International Lake Superior Board of Control

Semi-Annual Progress Reports:


Publications 16 Results

Semi-Annual Progress Report covering the period from March 1, 2017 to August 31, 2017
International Lake Superior Board of Control (ILSBC)
2017/08/31

From March through August, the monthly mean water levels of Lake Superior ranged from 15 to 25 cm (5.9 to 9.8 in.) above average, and ranged from 7 cm (2.8 in.) lower to 8 cm (3.1 in.) higher than in 2016. In the past six months, monthly mean Lake Michigan-Huron levels ranged from 23 to 45 cm (9.1 to 17.7 in.) above average. Lake Michigan-Huron ranged from 11 cm (4.3 in.) lower to 18 cm (7.1 in.) higher than in 2016.

Semi-Annual Progress Report covering the period from September 1, 2016 to February 28, 2017
International Lake Superior Board of Control (ILSBC)
2017/02/28

From September 2016 through February 2017, the monthly mean water levels of Lake Superior ranged from 13 to 17 cm (5 to 7 in) above average, and from 8 cm (3 in) below to 8 cm (3 in) above last year’s levels. The monthly mean levels of Lake Michigan-Huron were also above average throughout the reporting period, ranging from 18 to 28 cm (7 to 11 in) above average, and from 10 cm (4 in) below to 11 cm (4 in) above the levels of the same period last year.

Semi-Annual Progress Report covering the period from March 1, 2016 to August 31, 2016
International Lake Superior Board of Control (ILSBC)
2016/08/31

This semi-annual report covers the Board's activities from 1 March to 31 August 2016. From March through August, the monthly mean water levels of Lake Superior ranged from 14 to 23 cm (5.5 to 9.1 in.) above average, and ranged from 3 cm (1.2 in.) lower to 4 cm (1.6 in.) higher than in 2015. In the past six months, monthly mean Lake Michigan-Huron levels ranged from 27 to 39 cm (10.6 to 15.4 in.) above average. Lake Michigan-Huron ranged from 10 to 24 cm (3.9 to 9.4 in.) higher than in 2015.

Semi-Annual Progress Report covering the period from September 1, 2015 to February 29, 2016
International Lake Superior Board of Control (ILSBC)
2016/04/25

This semi-annual report covers the Board's activities from 1 September 2015 to 29 February 2016. From September 2015 through February 2016, the monthly mean water levels of Lake Superior
ranged from 9 to 23 cm (4 to 9 in) above average, and from 11 cm (4 in) below to 2 cm (0.8 in) above last year’s levels. The monthly mean levels of Lake Michigan-Huron were also above average throughout the reporting period, ranging from 15 to 29 cm (6 to 11 in) above average, and from 0 to 19 cm (0 to 7 in) above the levels of the same period last year.

Semi-Annual Progress Report covering the period from March 1, 2015 to August 31, 2015
International Lake Superior Board of Control (ILSBC)
2015/08/31

This semi-annual report covers the Board's activities from March 1, 2015 through August 31, 2015. From March through August, the monthly mean water levels of Lake Superior ranged from 15 to 20 cm (5.9 to 7.9 in.) above average, and ranged from 1 to 19 cm (0.4 to 7.5 in.) higher than in 2014. In the past six months, monthly mean Lake Michigan-Huron levels ranged from 12 to 19 cm (4.7 to 7.5 in.) above average. Daily mean levels have remained above average since 7 September 2014. Lake Michigan-Huron ranged from 24 to 53 cm (9.4 to 20.9 in.) higher than in 2014.

Semi-Annual Progress Report covering the period from September 25, 2014 to February 28, 2015
International Lake Superior Board of Control (ILSBC)
2015/04/29

This semi-annual report covers the Board's activities from 25 September 2014 to 28 February 2015. During the past six months, the water levels of Lake Superior were above average and have been 17 to 22 centimetres (cm) (7 to 9 inch (in)) higher than last year’s levels.  Lake Superior monthly mean water levels have consistently been above average since March 2014, which was the month that ended an almost 16-year period of near- or below-average monthly levels for the 1918-2013 period of record.

Semi-Annual Progress Report covering the period March 26, 2014 to September 24, 2014
International Lake Superior Board of Control (ILSBC)
2014/09/24

This semi-annual report covers the Board's activities from 26 March 2014 to 24 September 2014. From March through August, the monthly mean water levels of Lake Superior ranged from 1 to 16 cm (0.4 to 6.3 in.) above average, rose consistently throughout the reporting period, and ranged from 23 to 36 cm (9 to 14 in.) higher than in 2013. Prior to March of this year, the levels of Lake Superior had been consistently below average since May 2005, and near or below average since May 1998.

Semi-Annual Progress Report covering the period from September 20, 2013 to March 25, 2014
International Lake Superior Board of Control (ILSBC)
2014/03/25

This semi-annual report covers the Board's activities from 20 September 2013 to 25 March 2014. During the past six months, the water levels of Lake Superior were below average. Lake Superior monthly mean water levels have been consistently near or below average since May of 1998, which is the longest sustained period of below-average monthly water levels in the 1918-2013 period of record. The water levels were from 28 cm (11 in) above to 33 cm (13 in) above last year's levels during the reporting period.

