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Hog Island — September 09, 2026

Hog Island — September 09, 2026

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Reference: Hog Island · 2026-09-09

Group: Water visible above the boat’s bow

The camera is positioned exactly 4 inches above the water’s surface. Water is visible above the boat’s 3-foot bow, 0.68 miles away, as on April 15, April 16, May 18, and October 2. No detectable inferior mirage is visible in these observations. These observations zoom in on the shoreline three miles away. The boat is 0.68 miles away.

Weather & River Conditions

Historical · modeled air / NOAA river · nearby, not on-site

Historical context, not on-site measurements. Camera: 39°51′35.9″N, 75°16′47.0″W (project observation location). Air: Open-Meteo archive gridded model, not a station observation. River: nearby NOAA Philadelphia station 8545240, not the Hog Island camera site. River heights use MLLW; predicted tides are not observed water levels. Observed NOAA water levels may be preliminary (q=p), not final verified station data; quality codes and flags are preserved in the cache. All times America/New_York (NOAA local daylight time). Missing values remain unavailable. No ocean-wave or swell inference.

2026-09-09Approx. 12:41 PM ETNear high tide predicted
Air · model
84.6 °F
Water
81 °F
Wind
10.8 mph
River
6.837 ft MLLW
Details & sources

Illustrative near-capture comparison at 12:41:04: median embedded still-photo clock; America/New_York assumed, camera clock/timezone not verified. Not a confirmed simultaneous measurement. Model grid returned: 39.89455, -75.31381. NOAA Philadelphia station: 39.9331, −75.1420 (upstream); nearby context can differ from the camera site.

Air temperature
84.6 °F
Modeled · Open-Meteo grid · 2026-09-09T13:00
Water temperature
81 °F
Observed · NOAA Philadelphia 8545240 · 2026-09-09 12:42
Wind
10.8 mph
Modeled · hourly grid
Gust
24.6 mph
Modeled · hourly grid
Direction
207 ° true
Modeled · hourly grid
Humidity
53 %
Modeled · hourly grid
Dew point
65.3 °F
Modeled · hourly grid
Surface pressure
1021 hPa
Modeled · hourly grid
Cloud
27 %
Modeled · hourly grid
Precipitation
0 in
Modeled · hourly grid
River level
6.837 ft MLLW
Observed · Philadelphia · 2026-09-09 12:42 · verified
Visibility
Unavailable
Unavailable · archive does not provide visibility

Daily summary · modeled air / astronomical sunrise and sunset: Air low: 66.3 °F; Air high: 85.9 °F; Daily precipitation: 0 in; Sunrise: 2026-09-09T06:36; Sunset: 2026-09-09T19:19; Water temperature observed sample range: 80.8–81.5 °F (240 samples); River level observed sample range: 0.486–7.9 ft MLLW (240 samples)

Predicted tides · NOAA Philadelphia 8545240 · ft MLLW: High 2026-09-09 00:14 · 7.036 ft MLLW; Low 2026-09-09 07:17 · 0.654 ft MLLW; High 2026-09-09 12:45 · 6.338 ft MLLW; Low 2026-09-09 19:26 · 0.642 ft MLLW

