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 USGS Station 12354500
CLARK FORK AT ST. REGIS, MT

PEND OREILLE RIVER BASIN

Latitude: 47^18'07"; Longitude: 115^05'11"
Hydrologic Unit Code: 17010204
Drainage area: 10,709 square miles.
Additional information is available about this station.
Use these links to retrieve Streamflow Hydrograph, or tab-separated ASCII file of monthly data.

Summary of Monthly Flows (1961-90)for Station 12354500

                                           MEDIAN   
                     25             75     CUMU-    
                   QUAR            QUAR-   LATIVE   
PERIOD      AVG.    ILE   MEDIAN   TILE    RUNOFF   
           (cfs)   (cfs)   (cfs)   (cfs)   (inch)   
-------------------------------------------------
OCT.	    3608    2956    3580    3964    0.39
NOV.	    3617    3073    3350    4324    0.73
DEC.	    3399    2700    3008    3606    1.08
OCT-DEC	    3541    2992    3372    4036
CALYEAR	    7538    6244    7573    8925

JAN.	    3322    2557    2981    3695    1.41
FEB.	    3745    2615    3429    4634    1.71
MAR.	    4578    3236    4091    5119    2.30
JAN-MAR	    3881    2776    3511    4852
OCT-MAR	    3711    3021    3619    4485

APR.	    8978    6200    7928   12445    3.30
MAY	   20306   15724   19607   23727    5.20
JUNE	   23464   16508   23370   31060    7.86
APR-JUN	   17582   14369   17149   21288

JULY	    8243    4776    8018   11516    8.66
AUG.	    3392    2564    3322    4087    8.95
SEP.	    3378    2657    3299    3959    9.35
JUL-SEP	    5004    3469    5150    6501
APR-SEP	   11293    9362   11015   14209

WATYEAR	    7505    6291    7353    8847

Extreme High and Low Monthly and Daily Average Flows for Station 12354500

                    SECOND     THIRD                             SECOND     THIRD                
        MON.  HI.  MON.  HI.  MON.  HI.  DAILY  HI.  MON.  LO.  MON.  LO.  MON.  LO.  DAILY  LO. 
       ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------  
        FLOW  YR.  FLOW  YR.  FLOW  YR.  FLOW   YR.  FLOW  YR.  FLOW  YR.  FLOW  YR.  FLOW   YR. 
PERIOD  (cfs)      (cfs)      (cfs)      (cfs)       (cfs)      (cfs)      (cfs)      (cfs)      
------ ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
OCT.	8042.   60 5896.   76 5262.   47 11000.  47 1854.   38 1942.   36 1990.   32 1680.   38 
NOV.	7800.   28 7047.   34 7036.   60 11100.  60 1942.   32 1946.   38 2027.   88 1330.   22 
DEC.	10706.  34 8069.   18 7891.   76 32300.  34 1909.   37 1910.   88 1922.   36 1100.   33 
JAN.	10469.  18 8520.   34 7690.   74 28600.  74 1450.   29 1474.   37 1600.   24 1040.   80 
FEB.	8264.   71 6927.   34 6591.   51 16200.  86 1592.   36 1961.   41 1965.   89 800.    89 
MAR.	11488.  72 10530.  86 10129.  34 21900.  34 2199.   37 2325.   29 2442.   55 1330.   20 
APR.	24883.  34 21420.  43 17629.  56 35200.  34 3333.   37 3394.