar 19, 2:29 AM CDT | Severe Thunderstorm Warning | FWD | Stephens, Young | 61 min |
| Mar 19, 2:32 AM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kinney, Val Verde | 58 min |
| Mar 19, 2:32 AM CDT | Tornado Warning | FWD | Stephens | 28 min |
| Mar 19, 2:54 AM CDT | Tornado Warning | FWD | Stephens, Young | 36 min |
| Mar 19, 3:13 AM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kerr, Real | 62 min |
| Mar 19, 3:17 AM CDT | Tornado Warning | FWD | Jack, Young | 43 min |
| Mar 19, 4:13 AM CDT | Severe Thunderstorm Warning | EWX | Gillespie, Kerr | 62 min |
| Mar 19, 4:18 AM CDT | Severe Thunderstorm Warning | SJT | Kimble | 20 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 00:00Z, 4.6 hours before the alert went out and 242 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
- 1265 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 888 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 237 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 11.8
The text
As transmitted.
564
WWUS20 KWNS 190434
SEL5
SPC WW 190434
TXZ000-191000-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 55
NWS Storm Prediction Center Norman OK
1140 PM CDT Wed Mar 18 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
West Central Texas
* Effective this Wednesday night and Thursday morning from 1140
PM until 500 AM CDT.
* Primary threats include...
A few tornadoes likely with a couple intense tornadoes possible
Scattered damaging wind gusts to 70 mph likely
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
SUMMARY...A cluster of intense thunderstorms will spread across the
watch area overnight, with large hail and damaging winds possible.
A few of the storms may also pose a risk of a tornado or two.
The tornado watch area is approximately along and 85 statute miles
east and west of a line from 50 miles north of Abilene TX to 55
miles south southwest of Junction TX. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU5).
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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 54...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 24035.
...HartSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 8:45 PM CDT | Mesoscale Discussion | SPC | Bandera, Coke, Concho, Crockett, Edwards, Irion and 18 more | 60 min |
| Mar 18, 9:34 PM CDT | Mesoscale Discussion | SPC | Cooke, Grayson, Wise | 56 min |
| Mar 19, 1:28 AM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coke, Coleman, Comanche, Concho and 23 more | 2 hr |
| Mar 19, 2:08 AM CDT | Mesoscale Discussion | SPC | Shackelford, Stephens | 67 min |
| Mar 19, 3:33 AM CDT | Mesoscale Discussion | SPC | Bandera, Brown, Callahan, Coleman, Comanche, Concho and 24 more | 117 min |
| Mar 19, 1:58 PM CDT | Mesoscale Discussion | SPC | Bosque, Bowie, Camp, Collin, Dallas, Delta and 26 more | 62 min |
| Mar 19, 2:24 PM CDT | Tornado Watch | SPC | Bowie, Camp, Cass, Collin, Delta, Fannin and 18 more | 8 hr |
| Mar 19, 6:51 PM CDT | Mesoscale Discussion | SPC | Bell, Bosque, Coryell, Falls, Freestone, Hamilton and 9 more | 54 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.