Hourly modeled atmosphere (24 hours)
Local timeAir temperature (°F)Wind (mph)Gust (mph)Direction (° true)Humidity (%)Dew point (°F)Surface pressure (hPa)Cloud (%)Precipitation (in)
2026-09-09T00:0069.24.37.62078564.31023.7550
2026-09-09T01:0068.53.67.42068965.11023.7380
2026-09-09T02:0066.33.46.91809564.91023.5880
2026-09-09T03:0066.82.96.71939565.31023.4970
2026-09-09T04:0067.13.45.62129465.31023.4960
2026-09-09T05:0066.93.66.32109364.91023.6910
2026-09-09T06:0066.64.17.22029464.71023.4950
2026-09-09T07:0066.44.78.32019464.71023.3850
2026-09-09T08:0068.14.19.22028964.81023.9110
2026-09-09T09:0072.5512.12008166.31023.7120
2026-09-09T10:0076.56.716.620370661023.230
2026-09-09T11:0079.67.9191986466.61022.5250
2026-09-09T12:0082.38.720.82036067.11021.970
2026-09-09T13:0084.610.824.62075365.31021270
2026-09-09T14:0085.211.427.52074863.51020.5130
2026-09-09T15:0085.911.526.62104763.31019.7300
2026-09-09T16:0085.411.926.62064762.91018.6180
2026-09-09T17:0084.61226.22014862.91017.8240
2026-09-09T18:0082.711.825.92005363.81017.5450
2026-09-09T19:0080.210.124.61976065.1101790
2026-09-09T20:0078.110.620.819667661016.8390
2026-09-09T21:0077.111.122.62016765.21017.1430
2026-09-09T22:0075.711.523.31986864.51016.420
2026-09-09T23:0074.711.323.319870641015.590
Observed river samples (480)
ProductLocal timeValue
Water temperature2026-09-09 00:0081 °F
Water temperature2026-09-09 00:0681 °F
Water temperature2026-09-09 00:1281 °F
Water temperature2026-09-09 00:1881 °F
Water temperature2026-09-09 00:2481 °F
Water temperature2026-09-09 00:3081 °F
Water temperature2026-09-09 00:3681 °F
Water temperature2026-09-09 00:4281 °F
Water temperature2026-09-09 00:4881 °F
Water temperature2026-09-09 00:5481 °F
Water temperature2026-09-09 01:0081 °F
Water temperature2026-09-09 01:0681 °F
Water temperature2026-09-09 01:1281 °F
Water temperature2026-09-09 01:1881 °F
Water temperature2026-09-09 01:2481 °F
Water temperature2026-09-09 01:3081 °F
Water temperature2026-09-09 01:3681 °F
Water temperature2026-09-09 01:4281 °F
Water temperature2026-09-09 01:4881 °F
Water temperature2026-09-09 01:5481 °F
Water temperature2026-09-09 02:0081 °F
Water temperature2026-09-09 02:0681 °F
Water temperature2026-09-09 02:1281.1 °F
Water temperature2026-09-09 02:1881.1 °F
Water temperature2026-09-09 02:2481.1 °F
Water temperature2026-09-09 02:3081.1 °F
Water temperature2026-09-09 02:3681.1 °F
Water temperature2026-09-09 02:4281.1 °F
Water temperature2026-09-09 02:4881.1 °F
Water temperature2026-09-09 02:5481.1 °F
Water temperature2026-09-09 03:0081.1 °F
Water temperature2026-09-09 03:0681.1 °F
Water temperature2026-09-09 03:1281.1 °F
Water temperature2026-09-09 03:1881.1 °F
Water temperature2026-09-09 03:2481.1 °F
Water temperature2026-09-09 03:3081.1 °F
Water temperature2026-09-09 03:3681.1 °F
Water temperature2026-09-09 03:4281.1 °F
Water temperature2026-09-09 03:4881.1 °F
Water temperature2026-09-09 03:5481.1 °F
Water temperature2026-09-09 04:0081.1 °F
Water temperature2026-09-09 04:0681.1 °F
Water temperature2026-09-09 04:1281.1 °F
Water temperature2026-09-09 04:1881.1 °F
Water temperature2026-09-09 04:2481.1 °F
