Rising temperature

 By all accounts 2012 is shaping up to be a very warm spring. Water temperatures in the Lower Missouri River are far ahead of normal (see graph below). In most years we might see pallid sturgeon spawning temperatures (about 16-22 C) in late April to mid-May in the Jefferson City, Missouri area; this year water temperatures are already at this level a month and a half ahead of schedule. Sioux City, Iowa temperatures are also climbing, and unless we get a substantial cold front, temperatures in segments just downstream of Gavins Point dam are likely to be near spawning by the second week in April. 

Water temperature at Sioux City, Iowa and Jefferson City, Missouri during March through June 2011 and 2012

 

 

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