Extended Streamflow Guidance
Issued by NWS
Issued by NWS
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308 FGUS63 KKRF 261424 ESGSIO LONG RANGE PROBABILISTIC OUTLOOK NATIONAL WEATHER SERVICE MISSOURI BASIN RIVER FORECAST CENTER PLEASANT HILL MO 120 PM CST MON NOV 25 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: 11/30/2024 - 02/28/2025 : 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 -------- ----- ----- ----- : ---- ---- ---- ---- ---- ---- :FLOYD R AT SHELDON IA 1N SHLI4 12.0 14.0 16.0 <5 14 <5 10 <5 <5 :FLOYD R AT ALTON IA ALTI4 12.0 16.0 18.0 <5 12 <5 <5 <5 <5 :FLOYD R AT LE MARS IA NO.2 LMRI4 20.0 21.0 24.0 <5 <5 <5 <5 <5 <5 :W BR FLOYD R AT STRUBLE IA 2N STUI4 14.0 15.0 16.0 <5 <5 <5 <5 <5 <5 :FLOYD R AT MERRILL IA MRLI4 12.0 14.0 16.0 <5 <5 <5 <5 <5 <5 :FLOYD R AT JAMES IA 1NE JMEI4 26.0 30.0 34.0 <5 <5 <5 <5 <5 <5 :LITTLE SIOUX R AT MILFORD IA 3W MIFI4 12.0 14.0 16.0 <5 9 <5 <5 <5 <5 :LITTLE SIOUX R AT SPENCER IA NO.2 SPWI4 10.0 14.0 16.0 <5 6 <5 <5 <5 <5 :OCHEYEDAN R AT SPENCER IA 3SW SPOI4 8.0 9.5 10.5 <5 <5 <5 <5 <5 <5 :LITTLE SIOUX R AT LINN GROVE IA LNNI4 16.5 20.0 22.5 <5 <5 <5 <5 <5 <5 :LITTLE SIOUX R AT CHEROKEE IA NO.2 CHKI4 17.0 21.0 24.0 <5 <5 <5 <5 <5 <5 :LITTLE SIOUX R AT CORRECTIONVILLE IA CRRI4 19.0 21.0 23.0 <5 <5 <5 <5 <5 <5 :MAPLE R AT MAPLETON IA 1SW MAPI4 21.0 22.0 23.0 <5 <5 <5 <5 <5 <5 :LITTLE SIOUX R AT TURIN IA 4S TURI4 25.0 28.0 34.5 <5 <5 <5 <5 <5 <5 :WEST FORK DITCH AT HORNICK IA 1E HOKI4 20.0 22.0 26.5 <5 <5 <5 <5 <5 <5 :PERRY CR AT SIOUX CITY IA 4N SIOI4 24.0 26.0 28.0 <5 <5 <5 <5 <5 <5 :BIG SIOUX R AT WATERTOWN SD 8NW WTRS2 10.0 11.0 12.0 <5 <5 <5 <5 <5 <5 :BIG SIOUX R AT WATERTOWN SD WBSS2 9.0 10.0 12.0 <5 5 <5 <5 <5 <5 :BIG SIOUX R AT WATERTOWN SD BRDWAY WBWS2 10.5 11.0 13.5 <5 <5 <5 <5 <5 <5 :BIG SIOUX R AT CASTLEWOOD SD 1NW CSWS2 9.0 11.0 16.0 <5 <5 <5 <5 <5 <5 :BIG SIOUX R AT BROOKINGS SD 10SE BRKS2 9.0 10.5 12.0 <5 <5 <5 <5 <5 <5 :BIG SIOUX R AT DELL RAPIDS SD 2SW DERS2 12.0 14.0 15.0 <5 <5 <5 <5 <5 <5 :BIG SIOUX R AT SIOUX FALLS SD SFLS2 12.0 15.0 17.0 <5 <5 <5 <5 <5 <5 :SKUNK CR AT SIOUX FALLS SD 4SW SIFS2 11.5 15.0 17.0 <5 <5 <5 <5 <5 <5 :BIG SIOUX R