Alert archive / Texas / Tornado Watches in 2020
Tornado Watch 3
The Storm Prediction Center issued this tornado watch at Jan 10, 2020, 1:20 PM CST for 39 counties in Texas. It was in force for 11 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 10, 2020, 1:20 PM CST (19:20 UTC)
- Expired
- Jan 11, 2020, 12:00 AM CST
- In force
- 11 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 39 counties
Anderson County, TX, Bell County, TX, Bosque County, TX, Collin County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fannin County, TX, Freestone County, TX, Grayson County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Montague County, TX, Navarro County, TX, Parker County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 86 km from the middle of the area, began a volume at 19:23 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
- 70%
- One or more EF2 to EF5 tornadoes
- 50%
- Ten or more severe wind reports
- 90%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 80%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
25 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 10, 2:28 PM CST | Tornado Warning | FWD | Cooke | 27 min |
| Jan 10, 2:36 PM CST | Severe Thunderstorm Warning | FWD | Parker, Wise | 54 min |
| Jan 10, 2:45 PM CST | Tornado Warning | FWD | Wise | 45 min |
| Jan 10, 3:05 PM CST | Severe Thunderstorm Warning | FWD | Parker | 25 min |
| Jan 10, 3:16 PM CST | Flash Flood Warning | FWD | Cooke | 6 hr |
| Jan 10, 3:26 PM CST | Severe Thunderstorm Warning | FWD | Denton, Parker, Wise | 64 min |
| Jan 10, 3:33 PM CST | Tornado Warning | FWD | Cooke | 42 min |
| Jan 10, 3:48 PM CST | Severe Thunderstorm Warning | FWD | Comanche, Hamilton | 57 min |
| Jan 10, 3:58 PM CST | Flash Flood Warning | FWD | Denton, Wise | 3 hr |
| Jan 10, 4:06 PM CST | Severe Thunderstorm Warning | FWD | Hamilton, Lampasas, Mills | 54 min |
| Jan 10, 4:11 PM CST | Severe Thunderstorm Warning | FWD | Cooke, Grayson | 38 min |
| Jan 10, 4:23 PM CST | Tornado Warning | FWD | Ellis, Henderson, Kaufman, Navarro | 31 min |
| Jan 10, 4:24 PM CST | Tornado Warning | FWD | Bosque, Erath, Hamilton, Somervell | 37 min |
| Jan 10, 4:45 PM CST | Severe Thunderstorm Warning | FWD | Coryell, Hamilton, Lampasas, Mills | 60 min |
| Jan 10, 4:53 PM CST | Tornado Warning | FWD | Hood | 14 min |
| Jan 10, 5:21 PM CST | Severe Thunderstorm Warning | FWD | Bosque, Hill, Johnson | 54 min |
| Jan 10, 5:35 PM CST | Severe Thunderstorm Warning | FWD | Coryell, Lampasas | 55 min |
| Jan 10, 5:38 PM CST | Severe Thunderstorm Warning | FWD | Bosque, Coryell, Hamilton | 67 min |
| Jan 10, 5:42 PM CST | Tornado Warning | FWD | Johnson, Tarrant | 33 min |
| Jan 10, 6:04 PM CST | Severe Thunderstorm Warning | FWD | Coryell, Lampasas | 41 min |
| Jan 10, 6:04 PM CST | Tornado Warning | FWD | Delta, Hopkins, Lamar | 26 min |
| Jan 10, 6:09 PM CST | Tornado Warning | FWD | Dallas, Tarrant | 24 min |
| Jan 10, 6:44 PM CST | Severe Thunderstorm Warning | FWD | Coryell, McLennan | 36 min |
| Jan 10, 6:46 PM CST | Tornado Warning | FWD | Collin, Dallas, Denton | 14 min |
| Jan 10, 7:40 PM CST | Severe Thunderstorm Warning | FWD | Ellis, Hill | 23 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, 7.3 hours before the alert went out and 83 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
- 844 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 727 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 305 m²/s²
- 0-3 km storm-relative helicity
- 327 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 10.6
The text
As transmitted.
276
WWUS20 KWNS 101915
SEL3
SPC WW 101915
TXZ000-110300-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 3
NWS Storm Prediction Center Norman OK
115 PM CST Fri Jan 10 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
North Central Texas
* Effective this Friday afternoon and evening from 115 PM until
900 PM CST.
* Primary threats include...
A few tornadoes likely with a couple intense tornadoes possible
Widespread large hail and scattered very large hail events to 2
inches in diameter likely
Widespread damaging wind gusts to 70 mph likely
SUMMARY...Thunderstorms will rapidly develop this afternoon and
affect the watch area through the evening. The strongest cells will
be capable of damaging wind gusts, large hail, and a few tornadoes.
Strong tornadoes are possible.
The tornado watch area is approximately along and 70 statute miles
east and west of a line from 5 miles northeast of Durant OK to 25
miles southeast of Temple TX. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU3).
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 1...WW 2...
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 500. Mean
storm motion vector 24035.
...HartSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 10, 6:30 AM CST | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 13 more | 60 min |
| Jan 10, 7:44 AM CST | Severe Thunderstorm Watch | SPC | Alfalfa, Blaine, Custer, Dewey, Garfield, Grant and 12 more | 67 days |
| Jan 10, 9:12 AM CST | Mesoscale Discussion | SPC | Alfalfa, Atoka, Blaine, Caddo, Canadian, Cherokee and 42 more | 93 min |
| Jan 10, 10:42 AM CST | Tornado Watch | SPC | Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 38 more | 10 hr |
| Jan 10, 11:47 AM CST | Mesoscale Discussion | SPC | Bryan, Choctaw | 118 min |
| Jan 10, 1:21 PM CST | Mesoscale Discussion | SPC | Caddo, Canadian, Comanche, Garfield, Grady, Grant and 2 more | 54 min |
| Jan 10, 1:44 PM CST | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 19 more | 91 min |
| Jan 10, 4:55 PM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Haskell, Latimer, LeFlore and 2 more | 2 hr |
| Jan 10, 5:34 PM CST | Tornado Watch | SPC | McCurtain | 11 hr |
| Jan 10, 2:52 PM CST | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 17 more | 113 min |
| Jan 10, 2:59 PM CST | Mesoscale Discussion | SPC | Bosque, Collin, Dallas, Delta, Denton, Ellis and 13 more | 2 hr |
| Jan 10, 3:30 PM CST | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bastrop, Bee, Bexar, Blanco and 26 more | 68 days |
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.