Text Products for ESG Issued by MEC

Extended Streamflow Guidance
Issued by NWS
Versions: 1
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FGUS63 KMSR 261412
ESGMEC

MERAMEC RIVER BASIN
LONG-RANGE PROBABILISTIC OUTLOOK
NATIONAL WEATHER SERVICE
NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN
911 AM 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
--------          ----- ----- ----- : ---- ---- ---- ---- ---- ----
:Meramec River
SEEM7            12.0   20.0   25.0    32   35   <5   <5   <5   <5
SLLM7            11.0   20.0   29.0    51   57    9   13   <5   <5
:Bourbeuse River
UNNM7            15.0   22.0   26.0    42   47    9    9   <5   <5
:Meramec River
PCFM7            15.0   23.0   27.0    28   36   <5    5   <5   <5
:Big River
BYRM7            16.0   20.0   28.0    35   44   16   20   <5   <5
:Meramec River
ERKM7            19.0   26.0   31.0    28   35   13   17   <5    5
VLLM7            18.0   21.0   27.0    39   46   28   34   12   22
FNNM7            23.0   29.0   32.0    38   47   14   22    8   11
ARNM7            24.0   35.0   38.0    50   81   19   28   13   20

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 /DC2403261411/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%
:           ---     ---     ---     ---     ---     ---     ---
:Meramec River
SEEM7       2.4/    4.2/    5.8/    9.1/   13.3/   16.1/   19.0
SLLM7       5.5/    6.5/    8.0/   11.2/   14.5/   19.8/   22.2
:Bourbeuse River
UNNM7       5.7/    8.2/   10.4/   13.8/   18.0/   21.2/   24.7
:Meramec River
PCFM7       2.5/    4.3/    8.7/   12.6/   16.1/   21.2/   22.3
:Big River
BYRM7       4.6/    6.0/    8.8/   13.2/   18.8/   20.8/   22.6
:Meramec River
ERKM7       6.5/    7.9/   11.6/   15.2/   20.8/   27.2/   29.1
VLLM7       9.5/   10.3/   11.5/   14.3/   22.4/   29.0/   37.9
FNNM7      13.9/   15.1/   16.8/   20.1/   26.3/   29.8/   37.3
ARNM7      14.5/   14.9/   19.7/   23.7/   31.7/   39.1/   40.7
.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 /DC2403261411/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%
:           ---     ---     ---     ---     ---     ---     ---
:Meramec River
SEEM7       2.1/    2.0/    1.8/    1.6/    1.5/    1.4/    1.4
SLLM7       3.9/    3.7/    3.4/    3.2/    3.0/    2.9/    2.8
:Bourbeuse River
UNNM7       2.4/    2.2/    1.9/    1.7/    1.6/    1.5/    1.5
:Meramec River
PCFM7      -0.8/   -1.0/   -1.3/   -1.6/   -1.8/   -1.9/   -2.0
:Big River
BYRM7       2.8/    2.5/    2.1/    1.7/    1.6/    1.5/    1.3
:Meramec River
ERKM7       3.6/    3.3/    3.1/    2.9/    2.8/    2.7/    2.6
VLLM7      -0.9/   -1.4/   -2.5/   -3.3/   -3.5/   -3.9/   -3.9
FNNM7       3.6/    3.4/    2.0/    1.1/    1.0/    0.6/    0.5
ARNM7       8.9/    7.7/    6.9/    6.3/    6.3/    6.0/    6.0
.END


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

$$
National Weather Service Weather Forecast Office
