'Tis the season for extremely heavy precipitation events. The atmosphere is loaded with moisture and overnight storms are fed by expansive reservoirs of humid and unstable air by the low level jet. Storms do not move very fast thanks to limited winds aloft and tend to back build / train over top the same locations producing prodigious amounts of rainfall. You may recall the record rainfall event two weeks ago for St Louis. On Sunday, it was Sioux Falls turn with 5.44 inches reported for the day. The featured chart presents the maximum daily totals by month for the site. Yesterday's event bested the previous high of 4.59 by a comfortable margin. Iowa has seen its share of localized and heavy rainfall events over the past few days. The rainfall is certainly welcome and likely able to help the corn and certainly help the soybeans that are both at critical stages for yield potential.

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