EF1 tornado in Bollinger County, Missouri
Tornado May 25, 2011 · Bollinger County, Missouri
NOAA records this tornado county by county. Its path ran through Madison County → Bollinger County; the totals above are for the whole tornado.
The path drawn at its surveyed width of 250 yards (0.14 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
The tornado continued into Bollinger County from Madison County. Hundreds of trees were uprooted and snapped. Peak winds were estimated near 100 mph. The average path width was 200 yards.
The wider storm
Numerous strong to severe thunderstorms occurred in the warm sector of a low pressure system over central Missouri. The air mass in the warm sector was very unstable, with afternoon mixed-layer cape values in the 2500 to 4000 j/kg range. A 65 to 75 knot mid level jet was located across Arkansas, with the nose of the jet moving into western Kentucky. This feature enhanced the lift and strong deep-layer shear already in place, creating an environment very favorable for supercells and tornadoes. A 40 to 55 knot low level jet across eastern Arkansas moved into western Kentucky during the evening, resulting in a long-track strong tornado.
Began near Grisham (37.4353, -90.1400).
Other tornadoes from the same storm system
8 more tornadoes the National Weather Service filed under this storm episode.
Source: NOAA Storm Events Database, event 307053. Narratives are written by the National Weather Service forecast office that issued the report.
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