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Comal County Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Comal County is about the same as Texas average and is much lower than the national average. The risk of tornado damage in Comal County is lower than Texas average and is higher than the national average.

Topics:Earthquake IndexVolcano IndexTornado IndexOther Weather Extremes EventsVolcanos NearbyHistorical Earthquake EventsHistorical Tornado Events

Earthquake Index, #126

Comal County
0.01
Texas
0.04
U.S.
1.81

The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.

Volcano Index, #1

Comal County
0.0000
Texas
0.0000
U.S.
0.0023

The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.

Tornado Index, #126

Comal County
146.60
Texas
208.58
U.S.
136.45

The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.

Other Weather Extremes Events

A total of 7,844 other weather extremes events within 50 miles of Comal County were recorded from 1950 to 2010. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:2Cold:17Dense Fog:2Drought:203
Dust Storm:3Flood:2,267Hail:3,046Heat:9Heavy Snow:49
High Surf:1Hurricane:1Ice Storm:27Landslide:0Strong Wind:95
Thunderstorm Winds:1,862Tropical Storm:9Wildfire:23Winter Storm:44Winter Weather:52
Other:132 

Volcanos Nearby

No volcano is found in or near Comal County.

Historical Earthquake Events

No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Comal County.

No historical earthquake events found in or near Comal County.

Historical Tornado Events

A total of 54 historical tornado events that had recorded magnitude of 2 or above found in or near Comal County.

