Extended Streamflow Guidance
Issued by NWS
Issued by NWS
Versions:
1
2
697
FGUS63 KMSR 231817
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
116 PM CDT WED APR 23 2025
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: 04/28/2025 - 07/27/2025
: 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 56 7 14 <5 <5
LGRM7 17.0 23.0 25.0 21 43 <5 13 <5 <5
UINI2 19.0 22.0 26.0 23 45 10 26 <5 13
QLDI2 18.0 21.0 25.0 21 44 10 22 <5 13
HNNM7 17.0 22.0 24.0 32 56 8 14 5 13
SVRM7 16.0 20.0 24.0 41 61 14 31 6 13
LUSM7 15.0 20.0 25.0 56 69 14 28 <5 9
CLKM7 25.0 31.0 33.0 56 69 12 25 7 13
CAGM7 26.0 30.0 34.0 48 66 19 35 6 13
GRFI2 20.0 24.0 29.0 41 54 13 24 <5 12
ALOI2 21.0 24.0 31.0 5 19 <5 9 <5 <5
ALNI2 21.0 29.0 34.0 59 71 20 28 5 14
EADM7 30.0 35.0 40.0 44 54 22 34 9 20
HRCM7 26.0 32.0 37.0 50 66 23 35 10 21
CHSI2 27.0 35.0 40.0 66 79 28 40 18 26
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 0428 Z DH12 /DC2504231816/DVD90/HGVFZXT/HGVFZX9/HGVFZXH
.B1 /HGVFZX5/HGVFZXG/HGVFZX1/HGVFZXF
:
: Chance of Exceeding Stages (ft) at Specific Locations
: Valid Period: 04/28/2025 - 07/27/2025
:
: 95% 90% 75% 50% 25% 10% 5%
: --- --- --- --- --- --- ---
:Mississippi River
CANM7 10.8/ 10.9/ 11.9/ 13.2/ 15.2/ 18.7/ 21.4
LGRM7 11.7/ 11.8/ 12.8/ 14.1/ 16.1/ 19.6/ 22.3
UINI2 14.1/ 14.2/ 15.1/ 16.5/ 18.8/ 22.3/ 25.3
QLDI2 12.2/ 12.2/ 13.4/ 15.4/ 17.6/ 21.1/ 24.2
HNNM7 13.7/ 13.8/ 14.5/ 15.7/ 17.7/ 20.7/ 24.1
SVRM7 11.7/ 12.0/ 13.1/ 14.9/ 17.6/ 21.2/ 24.6
LUSM7 12.6/ 12.8/ 13.7/ 15.6/ 17.8/ 21.1/ 23.7
CLKM7 21.8/ 22.3/ 23.5/ 25.7/ 28.2/ 31.7/ 34.2
CAGM7 21.9/ 22.4/ 23.8/ 25.7/ 28.4/ 31.6/ 34.1
GRFI2 15.7/ 15.9/ 16.7/ 19.5/ 20.8/ 24.4/ 26.4
ALOI2 18.9/ 18.9/ 19.1/ 19.2/ 19.4/ 19.4/ 21.1
ALNI2 12.5/ 16.4/ 17.9/ 21.4/ 26.1/ 31.4/ 34.2
EADM7 15.8/ 18.9/ 23.1/ 28.2/ 33.5/ 39.3/ 42.2
HRCM7 14.0/ 17.0/ 21.1/ 26.0/ 31.2/ 37.0/ 40.0
CHSI2 18.5/ 20.5/ 25.1/ 30.0/ 36.1/ 42.9/ 44.0
.END
IN TABLE 3 BELOW...THE 95 THROUGH 5 PERCENT COLUMNS INDICATE THE PROBABILITY
OF FALLING BELOW THE LISTED FLOW LEVELS (KCFS) FOR THE VALID TIME PERIOD.
:...TABLE 3--NONEXCEEDANCE PROBABILITIES...
.B MSR 0428 Z DH12 /DC2504231816/DVD90/QIVFZNT/QIVFZN9/QIVFZNH
.B1 /QIVFZN5/QIVFZNG/QIVFZN1/QIVFZNF
:
: Chance of Falling Below Flows (kcfs) at Specific Locations
: Valid Period: 04/28/2025 - 07/27/2025
:
: 95% 90% 75% 50% 25% 10% 5%
: --- --- --- --- --- --- ---
:Mississippi River
CANM7 105.7/ 92.2/ 73.9/ 55.5/ 44.9/ 34.6/ 32.5
UINI2 106.4/ 92.4/ 74.1/ 56.2/ 44.9/ 35.1/ 32.6
QLDI2 106.4/ 92.4/ 74.1/ 56.2/ 44.9/ 35.1/ 32.6
HNNM7 108.2/ 94.3/ 74.4/ 56.4/ 45.8/ 35.7/ 32.6
SVRM7 108.5/ 94.3/ 74.4/ 56.5/ 46.4/ 35.7/ 32.7
LUSM7 116.1/ 101.1/ 78.8/ 57.0/ 47.5/ 37.0/ 33.7
CLKM7 115.7/ 101.2/ 79.0/ 57.2/ 47.5/ 37.1/ 33.7
CAGM7 115.6/ 101.3/ 79.0/ 57.2/ 47.6/ 37.1/ 33.8
EADM7 238.5/ 234.1/ 162.0/ 135.1/ 117.4/ 101.4/ 86.3
CHSI2 256.2/ 243.1/ 167.2/ 141.1/ 123.2/ 103.8/ 88.2
.END
:Long-range probabilistic outlooks are issued near the end of
:the month throughout the year.
$$