October 2010 Arizona tornado outbreak

October 2010 Arizona tornado outbreak
October 2010 Arizona tornado outbreak
A home damaged by an EF2 tornado in Bellemont, Arizona
Date of tornado outbreak: October 6, 2010
Duration1: 1:58 a.m. – 1:05 p.m. MST (11 hours, 57 minutes)
Maximum rated tornado2: EF3 tornado
Tornadoes caused: 9 confirmed
Damages: $332 million
Fatalities: None reported (11 injuries)
Areas affected: Southwestern United States

1Time from first tornado to last tornado
2Most severe tornado damage; see Enhanced Fujita Scale

The October 2010 Arizona tornado outbreak was the largest single-day tornado-event in Arizona history, with eight tornadoes touching down. Additionally, a brief tornado touched down in Utah.

Contents

Meteorological synopsis

On October 5, 2010, a strong area of low pressure situated off the coast of California produced a southerly flow of warm, moist air into Arizona. Clear skies throughout the day allowed for significant instability, resulting in scattered severe thunderstorms during the evening hours. These storms produced widespread damaging hail, ranging up to 2.75 in (7.0 cm) in diameter, and hurricane-force wind gusts of 86 mph (138 km/h). In Phoenix, 2 in (5.1 cm) hail caused considerable damage to structures.

Confirmed tornadoes

Confirmed
Total		 Confirmed
EF0		 Confirmed
EF1		 Confirmed
EF2		 Confirmed
EF3		 Confirmed
EF4		 Confirmed
EF5
9 3 1 4 1 0 0

October 6 event

List of reported tornadoes - Wednesday, October 6, 2010
EF#
Location
County
Coord.
Time (UTC)
Path length
Comments/Damage
Arizona
EF1 NE of Clint's Well Coconino 34°28′59″N 111°17′24″W / 34.483°N 111.29°W / 34.483; -111.29 (Clint's Well (Oct. 6, EF1)) 0858 14.06 miles (22.63 km) Many trees were knocked down with several forest roads blocked.
EF2 Bellemont area (1st tornado) Coconino 34°59′11″N 111°52′16″W / 34.9863°N 111.871°W / 34.9863; -111.871 (Bellemont (Oct. 6, EF2)) 1153 34.14 miles (54.94 km) Unusually long-lived tornado remained on the ground for 51 minutes along a path 34.14 mi (54.94 km) long, ranking it as the longest tracked tornado in Arizona history. Over 100 houses and several businesses were damaged, including at least 21 houses that were destroyed. Massive tree damage was also reported with campers isolated as a result. Seven people were injured.
EF2 Bellemont area (2nd tornado) Coconino 34°59′51″N 111°52′37″W / 34.9976°N 111.877°W / 34.9976; -111.877 (Bellemont (Oct. 6, EF2)) 1254 32.02 miles (51.53 km) Long track (second longest in the state's history), large wedge tornado derailed a train and damaged 28 rail cars. Forest damage was severe and many roads were blocked. Power poles were also snapped.
EF2 S of Bellemont Coconino 34°58′57″N 111°55′37″W / 34.9824°N 111.927°W / 34.9824; -111.927 (Bellemont (Oct. 6, EF2)) 1350 18.55 miles (29.85 km) Tornado remained in forested areas with severe tree damage.
EF2 NNW of Sedona Airport Coconino 34°58′52″N 111°52′34″W / 34.981°N 111.876°W / 34.981; -111.876 (Kachina (Oct. 6, EF2)) 1610 2.77 miles (4.46 km) Significant tree damage in the area.
EF0 SE of Bumble Bee Yavapai 34°08′09″N 112°03′18″W / 34.1358°N 112.055°W / 34.1358; -112.055 (Bumble Bee (Oct. 6, EF0)) 1730 7.26 miles (11.68 km) Tornado remained over grasslands east of Interstate 17.
EF3 SE of Tuba City Coconino 35°56′03″N 111°00′04″W / 35.9342°N 111.001°W / 35.9342; -111.001 (Tuba City (Oct. 6, EF3)) 1905 unknown Very large tornado, estimated at 0.625 mi (1.006 km) wide, tracked over an unpopulated region. Three metal truss transmission towers were destroyed - one of which was flattened - on the Navajo Nation. Aside from this, no other damage took place and a track could not be determined as the area covered by the tornado was remote wilderness. This was one of three EF3 tornadoes in the state since 1950.
EF0 S of Munds Park Coconino 34°56′25″N 111°39′54″W / 34.9404°N 111.665°W / 34.9404; -111.665 (Munds Park (Oct. 6, EF0)) 1905 17.05 miles (27.44 km) Tornado visually observed in several locations with minimal damage. Houses sustained damage to windows and siding.
Utah
EF0 WSW of Canyonlands National Park Wayne 38°17′N 110°17′W / 38.28°N 110.28°W / 38.28; -110.28 (Canyonlands (Oct. 6, EF0)) 2000 1.24 miles (2.00 km) About 30 juniper trees were snapped or uprooted in a remote forested area.
Sources:

SPC Storm Reports for 10/06/10, NWS Flagstaff, NCDC Storm Data

Hailstorms

Prior to the tornado outbreak, widespread hail impacted southern Arizona. In some instances, record or near record-sized hailstones were measured and the largest stone reached 2.75 in (7.0 cm) in diameter.[1] Overall, the hail caused roughly $330 million in damage and injured one person.[2]

See also

  • Tornadoes of 2010

References

  1. ^ "Tornado Outbreak Strikes Northern Arizona". National Weather Service in Flagstaff, Arizona. National Oceanic and Atmospheric Administration. October 12, 2010. http://www.wrh.noaa.gov/fgz/News/06Oct2010tor/06Oct2010.html. Retrieved June 22, 2011. 
  2. ^ "NCDC Storm Events Database". National Climatic Data Center. 2011. http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~storms. Retrieved June 22, 2011. 

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