Distance (miles)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
11.71966-05-21229°42'N / 98°06'W2.00 Miles880 Yards000K0Cottle
13.41967-09-20329°39'N / 98°07'W5.00 Miles67 Yards00250K0Comal
13.61980-08-10229°54'N / 98°05'W30°06'N / 98°25'W24.20 Miles33 Yards0025.0M0Hays
15.91954-07-12229°35'N / 98°20'W1.00 Mile33 Yards003K0Bexar
16.31958-05-03229°43'N / 98°41'W29°43'N / 98°20'W21.00 Miles67 Yards0025K0Bexar
16.81961-09-04229°37'N / 98°04'W29°37'N / 98°05'W1.90 Miles33 Yards003K0Guadalupe
17.71976-03-30230°00'N / 98°04'W1.00 Mile100 Yards0025K0Hays
18.11980-08-10229°54'N / 97°52'W29°54'N / 98°05'W13.10 Miles200 Yards02025.0M0Caldwell
19.81961-11-12229°52'N / 97°56'W003K0Hays
20.31967-05-01229°39'N / 97°58'W0.50 Mile20 Yards003K0Guadalupe
22.01953-04-28329°33'N / 98°32'W29°35'N / 98°28'W4.90 Miles200 Yards15250K0Hays
23.01956-10-20229°35'N / 97°58'W1.00 Mile33 Yards013K0Guadalupe
23.11969-05-22229°36'N / 97°57'W003K0Guadalupe
25.81976-03-30230°02'N / 97°55'W2.50 Miles200 Yards01250K0Hays
26.11980-08-10230°06'N / 98°25'W30°08'N / 98°35'W10.40 Miles33 Yards0025.0M0Blanco
26.41970-04-18229°40'N / 98°40'W0.50 Mile67 Yards0025K0Bexar
27.21950-05-15229°47'N / 98°50'W29°40'N / 98°34'W18.00 Miles33 Yards0025K0Kendall
28.51969-05-06330°06'N / 98°35'W30°07'N / 98°34'W2.30 Miles100 Yards0025K0Kendall
28.71969-05-16229°25'N / 98°30'W29°27'N / 98°27'W4.30 Miles100 Yards03250K0Bexar
29.01985-04-22230°02'N / 97°51'W0.50 Mile50 Yards00250K0Hays
29.11953-12-01329°30'N / 97°56'W29°32'N / 97°52'W5.10 Miles1760 Yards010250K0Guadalupe
29.71957-03-31229°49'N / 98°45'W1.50 Miles880 Yards003K0Kendall
29.92007-07-21229°26'N / 97°58'W29°28'N / 97°58'W2.00 Miles150 Yards0050K0KGuadalupe
 Brief Description: EVENT NARRATIVE: At approximately 4:25 am CST a tornado estimated to be an EF-2 touched down about 9 miles south of Seguin and 1/4 mile southeast of CR411. The tornado moved northward along SH123 for nearly 1 mile before turning slightly to the north northwest and crossing CR410. It damaged three outbuildings, a residence and a store, but no one was injured. The tornado ranged in width from 50 yards up to 150 yards. The total track length was approximately 2 miles. EPISODE NARRATIVE: Thunderstorms associated with a persistent upper level low produced heavy rain and flash flooding through the morning on July 21.
30.61969-05-03229°23'N / 98°25'W1.00 Mile67 Yards00250K0Bexar
30.61969-05-06330°07'N / 98°34'W30°17'N / 98°24'W15.20 Miles100 Yards0225K0Blanco
31.01980-08-10229°25'N / 98°25'W29°25'N / 98°37'W12.20 Miles100 Yards02250K0Bexar
31.31953-04-28429°34'N / 98°42'W1.00 Mile1760 Yards2150K0Bexar
32.71988-09-17229°24'N / 98°38'W29°29'N / 98°35'W5.00 Miles50 Yards0325.0M0Bexar
32.91961-11-12229°54'N / 97°43'W1.00 Mile433 Yards0025K0Caldwell
33.41961-11-22329°23'N / 98°32'W1.00 Mile50 Yards003K0Bexar
33.61983-03-04229°54'N / 98°50'W29°52'N / 98°47'W4.00 Miles100 Yards01250K0Kendall
33.71976-03-30229°56'N / 98°55'W29°58'N / 98°40'W15.20 Miles200 Yards002.5M0Kendall
37.11970-05-15230°15'N / 98°36'W0.50 Mile27 Yards003K0Gillespie
37.21957-04-26229°41'N / 97°39'W003K0Caldwell
37.31959-05-10229°16'N / 98°20'W1.00 Mile33 Yards003K0Bexar
38.41965-08-28229°51'N / 97°37'W0.50 Mile33 Yards000K0Caldwell
39.62001-10-12330°15'N / 98°40'W30°16'N / 98°39'W2.50 Miles400 Yards051.0M100KGillespie
 Brief Description: The strongest of the Friday night tornadoes struck the town of Stonewall. This tornado, rated F3 on the Fujita Scale, was preceded by brief gusty winds of 30 to 40 miles per hour, very heavy rainfall and spotty .5-inch hail. The tornado formed around 830 pm CST near the intersection of Hahn Road and SH290. It moved north-northeastward for .75 miles, crossing SH290 and the Pedernales River. Just north of the river, it made a slight turn toward the east, now moving another mile toward the northeast. It crossed North River Road and continued over open country until it crossed Ranch Road 1623. After passing RR1623 for approximately .25 miles, it dissipated. The worst damage, F3 level, was to trees and homes between RR1623 and SH290, across the northwest and north central part of Stonewall. Ninety homes sustained damage with 6 destroyed. In addition, 7 mobile homes were destroyed and 20 damaged. Damage was also reported to 22 buildings. A two-story home had the entire second story destroyed, and a concrete building lost most of its walls and all of its roof. Other damage along the path typically included destroyed and damaged roofs and walls of homes and businesses as well as widespread damage to trees. The tornado path was approximately .25 miles in width and 2.5 miles in length. Although the tornado was not seen due to the late hour and darkness, residents did report that after heavy rain and hail, the wind became calm, and it was followed by a "roaring sound" so often reported in tornadoes. Five persons were injured with one man hospitalized as a result of the tornado.
40.71969-05-06330°17'N / 98°24'W30°29'N / 98°21'W14.20 Miles100 Yards0025K0Blanco
40.71997-05-27430°22'N / 98°01'W30°20'N / 97°59'W5.60 Miles440 Yards1515.0M0KTravis
 Brief Description: M25MH The Pedernales Valley tornado began on the shore of Lake Travis destroying trees and a floating marina where nearly all of the watercraft were destroyed. While numerous trees were twisted and uprooted in this area, several structures sustained only what appeared to be minor damage that would be no more than F0. The tornado was initially moving westward as it moved into rough terrain. A number of structures sustained varying damage until the tornado reached Bee Creek Road. At that location, a Southwest Bell building housing telephone switching equipment was destroyed. The building was well constructed and was one of several buildings which indicated at F4 rating for this tornado. Bee Creek Road takes a bend close to the telephone building and across the street a house was destroyed with walls knocked down. Approximately 2.2 miles from the lake, the tornado path takes a distinct dog leg turn toward the southwest. The point at which this dog-leg turn occurred also corresponds with a knoll. Trees and buildings at the top of the knoll were destroyed. After the dog-leg turn, the tornado