AT SIOUX FALLS SD NO CL SXFS2 16.0 18.0 31.0 <5 <5 <5 <5 <5 <5 :SPLIT ROCK CR AT CORSON SD 1E COSS2 8.5 11.0 14.0 <5 <5 <5 <5 <5 <5 :ROCK R AT LUVERNE MN LUVM5 10.0 12.0 14.0 <5 <5 <5 <5 <5 <5 :ROCK R AT ROCK RAPIDS IA RAPI4 13.0 16.0 19.0 <5 <5 <5 <5 <5 <5 :ROCK R AT ROCK VALLEY IA RKVI4 16.0 17.0 19.0 <5 <5 <5 <5 <5 <5 :BIG SIOUX R AT HAWARDEN IA 4N HWDI4 20.5 24.0 27.0 <5 5 <5 <5 <5 <5 :BIG SIOUX R AT AKRON IA AKRI4 16.0 18.0 20.0 <5 5 <5 <5 <5 <5 :BIG SIOUX R AT SIOUX CITY IA SXCI4 32.0 38.0 41.0 <5 <5 <5 <5 <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 FOR THE VALID TIME PERIOD. :...TABLE 2--EXCEEDANCE PROBABILITIES... .B KRF 20241130 Z DH12 /DC2411251320/DVD90/HGVFZXT/HGVFZX9/HGVFZXH .B1 /HGVFZX5/HGVFZXG/HGVFZX1/HGVFZXF : CHANCE OF EXCEEDING STAGES AT SPECIFIC LOCATIONS : VALID PERIOD = 11/30/2024 - 02/28/2025 : 95% 90% 75% 50% 25% 10% 5% : --- --- --- --- --- --- --- :FLOYD R SHLI4 6.1/ 6.1/ 6.3/ 6.4/ 6.9/ 7.1/ 7.4 ALTI4 5.1/ 5.1/ 6.1/ 6.3/ 6.8/ 7.0/ 7.1 LMRI4 10.0/ 10.2/ 10.8/ 11.2/ 12.2/ 12.9/ 13.2 :W BR FLOYD R STUI4 3.5/ 3.9/ 4.1/ 4.5/ 5.0/ 5.5/ 6.2 :FLOYD R MRLI4 0.0/ 0.0/ 0.4/ 0.7/ 1.4/ 2.2/ 2.5 JMEI4 8.3/ 8.4/ 8.8/ 9.1/ 9.5/ 10.2/ 10.5 :LITTLE SIOUX R MIFI4 7.3/ 7.3/ 7.4/ 7.9/ 9.1/ 10.0/ 10.1 SPWI4 4.6/ 4.6/ 4.6/ 5.4/ 6.7/ 7.5/ 7.8 :OCHEYEDAN R SPOI4 2.6/ 2.6/ 2.6/ 2.9/ 3.4/ 3.8/ 4.2 :LITTLE SIOUX R LNNI4 5.9/ 5.9/ 5.9/ 5.9/ 6.5/ 7.3/ 7.6 CHKI4 6.6/ 6.6/ 6.8/ 8.1/ 9.0/ 9.6/ 9.8 CRRI4 5.1/ 5.1/ 5.3/ 5.6/ 6.2/ 6.7/ 6.8 :MAPLE R MAPI4 4.4/ 4.5/ 4.8/ 5.2/ 5.5/ 5.9/ 7.0 :LITTLE SIOUX R TURI4 7.2/ 7.2/ 7.4/ 7.7/ 8.5/ 8.9/ 10.2 :WEST FORK DITCH HOKI4 6.0/ 6.3/ 6.9/ 7.9/ 8.7/ 9.1/ 9.5 :PERRY CR SIOI4 6.5/ 7.1/ 7.3/ 7.6/ 7.7/ 8.0/ 8.0 :BIG SIOUX R WTRS2 4.2/ 4.2/ 4.3/ 4.5/ 4.8/ 5.6/ 6.8 WBSS2 5.0/ 5.0/ 5.0/ 5.3/ 5.9/ 6.3/ 7.0 WBWS2 4.9/ 4.9/ 5.0/ 5.1/ 5.3/ 5.8/ 6.4 CSWS2 4.7/ 4.7/ 4.8/ 5.0/ 5.2/ 5.7/ 6.4 BRKS2 2.2/ 2.2/ 2.2/ 2.6/ 3.2/ 3.5/ 4.8 DERS2 3.3/ 3.3/ 3.3/ 3.7/ 4.2/ 4.6/ 5.8 SFLS2 4.2/ 4.2/ 4.2/ 4.8/ 5.5/ 5.9/ 7.5 :SKUNK CR SIFS2 2.8/ 2.8/ 3.3/ 3.7/ 4.2/ 4.8/ 5.0 :BIG SIOUX R SXFS2 5.8/ 5.8/ 6.0/ 6.3/ 6.6/ 7.2/ 8.0 :SPLIT ROCK CR COSS2 2.1/ 2.1/ 2.1/ 2.3/ 2.8/ 3.2/ 3.8 :ROCK R LUVM5 3.4/ 3.4/ 3.5/ 3.6/ 3.8/ 4.1/ 4.3 RAPI4 7.3/ 7.3/ 7.3/ 7.7/ 8.2/ 8.7/ 9.0 RKVI4 4.9/ 4.9/ 4.9/ 4.9/ 5.2/ 6.5/ 6.9 :BIG SIOUX R HWDI4 12.3/ 12.3/ 12.3/ 12.8/ 13.5/ 14.9/ 15.1 AKRI4 5.3/ 5.3/ 5.3/ 5.9/ 7.0/ 9.6/ 9.7 SXCI4 11.7/ 11.7/ 11.7/ 11.7/ 11.7/ 11.9/ 12.0 .