Alert archive / Texas / Tornado Watches in 2020
Tornado Watch 402
The Storm Prediction Center issued this tornado watch at Jul 25, 2020, 11:05 PM CDT for 12 counties in Texas. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 25, 2020, 11:05 PM CDT (04:05 UTC)
- Expired
- Jul 26, 2020, 7:55 AM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Strongest gust expected
- 60 kt
Counties Brooks County, TX, Cameron County, TX, Duval County, TX, Hidalgo County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, Live Oak County, TX, McMullen County, TX, Nueces County, TX, San Patricio County, TX, Willacy County, TX
The radar
The Corpus Christi radar (KCRP), 48 km from the middle of the area, began a volume at 04:08 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
- 5%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 20%
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 |
|---|---|---|---|---|
| Jul 25, 11:55 PM CDT | Tornado Warning | CRP | Duval, Jim Wells, Live Oak, McMullen | 35 min |
| Jul 26, 12:30 AM CDT | Flash Flood Warning | BRO | Hidalgo | 5 hr |
| Jul 26, 1:41 AM CDT | Flash Flood Warning | BRO | Hidalgo | 2 hr |
| Jul 26, 2:14 AM CDT | Flash Flood Warning | BRO | Cameron | 8 hr |
| Jul 26, 3:13 AM CDT | Flash Flood Warning | BRO | Cameron, Hidalgo, Willacy | 7 hr |
| Jul 26, 3:24 AM CDT | Flash Flood Warning | BRO | Cameron, Kenedy, Willacy | 7 hr |
| Jul 26, 3:27 AM CDT | Tornado Warning | BRO | Cameron | 33 min |
| Jul 26, 4:00 AM CDT | Tornado Warning | BRO | Cameron, Willacy | 30 min |
| Jul 26, 4:07 AM CDT | Tornado Warning | BRO | Cameron, Willacy | 23 min |
| Jul 26, 4:17 AM CDT | Flash Flood Warning | BRO | Hidalgo, Starr | 6 hr |
| Jul 26, 5:48 AM CDT | Flash Flood Warning | BRO | Hidalgo | 13 hr |
| Jul 26, 6:00 AM CDT | Flash Flood Warning | BRO | Cameron, Hidalgo, Willacy | 5 hr |
| Jul 26, 6:41 AM CDT | Flash Flood Warning | BRO | Hidalgo | 4 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 4.1 hours before the alert went out and 45 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
- 573 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 576 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.7
The text
As transmitted.
254 WWUS20 KWNS 260403 SEL2 SPC WW 260403 TXZ000-CWZ000-261400- URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 402 NWS Storm Prediction Center Norman OK 1105 PM CDT Sat Jul 25 2020 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of South Texas Coastal Waters * Effective this Saturday night and Sunday morning from 1105 PM until 900 AM CDT. * Primary threats include... A couple tornadoes possible SUMMARY...Hanna will continue to move west-southwestward across Deep South Texas through the early morning hours of Sunday. Strong shear on its northern and eastern periphery will account for some tornado potential through the early morning hours of Sunday. The tornado watch area is approximately along and 50 statute miles east and west of a line from 40 miles north northwest of Corpus Christi TX to 45 miles east southeast of Mcallen TX. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). 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 401... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 0 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 11040. ...Guyer
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 7:23 PM CDT | Mesoscale Discussion | SPC | Cameron, Kenedy, Kleberg, Nueces, Willacy | 5 hr |
| Jul 26, 3:23 AM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Wells, Kenedy and 6 more | 2 hr |
| Jul 26, 6:45 AM CDT | Mesoscale Discussion | SPC | Aransas, Brooks, Cameron, Duval, Hidalgo, Jim Wells and 5 more | 90 min |
| Jul 26, 7:51 AM CDT | Tornado Watch | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 8 more | 14 hr |
| Jul 26, 12:13 PM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 5 more | 2 hr |
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.