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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 01582500 GUNPOWDER FALLS AT GLENCOE, MD


Baltimore County, Maryland
Hydrologic Unit Code 02060003
Latitude  39°32'58.9", Longitude  76°38'10.0" NAD83
Drainage area 160  square miles
Gage datum 244.06 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 1977-10-01 -> 2025-09-30)

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
1 202 227 230 295 284 221 174 207 156 197 194 197
2 214 213 260 311 247 226 163 202 153 177 164 189
3 206 225 239 314 237 214 168 179 142 164 168 190
4 188 246 242 290 246 228 167 193 140 149 151 183
5 181 246 266 285 258 222 163 170 142 152 151 224
6 178 247 247 275 311 216 166 175 252 150 157 199
7 184 242 230 260 280 208 219 176 249 149 150 188
8 201 215 229 254 263 198 211 169 286 175 173 186
9 213 203 243 255 253 197 170 161 212 150 160 198
10 210 200 279 261 243 199 157 157 185 174 165 191
11 214 209 296 247 251 200 155 157 182 190 164 227
12 221 252 262 245 257 200 163 157 170 177 171 212
13 208 230 258 263 253 212 179 182 167 163 169 218
14 213 223 278 251 245 203 168 157 148 163 160 224
15 207 215 264 286 242 193 163 156 145 164 153 207
16 209 219 253 309 270 176 156 156 157 155 204 231
17 207 212 242 287 264 183 159 154 152 152 179 226
18 237 211 237 254 246 183 160 148 178 158 161 223
19 261 202 238 244 258 194 157 147 151 174 158 191
20 269 211 240 250 244 195 158 143 151 164 166 185
21 281 229 279 241 235 190 157 134 150 173 160 209
22 221 253 299 251 230 181 164 146 179 148 163 200
23 213 281 269 254 230 178 182 135 197 155 196 219
24 305 280 295 244 250 187 230 135 161 162 175 215
25 287 311 269 234 234 177 230 133 164 150 185 248
26 289 298 260 232 238 183 211 136 161 142 179 228
27 237 232 263 253 227 183 176 141 176 163 178 211
28 244 228 269 244 223 183 172 173 202 181 236 216
29 212 225 304 235 230 177 171 179 186 212 212 203
30 212   305 279 224 165 178 147 179 259 197 190
31 268   291   214   170 137   186   185