Storm Survey of the Tornado In San Antonio, Tx on 10/09/2011

 

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A. Cove Harbor
B. Old Theater Road
C. Medina Base Road
D. Flair drive
E. Daytona Drive
F. Aldrich
G. Post Office
H. Parking Lot
I. Valley Hi Drive
J. Construction Site
K. Cedarhurst Drive
L. El Ray Drive
M. Dumont Drive
N. Chadwick Drive
O. Baywell Drive
P. Ashford
Q. Appleton
R. Allenhurst at Springvale 

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PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
245 PM CDT TUE OCT 25 2011

...UPDATE...EF1 TORNADO RATING FOR SAN ANTONIO TORNADO...

* EVENT DATE/TIME.....OCTOBER 9 2011...110 AM
* EVENT LOCATION......1.5 MILES SOUTHWEST OF LACKLAND AFB
TO 1 MILE WEST OF LACKLAND AFB
* EF RATING...........EF1
* BEGINNING LAT/LON...29.366 N / -98.632 W
* ENDING LAT/LON......29.392 N / -98.642 W
* PATH LENGTH.........2 MILES
* MAXIMUM WIDTH.......50 YARDS

UPDATE...THE NWS SURVEY HAS CONCLUDED THAT THE TORNADO REACHED ITS
PEAK INTENSITY AS AN EF1 TORNADO. EVIDENCE SUGGESTS THAT THE
TORNADO WAS ON THE LOW END OF THE EF1 SCALE WITH ESTIMATED PEAK
WINDS OF 90 TO 100 MPH.

---PREVIOUS NOTES----

THE NATIONAL WEATHER SERVICE CONDUCTED A DAMAGE SURVEY ON SUNDAY
OCTOBER 9TH AND MONDAY OCTOBER 10TH. THE TRACK OF THE TORNADO WAS
ADJUSTED SOUTH SLIGHTLY FROM PREVIOUS TRACK ESTIMATES BASED ON
DAMAGE IN THE RIDGESTONE SUBDIVISION WHICH IS LOCATED JUST SOUTH
OF MEDINA BASE ROAD IN SOUTHWEST SAN ANTONIO. THIS ADJUSTMENT
GIVES AN OVERALL TORNADO PATH LENGTH OF 2 MILES. MAXIMUM WIDTH WAS
50 YARDS. ESTIMATES SHOW THE TORNADO FIRST DROPPING DOWN AROUND
110 AM SUNDAY MORNING.

THE FIRST DAMAGE APPEARED IN THE RIDGESTONE SUBDIVISION WITH SEVERAL
HOMES EXPERIENCING ROOF DAMAGE...BLOWN DOWN FENCES...LOST
SHINGLES...AND THROWN OBJECTS SUCH AS TRAMPOLINES. THE TORNADO
THEN MOVED NORTH NORTHWEST AND CROSSED MEDINA BASE ROAD WHERE MORE
ROOF AND FENCE DAMAGE WAS NOTED ALONG HEATHERS COVE. THE TORNADO
TRAVELED JUST TO THE EAST OF LOOP 410 ALONG PARALLEL DRIVE AND
PRODUCED DAMAGE TO TREES...CARPORTS...ROOFS...AND VEHICLES. SOME
OF THE DAMAGE WAS CAUSED BY FLYING DEBRIS.

THE TORNADO CONTINUED NORTH NORTHWEST AND HIT NEAR THE US POST OFFICE
(5510 SW LOOP 410) POSTAL TRUCKS WERE TOSSED FROM THE PARKING LOT
BEHIND THE POST OFFICE. 22 TRUCKS WERE DAMAGE AT THE FACILITY WITH
15 OF THE TRUCKS BEING A TOTAL LOSS. THIS DAMAGE IS AN INDICATOR
OF WHERE THE TORNADO LIKELY REACHED ITS PEAK INTENSITY. THERE WERE
SEVERAL WITNESSES TO THE TORNADO INCLUDING EMPLOYEES AT THE NEARBY
HEB GROCERY STORE...ALONG WITH SAN ANTONIO FIRE DEPARTMENT.

THE TORNADO CROSSED VALLEY HI DRIVE WHERE IT DID SOME DAMAGE TO TWO
OFFICE BUILDINGS ALONG VALLEY HI DRIVE BEFORE MOVING OVER OR VERY
NEAR THE SAM RAYBURN MIDDLE SCHOOL. THE SCHOOL ITSELF SUFFERED
ONLY MINOR ROOF DAMAGE...WITH MORE DAMAGE BEING SEEN BEHIND THE
SCHOOL WHERE A NEW SCHOOL BUILDING IS UNDER CONSTRUCTION. JUST
NORTH OF THE SCHOOL...A HOME LOST A SECTION OF ROOF AT THE CORNER
OF CEDARHURST AND GAGE DRIVES. THE TORNADO APPEARS TO HAVE THEN
SHIFTED A LITTLE MORE TO THE RIGHT AS IT TRAVELED ANOTHER ONE HALF
MILE THROUGH A NEIGHBORHOOD WITH ADDITIONAL TREE DAMAGE AND DAMAGE
TO PORTABLE BUILDINGS AND ROOFS. THE TORNADO APPEARS TO HAVE
LIFTED OR DISSIPATED NEAR THE INTERSECTION OF SPRINGVALE DRIVE AND
ALLENHURST DRIVE.

NO INJURIES OR DEATHS WERE REPORTED.

PAUL YURA...
WARNING COORDINATION METEOROLOGIST
NATIONAL WEATHER SERVICE AUSTIN-SAN ANTONIO TX
 

 

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