River Ice Statement
Issued by NWS North Central River Forecast Center

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FIUS43 KMSR 112154
RVIMSR

NATIONAL WEATHER SERVICE
NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN
354 PM CST TUE DECEMBER 11 2018

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

                ICE COVER CONDITIONS AS OF 12/11/18
*******************************************************************
MISSISSIPPI RIVER
AIR TEMPERATURES WERE ABOUT 5 DEGREES BELOW NORMAL OVER THE PAST
WEEK WITH FAIRLY CALM WINDS. WE HAD ICE FORMATION AND GROWTH
DOWNSTREAM TO LOCK AND DAM 13.

ICE REPORTS FROM THE US ARMY CORPS OF ENGINEERS IN ST PAUL THIS
MORNING SHOWED 40 TO 100 PERCENT ICE COVERAGE FROM LD1 TO LD12
WITH ICE THICKNESSES OF 1 TO 4 INCHES.  LD13 REPORTED 10 PERCENT
COVERAGE WITH ICE 2 INCHES THICK. VIIRS SATELLITE IMAGERY FROM
DECEMBER 9TH INDICATED PRETTY SOLID ICE COVERAGE FROM LD1 TO
AROUND LD8 AND SOME ICE DOWN TO AROUND LD15

WATER TEMPERATURES RANGED FROM 32 TO 33 DEGREES FROM LD14 TO LD22
AND FROM 39 TO 40 DEGREES FROM LD24 TO 27.

ILLINOIS RIVER SYSTEM (CHICAGO/ILLINOIS R)
NO ICE HAS BEEN REPORTED ON THE ILLINOIS RIVER YET.  REPORTS
FROM THE NWS OFFICE IN CHICAGO INDICATED THAT ICE IS FORMING
ON THE DES PLAINES AND FOX RIVERS. WATER TEMPERATURES WERE IN
THE 30S EXCEPT FOR 49 DEGREEES 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 12/11/2018:
SEE THE COMMENTS ABOVE FOR DETAILS.

OUTLOOK FOR NEXT 7 DAYS:
THE SLOW WARMING TREND SHOULD CONTINUE THROUGH NEXT WEEK WITH
TEMPERATURES AVERAGING ABOVE NORMAL.  IT SHOULD BE MOSTLY DRY
OVER THE NEXT WEEK EXCEPT FOR SOUTHERN MISSOURI AND ILLINOIS WHERE
SOME LIGHT TO MODERATE RAIN IS EXPECTED ON THURSDAY AND FRIDAY.

IN THE NORTH...HIGH TEMPERATURES WILL BE MOSTLY IN THE 20S AND 30S
WITH LOWS MOSTLY IN THE TEENS AND 20S.

IN THE SOUTH...HIGHS WILL BE MOSTLY IN THE 30S AND 40S WITH LOWS
IN THE 20S AND 30S.

IN OUR REGION...LOW TEMPERATURES TODAY WERE 6 DEGREES IN ST CLOUD,
12 DEGREES IN THE TWIN CITIES, 18 DEGREES IN DUBUQUE, 26 DEGREES
IN MOLINE, 20 DEGREES IN PEORIA, 17 DEGREES AT LD19, AND 24
DEGREES IN ST LOUIS.

BASED ON THESE FACTORS...CONTINUED SLOW ICE FORMATION AND GROWTH
IS LIKELY IN THE NORTH THROUGH NEXT WEEK, OR LITTLE CHANGE.
NO ICE IS EXPECTED TO FORM IN THE SOUTH.

THE NEXT RIVER ICE STATEMENT WILL BE ISSUED ON TUESDAY
DECEMBER 18, 2018.

...BSITES...

$$


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