Extended Streamflow Guidance
Issued by NWS
Issued by NWS
Versions:
1
746 FGUS63 KMSR 262009 ESGMEC MERAMEC RIVER BASIN LONG-RANGE PROBABILISTIC OUTLOOK NATIONAL WEATHER SERVICE NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 208 PM CST TUE NOV 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: 12/02/2024 - 03/02/2025 : 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 -------- ----- ----- ----- : ---- ---- ---- ---- ---- ---- :Meramec River SEEM7 12.0 20.0 25.0 42 25 6 <5 <5 <5 SLLM7 11.0 20.0 29.0 55 42 11 7 <5 <5 :Bourbeuse River UNNM7 15.0 22.0 26.0 41 36 5 5 <5 <5 :Meramec River PCFM7 15.0 23.0 27.0 43 31 7 6 <5 <5 :Big River BYRM7 16.0 20.0 28.0 44 33 14 9 <5 <5 :Meramec River ERKM7 19.0 26.0 31.0 41 28 11 7 6 5 VLLM7 18.0 21.0 27.0 43 27 11 7 8 6 FNNM7 23.0 29.0 32.0 32 24 7 6 6 6 ARNM7 24.0 35.0 38.0 23 22 6 6 5 5 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 1202 Z DH12 /DC2411262008/DVD90/HGVFZXT/HGVFZX9/HGVFZXH .B1 /HGVFZX5/HGVFZXG/HGVFZX1/HGVFZXF : : Chance of Exceeding Stages (ft) at Specific Locations : Valid Period: 12/02/2024 - 03/02/2025 : : 95% 90% 75% 50% 25% 10% 5% : --- --- --- --- --- --- --- :Meramec River SEEM7 2.9/ 3.2/ 5.9/ 9.3/ 13.8/ 17.7/ 20.0 SLLM7 5.6/ 5.8/ 8.4/ 12.7/ 17.5/ 20.9/ 24.7 :Bourbeuse River UNNM7 5.4/ 6.3/ 9.6/ 13.3/ 18.0/ 20.2/ 22.4 :Meramec River PCFM7 2.2/ 4.2/ 8.1/ 13.7/ 17.9/ 20.9/ 24.8 :Big River BYRM7 6.4/ 6.9/ 9.1/ 15.1/ 18.9/ 21.7/ 23.1 :Meramec River ERKM7 6.8/ 7.9/ 10.6/ 16.5/ 21.9/ 26.6/ 31.8 VLLM7 5.3/ 7.9/ 10.5/ 16.3/ 19.6/ 21.8/ 36.4 FNNM7 9.6/ 12.1/ 14.7/ 20.6/ 23.3/ 24.8/ 36.1 ARNM7 10.7/ 12.0/ 14.1/ 19.9/ 23.8/ 28.4/ 38.2 .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 1202 Z DH12 /DC2411262008/DVD90/QIVFZNT/QIVFZN9/QIVFZNH .B1 /QIVFZN5/QIVFZNG/QIVFZN1/QIVFZNF : : Chance of Falling Below Flows (kcfs) at Specific Locations : Valid Period: 12/02/2024 - 03/02/2025 : : 95% 90% 75% 50% 25% 10% 5% : --- --- --- --- --- --- --- :Meramec River SEEM7 0.3/ 0.3/ 0.3/ 0.2/ 0.2/ 0.1/ 0.1 SLLM7 0.6/ 0.6/ 0.5/ 0.4/ 0.4/ 0.3/ 0.3 :Bourbeuse River UNNM7 0.2/ 0.2/ 0.1/ 0.1/ 0.1/ 0.1/ 0.0 :Meramec River PCFM7 1.0/ 1.0/ 0.9/ 0.7/ 0.6/ 0.5/ 0.4 :Big River BYRM7 0.3/ 0.3/ 0.2/ 0.2/ 0.2/ 0.1/ 0.1 :Meramec River ERKM7 1.4/ 1.3/ 1.2/ 1.0/ 0.8/ 0.7/ 0.6 .END :Long-range probabilistic outlooks are issued near the end of :the month throughout the year. $$