POTOMAC RIVER NEAR WASHINGTON, DC. |
LATITUDE 38 56' 58" |
LONGITUDE 77 07' 40" |
DRAINAGE
AREA 11,560 SQ MI |
DATUM
OF GAGE 37.95 FT |
MEAN MONTHLY FLOW (SFD) | ||||||||||||
YEAR | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
AVG | 6054 | 7299 | 10824 | 14080 | 17384 | 23833 | 20255 | 14793 | 8837 | 4953 | 4846 | 4679 |
MED | 2554 | 4986 | 8692 | 11741 | 14803 | 21014 | 17629 | 13001 | 7102 | 4276 | 3508 | 2505 |
MAX | 44095 | 42029 | 37626 | 52885 | 61043 | 76510 | 57850 | 40406 | 46625 | 21042 | 28207 | 44625 |
MIN | 583 | 700 | 1038 | 1682 | 2982 | 6505 | 5810 | 3921 | 1536 | 599 | 538 | 791 |
1931 | 583 | 700 | 1727 | 3005 | 3671 | 6505 | 15911 | 14373 | 6524 | 6389 | 4448 | 2541 |
1932 | 1400 | 938 | 2710 | 6775 | 11945 | 16796 | 17629 | 27783 | 4027 | 3116 | 1202 | 1019 |
1933 | 7469 | 21039 | 8412 | 15627 | 14704 | 24937 | 36430 | 22700 | 6030 | 5405 | 13422 | 7920 |
1934 | 3605 | 2709 | 3764 | 9572 | 2982 | 12592 | 13686 | 6289 | 4024 | 1922 | 3541 | 9244 |
1935 | 5744 | 3425 | 19386 | 15992 | 25129 | 18168 | 26033 | 12993 | 5208 | 3964 | 4442 | 8843 |
1936 | 2209 | 7217 | 8533 | 24006 | 24221 | 76510 | 23686 | 6415 | 4327 | 3192 | 3173 | 1736 |
1937 | 5326 | 2966 | 12257 | 37187 | 29079 | 13806 | 36398 | 15997 | 7970 | 5118 | 11061 | 6678 |
1938 | 27184 | 17000 | 8661 | 8403 | 9635 | 11912 | 9148 | 10038 | 5772 | 5520 | 5391 | 2452 |
1939 | 1762 | 2561 | 9828 | 7996 | 36786 | 21014 | 18990 | 8556 | 5682 | 6706 | 5932 | 1999 |
1940 | 3905 | 5476 | 3368 | 3461 | 14803 | 16798 | 32507 | 10682 | 18175 | 4833 | 7336 | 8723 |
1941 | 3951 | 11965 | 13286 | 12660 | 8393 | 13337 | 16573 | 4135 | 7528 | 7298 | 2425 | 1733 |
1942 | 810 | 1417 | 3772 | 4077 | 7484 | 13754 | 17183 | 20621 | 8464 | 4159 | 14010 | 4696 |
1943 | 44095 | 10265 | 17208 | 21500 | 26714 | 23325 | 18755 | 15212 | 6738 | 4676 | 2083 | 1449 |
1944 | 1561 | 3857 | 1536 | 7831 | 8375 | 30529 | 17983 | 17328 | 4925 | 1817 | 1149 | 2505 |
1945 | 5842 | 2817 | 8909 | 10097 | 16743 | 21719 | 10785 | 11734 | 6177 | 5874 | 9459 | 19939 |
1946 | 5553 | 8039 | 15728 | 17419 | 12345 | 17326 | 9081 | 15366 | 14931 | 4104 | 4304 | 2228 |
1947 | 3476 | 2647 | 2587 | 12437 | 6878 | 12569 | 7202 | 10582 | 7102 | 6256 | 4230 | 2261 |
1948 | 1438 | 5960 | 3555 | 8877 | 13676 | 17668 | 22133 | 17581 | 7866 | 5054 | 6495 | 2917 |
1949 | 9204 | 11019 | 28945 | 32823 | 24386 | 12533 | 15252 | 11426 | 13782 | 21042 | 7780 | 5154 |
