EF1 tornado in Ouachita County, Arkansas
Tornado October 29, 2009 · Ouachita County, Arkansas
NOAA records this tornado county by county. Its path ran through Union County → Ouachita County → Union County → Calhoun County → Ouachita County → Calhoun County → Calhoun County → Ouachita County → Ouachita County → Dallas County; the totals above are for the whole tornado.
The path drawn at its surveyed width of 1,050 yards (0.60 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.
What the National Weather Service wrote
A tornado moved out of Union County and into Ouachita County just east-southeast of Louann. Roof damage occurred to a number of residences and the roof was torn off a mobile home. Hundreds of trees were blown down or snapped off, and power lines were blown down. The tornado exited Ouachita County northeast of Frenchport and continued into Calhoun County about 6 2/3 miles southwest of Locust Bayou.
The wider storm
A large storm system in the Rockies headed through the Plains into the upper Midwest on the 29th. Rain increased ahead of the system, and became widespread in Arkansas. Meanwhile, a cold front arrived from the west. Because the system was so far to the north, it did not give the front much push. The front slowed down, which prolonged the rain. The result was widespread flash flooding, which gave way to areal flooding and river flooding. Winds changed direction and speed up through the atmosphere, a favorable condition for tornadoes. However, instability was sufficient only in southern Arkansas for the development of tornadoes.
Began near Louann (33.3747, -92.7874).
Other tornadoes from the same storm system
6 more tornadoes the National Weather Service filed under this storm episode.
Source: NOAA Storm Events Database, event 196809. Narratives are written by the National Weather Service forecast office that issued the report.
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