This Day in National/World Weather History ...
 15 September 1988 → A tornado tracked along a 25 mile path in Senekal, South Africa, resulting in two fatalities.
 15 September 1989 → "Princess", the Hurricane Hunter reconnaissance plane, was nearly lost when it went into the eye of Hurricane Hugo. It apparently hit a tornado-like vortex and lost one of its four engines. Fortunately the crew found a weaker spot in the eyewall and escaped.

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July 21, 1940:

From near Miller, a tornado moved southeast, destroying a barn, garage, and two windmills. This tornado was estimated to be F2 strength.

July 21, 1987:

During the afternoon, an unusually severe thunderstorm moved northeast through northwest Wyoming and spawned the highest elevation F4 tornado ever documented. The tornado touched down in the Teton Wilderness Area, and created a massive blow down of trees as it travel north northeast. The distance traveled was 24.3 miles and ended along the Yellowstone River in the southeast corner of Yellowstone National Park. The path averaged 1.5 miles in width, reaching a maximum width of 2.5 miles.


Record Highs: Record Lows:
Aberdeen: 106 (1899) Aberdeen: 41 (1902)
Kennebec: 113 (1934) Kennebec: 41 (1947)
Mobridge: 108 (1960) Mobridge: 44 (1947)
Pierre: 110 (1934) Pierre: 46 (1947)
Sisseton: 101 (1960) Sisseton: 46 (1947)
Timber Lake: 105 (2007) Timber Lake: 48 (1947)
Watertown: 110 (1934) Watertown: 40 (1911)
Wheaton: 102 (1960) Wheaton: 51 (1915)

Record Precipitation:
Aberdeen: 2.03" (1939)
Kennebec: 1.50" (1978)
Mobridge: 1.42" (1966)
Pierre: 0.94" (1978)
Sisseton: 1.18" (1972)
Timber Lake: 1.36" (1966)
Watertown: 0.85" (1939)
Wheaton: 1.34" (1914)


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