Water temperature2026-09-09 04:3081.1 °F
Water temperature2026-09-09 04:3681.1 °F
Water temperature2026-09-09 04:4281.1 °F
Water temperature2026-09-09 04:4881.1 °F
Water temperature2026-09-09 04:5481.1 °F
Water temperature2026-09-09 05:0081.1 °F
Water temperature2026-09-09 05:0681.1 °F
Water temperature2026-09-09 05:1281.1 °F
Water temperature2026-09-09 05:1881.3 °F
Water temperature2026-09-09 05:2481.1 °F
Water temperature2026-09-09 05:3081.1 °F
Water temperature2026-09-09 05:3681.1 °F
Water temperature2026-09-09 05:4281.1 °F
Water temperature2026-09-09 05:4881.1 °F
Water temperature2026-09-09 05:5481.1 °F
Water temperature2026-09-09 06:0081.1 °F
Water temperature2026-09-09 06:0681.1 °F
Water temperature2026-09-09 06:1281.1 °F
Water temperature2026-09-09 06:1881.1 °F
Water temperature2026-09-09 06:2481.1 °F
Water temperature2026-09-09 06:3081.1 °F
Water temperature2026-09-09 06:3681.1 °F
Water temperature2026-09-09 06:4281.1 °F
Water temperature2026-09-09 06:4881.1 °F
Water temperature2026-09-09 06:5481.1 °F
Water temperature2026-09-09 07:0081.1 °F
Water temperature2026-09-09 07:0681.1 °F
Water temperature2026-09-09 07:1281.1 °F
Water temperature2026-09-09 07:1881.1 °F
Water temperature2026-09-09 07:2481.1 °F
Water temperature2026-09-09 07:3081.1 °F
Water temperature2026-09-09 07:3681.1 °F
Water temperature2026-09-09 07:4281.1 °F
Water temperature2026-09-09 07:4881.1 °F
Water temperature2026-09-09 07:5481.1 °F
Water temperature2026-09-09 08:0081.1 °F
Water temperature2026-09-09 08:0681.1 °F
Water temperature2026-09-09 08:1281.1 °F
Water temperature2026-09-09 08:1881.1 °F
Water temperature2026-09-09 08:2481.1 °F
Water temperature2026-09-09 08:3081 °F
Water temperature2026-09-09 08:3681 °F
Water temperature2026-09-09 08:4281 °F
Water temperature2026-09-09 08:4881 °F
Water temperature2026-09-09 08:5481 °F
Water temperature2026-09-09 09:0081 °F
Water temperature2026-09-09 09:0681 °F
Water temperature2026-09-09 09:1280.8 °F
Water temperature2026-09-09 09:1880.8 °F
Water temperature2026-09-09 09:2480.8 °F
Water temperature2026-09-09 09:3080.8 °F
Water temperature2026-09-09 09:3680.8 °F
Water temperature2026-09-09 09:4280.8 °F
Water temperature2026-09-09 09:4880.8 °F
Water temperature2026-09-09 09:5480.8 °F
Water temperature2026-09-09 10:0080.8 °F
Water temperature2026-09-09 10:0680.8 °F
Water temperature2026-09-09 10:1280.8 °F
Water temperature2026-09-09 10:1880.8 °F
Water temperature2026-09-09 10:2480.8 °F
Water temperature2026-09-09 10:3080.8 °F
Water temperature2026-09-09 10:3680.8 °F
Water temperature2026-09-09 10:4280.8 °F
Water temperature2026-09-09 10:4880.8 °F
Water temperature2026-09-09 10:5480.8 °F
Water temperature2026-09-09 11:0080.8 °F
Water temperature2026-09-09 11:0680.8 °F
Water temperature2026-09-09 11:1280.8 °F
Water temperature2026-09-09 11:1880.8 °F
Water temperature2026-09-09 11:2480.8 °F
Water temperature2026-09-09 11:3080.8 °F
Water temperature2026-09-09 11:3680.8 °F
Water temperature2026-09-09 11:4280.8 °F
Water temperature2026-09-09 11:4880.8 °F
Water temperature2026-09-09 11:5480.8 °F
Water temperature2026-09-09 12:0080.8 °F
