River Ice Statement
Issued by NWS North Central River Forecast Center

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FIUS43 KMSR 161648
RVIMSR

NATIONAL WEATHER SERVICE
NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN
1048 AM CST TUE DEC 16 2014

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

                ICE COVER CONDITIONS AS OF 12/16/14
*******************************************************************
MISSISSIPPI RIVER
AT ST ANTHONY FALLS MN UPPER LOCK THE ICE WAS BREAKING UP AND WAS 2
INCHES THICK WITH A COVERAGE OF 20 PERCENT. NO ICE WAS REPORTED AT
ST ANTHONY FALLS LOWER LOCK DOWNSTREAM TO LD4.  THERE WAS A LITTLE
ICE LEFT AT LD5. FROM LD6 THROUGH LD11 THE ICE WAS GENERALLY 2 TO 4
INCHES THICK AND WAS BREAKING UP AND ROTTING...WITH COVERAGE OF 50
TO 90 PERCENT. NO ICE WAS REPORTED DOWNSTREAM OF LD11.

WATER TEMPERATURES WERE 32 TO 36 DEGREES FROM MINNEAPOLIS TO LOCK
AND DAM 15...36 TO 38 DEGREES FROM LD16 TO LD22...AND 38 TO 45 DEGREES
FROM LD24 TO LD27.

ILLINOIS RIVER SYSTEM (CHICAGO/ILLINOIS R)
NO ICE HAS BEEN REPORTED ON THE ILLINOIS...BUT HAS BEEN REPORTED
IN SEVERAL OF THE TRIBUTARIES.  WATER TEMPERATURES RANGED FROM 37
TO 44 DEGREES...EXCEPT 55 DEGREES AT LOCKPORT LOCK.

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 12/16/14:
SEE THE COMMENTS ABOVE FOR DETAILS.

OUTLOOK FOR NEXT 7 DAYS:
AIR TEMPERATURES AND DEW POINTS WERE WELL ABOVE NORMAL FROM
FRIDAY OF LAST WEEK THROUGH YESTERDAY...AND IT RAINED OVER
MUCH OF THE UPPER MIDWEST. THAT MELTED A LOT OF SNOW AND
ICE. THIS COMBINATION IS ADDING SOME VOLUME TO THE RIVERS AND IS
HELPING TO BREAK UP ANY REMAINING ICE. IT IS ALSO PRODUCING
NEW FRAZIL ICE IN SOME OF THE NORTHERN TRIBUTARIES.

AIR TEMPERATURES SHOULD BE NEAR NORMAL TO A LITTLE ABOVE NORMAL
THIS WEEK AND NEXT. IN OUR REGION...LOW TEMPERATURES THIS MORNING
WERE 20 DEGREES IN ST CLOUD MN...23 IN THE TWIN CITIES...AND 41
DEGREES AT ROCK ISLAND AND ST LOUIS.

AIR TEMPERATURES SHOULD REMAIN BELOW FREEZING FOR THE NEXT WEEK
NORTH OF ABOUT ROCK ISLAND...WITH LOW TEMPERATURES IN THE TEENS
AND LOW 20S.  HIGH TEMPERATURES SOUTH OF THERE SHOULD BE IN THE
30S AND LOW 40S. AT THIS TIME WE ARE NOT SEEING ANY BIG ARCTIC
OUTBREAKS FOR THE NEXT 10 DAYS.

BASED ON THESE FACTORS...ICE DEVELOPMENT AND GROWTH SHOULD
RESUME NORTH OF ABOUT LD15 THIS WEEK INTO NEXT WEEK. WE PROBABLY
WILL NOT SEE ANY NEW ICE DOWNSTREAM OF ABOUT LD17 OR LD18.

THE NEXT ICE STATEMENT WILL BE RELEASED ON TUESDAY..DEC 23 2014.

...BSITES...

$$



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