The National Weather Service in New Braunfels have confirmed six tornadoes impacted portions of South-Central and Central Texas during the late evening hours on February 19th. These tornadoes were not produced by supercellular processes, but by embedded circulations in a squall line. Many times these QLCS tornadoes are very weak and brief, embedded within a larger area of damaging straight-line winds. This post will be updated as needed with supplemental information.

…NWS DAMAGE SURVEY FOR 02/19/17 TORNADO EVENTS IN BEXAR/COMAL COUNTIES…

.OVERVIEW…STORM SURVEYS WERE CONDUCTED BY NWS METEOROLOGISTS ACROSS
PORTIONS OF BEXAR AND COMAL COUNTIES. THESE REPORTS SHOULD STILL BE
CONSIDERED PRELIMINARY AND SOME ADJUSTMENTS MAY STILL BE MADE TO THE
TORNADO PATHS AND STRENGTHS OVER THE COMING DAYS. OTHER DAMAGE SURVEYS
WILL CONTINUE OVER THE COMING DAYS ACROSS OTHER AREAS OF SOUTH CENTRAL
TEXAS.

.Ridgeview/Alamo Heights Tornado…

Rating: EF-2
Estimated Peak Wind: 120 mph
Path Length /Statute/: 4.6 Miles
Path Width /Maximum/: 600 Yards
Fatalities: 0
Injuries: Unknown

Start Date: Feb 19 2017
Start Time: 1036 PM CST
Start Location: 5 N San Antonio / Bexar County / TX
Start Lat/Lon: 29.4907 / -98.4991

End Date: Feb 19 2017
End Time: 1043 PM CST
End Location: 3 NNE Terrell Hills / Bexar County / TX
End Lat/Lon: 29.5154 / -98.4273

Survey Summary: A tornado formed near San Pedro Avenue at the San Pedro
Golf course and moved northeast while strengthening to an EF-1 near
Jackson-Keller Road. As it got to Linda Drive is strengthened and the damage
path was its widest at near 600 yards. The tornado took a bit of a right
turn and moved due east along Linda and Sharon Drives where it had peak winds
of near 120 mph making it an EF-2 Tornado. A few homes in this area had their
roofs completely removed. The tornado crossed Highway 281 near the Alamo
Quary Market shopping center as an EF-1 and continued on and East-Northeast
track through Alamo Heights. Along its path numerous homes had roof damage
and major tree damage with large oak trees snapped and uprooted. The rest
of the track was mainly EF-0 wind speeds but with a few smaller pockets of
EF-1 damage. The tornado crossed near the Nacogdoches/New Braunfels Ave.
intersection, moved east-northeast, crossing Harry Wurzbach and finally
dissipating near the Loop 410/Salado Creek area.

.Northern Hills Tornado…

Rating: EF-1
Estimated Peak Wind: 105 mph
Path Length /Statute/: 1.5 Miles
Path Width /Maximum/: 200 Yards
Fatalities: 0
Injuries: Unknown

Start Date: Feb 19 2017
Start Time: 1043 PM CST
Start Location: 3 NW of Windcrest / Bexar County / TX
Start Lat/Lon: 29.5551 / -98.4117

End Date: Feb 19 2017
End Time: 1046 PM CST
End Location: 5 WNW of Universal City / Bexar County / TX
End Lat/Lon: 29.5697 / -98.3941

Survey Summary: A tornado formed just northeast of Thousand Oaks
Drive along Scarsdale Drive. The tornado moved to the northeast
through a residential neighborhood between FM 2252 and Stahl Road.
The tornado produced widespread EF0 damage and pockets of EF1 damage
to homes and trees. Some single family homes lost sections of their
roofs. There was also significant damage to large utility
structures. The tornado lifted as it crossed Higgins Road.

.Glen Heights Tornado…

Rating: EF-0
Estimated Peak Wind: 80 mph
Path Length /Statute/: 1.6 Miles
Path Width /Maximum/: 100 Yards
Fatalities: 0
Injuries: Unknown

Start Date: Feb 19 2017
Start Time: 1042 PM CST
Start Location: 5 SW of Universal City / Bexar County / TX
Start Lat/Lon: 29.5016 / -98.3601

End Date: Feb 19 2017
End Time: 1045 PM CST
End Location: 3 SW of Universal City / Bexar County / TX
End Lat/Lon: 29.5219 / -98.3469

Survey Summary: A tornado formed near the intersection of Walzem
Road and New World Drive. This tornado produced EF0 damage as it
traveled to the northeast before lifting near the intersection of
Crestway Road and Oconnor Road. There was primarily damage to trees
and minor damage to roofs and carports.

.Schoenthal Ranch Tornado…

Rating: EF-0
Estimated Peak Wind: 85 mph
Path Length /Statute/: 0.7 miles
Path Width /Maximum/: 100 Yards
Fatalities: 0
Injuries: Unknown

Start Date: Feb 19 2017
Start Time: 1100 PM CST
Start Location: 3 NE of Garden Ridge / Comal County / TX
Start Lat/Lon: 29.6714 / -98.2650

End Date: Feb 19 2017
End Time: 1102 PM CST
End Location: 4 NE of Garden Ridge / Comal County / TX
End Lat/Lon: 29.6786 / -98.2581

Survey Summary: A tornado initially occurred at the end of Dedeke
Drive near the Dry Comal Creek. This tornado primarily produced
minor tree damage as it traveled northeast before lifting northeast
of Tonne Drive East.