1950 | 2738 | 5650 | 8692 | 8638 | 26123 | 19254 | 9926 | 17007 | 10405 | 4212 | 2224 | 10112 |
1951 | 6553 | 12102 | 30900 | 16194 | 32639 | 21052 | 27017 | 13141 | 19094 | 5604 | 2804 | 1792 |
1952 | 1499 | 2926 | 7384 | 25423 | 18559 | 26743 | 34707 | 25952 | 7552 | 5355 | 3462 | 6186 |
1953 | 2175 | 14502 | 13593 | 26684 | 17179 | 31990 | 19213 | 17588 | 9626 | 3304 | 2680 | 1715 |
1954 | 1229 | 1792 | 4064 | 4111 | 4540 | 19570 | 8567 | 8304 | 5813 | 2144 | 2213 | 1753 |
1955 | 10805 | 8389 | 11078 | 11735 | 12443 | 31955 | 12061 | 7199 | 11734 | 2891 | 28207 | 5214 |
1956 | 4443 | 3492 | 2505 | 2527 | 22904 | 20534 | 18134 | 7625 | 6174 | 9151 | 6236 | 2841 |
1957 | 4458 | 8346 | 11148 | 10587 | 22611 | 15794 | 20747 | 8046 | 6096 | 2044 | 1161 | 1388 |
1958 | 2342 | 2678 | 12054 | 14186 | 11750 | 28958 | 29463 | 25978 | 6233 | 6485 | 6872 | 2441 |
1959 | 1813 | 2018 | 2239 | 5361 | 6810 | 8949 | 12888 | 10827 | 9066 | 2138 | 2233 | 1323 |
1960 | 6228 | 3762 | 8716 | 12275 | 15743 | 16231 | 32939 | 21817 | 13963 | 4048 | 3508 | 3946 |
1961 | 2163 | 2236 | 1777 | 4948 | 31149 | 30210 | 34270 | 16473 | 7517 | 3550 | 2666 | 2386 |
1962 | 2554 | 3010 | 7483 | 10132 | 12209 | 45903 | 23753 | 9891 | 6627 | 2911 | 1709 | 1402 |
1963 | 1630 | 6609 | 4183 | 10454 | 5703 | 45061 | 8432 | 4982 | 7015 | 1990 | 1335 | 1090 |
1964 | 908 | 2773 | 4513 | 18481 | 12392 | 30655 | 18270 | 15630 | 2915 | 2310 | 1199 | 791 |
1965 | 2372 | 1996 | 5671 | 14897 | 19479 | 28426 | 16820 | 7914 | 2587 | 1425 | 1127 | 1018 |
1966 | 1586 | 1097 | 1038 | 1712 | 13568 | 12464 | 11788 | 13990 | 2571 | 695 | 538 | 5712 |
1967 | 6575 | 3828 | 7979 | 9685 | 10835 | 35923 | 9116 | 17270 | 4614 | 4484 | 7364 | 2813 |
1968 | 5529 | 4296 | 18031 | 13274 | 16145 | 24125 | 8289 | 12678 | 11273 | 2738 | 1932 | 2086 |
1969 | 1657 | 5972 | 4279 | 3956 | 6703 | 8385 | 7058 | 3921 | 2216 | 2451 | 8003 | 4372 |
1970 | 2327 | 3626 | 7952 | 11741 | 21389 | 16104 | 34593 | 9215 | 6204 | 8627 | 3606 | 1631 |
1971 | 1922 | 16332 | 15524 | 18133 | 34484 | 21410 | 10760 | 15343 | 15207 | 3072 | 5752 | 7220 |
1972 | 12958 | 8519 | 16871 | 9532 | 25923 | 27458 | 24799 | 25013 | 46625 | 17162 | 6019 | 2791 |
1973 | 10932 | 20122 | 35694 | 16543 | 24286 | 17299 | 35140 | 18942 | 12491 | 5428 | 5401 | 3920 |
1974 | 5508 | 7039 | 23495 | 25132 | 10934 | 11202 | 20993 | 10051 | 13418 | 4494 | 2518 | 3595 |
