Extended Streamflow Guidance
Issued by NWS

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000
FGUS63 KMSR 261712
ESGMIS

MISSISSIPPI RIVER FROM LOCK AND DAM 20 AT CANTON..MISSOURI
TO CHESTER..ILLINOIS
LONG-RANGE PROBABILISTIC OUTLOOK
NATIONAL WEATHER SERVICE
NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN
1211 PM CDT TUE MAR 26 2024

IN TABLE 1 BELOW...THE CURRENT (CS) AND HISTORICAL (HS) OR NORMAL
PROBABILITIES OF EXCEEDING MINOR...MODERATE...AND MAJOR FLOOD STAGES
ARE LISTED FOR THE VALID TIME PERIOD.

CS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY
BASED ON CURRENT CONDITIONS.

HS VALUES INDICATE THE PROBABILITY OF REACHING A FLOOD CATEGORY
BASED ON HISTORICAL OR NORMAL CONDITIONS.

WHEN THE VALUE OF CS IS MORE THAN HS...THE PROBABILITY OF
EXCEEDING THAT LEVEL IS HIGHER THAN NORMAL. WHEN THE VALUE OF CS IS
LESS THAN HS...THE PROBABILITY OF EXCEEDING THAT LEVEL IS LOWER
THAN NORMAL.


:...TABLE 1--PROBABILITIES FOR MINOR...MODERATE AND MAJOR FLOODING...
                   VALID PERIOD: 04/01/2024 - 06/30/2024

                                    : CURRENT AND HISTORICAL CHANCES
                                    : OF EXCEEDING FLOOD CATEGORIES
                                    :       AS A PERCENTAGE(%)
                     CATEGORICAL    :
                  FLOOD STAGES (FT) :   MINOR    MODERATE   MAJOR
LOCATION          MINOR  MOD  MAJOR :  CS   HS   CS   HS   CS   HS
--------          ----- ----- ----- : ---- ---- ---- ---- ---- ----
:Mississippi River
CANM7            15.0   20.0   25.0    28   64   <5   15   <5   <5
LGRM7            17.0   23.0   25.0    20   54   <5   10   <5   <5
UINI2            19.0   22.0   26.0    21   56    9   30   <5   10
QLDI2            18.0   21.0   25.0    21   56    9   26   <5   10
HNNM7            17.0   22.0   24.0    31   63    7   14   <5   10
SVRM7            16.0   20.0   24.0    38   67   12   40   <5   11
LUSM7            15.0   20.0   25.0    47   76   10   35   <5    8
CLKM7            25.0   31.0   33.0    48   76    8   28    6   13
CAGM7            26.0   30.0   34.0    40   71   13   43   <5   10
GRFI2            20.0   24.0   29.0    30   67    9   19   <5   10
ALOI2            21.0   24.0   31.0     8   15   <5    9   <5   <5
ALNI2            21.0   29.0   34.0    46   80   16   24   <5   11
EADM7            30.0   35.0   40.0    36   60   19   34    8   17
HRCM7            26.0   32.0   37.0    44   63   20   36    9   18
CHSI2            27.0   35.0   40.0    53   81   26   44   13   25

LEGEND
CS  = CONDITIONAL SIMULATION (CURRENT OUTLOOK)
HS  = HISTORICAL SIMULATION
FT  = FEET


IN TABLE 2 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE PROBABILITY
OF EXCEEDING THE LISTED STAGE LEVELS (FT) FOR THE VALID TIME PERIOD.

:...TABLE 2--EXCEEDANCE PROBABILITIES...