Survey Summary: Pending

EF Scale: The enhanced fujita scale classifies
tornadoes into the following categories.

EF0…Weak……65 TO 85 mph
EF1…Weak……86 TO 110 mph
EF2…Strong….111 TO 135 mph
EF3…Strong….136 TO 165 mph
EF4…Violent…166 TO 200 mph
EF5…Violent…>200 mph

National Weather Service Austin/San Antonio TX
230 PM CST Tue Feb 21 2017

…NWS DAMAGE SURVEY FOR 02/19/2017 TORNADO EVENT IN GUADALUPE
COUNTY…

.Seguin Tornado…

Rating: EF-0
Estimated Peak Wind: 85 mph
Path Length /Statute/: 0.23 Miles
Path Width /Maximum/: 75 Yards
Fatalities: 0
Injuries: 0

Start Date: Feb 19 2017
Start Time: 1116 PM CST
Start Location: 7 S Seguin / Guadalupe County / TX
Start Lat/Lon: 29.4605 / -97.9487

End Date: Feb 19 2017
End Time: 1118 PM CST
End Location: 7 S Seguin / Guadalupe County / TX
End Lat/Lon: 29.4626 / -97.9458

Survey_Summary: This short-lived tornado occurred about 7 miles
south of Seguin along Highway 123. This tornado caused several
recreational vehicles to overturn, and caused damage to several
sheds and outbuildings.

…NWS DAMAGE SURVEY FOR 02/19/2017 TORNADO EVENT IN HAYS
COUNTY…

.OVERVIEW…STORM SURVEYS WERE CONDUCTED BY NWS METEOROLOGISTS
ACROSS HAYS COUNTY…PRIMARILY ALONG RANCH ROAD 12 AND NEW RANCH
ROAD 12 ACROSS NORTHWESTERN AND NORTHERN SAN MARCOS AND INTO WESTERN
KYLE. THESE REPORTS SHOULD STILL BE CONSIDERED PRELIMINARY AND SOME
ADJUSTMENTS MAY BE MADE TO THE TORNADO PATHS AND STRENGTHS OVER THE
COMING DAYS.

.SAN MARCOS/KYLE TORNADO…

Rating: EF-1
Estimated Peak Wind: 100 mph
Path Length /Statute/: 9.75 Miles
Path Width /Maximum/: 300 Yards
Fatalities: 0
Injuries: 0

Start Date: Feb 19 2017
Start Time: 1126 PM CST
Start Location: 7 NW San Marcos / Hays County / TX
Start Lat/Lon: 29.9156 / -98.0480

End Date: Feb 19 2017
End Time: 1135 PM CST
End Location: 2 SW Kyle / Hays County / TX
End Lat/Lon: 29.9636 / -97.8986

Survey_Summary: The survey team concluded that a tornado began at
the intersection of Ranch Road 12 and Hugo Road where some trees
were noted as snapped and a small business had considerable
structural damage. The tornado traveled northeast and likely
traversed a large area of land that was unaccessible until reaching
Hilliard Road and a neighborhood along Thousand Oaks Loop where a
wide area of considerable tree damage, including a tree uprooted and
fallen onto a vehicle, was found. The tornado path crossed the
Blanco River before ending near the Kyle Cemetery on Old Stagecoach
Road. At this point, damage became much less significant and
sporadic moving east toward I-35.

.NIEDERWALD/MUSTANG RIDGE TORNADO…

Rating: EF-0
Estimated Peak Wind: 85 mph
Path Length /Statute/: 3 Miles
Path Width /Maximum/: 100 Yards
Fatalities: 0
Injuries: 0

Start Date: Feb 19 2017
Start Time: 1148 PM CST
Start Location: 2 NW Niederwald / Hays County / TX
Start Lat/Lon: 30.0361 / -97.7415

End Date: Feb 19 2017
End Time: 1151 PM CST
End Location: 1 NW Mustang Ridge / Travis County / TX
End Lat/Lon: 30.0613 / -97.7046

Survey_Summary: The survey team concluded that many damage areas across
central Hays county were due to straight line winds, but a new tornado
indeed developed northwest of Niederwald. Damage in this area included
a destroyed aluminum barn structure, car port damage, and a few trees
with large limbs snapped. As the tornado moved northeast into the Mustang
Ridge area, multiple mobile homes had significant roof damage consistent
with EF-0 speeds. The tornado likely lifted as it approached SH 130 as
damage east of SH 130 was found to be caused by straight line winds.

