Karnes County Natural Disasters and Weather Extremes
The chance of earthquake damage in Karnes County is about the same as Texas average and is much lower than the national average. The risk of tornado damage in Karnes County is much lower than Texas average and is lower than the national average.
Earthquake Index, #28
| Karnes County | 0.06 |
| 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
| Karnes 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, #182
| Karnes County | 86.24 |
| 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 6,764 other weather extremes events within 50 miles of Karnes County were recorded from 1950 to 2010. The following is a break down of these events:
| Type | Count | Type | Count | Type | Count | Type | Count | Type | Count |
| Avalanche: | 0 | Blizzard: | 2 | Cold: | 14 | Dense Fog: | 2 | Drought: | 175 |
| Dust Storm: | 2 | Flood: | 2,054 | Hail: | 2,250 | Heat: | 9 | Heavy Snow: | 38 |
| High Surf: | 2 | Hurricane: | 1 | Ice Storm: | 17 | Landslide: | 0 | Strong Wind: | 81 |
| Thunderstorm Winds: | 1,789 | Tropical Storm: | 9 | Wildfire: | 29 | Winter Storm: | 32 | Winter Weather: | 39 |
| Other: | 219 | ||||||||
Volcanos Nearby
No volcano is found in or near Karnes County.
Historical Earthquake Events
A total of 1 historical earthquake event that had a recorded magnitude of 3.5 or above found in or near Karnes County.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 36.4 | 1984-03-03 | 3.9 | 5 | 28.85 | -98.46 |
Historical Tornado Events
A total of 21 historical tornado events that had recorded magnitude of 2 or above found in or near Karnes County.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 6.3 | 1966-04-25 | 3 | 28°49'N / 97°52'W | 28°49'N / 97°52'W | 0 | 3 | 250K | 0 | Karnes | ||
| 8.6 | 1967-05-08 | 2 | 28°58'N / 98°02'W | 29°01'N / 97°54'W | 8.90 Miles | 440 Yards | 0 | 0 | 3K | 0 | Karnes |
| 9.7 | 1960-10-15 | 2 | 28°54'N / 97°42'W | 2.00 Miles | 880 Yards | 0 | 0 | 25K | 0 | Karnes | |
| 25.4 | 1965-05-18 | 2 | 29°16'N / 97°46'W | 0.50 Mile | 33 Yards | 0 | 0 | 3K | 0 | Gonzales | |
| 26.4 | 1965-09-18 | 2 | 28°39'N / 98°11'W | 1.50 Miles | 880 Yards | 0 | 0 | 25K | 0 | Live Oak | |
| 28.3 | 1991-02-19 | 2 | 29°16'N / 97°38'W | 0.20 Mile | 10 Yards | 0 | 0 | 0K | 0 | Gonzales | |
| 32.0 | 1965-05-18 | 2 | 29°07'N / 98°20'W | 0 | 0 | 0K | 0 | Wilson | |||
| 34.0 | 1969-04-11 | 2 | 28°57'N / 97°18'W | 1.00 Mile | 33 Yards | 0 | 0 | 3K | 0 | De Witt | |
| 34.8 | 1956-10-20 | 2 | 28°27'N / 98°06'W | 1.50 Miles | 33 Yards | 0 | 0 | 0K | 0 | Live Oak | |
| 37.8 | 1959-05-10 | 2 | 29°16'N / 98°20'W | 1.00 Mile | 33 Yards | 0 | 0 | 3K | 0 | Bexar | |
| 38.0 | 2007-07-21 | 2 | 29°26'N / 97°58'W | 29°28'N / 97°58'W | 2.00 Miles | 150 Yards | 0 | 0 | 50K | 0K | Guadalupe |
| 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. | |||||||||||
| 39.1 | 1968-09-17 | 2 | 28°21'N / 97°45'W | 0.80 Mile | 100 Yards | 0 | 0 | 250K | 0 | Bee | |
| 40.1 | 1967-05-29 | 3 | 28°24'N / 98°11'W | 1.00 Mile | 33 Yards | 0 | 0 | 3K | 0 | Live Oak | |
| 40.6 | 1970-09-13 | 2 | 29°13'N / 98°26'W | 0.10 Mile | 17 Yards | 0 | 0 | 3K | 0 | Bexar | |
| 42.1 | 1953-12-01 | 3 | 29°30'N / 97°56'W | 29°32'N / 97°52'W | 5.10 Miles | 1760 Yards | 0 | 10 | 250K | 0 | Guadalupe |
| 45.8 | 1959-05-10 | 2 | 28°29'N / 98°26'W | 28°20'N / 98°17'W | 13.80 Miles | 150 Yards | 0 | 0 | 25K | 0 | Mcmullen |
| 46.7 | 1976-04-29 | 3 | 28°15'N / 97°41'W | 1.00 Mile | 33 Yards | 0 | 0 | 25K | 0 | Bee | |
| 46.9 | 1969-05-03 | 2 | 29°23'N / 98°25'W | 1.00 Mile | 67 Yards | 0 | 0 | 250K | 0 | Bexar | |
| 47.1 | 1956-10-20 | 2 | 29°35'N / 97°58'W | 1.00 Mile | 33 Yards | 0 | 1 | 3K | 0 | Guadalupe | |
| 47.2 | 1963-06-29 | 2 | 28°14'N / 97°40'W | 28°15'N / 97°42'W | 3.00 Miles | 33 Yards | 0 | 0 | 25K | 0 | Bee |
| 48.1 | 1969-05-22 | 2 | 29°36'N / 97°57'W | 0 | 0 | 3K | 0 | Guadalupe | |||
* 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.