.B MSR 0401 Z DH12 /DC2403261711/DVD90/HGVFZXT/HGVFZX9/HGVFZXH
.B1 /HGVFZX5/HGVFZXG/HGVFZX1/HGVFZXF
:
:       Chance of Exceeding Stages (ft) at Specific Locations
:             Valid  Period: 04/01/2024 - 06/30/2024
:
:           95%     90%     75%     50%     25%     10%      5%
:           ---     ---     ---     ---     ---     ---     ---
:Mississippi River
CANM7       6.9/    7.7/    9.4/   13.2/   15.2/   18.1/   19.9
LGRM7       7.8/    8.6/   10.3/   14.1/   16.1/   19.0/   20.8
UINI2      12.4/   12.6/   13.0/   15.9/   18.3/   21.5/   24.2
QLDI2       7.6/    8.3/   10.3/   14.8/   17.2/   20.2/   23.0
HNNM7      11.5/   11.9/   12.8/   15.4/   17.4/   20.0/   23.1
SVRM7       8.2/    8.9/   10.3/   14.4/   17.3/   20.4/   23.6
LUSM7      12.0/   12.1/   12.1/   14.9/   17.9/   20.0/   22.8
CLKM7      18.4/   19.5/   20.6/   24.9/   28.3/   30.6/   33.4
CAGM7      18.3/   19.4/   20.7/   25.0/   28.5/   30.6/   33.3
GRFI2      15.4/   15.5/   16.0/   18.3/   20.3/   23.5/   27.7
ALOI2      19.1/   19.2/   19.3/   19.3/   19.4/   19.4/   22.4
ALNI2      10.5/   12.9/   16.4/   19.9/   25.4/   31.4/   32.8
EADM7      14.9/   16.6/   20.6/   25.6/   32.7/   39.0/   41.1
HRCM7      13.1/   14.8/   18.7/   23.5/   30.4/   36.7/   38.9
CHSI2      16.9/   18.5/   22.1/   27.2/   35.5/   42.9/   43.4
.END


IN TABLE 3 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE PROBABILITY
OF FALLING BELOW THE LISTED STAGE LEVELS (FT) FOR THE VALID TIME PERIOD.

:...TABLE 3--NONEXCEEDANCE PROBABILITIES...

.B MSR 0401 Z DH12 /DC2403261711/DVD90/HGVFZNT/HGVFZN9/HGVFZNH
.B1 /HGVFZN5/HGVFZNG/HGVFZN1/HGVFZNF
:
:       Chance of Falling Below Stages (ft) at Specific Locations
:               Valid  Period: 04/01/2024 - 06/30/2024
:
:           95%     90%     75%     50%     25%     10%      5%
:           ---     ---     ---     ---     ---     ---     ---
:Mississippi River
CANM7       5.6/    5.2/    4.5/    4.2/    3.4/    2.6/    2.4
LGRM7       6.5/    6.1/    5.4/    5.1/    4.3/    3.5/    3.3
UINI2      12.1/   12.0/   11.7/   11.6/   11.1/   10.9/   10.9
QLDI2       6.1/    5.8/    4.9/    4.7/    3.9/    3.1/    2.8
HNNM7      10.8/   10.6/   10.2/   10.1/    9.9/    9.7/    9.6
SVRM7       7.0/    6.4/    5.6/    5.5/    4.8/    4.1/    4.0
LUSM7      12.0/   12.0/   11.9/   11.9/   11.9/   11.8/   11.8
CLKM7      17.0/   16.3/   15.7/   15.2/   14.4/   13.7/   13.4
CAGM7      16.7/   16.1/   15.4/   15.0/   14.3/   13.5/   13.2
GRFI2      15.2/   15.0/   14.9/   14.9/   14.8/   14.7/   14.5
ALOI2      18.7/   18.5/   16.8/   14.8/   14.3/   14.3/   14.3
ALNI2       7.6/    6.8/    5.7/    5.4/    5.0/    4.1/    2.9
EADM7       6.6/    5.0/    3.4/    3.2/    2.4/   -0.4/   -1.3
HRCM7       4.5/    2.8/    1.0/    0.8/   -0.1/   -3.3/   -4.4
CHSI2       9.7/    8.8/    6.8/    6.2/    5.6/    2.8/    1.9
.END


:Long-range probabilistic outlooks are issued near the end of
:the month throughout the year.

$$



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