Portland, TX Natural Disasters and Weather Extremes
The chance of earthquake damage in Portland is about the same as Texas average and is much lower than the national average. The risk of tornado damage in Portland is lower than Texas average and is higher than the national average.
Earthquake Index, #1282
| Portland, TX | 0.00 |
| 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
| Portland, TX | 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, #1207
| Portland, TX | 156.88 |
| 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 1,158 other weather extremes events within 50 miles of Portland, TX 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: | 0 | Cold: | 0 | Dense Fog: | 1 | Drought: | 7 |
| Dust Storm: | 0 | Flood: | 347 | Hail: | 319 | Heat: | 1 | Heavy Snow: | 1 |
| High Surf: | 1 | Hurricane: | 1 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 1 |
| Thunderstorm Winds: | 387 | Tropical Storm: | 2 | Wildfire: | 7 | Winter Storm: | 0 | Winter Weather: | 4 |
| Other: | 79 | ||||||||
Volcanos Nearby
No volcano is found in or near Portland, TX.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Portland, TX.
No historical earthquake events found in or near Portland, TX.
Historical Tornado Events
A total of 33 historical tornado events that had recorded magnitude of 2 or above found in or near Portland, TX.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 1.2 | 1980-08-09 | 2 | 27°52'N / 97°20'W | 1.00 Mile | 40 Yards | 0 | 0 | 2.5M | 0 | San Patricio | |
| 2.2 | 1961-04-29 | 2 | 27°48'N / 97°27'W | 27°58'N / 97°16'W | 16.00 Miles | 17 Yards | 0 | 0 | 25K | 0 | Nueces |
| 6.4 | 1965-05-15 | 2 | 27°50'N / 97°14'W | 0.10 Mile | 17 Yards | 0 | 0 | 0K | 0 | San Patricio | |
| 7.5 | 1967-09-22 | 2 | 27°43'N / 97°29'W | 27°50'N / 97°13'W | 18.20 Miles | 200 Yards | 0 | 0 | 0K | 0 | Nueces |
| 9.5 | 1954-10-22 | 3 | 28°09'N / 97°26'W | 27°52'N / 97°20'W | 20.50 Miles | 333 Yards | 0 | 25 | 250K | 0 | San Patricio |
| 10.9 | 1960-10-16 | 2 | 27°46'N / 97°26'W | 27°43'N / 97°23'W | 4.70 Miles | 33 Yards | 0 | 1 | 250K | 0 | Nueces |
| 14.5 | 2002-10-24 | 2 | 27°44'N / 97°37'W | 27°47'N / 97°25'W | 2.50 Miles | 200 Yards | 1 | 20 | 75.0M | 0 | Nueces |
| Brief Description: One Confirmed fatality and many injuries. The Tornado was first indentified by the public approximately 8 miles south of the CCI airport. Most extensive damage reported across Del MAr College. M?SC | |||||||||||
| 15.5 | 1961-06-18 | 2 | 27°40'N / 97°15'W | 1.00 Mile | 50 Yards | 0 | 0 | 25K | 0 | Nueces | |
| 15.8 | 1960-10-16 | 2 | 27°59'N / 97°31'W | 28°04'N / 97°32'W | 5.90 Miles | 100 Yards | 0 | 11 | 25K | 0 | San Patricio |
| 16.4 | 2010-06-02 | 2 | 28°03'N / 97°07'W | 28°00'N / 97°06'W | 4.00 Miles | 500 Yards | 0 | 0 | 250K | 0K | Aransas |
| Brief Description: EVENT NARRATIVE: An NWS survey team concluded a tornado touched down 4 miles west of Rockport. The tornado was on the ground for roughly 3.75 miles, traveling southeast and ending near Bypass 35 and 16th streets. The maximum wind speed was estimated at 120 mph, an EF-2, and had a maximum width of almost 3/10 of a mile. Several homes were damaged, an RV flipped, and 4 boats damaged. A home weather station recorded a peak wind gust to 103 mph before failing. Over 20 large tension poles were snapped completely off along Hwy 1069. Hundreds of trees and tree limbs were snapped. Vehicles at a salvage yard were moved several yards, and a garage was completely destroyed. An 18 wheeler was flipped over along Bypass 35. EPISODE NARRATIVE: During the late afternoon on June 2, 2010, thunderstorms developed over central Texas and the Sierra Madre of Mexico. A very unstable air mass was present over South Texas (CAPE values from 4500 to 5500 J/kg). At 7 pm CDT, the first line of thunderstorms entered the Rio Grande Valley and produced hail up to the size of nickels, localized flooding and strong winds. The second line of thunderstorms extended across much of Central Texas and began accelerating and tracking southward from Tilden to Goliad by late in the evening. The two lines of