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USGS 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 01551500 WB Susquehanna River at Williamsport, PA


Lycoming County, Pennsylvania
Hydrologic Unit Code 02050206
Latitude  41°14'10", Longitude  76°59'49" NAD27
Drainage area 5,682  square miles
Gage datum 494.27 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 1894-10-01 -> 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 10,600 9,460 16,200 23,700 14,300 9,190 5,720 3,440 2,660 4,500 5,590 10,000
2 10,600 9,040 16,700 22,800 13,300 8,360 5,360 3,510 2,560 4,140 5,530 10,200
3 10,400 9,560 15,800 22,500 12,300 8,220 5,000 3,290 2,900 4,410 5,810 9,220
4 9,970 9,600 16,200 21,700 11,900 8,570 5,010 3,050 3,100 3,940 5,580 9,200
5 10,100 9,560 17,500 21,600 11,400 7,910 4,810 2,950 2,990 3,680 5,800 8,940
6 10,100 9,080 18,000 22,000 11,500 8,480 4,770 2,860 3,090 3,610 5,990 8,620
7 10,200 9,320 17,900 21,400 11,400 8,260 4,540 2,910 3,150 3,510 5,760 8,540
8 10,700 9,100 18,200 20,500 11,900 7,820 4,180 3,020 3,300 3,330 5,700 8,660
9 10,700 8,910 17,800 20,200 12,100 7,300 4,410 3,180 2,790 3,330 6,420 8,590
10 10,000 8,310 17,400 19,800 12,500 6,950 4,250 3,010 3,350 3,610 6,460 8,410
11 9,420 8,710 17,600 19,000 13,000 6,610 4,260 2,960 3,760 3,450 6,490 8,950
12 8,910 9,100 18,300 18,000 12,900 6,380 4,030 2,970 3,440 3,450 6,650 9,080
13 9,130 8,970 19,100 17,600 14,000 6,340 4,110 3,080 3,100 3,810 7,040 9,010
14 9,860 9,440 19,000 17,300 14,300 6,440 4,080 3,160 3,020 3,860 7,160 9,750
15 9,820 10,400 20,700 18,200 13,100 6,640 3,800 3,100 2,830 4,050 6,670 10,600
16 9,660 11,400 21,100 18,200 12,400 6,810 3,910 3,080 2,660 3,800 6,530 10,100
17 9,080 11,100 20,800 18,200 12,100 7,140 3,740 2,890 2,760 3,680 7,260 9,670
18 8,530 10,800 21,000 17,100 12,100 7,010 3,520 3,240 3,970 3,690 8,030 9,370
19 9,270 10,500 20,000 15,500 12,100 6,650 4,060 3,560 4,470 3,920 7,820 9,620
20 10,300 10,500 19,700 14,800 12,200 6,330 3,760 3,370 3,610 4,640 7,960 9,030
21 10,600 11,600 19,600 15,000 12,400 6,640 3,700 2,890 3,290 5,610 7,730 8,770
22 11,100 11,600 20,300 14,900 12,600 7,180 3,840 2,810 3,110 5,430 7,370 9,170
23 11,800 12,000 20,300 14,300 13,300 7,910 3,810 2,810 3,290 5,080 7,220 9,500
24 11,600 13,200 20,700 13,700 12,600 7,040 4,060 3,080 3,440 5,020 7,060 9,760
25 11,700 14,600 20,200 13,700 11,600 6,200 4,050 2,860 3,440 4,960 7,150 10,400
26 12,000 14,500 20,300 13,600 11,200 5,900 3,780 2,620 4,170 5,030 8,500 9,960
27 11,500 14,000 21,400 13,700 11,000 5,450 3,680 2,560 4,180 5,100 9,570 9,200
28 11,100 14,700 21,900 13,700 11,400 5,580 3,840 2,540 3,690 5,350 9,630 8,930
29 10,100 12,200 22,500 13,700 11,200 5,710 3,750 2,620 4,020 5,680 10,600 8,990
30 9,550   22,300 13,500 10,500 5,860 3,440 2,950 4,330 5,930 10,400 9,720
31 9,710   23,800   9,900   3,350 2,740   5,860   10,600