River Ice Statement
Issued by NWS North Central River Forecast Center

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FIUS43 KMSR 091921
RVIMSR

NATIONAL WEATHER SERVICE
NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN
121 PM CST TUE JAN 9 2018

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

                ICE COVER CONDITIONS AS OF 01/09/18
*******************************************************************
MISSISSIPPI RIVER
COLD TEMPERATURES LAST WEEK WARMED UP THIS WEEKEND AND EARLY
THIS WEEK, BUT WILL COOL DOWN RAPIDLY AGAIN ON THURSDAY BEHIND A
STRONG COLD FRONT. ICE CONDITIONS ARE ABOUT THE SAME IN THE NORTH
AS LAST WEEK WHILE SOME ICE MELTED IN THE SOUTH.

ICE WAS REPORTED ON THE MISSISSIPPI RIVER TODAY FROM LOCK AND DAM
2 TO LD13 WITH COVERAGES OF 20 TO 100 PERCENT AND THICKNESSES OF
3 TO 16 INCHES. LD14 TO LD27 REPORTED 30 TO 100 PERCENT ICE
COVERAGE WITH THICKNESSES OF 2 TO 6 INCHES.  VIIRS SATELLITE
IMAGERY FROM YESTERDAY INDICATED 90 TO 100 PERCENT ICE
CONCENTRATION FROM THE TWIN CITIES TO LD19.  CLOUDS PREVENTED A
VIEW DOWNSTREAM OF LD19. WEBCAMS TODAY SHOWED A LOT OF ICE MOVING
THROUGH THE MISSISSIPPI RIVER AT ST LOUIS AND THROUGH THE MISSOURI
RIVER AT HERMANN.

ILLINOIS RIVER SYSTEM (CHICAGO/ILLINOIS R)
THE ILLINOIS RIVER WAS 70 TO 100 ICE COVERED TODAY WITH
THICKNESSES OF 2 TO 10 INCHES.  THE EXCEPTIONS WERE LOCKPORT WITH
OPEN WATER AND A WATER TEMPERATURE OF 41 DEGREES, AND BRANDON ROAD
WITH A WATER TEMPERATURE OF 33 DEGREES.  REPORTS YESTERDAY FROM
THE TRIBUTARIES INDICATED A VARIETY OF ICE CONDITIONS FROM MELTING
TO FORMING AND COVERAGES OF 30 TO 100 PERCENT. VIIRS SATELLITE
IMAGERY FROM YESTERDAY INDICATED 90 TO 100 PERCENT ICE
CONCENTRATION FROM CHICAGO TO THE RICE LAKE STATE FISH AND WILDLIFE
AREA (DOWNSTREAM OF KINGSTON MINES).  CLOUDS PREVENTED A VIEW
DOWNSTREAM OF THERE.

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 01/09/2018:
SEE THE COMMENTS ABOVE FOR DETAILS.

OUTLOOK FOR NEXT 7 DAYS:
ABOVE NORMAL AIR TEMPERATURES THIS WEEK WILL COOL DOWN RAPIDLY
ON THURSDAY-FRIDAY AND STAY BELOW NORMAL THROUGH EARLY NEXT WEEK.

IN THE NORTH...HIGHS ABOVE FREEZING TODAY AND TOMORROW WILL COOL
DOWN TO ZERO TO 20 ABOVE ON THURSDAY, AND RANGE FROM ZERO TO 5
ABOVE ON FRIDAY THROUGH EARLY NEXT WEEK. LOWS AROUND 32 TONIGHT
WILL DROP TO 5 TO 25 DEGREES ON WEDNESDAY NIGHT AND TO -5 TO -15
DEGREES ON THURSDAY NIGHT THROUGH EARLY NEXT WEEK.

IN THE SOUTH...HIGHS IN THE 40S AND 50S TODAY AND TOMORROW WILL
COOL DOWN TO THE 30S ON FRIDAY AND INTO THE 20S ON SATURDAY
THROUGH EARLY NEXT WEEK. LOWS WILL BE IN THE 30S TONIGHT, 50S
TOMORROW NIGHT,30S ON THURSDAY NIGHT, AND IN THE SINGLE DIGITS
AND TEENS ON FRIDAY NIGHT THROUGH EARLY NEXT WEEK.

IN OUR REGION...LOW TEMPERATURES THIS MORNING WERE 21 DEGREES
IN ST CLOUD, 26 DEGREES IN THE TWIN CITIES, 20 DEGREES IN
DUBUQUE, 25 DEGREES IN MOLINE, 28 DEGREES AT LD19, 27
DEGREES IN PEORIA, AND 30 DEGREES IN ST LOUIS.

BASED ON THESE FACTORS...LITTLE CHANGE IN ICE COVER IS EXPECTED
IN THE NORTH TODAY AND TOMORROW.  THAT WILL CHANGE BEHIND THE
PASSAGE OF THE COLD FRONT. AFTER THAT, ICE SHOULD FORM AND
THICKEN AT A RAPID PACE ON FRIDAY THROUGH EARLY NEXT WEEK.

IN THE SOUTH, ICE SHOULD CONTINUE DISSIPATING THIS WEEK AND THEN
RESUME FORMING AND THICKENING THIS WEEKEND AND EARLY NEXT WEEK.

 THE NEXT ICE STATEMENT WILL BE RELEASED ON TUESDAY..JAN 16 2018.

...BSITES...

$$



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