thunderstorms merged around Tilden and Choke Canyon Reservoir near 1000 pm CDT causing intensification to the convective complex of storms. This was evident by severe storms over Live Oak and Bee counties with increased reflectivity and cloud to ground lightning between 1030 and 1100 pm CDT. At the same time, the northern line of thunderstorms continued through the Victoria Crossroads area and slowly weakened. The strongest portion of the solid line of thunderstorms continued southeastward into the central Coastal Bend. Reports of trees down and power outages increased from along I-37 to Corpus Christi from the most intense portion of the line of thunderstorms. WSR-88D detected small areas of rotation over Aransas, San Patricio and Nueces Counties between 1100 and midnight CDT when tornado warnings were issued. Wind gusts of 60 mph were common from automated weather stations as the storms slammed the lower Coastal Bend. Power outages from the wind were significant by midnight and there were many reports of trees and power lines down, and rescue operations for recreational trailers that were tipped over on the base of Navy Corpus Christi and a flipped 18-wheeler. In this area, automated sensors measured wind as high as 80 mph. The lightning was intense and continuous at times, which caused additional damage to a few structures. The line of thunderstorms produced widespread 1 to 2 inches of rain across South Texas with locally higher amounts. Total cloud to ground lightning strikes observed by the National Lightning Detection Network were near 38,000 from 800 pm to 200 am CDT. In Nueces County up to 31,000 residence had interruption to their power according to AEP. | |||||||||||
| 17.3 | 1953-10-23 | 2 | 27°50'N / 97°04'W | 27°52'N / 97°01'W | 4.10 Miles | 100 Yards | 0 | 0 | 25K | 0 | Nueces |
| 20.5 | 1963-11-08 | 3 | 28°10'N / 97°25'W | 1.00 Mile | 50 Yards | 0 | 1 | 25K | 0 | Refugio | |
| 21.0 | 1967-09-20 | 3 | 28°04'N / 97°03'W | 1.50 Miles | 100 Yards | 0 | 3 | 250K | 0 | Aransas | |
| 21.0 | 1968-05-09 | 2 | 27°42'N / 97°36'W | 1.50 Miles | 10 Yards | 0 | 1 | 25K | 0 | Nueces | |
| 22.5 | 1976-05-26 | 2 | 27°57'N / 97°41'W | 0.50 Mile | 40 Yards | 0 | 1 | 25K | 0 | San Patricio | |
| 29.7 | 1969-05-12 | 2 | 27°47'N / 97°50'W | 27°49'N / 97°46'W | 4.90 Miles | 33 Yards | 0 | 0 | 3K | 0 | Nueces |
| 32.4 | 1965-05-18 | 2 | 28°18'N / 97°16'W | 28°22'N / 97°06'W | 11.20 Miles | 100 Yards | 0 | 0 | 3K | 0 | Refugio |
| 32.8 | 1969-05-16 | 3 | 28°02'N / 97°50'W | 0.50 Mile | 20 Yards | 0 | 0 | 25K | 0 | San Patricio | |
| 33.2 | 1962-08-20 | 2 | 28°05'N / 97°49'W | 1.50 Miles | 43 Yards | 0 | 0 | 0K | 0 | San Patricio | |
| 33.2 | 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 |
| 33.6 | 1976-04-29 | 3 | 28°15'N / 97°41'W | 1.00 Mile | 33 Yards | 0 | 0 | 25K | 0 | Bee | |
| 35.5 | 1970-06-24 | 3 | 27°34'N / 97°47'W | 1.50 Miles | 200 Yards | 1 | 15 | 250K | 0 | Nueces | |
| 35.7 | 1976-04-28 | 2 | 27°35'N / 97°48'W | 0.50 Mile | 30 Yards | 0 | 0 | 3K | 0 | Nueces | |
| 35.7 | 1980-08-10 | 2 | 27°35'N / 97°48'W | 2.50 Miles | 40 Yards | 0 | 0 | 2.5M | 0 | Nueces | |
| 37.2 | 1980-08-09 | 2 | 27°35'N / 97°48'W | 27°37'N / 97°53'W | 5.90 Miles | 50 Yards | 0 | 3 | 2.5M | 0 | Nueces |
| 37.7 | 1976-05-07 | 2 | 27°58'N / 97°56'W | 0 | 0 | 0K | 0 | Jim Wells | |||
| 38.3 | 1970-08-03 | 2 | 28°06'N / 97°54'W | 0 | 2 | 25K | 0 | Live Oak | |||
| 41.5 | 1968-09-17 | 2 | 28°21'N / 97°45'W | 0.80 Mile | 100 Yards | 0 | 0 | 250K | 0 | Bee | |
| 46.5 | 1967-09-22 | 2 | 27°56'N / 98°05'W | 2.00 Miles | 33 Yards | 0 | 0 | 0K | 0 | Jim Wells | |
| 47.3 | 1980-08-10 | 2 | 27°45'N / 98°05'W | 2.00 Miles | 40 Yards | 0 | 1 | 250K | 0 | Jim Wells | |
| 47.8 | 1959-05-10 | 2 | 28°06'N / 98°06'W | 28°03'N / 98°03'W | 4.90 Miles | 250 Yards | 0 | 0 | 25K | 0 | Live Oak |
| 49.1 | 1962-06-01 | 2 | 27°39'N / 98°05'W | 1.00 Mile | 50 Yards | 0 | 0 | 25K | 0 | Jim Wells | |
| 49.2 | 1959-05-10 | 2 | 28°07'N / 98°07'W | 28°05'N / 98°04'W | 4.30 Miles | 167 Yards | 0 | 0 | 25K | 0 | Live Oak |
* 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.