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USGS Surface-Water Daily Statistics for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


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 03034500 Little Mahoning Creek at McCormick, PA


Indiana County, Pennsylvania
Hydrologic Unit Code 05010006
Latitude  40°50'10", Longitude  79°06'37" NAD27
Drainage area 87.4  square miles
Gage datum 1,163.9 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 1939-10-01 -> 2024-09-30)

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
1 241 189 274 281 171 107 76 67 60 54 99 186
2 250 211 281 297 166 105 100 49 63 67 88 166
3 241 214 264 303 150 91 89 103 61 60 99 170
4 263 223 313 293 164 97 64 58 57 69 97 187
5 257 228 360 350 158 98 72 59 46 66 103 177
6 257 203 355 269 157 91 76 48 47 63 97 172
7 210 216 304 246 208 104 68 60 50 55 83 182
8 186 213 284 226 192 97 99 59 37 58 125 198
9 171 172 287 243 191 99 75 59 76 64 108 186
10 178 198 299 247 204 76 84 67 112 59 110 187
11 166 213 273 224 184 73 82 79 77 65 112 214
12 188 204 281 242 222 109 87 77 49 55 117 230
13 192 218 306 255 209 104 81 68 60 47 103 212
14 182 255 318 253 181 109 101 55 93 53 96 188
15 198 242 345 263 176 109 67 73 58 70 104 193
16 177 269 283 241 203 99 63 54 41 85 139 190
17 156 251 299 228 176 92 57 44 54 58 160 179
18 162 268 271 198 190 90 52 52 129 71 146 230
19 222 279 277 181 168 120 92 51 56 73 151 193
20 205 256 318 204 151 99 134 45 47 73 155 187
21 198 283 304 183 146 129 73 67 42 86 134 200
22 193 274 321 175 134 98 73 65 44 72 128 203
23 200 325 278 176 129 145 69 47 47 58 141 192
24 236 297 298 178 142 118 49 41 55 76 144 202
25 237 328 280 184 146 128 55 37 52 69 138 218
26 248 262 261 204 167 102 49 35 50 77 191 202
27 284 266 263 198 139 83 61 36 54 83 194 191
28 218 253 262 191 127 117 57 37 73 103 239 222
29 247 199 323 198 157 95 52 46 85 98 200 240
30 221   317 185 112 69 50 53 68 105 179 278
31 207   316   128   61 75   86   242