Semi-Annual Progress Report covering the period from March 21, 2013 to September 19, 2013
International Lake Superior Board of Control (ILSBC)
2013/09/19

This semi-annual report covers the Board's activities from 21 March 2013 to 19 September 2013. From March through August, the monthly mean water levels of Lake Superior ranged from 9 to 34 cm (4 to 13 in) below average and ranged from 8 cm (3.1 in) lower to 17 cm (6.7 in) higher than in 2012. Lake Superior levels have been consistently below average since May of 2005, which is the longest sustained period of below-average monthly levels in the 1918-2012 record. Prior to inclusion of 2012 data (which lowered the long-term average values for some months), levels had been consistently below average since 1998.

Semi-Annual Progress Report covering the period from September 21, 2012, to March 20, 2013
International Lake Superior Board of Control (ILSBC)
2013/03/20

This semi-annual report covers the Board's activities from 21 September 2012 to 20 March 2013. During the past six months, the water levels of Lake Superior remained below average and have been 2 cm (1 in) above to 8 cm (3 in) below last year's levels. This past month, Lake Superior's level was 31 cm (12 in) below aveage. Lake Superior water levels have been consistently below average since May of 2005, which is the longest sustained period of below-average monthly levels in the 1918-2012 period of record.

Semi-Annual Progress Report covering the period from March 23, 2012, to September 20, 2012
International Lake Superior Board of Control (ILSBC)
2012/09/20

This semi-annual report covers the Board's activities from 23 March to 20 September 2012. From March through August, the water levels of Lake Superior remained below average but were 1 cm (0.4 in.) lower to 9 cm (4 in.) higher than in 2011. Monthly mean Lake Superior levels remained 21 to 30 cm (8 to 12 in.) below average. Lake Superior levels have been consistently below average since April of 1998, which is the longest sustained period of below-average monthly levels in the 1918-2011 record.

Semi-Annual Progress Report covering the period from August 31, 2011 to March 22, 2012
International Lake Superior Board of Control (ILSBC)
2012/03/22

This semi-annual report covers the Board's activities from 31 August 2011 to 22 March 2012. During the past six months, the water levels of Lake Superior remained below average and have been 1 to 2 centimetres (cm) (0 to 1 inch (in)) higher than last year’s levels, and they were 33 cm (13 in) below average last month. Lake Superior water levels have been consistently below average since April of 1998, which is the longest sustained period of below-average monthly levels in the 1918-2011 record.

Semi-Annual Progress Report covering the period from March 24, 2011 to August 30, 2011
International Lake Superior Board of Control (ILSBC)
2011/08/30

This semi-annual report covers the Board's activities from 24 March to 30 August 2011. From March through August, the water levels of Lake Superior remained below average. Levels were 22 cm (9 in.) lower than last year in March, but by August were 8 cm (3 in.) above those of 2010. Monthly mean Lake Superior levels remained 25 to 36 cm (10 to 14 in.) below average. Lake Superior levels have been consistently below average since April of 1998, which is the longest sustained period of below-average monthly levels in the 1918-2010 record.

Semi-Annual Progress Report covering the period from September 9, 2010 to March 23, 2011
International Lake Superior Board of Control (ILSBC)
2011/03/23

This semi-annual report covers the Board's activities from 9 September 2010 to 23 March 2011. During the past six months, the water levels of Lake Superior remained below average and have been 17 to 23 centimetres (7 to 9 inches) lower than last year’s levels, and were 34 cm (13 in.) below average last month. Lake Superior water levels have been consistently below average since April of 1998, which is the longest sustained period of below-average monthly levels in the 1918-2010 record.

Semi-Annual Progress Report covering the period from March 9, 2010 to September 8, 2010
International Lake Superior Board of Control (ILSBC)
2010/09/08

This semi-annual report covers the Board's activities from 9 March to 8 September 2010. During the past six months, the water levels of Lake Superior remained below average and have been the same as to 17 cm (7 in.) lower than last year’s levels, and last month were 19 cm (7 in.) below the year before. Monthly mean Lake Superior levels had moved to within 11 cm (4 in.) of average by December 2009, but now lie 34 cm (13 in.) below average. Lake Superior levels have been consistently below average since April of 1998, which is the longest sustained period of below-average monthly levels in the 1918-2009 record.

Semi-Annual Progress Report covering the period from September 18, 2009 to March 8, 2010
International Lake Superior Board of Control (ILSBC)
2010/03/08

This semi-annual report covers the Board's activities from September 18, 2009 to March 8, 2010. During the past six months, the water levels of lakes Superior and Michigan-Huron remained below average but were higher than comparable levels last year. The level of Lake Superior has been consistently below average since April of 1998, which is the longest sustained period of below-average monthly levels in the 1918-2008 period of record. The level of Lakes Michigan-Huron has been below average since January of 1999, the second longest period on record of consistently below average levels.