"Mississippi River record-low water levels ease some, but long-term forecast is dry"
Rains from Hurricane Rosyln will help Mississippi River water levels this week, but the coming La Niña winter is likely to bring long-term below-average precipitation over the river's watershed. The shrunken Mississippi River, flowing at its lowest rate on record along much of a 270-mile stretch, will receive a minor short-term bump in water levels this week from Hurricane Roslyn's rains. However, with another La Niña winter in the cards, the long-term outlook for the river is unfortunately very dry. As reported by Bloomberg on October 21, barge shipments of corn during the first week of October were down 50% from the same time in 2021, and more than 2,000 barges were backed up. The low water levels have also allowed salt water to move upriver to threaten drinking water supplies in New Orleans, forcing the Army Corps to build an underwater dam to stop the upstream advance of the ocean water.

Mississippi River at St. Paul
Water levels along the entire Mississippi River are running very well, including close to home. The image below shows the latest river level along the Mississippi at St. Paul from Tuesday, which was 3.4ft and now one of the top 10 lowest levels ever recorded along the Mississippi.

Low Water Records For Mississippi River at St. Paul
Here are the 10 lowest water records for the Mississippi River at St. Paul. Note that the current level was around 3.4ft, which puts it now in the top 10 lowest levels ever recorded there. Note that 2020 and 2021 cracked the top 5 lowest on record.

Precipitation Departure From Average This October
It's been a dry October with many locations nearly 1" to 2" below average for the month of October. The Twin Cities is closer to 2" below average, which is good enough for the 8th driest October on record so far.

Precipitation Departure From Average This Fall
If you look at the precipitation deficit for the season (since September 1st) the deficit is even greater. Many locations are well below average with the Twin Cities more than 4.50" below average, which is the 2nd driest September 1st through October 24rd on record.

Precipitation Departure From Average Since Jan. 1st
The Twin Cities is more than 9.60" below average for the year, which is good enough for the 18th driest start to any year on record. Meanwhile, International Fall, MN is more than 9.60" above average, which is good enough for the 2nd wettest start to any year on record.

Drought Update
It has been a dry year for many across central and southern MN. Extreme drought continues across parts of the Twin Cities to the Minnesota River Valley where rainfall deficits have been the greatest. It would be nice to get a good soaking prior to heading into winter, but it doesn't appear that anything substantial is on the way anytime soon.