Water temperature2026-09-09 12:0680.8 °F
Water temperature2026-09-09 12:1280.8 °F
Water temperature2026-09-09 12:1880.8 °F
Water temperature2026-09-09 12:2480.8 °F
Water temperature2026-09-09 12:3081 °F
Water temperature2026-09-09 12:3681 °F
Water temperature2026-09-09 12:4281 °F
Water temperature2026-09-09 12:4881 °F
Water temperature2026-09-09 12:5480.8 °F
Water temperature2026-09-09 13:0081 °F
Water temperature2026-09-09 13:0681 °F
Water temperature2026-09-09 13:1281 °F
Water temperature2026-09-09 13:1881 °F
Water temperature2026-09-09 13:2481 °F
Water temperature2026-09-09 13:3081 °F
Water temperature2026-09-09 13:3681 °F
Water temperature2026-09-09 13:4281 °F
Water temperature2026-09-09 13:4881 °F
Water temperature2026-09-09 13:5481 °F
Water temperature2026-09-09 14:0081 °F
Water temperature2026-09-09 14:0681 °F
Water temperature2026-09-09 14:1281 °F
Water temperature2026-09-09 14:1881 °F
Water temperature2026-09-09 14:2481 °F
Water temperature2026-09-09 14:3081 °F
Water temperature2026-09-09 14:3681 °F
Water temperature2026-09-09 14:4281 °F
Water temperature2026-09-09 14:4881 °F
Water temperature2026-09-09 14:5481 °F
Water temperature2026-09-09 15:0081 °F
Water temperature2026-09-09 15:0681 °F
Water temperature2026-09-09 15:1281.1 °F
Water temperature2026-09-09 15:1881.1 °F
Water temperature2026-09-09 15:2481.1 °F
Water temperature2026-09-09 15:3081.1 °F
Water temperature2026-09-09 15:3681.1 °F
Water temperature2026-09-09 15:4281.1 °F
Water temperature2026-09-09 15:4881.1 °F
Water temperature2026-09-09 15:5481.1 °F
Water temperature2026-09-09 16:0081.1 °F
Water temperature2026-09-09 16:0681.1 °F
Water temperature2026-09-09 16:1281.1 °F
Water temperature2026-09-09 16:1881.1 °F
Water temperature2026-09-09 16:2481.1 °F
Water temperature2026-09-09 16:3081.1 °F
Water temperature2026-09-09 16:3681.3 °F
Water temperature2026-09-09 16:4281.3 °F
Water temperature2026-09-09 16:4881.3 °F
Water temperature2026-09-09 16:5481.3 °F
Water temperature2026-09-09 17:0081.3 °F
Water temperature2026-09-09 17:0681.3 °F
Water temperature2026-09-09 17:1281.3 °F
Water temperature2026-09-09 17:1881.3 °F
Water temperature2026-09-09 17:2481.3 °F
Water temperature2026-09-09 17:3081.3 °F
Water temperature2026-09-09 17:3681.3 °F
Water temperature2026-09-09 17:4281.3 °F
Water temperature2026-09-09 17:4881.3 °F
Water temperature2026-09-09 17:5481.3 °F
Water temperature2026-09-09 18:0081.3 °F
Water temperature2026-09-09 18:0681.3 °F
Water temperature2026-09-09 18:1281.3 °F
Water temperature2026-09-09 18:1881.3 °F
Water temperature2026-09-09 18:2481.3 °F
Water temperature2026-09-09 18:3081.3 °F
Water temperature2026-09-09 18:3681.5 °F
Water temperature2026-09-09 18:4281.5 °F
Water temperature2026-09-09 18:4881.5 °F
Water temperature2026-09-09 18:5481.5 °F
Water temperature2026-09-09 19:0081.5 °F
Water temperature2026-09-09 19:0681.5 °F
Water temperature2026-09-09 19:1281.5 °F
Water temperature2026-09-09 19:1881.5 °F
Water temperature2026-09-09 19:2481.5 °F
Water temperature2026-09-09 19:3081.5 °F
Water temperature2026-09-09 19:3681.5 °F
Water temperature2026-09-09 19:4281.5 °F
