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USGS Daily Statistics for Maryland

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01581920 GUNPOWDER FALLS NEAR PARKTON, MD


Baltimore County, Maryland
Hydrologic Unit Code 020600030402
Latitude  39°37'08.6", Longitude  76°41'25.3" NAD83
Drainage area 81.5  square miles
Gage datum 349.61 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1999-10-01 -> 2026-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 101 109 111 129 163 104 72 114 87 105 121 87
2 105 95 148 139 130 119 69 119 95 107 94 87
3 99 107 119 163 118 108 69 104 86 102 90 88
4 95 137 107 146 121 119 71 130 83 91 81 82
5 94 133 114 125 128 117 68 105 82 89 79 81
6 95 136 105 116 133 119 68 97 81 93 84 79
7 93 141 100 115 137 113 85 94 128 89 82 86
8 90 116 97 121 129 113 103 94 232 84 76 93
9 87 100 99 117 119 106 90 92 133 85 72 98
10 92 95 119 108 111 105 82 85 127 85 75 94
11 102 94 165 104 111 109 78 79 111 105 74 113
12 112 93 148 108 112 118 81 74 108 104 79 119
13 103 95 137 124 112 111 82 81 107 93 87 94
14 114 92 142 118 108 105 79 82 99 92 78 91
15 108 90 126 127 112 101 76 80 99 93 73 99
16 105 96 116 129 132 96 78 79 97 89 83 127
17 105 103 111 123 127 94 89 80 96 88 81 116
18 113 96 104 108 111 97 85 75 100 89 76 103
19 106 88 102 106 128 92 83 73 101 83 77 92
20 117 87 101 113 120 91 84 72 107 79 85 89
21 106 88 106 110 113 91 82 69 100 75 78 101
22 96 93 138 108 109 85 77 74 96 73 78 98
23 99 98 119 116 105 84 99 81 119 70 116 110
24 108 103 123 111 103 84 168 85 109 72 102 112
25 123 117 115 105 103 84 158 85 103 75 111 132
26 115 100 108 110 106 88 149 86 101 71 91 127
27 105 97 101 126 107 89 105 92 107 81 93 120
28 100 100 110 121 117 87 97 99 117 93 86 112
29 96 103 120 116 113 81 89 128 130 123 85 106
30 95   125 148 108 74 87 93 119 181 84 99
31 153   133   106   90 84   121   95