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On March 23, 1913 the rain started falling across the Mid-west and it didn’t stop for 4 days and 4 nights. The deluge resulted in epic flooding unequaled in American history before and after. Known as the Great Flood. The storm system that produced the flood in late March 1913 began with a typical winter storm pattern, but developed characteristics that promoted heavy rain and at times sleet and snow. As the storm gained strength on Sunday, March 23, high winds, hail, sleet, and tornadoes settled in across a vast swath of the nation’s mid-section. Major tornadoes hit Omaha, Nebraska where 94 died; also hit were Lone Peach, Arkansas; and Terre Haute, Indiana. On Monday and Tuesday, March 24 and 25, 3 to 8 inches of rain fell in Ohio, Indiana, and southern Illinois. Major rivers in Indiana and Ohio experienced heavy runoff. Downstream, where the Ohio River enters the Mississippi River, the water level broke record highs. By Tuesday, March 25, the Ohio River and its tributaries flooded cities such as Indianapolis, Cincinnati, Youngstown and Columbus. Dayton, Ohio, was particularly hard-hit. On Wednesday, March 26, the storm moved east into Pennsylvania and New York, while heavy rain continued in the Ohio valley. The heaviest rainfall, 6 to 9, covered an area from southern Illinois into northwestern Pennsylvania. As the storm continued eastward, flooding began in New York, Massachusetts, Vermont, and Virginia. The Potomac River overflowed its banks in Maryland. 467 died in the floods and damage reached $147 million or almost $4 billion in 2022 dollars.
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Often times wave patterns develop in the high atmosphere, the strongest winds in these waves are represented by the jet stream. These waves in the air, like waves in the ocean, have high and low points over time and space. From a geographical perspective the high point usually supports high pressure and the low points low pressure or storms. On the western side of the high pressure or ridging it’s usually warm and winds blow from the south, close to the center of the low point or trough of the wave there is storminess. When patterns like this develop to the extreme, with great definition contrast in the waves, in the wintertime there can be awesome extremes. One such extreme case happened On March 20, 1948. A trough or dip in the wave caused a massive storm to hit Alaska dumping heavy snow in Juneau, the states capitol, where 32.5” of snow fell the heaviest ever there from one storm. Meanwhile far to the east in the eastern part of the US, a ridge, or rise in the jet stream, resulted in record warmth across the Carolinas. In some places like Raleigh and Greensboro, NC the mercury barely dipped below 70 for a low temperature setting records for the warmest March night ever recorded there.
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On March 16, 1843 one the first winter storms to be documented to sweep out of the Gulf and Mexico and impact must of the eastern part of the nation was observed. At the start of the second week of March in 1843 arctic air moved southward out of the vast snowfields of the Yukon, down the east slopes of the Rockies and then spread eastward to the Atlantic seaboard. The cold air held for the next few days and on its southern flank, well south in the Gulf of Mexico a storm started to organize. That system strengthened rapidly and then blasted up the east coast, but far enough out in the ocean to keep most mild ocean air away from land. The result was snow from the Gulf of Mexico to Maine. This great snowstorm dumped 8” in Little Rock, AR; 10" in Memphis, TN and a foot of snow in Washington, Baltimore and Philadelphia. Drifts reached 4-5 feet in New York City. Snow turned to rain then back to snow at Providence, RI. 4-6". All snow with punishing gales were recorded in Portland, ME.
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