River Ice Statement
Issued by NWS North Central River Forecast Center

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FIUS43 KMSR 171735
RVIMSR

NATIONAL WEATHER SERVICE
NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN
1134 AM CST TUE JAN 17 2017

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

                ICE COVER CONDITIONS AS OF 1/17/2017
*******************************************************************
MISSISSIPPI RIVER

ICE GOT A LITTLE THICKER, IN GENERAL, OVER THE PAST WEEK WITH
SEASONAL TEMPERATURES IN THE MIDWEST.

LOCK AND DAMS 1 THROUGH 15 REPORTED 70 TO 100 PERCENT ICE COVERAGE
TODAY WITH THICKNESSES OF 5 TO 14 INCHES.  LD16 THROUGH LD24
REPORTED 10 TO 100 PERCENT COVERAGE WITH ICE THICKNESSES OF 4 TO
9 INCHES.  NO ICE WAS REPORTED AT LD25 TO LD27.  IT WAS TOO CLOUDY
IN THE PAST FEW DAYS FOR VIIRS SATELLITE IMAGERY TO SHOW ICE
CONDITIONS. THE IMAGERY CAN BE FOUND AT
REALEARTH.SSEC.WISC.EDU/?PRODUCTS=RVER-ICEC-NC

WATER TEMPERATURES WERE 31 TO 33 DEGREES EXCEPT FOR 38 TO 41
DEGREES FROM LD24 THROUGH LD26.

ILLINOIS RIVER SYSTEM (CHICAGO/ILLINOIS R)

THOMAS J O`BRIEN LOCK REPORTED 50 PERCENT ICE COVERAGE WITH ICE 5
INCHES THICK.  MARSEILLES LD REPORTED 50 PERCENT ICE COVERAGE WITH
ICE 2 INCHES THICK. PEORIA LD REPORTED 10 PERCENT COVERAGE WITH
ICE 2 INCHES THICK.  THE TRIBUTATIES TO THE ILLINOIS WERE 40 TO
100 PERCENT ICE COVERED WITH ICE STARTING TO BREAK UP IN A FEW
LOCATIONS.

WATER TEMPERATURES WERE IN THE 30S EXCEPT FOR 41 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:::::
*******************************************************************

ICE FACTORS AS OF 1/17/2017:

OUTLOOK FOR NEXT 7 DAYS:

AIR TEMPERATURES WILL BE MUCH ABOVE NORMAL FOR THE NEXT WEEK
OR TWO.

IN THE NORTH...HIGHS WILL BE IN THE 30S AND 40S WITH LOWS IN
THE 20S FOR THE NEXT TWO NIGHTS THEN IN THE 30S.

IN THE SOUTH...HIGHS WILL BE IN THE 40S AND 50S WITH LOWS IN THE
30S AND 40S.

IN OUR REGION...LOW TEMPERATURES THIS MORNING WERE 21 DEGREES AT
ST CLOUD, 30 DEGREES IN THE TWIN CITIES, 33 DEGREES IN THE QUAD
CITIES, 41 DEGREES AT PEORIA, AND 44 DEGREES AT ST LOUIS.

BASED ON THESE FACTORS...WE SHOULD SEE LITTLE CHANGE IN ICE
CONDITIONS IN THE NORTH FOR THE NEXT FEW DAYS THEN ICE SHOULD
START TO DECAY AND CONTINUE TO SLOWLY MELT THROUGH THE WEEKEND
AND INTO NEXT WEEK. ICE SHOULD CONTINUE TO DECAY AND BREAK UP
IN THE SOUTH.

THE RISK FOR FLOODING DUE TO BREAK-UP ICE JAMS WILL RISE
THROUGHOUT THE WEEK AND INTO NEXT WEEK. ICE JAMMING IS MOST
LIKELY WHERE THERE ARE OBSTRUCTIONS IN THE RIVER OR DECREASES
IN SLOPE.

THE NEXT RIVER ICE STATEMENT WILL BE ISSUED ON TUESDAY
JANUARY 24, 2017.

...BSITES...

$$



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