Water temperature2026-09-09 19:4881.5 °F
Water temperature2026-09-09 19:5481.5 °F
Water temperature2026-09-09 20:0081.5 °F
Water temperature2026-09-09 20:0681.5 °F
Water temperature2026-09-09 20:1281.5 °F
Water temperature2026-09-09 20:1881.5 °F
Water temperature2026-09-09 20:2481.3 °F
Water temperature2026-09-09 20:3081.3 °F
Water temperature2026-09-09 20:3681.3 °F
Water temperature2026-09-09 20:4281.3 °F
Water temperature2026-09-09 20:4881.1 °F
Water temperature2026-09-09 20:5481.1 °F
Water temperature2026-09-09 21:0081.1 °F
Water temperature2026-09-09 21:0681.1 °F
Water temperature2026-09-09 21:1281.1 °F
Water temperature2026-09-09 21:1881.1 °F
Water temperature2026-09-09 21:2481.1 °F
Water temperature2026-09-09 21:3081.1 °F
Water temperature2026-09-09 21:3681.1 °F
Water temperature2026-09-09 21:4281.1 °F
Water temperature2026-09-09 21:4881.1 °F
Water temperature2026-09-09 21:5481.1 °F
Water temperature2026-09-09 22:0081.1 °F
Water temperature2026-09-09 22:0681.1 °F
Water temperature2026-09-09 22:1281.1 °F
Water temperature2026-09-09 22:1881.1 °F
Water temperature2026-09-09 22:2481.1 °F
Water temperature2026-09-09 22:3081.1 °F
Water temperature2026-09-09 22:3681.1 °F
Water temperature2026-09-09 22:4281.1 °F
Water temperature2026-09-09 22:4881.1 °F
Water temperature2026-09-09 22:5481.1 °F
Water temperature2026-09-09 23:0081.1 °F
Water temperature2026-09-09 23:0681.1 °F
Water temperature2026-09-09 23:1281.1 °F
Water temperature2026-09-09 23:1881.1 °F
Water temperature2026-09-09 23:2481.1 °F
Water temperature2026-09-09 23:3081.1 °F
Water temperature2026-09-09 23:3681.1 °F
Water temperature2026-09-09 23:4281.1 °F
Water temperature2026-09-09 23:4881.1 °F
Water temperature2026-09-09 23:5481.1 °F
River level2026-09-09 00:007.792 ft MLLW
River level2026-09-09 00:067.838 ft MLLW
River level2026-09-09 00:127.851 ft MLLW
River level2026-09-09 00:187.881 ft MLLW
River level2026-09-09 00:247.9 ft MLLW
River level2026-09-09 00:307.897 ft MLLW
River level2026-09-09 00:367.897 ft MLLW
River level2026-09-09 00:427.867 ft MLLW
River level2026-09-09 00:487.848 ft MLLW
River level2026-09-09 00:547.808 ft MLLW
River level2026-09-09 01:007.743 ft MLLW
River level2026-09-09 01:067.677 ft MLLW
River level2026-09-09 01:127.592 ft MLLW
River level2026-09-09 01:187.493 ft MLLW
River level2026-09-09 01:247.392 ft MLLW
River level2026-09-09 01:307.267 ft MLLW
River level2026-09-09 01:367.142 ft MLLW
River level2026-09-09 01:427.031 ft MLLW
River level2026-09-09 01:486.913 ft MLLW
River level2026-09-09 01:546.788 ft MLLW
River level2026-09-09 02:006.66 ft MLLW
River level2026-09-09 02:066.532 ft MLLW
River level2026-09-09 02:126.401 ft MLLW
River level2026-09-09 02:186.266 ft MLLW
River level2026-09-09 02:246.138 ft MLLW
River level2026-09-09 02:306.01 ft MLLW
River level2026-09-09 02:365.876 ft MLLW
River level2026-09-09 02:425.741 ft MLLW
River level2026-09-09 02:485.617 ft MLLW
River level2026-09-09 02:545.492 ft MLLW
River level2026-09-09 03:005.374 ft MLLW
River level2026-09-09 03:065.249 ft MLLW
River level2026-09-09 03:125.131 ft MLLW