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 KRF 20241130 Z DH12 /DC2411251320/DVD90/HGVFZNT/HGVFZN9/HGVFZNH .B1 /HGVFZN5/HGVFZNG/HGVFZN1/HGVFZNF : CHANCE OF FALLING BELOW STAGES (FT) AT SPECIFIC LOCATIONS : VALID PERIOD = 11/30/2024 - 02/28/2025 : 95% 90% 75% 50% 25% 10% 5% : --- --- --- --- --- --- --- :FLOYD R SHLI4 6.0/ 6.0/ 6.0/ 6.0/ 5.9/ 5.9/ 5.9 ALTI4 5.1/ 5.1/ 5.1/ 5.1/ 5.1/ 5.1/ 5.1 LMRI4 9.8/ 9.8/ 9.8/ 9.7/ 9.7/ 9.7/ 9.7 :W BR FLOYD R STUI4 3.5/ 3.5/ 3.5/ 3.4/ 3.4/ 3.4/ 3.4 :FLOYD R MRLI4 0.0/ 0.0/ 0.0/ 0.0/ 0.0/ 0.0/ 0.0 JMEI4 8.2/ 8.1/ 8.1/ 8.1/ 8.0/ 8.0/ 8.0 :LITTLE SIOUX R MIFI4 6.4/ 6.3/ 6.2/ 6.0/ 5.9/ 5.9/ 5.9 SPWI4 3.7/ 3.7/ 3.6/ 3.4/ 3.4/ 3.3/ 3.3 :OCHEYEDAN R SPOI4 2.3/ 2.2/ 2.2/ 2.0/ 2.0/ 1.9/ 1.9 :LITTLE SIOUX R LNNI4 3.3/ 3.2/ 2.9/ 2.0/ 2.0/ 2.0/ 2.0 CHKI4 2.0/ 2.0/ 2.0/ 2.0/ 2.0/ 2.0/ 2.0 CRRI4 4.8/ 4.8/ 4.8/ 4.8/ 4.8/ 4.8/ 4.8 :MAPLE R MAPI4 4.2/ 4.2/ 4.2/ 4.1/ 4.0/ 4.0/ 4.0 :LITTLE SIOUX R TURI4 6.7/ 6.5/ 6.4/ 6.4/ 6.3/ 6.3/ 6.3 :WEST FORK DITCH HOKI4 5.8/ 5.8/ 5.8/ 5.7/ 5.6/ 5.5/ 5.5 :PERRY CR SIOI4 6.0/ 6.0/ 5.9/ 5.8/ 5.6/ 5.6/ 5.5 :BIG SIOUX R WTRS2 4.2/ 4.1/ 4.1/ 4.1/ 4.1/ 4.1/ 4.1 WBSS2 5.0/ 5.0/ 5.0/ 5.0/ 5.0/ 5.0/ 5.0 WBWS2 4.9/ 4.9/ 4.9/ 4.9/ 4.8/ 4.8/ 4.8 CSWS2 4.6/ 4.6/ 4.6/ 4.6/ 4.6/ 4.6/ 4.6 BRKS2 2.0/ 1.9/ 1.8/ 1.7/ 1.6/ 1.6/ 1.6 DERS2 3.2/ 3.1/ 3.1/ 3.0/ 3.0/ 3.0/ 3.0 SFLS2 3.9/ 3.8/ 3.7/ 3.6/ 3.6/ 3.5/ 3.5 :SKUNK CR SIFS2 2.7/ 2.7/ 2.6/ 2.6/ 2.5/ 2.4/ 2.4 :BIG SIOUX R SXFS2 5.6/ 5.6/ 5.6/ 5.6/ 5.6/ 5.6/ 5.6 :SPLIT ROCK CR COSS2 2.0/ 1.8/ 1.7/ 1.6/ 1.6/ 1.6/ 1.6 :ROCK R LUVM5 3.4/ 3.4/ 3.4/ 3.4/ 3.4/ 3.4/ 3.4 RAPI4 7.1/ 7.0/ 6.8/ 6.8/ 6.8/ 6.8/ 6.8 RKVI4 3.3/ 3.2/ 3.0/ 3.0/ 3.0/ 3.0/ 3.0 :BIG SIOUX R HWDI4 11.7/ 11.7/ 11.4/ 11.2/ 11.1/ 11.0/ 11.0 AKRI4 4.3/ 4.3/ 3.9/ 3.6/ 3.5/ 3.5/ 3.5 SXCI4 8.4/ 8.4/ 8.1/ 7.8/ 7.7/ 7.6/ 7.5 :Long-range probabilistic outlooks will be issued near the end of :the month throughout the year. .END $$