assumed a heading of 250 degrees and crossed a major power distribution line. One steel tower was destroyed bringing all lines to the ground. The tornado remained on the 250 degree heading moving through the area described as the Hazy Hills subdivision. Numerous houses and several mobile homes were totally destroyed. Several houses survived but sustained major damage making them totally uninhabitable. The only death associated with this tornado occurred here when one man was killed. He lived in a mobile home that was demolished and his vehicle was tossed several hundred feet. Other survey team members were unable to learn whether he was in the mobile home or had left it to drive away. The tornado continued west-southwest moving across State Road (SR) 71. A number of well built homes in the Hazy Hills subdivision were heavily damaged or destroyed. Crossing SR 71, the tornado moved into another subdivision with widely separated houses in the Lick Creek valley, a steep walled creek that feeds into the Pedernales River. One stone-walled house located just north of Pedernales Drive and west of SR 71 was completely deroofed. Other structures in this subdivision sustained roof damage in the F2 range. After following the terrain into the creek it climbed another rise in the land before ending shortly after passing the crest of the small hill. As the tornado ended, damage was minimal to trees.
41.51958-05-02229°17'N / 98°51'W29°34'N / 98°44'W20.80 Miles200 Yards00250K0Medina
41.51971-02-25229°53'N / 97°40'W29°57'N / 97°29'W11.90 Miles50 Yards000K0Caldwell
41.91970-09-13229°13'N / 98°26'W0.10 Mile17 Yards003K0Bexar
42.81973-01-20230°21'N / 97°55'W0.10 Mile40 Yards0025K0Travis
44.81961-08-04229°42'N / 97°31'W0.10 Mile100 Yards033K0Caldwell
45.01959-11-03229°57'N / 99°02'W30°02'N / 98°55'W9.10 Miles1760 Yards0025K0Kerr
45.82002-03-19229°15'N / 98°41'W29°16'N / 98°42'W1.50 Miles50 Yards0302.0M0Bexar
 Brief Description: Tornado number five, strongest of the six and rated as a minimal F2 tornado on the Fujita Scale, formed about 3.5 miles southwest of the intersection of Loop 1604 and I35. It struck near 720 pm along near Silver Street and Bravo Street and moved toward the north for 1.5 miles. It apparently weakened periodically, producing a hit-and-miss damage path. It completely destroyed four mobile homes and damaged several others.
46.11977-04-14230°16'N / 98°00'W30°34'N / 97°54'W21.60 Miles200 Yards00250K0Travis
46.81962-05-28230°17'N / 98°51'W30°17'N / 98°46'W5.10 Miles100 Yards000K0Gillespie
47.21980-08-10230°15'N / 97°39'W30°18'N / 97°43'W5.40 Miles150 Yards04250.0M0Travis
47.31965-05-18229°16'N / 97°46'W0.50 Mile33 Yards003K0Gonzales
47.51965-04-15229°51'N / 97°31'W29°54'N / 97°25'W6.90 Miles50 Yards000K0Caldwell
47.61965-05-18229°07'N / 98°20'W000K0Wilson
48.01970-07-04230°26'N / 97°55'W1.50 Miles47 Yards140K0Travis
49.21997-05-27230°28'N / 97°56'W30°26'N / 97°53'W3.60 Miles100 Yards0050K10KTravis
 Brief Description: The Cedar Park tornado formed around 3:05 pm CST from a different supercell thunderstorm. It first touched down about 3.5 miles north of Cedar Park at a location 0.6 miles south of CR 178 and 1.4 miles east of the intersection of US 183 and CR 178. The initial damage was to trees, however, the ground survey revealed damage nearby to a church and a trucking company. The aerial survey did not reflect this damage as being in line with the damage path. It is quite possible this damage was caused by strong wind near the tornado. The beginning point was in a relatively open area with damage primarily to a few trees and minor shingle damage to one house. The tornado moved south-southwestward skirting a residential area before it crossed CR 180 immediately east of US 183. A historic train located on the north side of CR 180 just to the east of US 183 was in the direct path of the tornado. While the engine remained on the track, a coal tender converted to hold diesel fuel and weighing approximately 65,000 pounds including the 1,000 gallons of diesel fuel was flipped over and thrown a short distance. Continuing across CR180, it entered a shopping center where it weakened and pushed inward slightly the north wall of a grocery store. It also pushed large metal doors inward that were built to open toward the outside. Damage at this point had been generally F2 with brief F3 as the tornado knocked the train tender off the track and damaged the wall and doors of the food store. It tore off much of a weakly supported roof of a grocery store. The manager of the store, who had been a victim of the Wichita Falls Tornado of 1979, saw the approaching tornado, and made an announcement to all in the store to meet him in the middle of the store. He then led everyone he could gather into the meat locker. This very quick and decisive action probably saved several lives. The tornado crossed US 183 causing additional damage to a number of businesses. One business on the west side of US 183 lost nearly the entire roof. Most damage to other businesses was believed to be minor. After crossing US 183 the tornado moved across Marquis Lane and North Park Circle moving through an area with widely scattered housing and a relative abundance of trees. Again, most damage to structures in this area was minor. From North Park Circle the tornado moved into the northwestern portion of Buttercup Creek, a subdivision of well constructed homes. Damage to homes was irregular with one house losing a roof but the house next door losing only shingles. Two homes in the area were nearly destroyed an one damaged when a pickup truck was lifted and tossed against its front wall. Eleven homes were destroyed, with damage reported to over 100 homes. The damage level ranged from F0 to F2. At this point, the tornado track was taking a gentle right turn as the tornado track became more southwesterly. The tornado moved into a wooded area crossing into Travis County before ending 1.1 miles from Lake Travis. Damage in the wooded area was irregular ranging from near total destruction of all trees to sections with about 10 percent of the trees down.


* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.


 
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