River Ice Statement
Issued by NWS North Central River Forecast Center

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1
000
FIUS43 KMSR 241634
RVIMSR

NATIONAL WEATHER SERVICE
NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN
1035 AM CST TUE FEB 24 2015

...MISSISSIPPI RIVER AND ILLINOIS RIVER ICE STATEMENT...

                ICE COVER CONDITIONS AS OF 02/24/15
*******************************************************************
MISSISSIPPI RIVER

WE PICKED UP MORE ICE IN THE PAST WEEK UNDER ARCTIC HIGH PRESSURE
AND BELOW NORMAL TEMPERATURES. ICE JAMS WERE STILL COMMON IN MANY OF
THE TRIBUTARIES TO THE MISSISSIPPI RIVER.

ICE WAS REPORTED FROM ST ANTHONY FALLS MN UPPER LOCK TO LOCK AND DAM
27 (CHAIN OF ROCKS) WITH COVERAGES RANGING FROM 40 TO 100 PERCENT
AND THICKNESSES OF 3 TO 20 INCHES.  THE HEAVIEST ICE WAS FROM LD4
TO LD13 WITH 100 PERCENT COVERAGE AND THICKNESSES OF 10 TO 20 INCHES.
ICE COVERAGE WAS A LITTLE MORE VARIABLE FROM LD14 TO LD27 WITH
THICKNESSES OF 4 TO 10 INCHES AND COVERAGES RANGING FROM 40 TO
100 PERCENT.  AN EXCEPTION WAS LD3 WITH ONLY 3 INCHES OF ICE AND 50
PERCENT COVERAGE.

WATER TEMPERATURES WERE 31 TO 33 DEGREES EVERYWHERE EXCEPT FOR
36 AT LD3...34 DEGREES AT LD24 AND 37 DEGREES AT MEL PRICE.

THE FIRST ICE MEASUREMENTS AT LAKE PEPIN (LD3 TO LD4) FOR 2015
WERE TAKEN ON FEB 18. THE SURVEY SHOWED LAKE PEPIN WITH 12 TO 21
INCHES OF ICE FROM MILE 765 TO 780 AND 6 TO 9 INCHES FROM MILE
781 TO 782.

ILLINOIS RIVER SYSTEM (CHICAGO/ILLINOIS R)

ICE COVERAGE WAS 100 PERCENT AT THOMAS J OBRIEN LOCK WITH ICE 4
INCHES THICK. MARSEILLES LD WAS 100 PERCENT ICE COVERED WITH ICE 4
INCHES THICK.  PEORIA LOCK AND DAM REPORTED 80 PERCENT ICE COVERAGE
WITH 5 INCHES OF ICE.  NO REPORT WAS RECEIVED FROM LAGRANGE LD.
NO ICE WAS REPORTED AT LOCKPORT...BRANDON ROAD...DRESDEN ISLAND OR
STARVED ROCK.

WATER TEMPERATURES WERE 32 TO 35 DEGREES EXCEPT FOR 46 DEGREES
AT LOCKPORT LOCK AND 42 DEGREES AT BRANDON ROAD.

REPORTS INDICATE THAT ICE WAS STABLE OR WAS CONTINUING TO DEVELOP
AND THICKEN ON THE RIVERS IN ILLINOIS WITH COVERAGES RANGING FROM
20 TO 100 PERCENT. THESE RIVERS INCLUDED...DU PAGE...FOX...
IROQUOIS...KANKAKEE...AND THE ROCK. THE DATA SOURCE FOR THESE
REPORTS WAS AT WWW.WEATHER.GOV/LOT UNDER RIVERS AND LAKES.

DATA SOURCE: US ARMY CORPS OF ENGINEERS LOCK STATUS REPORT AT
 HTTP://CORPSLOCKS.USACE.ARMY.MIL/LPWB/F?P=121:4:0:::::
*******************************************************************

CURRENT CONDITIONS AS OF 02/24/15:
SEE THE COMMENTS ABOVE FOR DETAILS.

OUTLOOK FOR NEXT 7 DAYS:

A COLD FRONT WILL SWEEP ACROSS THE MIDWEST TODAY FOLLOWED BY
ARCTIC HIGH PRESSURE.  THE HIGH WILL MOVE EAST AND ALLOW WINDS
TO SHIFT TO THE SOUTH ON SATURDAY.  BUT ANOTHER COLD FRONT IS
EXPECTED TO MOVE ACROSS THE MIDWEST ON SUNDAY FOLLOWED BY ANOTHER
ONE LATER NEXT WEEK. TEMPERATURES WILL MODERATE A LITTLE WHEN
THE WINDS ARE FROM THE SOUTH THIS WEEKEND.

IN GENERAL...AIR TEMPERATURES WILL BE 10 TO 20 DEGREES BELOW
NORMAL THROUGH NEXT WEEK. LOWS WILL BE BELOW ZERO IN THE
NORTH TONIGHT THROUGH SATURDAY AND IN THE SINGLE DIGITS THIS
WEEKEND AND EARLY NEXT WEEK.  IN THE SOUTH..LOWS WILL BE IN THE
TEENS TONIGHT AND TOMORRW...SINGLE DIGITS FRIDAY AND SATURDAY AND
IN THE 20S ON SUNDAY AND MONDAY.  ABOVE FREEZING TEMPERAURES
WILL BE LIMITED TO MISSOURI AND ILLINOIS ON SUNDAY-MONDAY.

STREAMFLOWS ARE NEAR NORMAL TO ABOVE NORMAL DUE TO RAIN AND
SNOWMELT IN DECEMBER...THE TWO-WEEK JANUARY THAW...AND SNOWMELT
FROM TWO WEEKS AGO.

MOSTLY LIGHT PRECIPITATION IS EXPECTED OVER THE MIDWEST FOR THE NEXT
7 DAYS...WITH HEAVIER PRECIP EXPECTED FOR SOUTHERN MISSOURI AND
ILLINOIS EARLY NEXT WEEK.

IN OUR REGION...LOW TEMPERATURES THIS MORNING WERE 20 DEGREES IN
ST CLOUD MN...19 IN THE TWIN CITIES...10 AT LA CROSSE...5 AT ROCK
ISLAND...0 DEGREES AT LD20...AND 11 DEGREES AT ST LOUIS.

BASED ON THESE FACTORS...ICE WILL CONTINUE TO DEVELOP AND THICKEN
THROUGH NEXT WEEK. ICE PRODUCTION SHOULD SLOW DOWN IN THE SOUTH
THIS WEEKEND AND EARLY NEXT WEEK.

THE THREAT OF ICE JAMS WILL CONTINUE THROUGH NEXT WEEK.

THE NEXT ICE STATEMENT WILL BE RELEASED ON TUESDAY..MAR 3 2015.

...BSITES...

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.