…NWS DAMAGE SURVEY FOR 02/20/17 TORNADO EVENTS IN EASTERN WILLIAMSON COUNTY…

.OVERVIEW…STORM SURVEYS WERE CONDUCTED BY NWS METEOROLOGISTS ACROSS EASTERN
WILLIAMSON COUNTY…PRIMARILY IN AREAS SOUTH OF U.S. HIGHWAY 79 FROM SOUTH OF
TAYLOR TO THRALL…AND JUST NORTH/NORTHEAST OF THRALL. THESE REPORTS SHOULD
STILL BE CONSIDERED PRELIMINARY AND SOME ADJUSTMENTS MAY BE MADE TO THE TORNADO
PATHS AND STRENGTHS OVER THE COMING DAYS. OTHER DAMAGE SURVEYS WILL CONTINUE
ACROSS SOUTH CENTRAL TEXAS IN THE NEXT FEW DAYS.

.THRALL TORNADO…

Rating: EF-2
Estimated Peak Wind: 118 mph
Path Length /Statute/: 9.4 Miles
Path Width /Maximum/: 200 Yards
Fatalities: 0
Injuries: 0

Start Date: Feb 20 2017
Start Time: 1225 AM CST
Start Location: 5 WSW Thrall / Williamson County / TX
Start Lat/Lon: 30.5501 / -97.3594

End Date: Feb 20 2017
End Time: 1233 AM CST
End Location: 4 ENE Thrall / Williamson County / TX
End Lat/Lon: 30.6312 / -97.2436

Survey_Summary: This tornado was the northern one of a pair on near parallel
tracks a few miles south of U.S. Highway 79. Damage was sporadic…but
concentrated when it occurred. The most significant damage was to a metal
building system home…at least five other single family homes…and 12
railroad cars blown off the tracks east of Thrall. The train cars may have
also been affected by strong straight-line winds.

.NOACK TORNADO…

Rating: EF-2
Estimated Peak Wind: 112 mph
Path Length /Statute/: 9.54 Miles
Path Width /Maximum/: 100 Yards
Fatalities: 0
Injuries: 0

Start Date: Feb 20 2017
Start Time: 1228 AM CST
Start Location: 5 SW Thrall / Williamson County / TX
Start Lat/Lon: 30.5443 / -97.3525

End Date: Feb 20 2017
End Time: 1231 AM CST
End Location: Thrall / Williamson County / TX
End Lat/Lon: 30.6816 / -97.2429

Survey_Summary: This tornado was the southern one of a pair on near parallel
tracks a few miles south of U.S. Highway 79. Damage was sporadic…but
concentrated when it occurred. The most significant damage was to a 3-bin grain
storage facility…where the bins were completely destroyed and swept from their
foundations. Additional damage occurred to an extension of Christ Lutheran
Church of Noack on FM 112…where the walls were bolted to the foundation.

EF Scale: The enhanced fujita scale classifies
tornadoes into the following categories.

EF0…Weak……65 TO 85 mph
EF1…Weak……86 TO 110 mph
EF2…Strong….111 TO 135 mph
EF3…Strong….136 TO 165 mph
EF4…Violent…166 TO 200 mph
EF5…Violent…>200 mph

…NWS DAMAGE SURVEY FOR 02/20/2017 THUNDERSTORM WIND EVENT IN EASTERN
WILLIAMSON COUNTY…

.OVERVIEW…STORM SURVEYS WERE CONDUCTED BY NWS METEOROLOGISTS ACROSS EASTERN
WILLIAMSON COUNTY IN THE AREA NORTH OF U.S. HIGHWAY 79 FROM NORTHWEST TO
NORTH OF THRALL. THESE REPORTS SHOULD STILL BE CONSIDERED PRELIMINARY
AND SOME ADJUSTMENTS MAY STILL BE MADE TO THE WIND DAMAGE PATH AND STRENGTHS
OVER THE COMING DAYS. OTHER DAMAGE SURVEYS WILL CONTINUE OVER THE NEXT FEW
DAYS ACROSS SOUTH CENTRAL TEXAS.

.THUNDERSTORM WIND…

Peak Wind /E/: 118-138 mph
Path Length /Statute/: 2 Miles
Path Width /Maximum/: 500 Yards
Fatalities: 0
Injuries: 2

Start Date: Feb 20 2017
Start Time: 1228 AM CST
Start Location: 2 NW Thrall / Williamson County / TX
Start Lat/Lon: 30.6082 / -97.1330

End Date: Feb 20 2017
End Time: 1233 AM CST
End Location: 2 N Thrall / Williamson County / TX
End Lat/Lon: 30.6137 / -97.3012

Survey_Summary: While there was a strong circulation near the start of the
path…all of the damage observed was indicative of straight-line winds…
with debris strewn toward the east-northeast. At least 10 homes were
significantly damaged…and at least two dozen farm outbuildings…
mobile homes…and RVs were severely damaged or destroyed. The most
significant damage was along CR 420…where three RVs were rolled and
through 2-3 cycles and destroyed. A couple suffered minor injuries in one
of the RVs. In addition…a metal-building-system building was destroyed.
The metal plates of the main beam supports were bolted with nuts or J-bolts
into the concrete foundation…but were sheared or bent…and then torn away.
The entire roof and walls lofted and set down about 25 yards from the
foundation…but were severely bent and twisted.