1975 | 1955 | 2159 | 15501 | 14433 | 20604 | 30128 | 15166 | 19753 | 11131 | 8647 | 4500 | 25310 |
1976 | 18210 | 11085 | 7955 | 24587 | 15448 | 11073 | 12343 | 4887 | 6229 | 3633 | 2683 | 2115 |
1977 | 36791 | 11467 | 10474 | 3726 | 6115 | 23806 | 23003 | 4720 | 2540 | 1946 | 1430 | 1035 |
1978 | 2424 | 14423 | 21819 | 24425 | 10819 | 42840 | 16139 | 30765 | 6389 | 8691 | 10830 | 3347 |
1979 | 1899 | 2168 | 10567 | 30610 | 30175 | 37881 | 18377 | 16882 | 14102 | 5454 | 5434 | 21374 |
1980 | 33742 | 18250 | 13162 | 18366 | 8045 | 23333 | 30957 | 25303 | 7910 | 4276 | 3399 | 1662 |
1981 | 1700 | 3712 | 3551 | 1682 | 13658 | 7545 | 13102 | 10001 | 12911 | 4571 | 1875 | 2640 |
1982 | 2392 | 3150 | 4013 | 7663 | 27682 | 29045 | 13366 | 7995 | 22094 | 5788 | 3674 | 1944 |
1983 | 2081 | 2895 | 6725 | 4373 | 15826 | 25268 | 48260 | 24561 | 11077 | 3595 | 1906 | 1471 |
1984 | 4925 | 9906 | 26645 | 10461 | 39458 | 34429 | 47860 | 19926 | 5433 | 6641 | 11346 | 3257 |
1985 | 3179 | 4986 | 11912 | 7216 | 20864 | 13034 | 11478 | 9686 | 7575 | 3719 | 2825 | 1755 |
1986 | 3365 | 42029 | 16697 | 5500 | 25496 | 25236 | 11881 | 6841 | 2856 | 1885 | 1452 | 963 |
1987 | 1034 | 3705 | 11998 | 11158 | 12682 | 16184 | 45578 | 15300 | 5387 | 4434 | 1089 | 6992 |
1988 | 2630 | 5160 | 11578 | 13321 | 12083 | 8315 | 11683 | 38934 | 6130 | 2342 | 1536 | 2150 |
1989 | 1472 | 3811 | 2625 | 7620 | 6872 | 19806 | 10567 | 40406 | 13216 | 11982 | 6452 | 5024 |
1990 | 9067 | 7877 | 3767 | 13528 | 17010 | 7403 | 12264 | 13001 | 9532 | 6039 | 4236 | 2762 |
1991 | 17564 | 7338 | 14992 | 35700 | 12389 | 25837 | 16093 | 6145 | 2509 | 2029 | 1835 | 1308 |
1992 | 1116 | 1351 | 4753 | 6587 | 6433 | 19015 | 18355 | 12887 | 9063 | 5498 | 3577 | 4000 |
1993 | 2486 | 7962 | 21184 | 17255 | 8556 | 62744 | 57850 | 12531 | 4982 | 2378 | 1906 | 2261 |
1994 | 2271 | 10218 | 20349 | 15483 | 39393 | 67368 | 27780 | 18017 | 3719 | 3486 | 8826 | 3108 |
1995 | 2217 | 3796 | 8289 | 21675 | 7738 | 10700 | 5810 | 11415 | 8412 | 11071 | 4022 | 1379 |
1996 | 6300 | 10696 | 11476 | 52885 | 22621 | 30310 | 22080 | 28271 | 23206 | 11057 | 21722 | 44625 |
1997 | 17362 | 21540 | 37626 | 11948 | 18443 | 31429 | 10904 | 6743 | 10700 | 2554 | 1876 | 2160 |
1998 | 1860 | 17467 | 6863 | 37401 | 61043 | 47839 | 28097 | 25998 | 8846 | 4279 | 2540 | 1387 |
1999 | 1634 | 1362 | 1301 | 7859 | 5605 | 16452 | 13523 | 5143 | 1536 | 599 | 721 | 5270 |
YEAR | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |