US Army Corps of Engineers
Detroit District Website

Quick Links

Redirecting...

Weekly Forecast

ARMY CORPS OF ENGINEERS WEEKLY GREAT LAKES WATER LEVEL UPDATE

Mar 27, 2020

 

       

WEATHER CONDITIONS

Temperatures last Friday started out unseasonably warm, as the southern half of the basin experienced high temperatures in the 60s and 70s degrees Fahrenheit. But as Friday wore on, temperatures dropped substantially, and by Saturday, daily high temperatures were near freezing in many areas. For example, the daily high temperature in Erie, PA, went from 70°F on Friday to 32°F on Saturday.  Temperatures remained around 5-15 degrees below average through Sunday. On Monday and Tuesday, moderate temperatures prevailed and many areas of the region saw high temperatures in the high 50s/low 60s on Wednesday. A storm system brought snow to the region on Sunday and Monday, with Syracuse, NY, receiving about 6 inches. This weekend and early next workweek, temperatures will generally be near normal for early spring. Most of the region is predicted to experience rain on Saturday, but areas within the Lake Superior region may receive snowfall.

LAKE LEVEL CONDITIONS

The water levels for the Great Lakes for March 27th are forecasted to be above what they were at this time last year, except for Lake Superior, which is an inch below its level of a year ago. Moreover, forecasted water levels for March 27th on Lakes Michigan-Huron, St. Clair, and Erie are 2 to 5 inches above their record-high monthly average March level. Over the past 30 days, Lake Superior’s water level fell 3 inches, while the water levels of Lakes St. Clair, Erie, and Ontario climbed by 2 to 5 inches. Forecasted water levels for March 27th are well above their average March levels across all of the lakes. In a month’s time, Lakes Superior, Michigan-Huron, St. Clair, and Erie are forecast to be higher than their current levels by 3, 4, 5, and 3 inches, respectively, whereas Lake Ontario is predicted to be 8 inches higher. See our Daily Levels web page for more water level information.

FORECASTED MONTHLY OUTFLOWS/CHANNEL CONDITIONS

Lake Superior’s outflow into the St. Marys River is forecasted to be above average this month. Lake Michigan-Huron’s outflow into the St. Clair River and Lake St. Clair’s outflow through the Detroit River are predicted to be above average for March. In addition, Lake Erie’s outflow into the Niagara River and Lake Ontario’s outflow into the St. Lawrence River are projected to be above average for March.  Water levels and flows in the connecting channels can be significantly impacted by ice during the winter months.

ALERTS

Water levels shown are still-water surface elevations over the entire lake surface. Water levels at specific locations may differ substantially due to meteorological influences. Official records are based on monthly average water levels and not daily water levels. Users of the Great Lakes, connecting channels and St. Lawrence River should keep informed of current conditions before undertaking any activities that could be affected by changing water levels. Mariners should utilize navigation charts and refer to current water level readings. High water levels and potentially record high water levels are expected to persist for at least the next six months, so flood prone areas are expected to remain vulnerable. Ice information can be found at the National Ice Center’s website.

SUPERIOR

MICH-HURON

ST. CLAIR

ERIE

ONTARIO

Forecasted Water Level for Mar 27, 2020 (feet)

602.17

581.50

576.90

574.11

246.75

Chart Datum (feet)

601.10

577.50

572.30

569.20

243.30

Difference from chart datum (inches)

+13

+48

+55

+59

+41

Difference from average water level for Feb 27, 2020 (inches*)

-3

+2

+3

+4

+5

Difference from average water level for Mar 27, 2019 (inches*)

-1

+14

+11

+12

+9

 

Difference from long-term monthly average of Mar (inches)

+12

+37

+37

+36

+21

Difference from highest monthly average of record for Mar (inches)

-3

+5

+2

+4

-6

Year of highest recorded monthly mean

1986

1986

1986

1986

1952

Difference from lowest monthly average of record for Mar (inches)

+31

+65

+70

+70

+50

Year of lowest recorded monthly mean

1926

1964

1934

1934

1935

 

Projected net change in levels by Apr 27, 2020 (inches)

+3

+4

+5

+3

+8

ALL DATA SHOWN IN THIS SUMMARY ARE REFERENCED TO IGLD 1985

*VALUES FOR SPECIFIC DAY ARE BASED ON 3-DAY DAILY AVERAGE AROUND SPECIFIED DATE

LONG TERM AVERAGE PERIOD OF RECORD, 1918-2019

FORECASTED INFORMATION PROVIDED BY

RECORDED DATA (1918 – present)

FOR MORE INFORMATION VISIT

Department of the Army

provided by

Detroit District Great Lakes Homepage

Detroit District, Corps of Engineers

NOAA Center for Operational Oceanic Products and Services

International Joint Commission

Detroit District Home

 

1-888-694-8313 ext. 1

 

Great Lakes Information Network

                       

 

Weekly Great Lakes Water Levels

We do not have the ability to offer email updates at this time.  The Weekly Forecast of Great Lakes Water Levels is updated each week on Thursday afternoon or Friday morning depending on data availability.

Click here for a printer friendly version.

Detroit District Disclaimer

NOTICE: All data contained herein is preliminary in nature and therefore subject to change. The data is for general information purposes ONLY and SHALL NOT be used in technical applications such as, but not limited to, studies or designs. All critical data should be obtained from and verified by the United States Army Corps of Engineers, Detroit District, Engineering and Technical Services, Great Lakes Hydraulics and Hydrology Office, 477 Michigan Ave., Detroit, MI 48226. The United States of America assumes no liability for the completeness or accuracy of the data contained herein and any use of such data inconsistent with this disclaimer shall be solely at the risk of the user.