River Ice Statement
Issued by NWS North Central River Forecast Center

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FIUS43 KMSR 231659
RVIMSR

NATIONAL WEATHER SERVICE
NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN
1100 AM CST TUE DEC 23 2014

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

                ICE COVER CONDITIONS AS OF 12/23/14
*******************************************************************
MISSISSIPPI RIVER
THE ICE WAS BREAKING UP AT ST ANTHONY FALLS MN UPPER LOCK WITH
AN ICE THICKNESS OF 1 INCH AND 10 PERCENT COVERAGE.  NO ICE WAS
REPORTED AT ST ANTHONY FALLS LOWER LOCK DOWNSTREAM THROUGH LOCK
AND DAM 3.  LD4...LD5...AND LD6 REPORTED 10 PERCENT COVERAGE AND
AN INCH OF ICE THICKNESS...WHILE LD5A REPORTED NO ICE. LD7 ALSO
REPORTED NO ICE.

LD8 DOWNSTREAM THROUGH LD12 REPORTED 40 TO 80 PERCENT ICE COVERAGE
WITH THICKNESSES RANGING FROM 2 TO 5 INCHES.  SOME OF THE ICE WAS
ROTTEN AND BREAKING UP.  NO ICE WAS REPORTED AT LD10 OR DOWNSTREAM
OF LD13.

WATER TEMPERATURES WERE 32 TO 35 DEGREES FROM MINNEAPOLIS TO LOCK
AND DAM 18...AND 36 TO 43 DEGREES FROM LD19 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 43 DEGREES...EXCEPT 55 DEGREES AT LOCKPORT LOCK AND 51 DEGREES
AT BRANDON ROAD.

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 12/23/14:
SEE THE COMMENTS ABOVE FOR DETAILS.

OUTLOOK FOR NEXT 7 DAYS:
AIR TEMPERATURES WERE NEAR TO ABOVE NORMAL OVER THE PAST WEEK AND
SOME MORE ICE WAS MELTED IN THE MISSISSIPPI RIVER.  STREAMFLOWS
ARE NEAR NORMAL TO MUCH ABOVE NORMAL DUE TO RAIN AND MELTING SNOW
OVER THE PAST WEEK.

AIR TEMPERATURES ARE FORECAST TO BE A LITTLE ABOVE NORMAL THIS
WEEK DROPPING TO BELOW NORMAL THIS WEEKEND THROUGH NEXT WEEK...
WITH BELOW NORMAL PRECIPITATION.

IN OUR REGION...LOW TEMPERATURES THIS MORNING WERE 36 DEGREES IN
ST CLOUD MN...34 IN THE TWIN CITIES...40 DEGREES AT ROCK ISLAND...
AND 41 AT ST LOUIS.

HIGH AIR TEMPERATURES THIS WEEK SHOULD BE IN THE 30S IN THE NORTH
AND 40S IN THE SOUTH..WITH LOWS GENERALLY IN THE 20S IN THE NORTH.
AIR TEMPERATURES WILL DROP THIS WEEKEND WITH HIGHS IN THE TEENS
IN THE NORTH AND 30S SOUTH.  LOWS WILL BE IN THE SINGLE DIGITS THIS
WEEKEND IN THE NORTH...AND COULD GET EVEN COLDER LATER NEXT WEEK.

BASED ON THESE FACTORS...ICE SHOULD CONTINUE TO MELT AND BREAK UP
THIS WEEK. ICE SHOULD START TO RE-DEVELOP IN THE NORTH THIS WEEKEND
THROUGH NEXT WEEK.  WE PROBABLY WILL NOT SEE ANY NEW ICE DOWNSTREAM
OF ABOUT LD15.  THE COMBINATION OF HIGHER STREAMFLOWS AND
COLDER TEMPERATURES THIS WEEKEND THRU NEXT WEEK COULD LEAD TO
INCREASED DEVELOPMENT OF FRAZIL ICE IN THE NORTHERN TRIBUTARIES
AS WELL AS THE MAINSTEM MISSISSIPPI RIVER.

THE NEXT ICE STATEMENT WILL BE RELEASED ON TUESDAY..DEC 30 2014.

...BSITES...

$$



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