Alert archive / Texas / Tornado Watches in 2015
Tornado Watch 169
The Storm Prediction Center issued this tornado watch at May 13, 2015, 9:52 AM CDT for 33 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- May 13, 2015, 9:52 AM CDT (14:52 UTC)
- Expired
- May 13, 2015, 6:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 33 counties
Atascosa County, TX, Bastrop County, TX, Bee County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Duval County, TX, Fayette County, TX, Frio County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Jim Wells County, TX, Karnes County, TX, Kendall County, TX, La Salle County, TX, Lavaca County, TX, Lee County, TX, Live Oak County, TX, McMullen County, TX, Medina County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Travis County, TX, Victoria County, TX, Webb County, TX, Williamson County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 96 km from the middle of the area, began a volume at 14:55 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
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 9:53 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar, Frio, Medina | 52 min |
| May 13, 9:56 AM CDT | Tornado Warning | CRP | Jim Wells, Live Oak, San Patricio | 21 min |
| May 13, 10:04 AM CDT | Flash Flood Warning | CRP | Duval, McMullen | 116 min |
| May 13, 10:32 AM CDT | Tornado Warning | EWX | Blanco, Hays | 28 min |
| May 13, 11:08 AM CDT | Severe Thunderstorm Warning | CRP | Duval, McMullen | 37 min |
| May 13, 11:13 AM CDT | Tornado Warning | CRP | Duval | 32 min |
| May 13, 11:43 AM CDT | Tornado Warning | CRP | Duval | 32 min |
| May 13, 12:02 PM CDT | Flash Flood Warning | CRP | Duval, Live Oak, McMullen | 118 min |
| May 13, 12:21 PM CDT | Flash Flood Warning | EWX | Bastrop, Lee | 6 hr |
| May 13, 1:08 PM CDT | Flash Flood Warning | CRP | McMullen | 82 min |
| May 13, 1:16 PM CDT | Flash Flood Warning | EWX | Atascosa, Karnes, Wilson | 4 hr |
| May 13, 1:51 PM CDT | Flash Flood Warning | CRP | Live Oak | 114 min |
| May 13, 1:54 PM CDT | Tornado Warning | CRP | Duval | 36 min |
| May 13, 2:00 PM CDT | Flash Flood Warning | CRP | Duval, McMullen | 90 min |
| May 13, 2:23 PM CDT | Tornado Warning | CRP | McMullen | 22 min |
| May 13, 2:30 PM CDT | Flash Flood Warning | CRP | McMullen | 60 min |
| May 13, 3:19 PM CDT | Tornado Warning | CRP | Goliad | 26 min |
| May 13, 3:25 PM CDT | Flash Flood Warning | CRP | Goliad | 95 min |
| May 13, 3:56 PM CDT | Tornado Warning | CRP | La Salle, Webb | 34 min |
| May 13, 4:10 PM CDT | Tornado Warning | CRP | Victoria | 35 min |
| May 13, 4:30 PM CDT | Severe Thunderstorm Warning | CRP | La Salle, Webb | 45 min |
| May 13, 5:11 PM CDT | Severe Thunderstorm Warning | CRP | Webb | 49 min |
| May 13, 5:50 PM CDT | Severe Thunderstorm Warning | CRP | Webb | 40 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
Corpus Christi, TX (KCRP), launched 12:00Z, 2.9 hours before the alert went out and 156 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
- 187 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 798 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
494 WWUS20 KWNS 131450 SEL9 SPC WW 131450 TXZ000-CWZ000-132200- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 169 NWS STORM PREDICTION CENTER NORMAN OK 950 AM CDT WED MAY 13 2015 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF SOUTH TEXAS COASTAL WATERS * EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 950 AM UNTIL 500 PM CDT. * PRIMARY THREATS INCLUDE... A FEW TORNADOES POSSIBLE ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE SUMMARY...WIDELY SCATTERED THUNDERSTORMS WITH A RISK FOR TORNADOES...AND AN EASTWARD-MOVING LINE OF STORMS WEST WITH A RISK OF LOCALLY DAMAGING WIND AND BRIEF TORNADOES...WILL AFFECT PARTS OF SOUTH TEXAS THROUGH THE AFTERNOON. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES WEST SOUTHWEST OF ALICE TEXAS TO 30 MILES NORTH OF AUSTIN TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9). 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 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 22025. ...CORFIDI
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 7:34 AM CDT | Mesoscale Discussion | SPC | Bandera, Dimmit, Frio, La Salle, Medina, Real and 2 more | 56 min |
| May 13, 11:43 AM CDT | Mesoscale Discussion | SPC | Bee, Duval, Live Oak | 2 hr |
| May 13, 12:49 PM CDT | Mesoscale Discussion | SPC | Borden, Coke, Concho, Crockett, Dawson, Fisher and 19 more | 2 hr |
| May 13, 2:24 PM CDT | Mesoscale Discussion | SPC | Anderson, Cherokee, Freestone, Grimes, Henderson, Houston and 8 more | 3 hr |
| May 13, 3:09 PM CDT | Severe Thunderstorm Watch | SPC | Coke, Concho, Crockett, Dimmit, Edwards, Irion and 16 more | 7 hr |
| May 13, 3:37 PM CDT | Mesoscale Discussion | SPC | Briscoe, Childress, Collingsworth, Cottle, Dickens, Donley and 9 more | 2 hr |
| May 13, 6:46 PM CDT | Mesoscale Discussion | SPC | Coke, Coleman, Concho, Crockett, Edwards, Irion and 14 more | 89 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.