Flood of 1945

Severe Thunderstorm Threat From the Central Plains to the Northeast; Extreme HeatRisk for the East Coast

Strong to severe thunderstorms are possible from the central Plains to the Northeast through this evening. Widespread damaging winds are the primary threat but hail and a tornado or two is also possible. Extremely dangerous heat continues across the Eastern U.S. Warm overnight low temperatures will provide little to no relief. Read More >

The Ohio River Flood of March 1945

Although the Great Flood of 1937 gets most of the attention, and perhaps deservedly so, the flood that beset the Ohio River Valley eight years later was also extremely damaging. While 1937 is the flood of record at Louisville, 1945 is in second place (albeit a distant 2nd), with a peak stage at Louisville of 74.4 feet. This stage is about eleven feet below the 1937 stage, and ties with the stage set during the devastating 1884 flood.

1937 Stage

Rank

1945 Stage

Rank

1884 Stage

Rank

Clifty Creek

475.9

464.0

464.3

McAlpine Upper

52.15

42.1

41.7

McAlpine Lower

85.44

74.4

2 (tie)

74.4

2 (tie)*

Cannelton

60.8

54.4

N/A**

Tell City

56.95

52.0

50.8

4***

* McAlpine Lower's 3rd highest stage is 73.46' set in 1964
** Cannelton's 3rd highest stage is 53.9' set in 1964
*** Tell City's 2nd highest stage is 53.0' set in 1964

As is almost always the case with massive Ohio River floods, snow melt had very little impact. The deepest snow cover at Louisville between New Year's Day and the flood was only 3 inches on the 29th of January, and that melted away in a few days. The bulk of the heavy rain that caused the flood fell during a three week period leading up to the flood. Rainfall during that time was over 500% of normal in southern Indiana, and around 400% of normal along the length of the Ohio River (see graphics below -- click on them for a larger image).

Kentucky/southern Indiana precipitation departure from normal.

U.S. precipitation departure from normal.

The rain came in four main waves, on February 20-21, February 25-26, March 1-2, and March 5-6. February 26 still stands as Louisville's 5th wettest February day on record (2.85"), and March 6 is the 10th wettest March day on record (2.66"). March 1945 is the 3rd wettest March on record, and February 1945 is actually only #19 on the list. However, instead of looking at calendar months, the period February 20 - March 8, 1945 is the second wettest such period on record at Louisville (1997 is #1).

The following photos were taken in the Butchertown neighborhood in the vicinity of today's I-64/71 split.