River level2026-09-09 03:185.016 ft MLLW
River level2026-09-09 03:244.905 ft MLLW
River level2026-09-09 03:304.787 ft MLLW
River level2026-09-09 03:364.675 ft MLLW
River level2026-09-09 03:424.567 ft MLLW
River level2026-09-09 03:484.452 ft MLLW
River level2026-09-09 03:544.341 ft MLLW
River level2026-09-09 04:004.232 ft MLLW
River level2026-09-09 04:064.121 ft MLLW
River level2026-09-09 04:124.016 ft MLLW
River level2026-09-09 04:183.911 ft MLLW
River level2026-09-09 04:243.799 ft MLLW
River level2026-09-09 04:303.688 ft MLLW
River level2026-09-09 04:363.573 ft MLLW
River level2026-09-09 04:423.461 ft MLLW
River level2026-09-09 04:483.343 ft MLLW
River level2026-09-09 04:543.228 ft MLLW
River level2026-09-09 05:003.12 ft MLLW
River level2026-09-09 05:063.005 ft MLLW
River level2026-09-09 05:122.887 ft MLLW
River level2026-09-09 05:182.776 ft MLLW
River level2026-09-09 05:242.664 ft MLLW
River level2026-09-09 05:302.556 ft MLLW
River level2026-09-09 05:362.444 ft MLLW
River level2026-09-09 05:422.329 ft MLLW
River level2026-09-09 05:482.224 ft MLLW
River level2026-09-09 05:542.123 ft MLLW
River level2026-09-09 06:002.018 ft MLLW
River level2026-09-09 06:061.913 ft MLLW
River level2026-09-09 06:121.804 ft MLLW
River level2026-09-09 06:181.706 ft MLLW
River level2026-09-09 06:241.608 ft MLLW
River level2026-09-09 06:301.516 ft MLLW
River level2026-09-09 06:361.421 ft MLLW
River level2026-09-09 06:421.325 ft MLLW
River level2026-09-09 06:481.237 ft MLLW
River level2026-09-09 06:541.161 ft MLLW
River level2026-09-09 07:001.063 ft MLLW
River level2026-09-09 07:060.965 ft MLLW
River level2026-09-09 07:120.906 ft MLLW
River level2026-09-09 07:180.824 ft MLLW
River level2026-09-09 07:240.745 ft MLLW
River level2026-09-09 07:300.705 ft MLLW
River level2026-09-09 07:360.646 ft MLLW
River level2026-09-09 07:420.6 ft MLLW
River level2026-09-09 07:480.561 ft MLLW
River level2026-09-09 07:540.545 ft MLLW
River level2026-09-09 08:000.551 ft MLLW
River level2026-09-09 08:060.587 ft MLLW
River level2026-09-09 08:120.669 ft MLLW
River level2026-09-09 08:180.81 ft MLLW
River level2026-09-09 08:241.017 ft MLLW
River level2026-09-09 08:301.263 ft MLLW
River level2026-09-09 08:361.516 ft MLLW
River level2026-09-09 08:421.759 ft MLLW
River level2026-09-09 08:481.998 ft MLLW
River level2026-09-09 08:542.228 ft MLLW
River level2026-09-09 09:002.451 ft MLLW
River level2026-09-09 09:062.667 ft MLLW
River level2026-09-09 09:122.874 ft MLLW
River level2026-09-09 09:183.071 ft MLLW
River level2026-09-09 09:243.258 ft MLLW
River level2026-09-09 09:303.448 ft MLLW
River level2026-09-09 09:363.635 ft MLLW
River level2026-09-09 09:423.806 ft MLLW
River level2026-09-09 09:483.967 ft MLLW
River level2026-09-09 09:544.117 ft MLLW
River level2026-09-09 10:004.268 ft MLLW
River level2026-09-09 10:064.413 ft MLLW
River level2026-09-09 10:124.554 ft MLLW
River level2026-09-09 10:184.688 ft MLLW
River level2026-09-09 10:244.813 ft MLLW
River level2026-09-09 10:304.948 ft MLLW
River level2026-09-09 10:365.079 ft MLLW
River level2026-09-09 10:425.203 ft MLLW
River level2026-09-09 10:485.338 ft MLLW
River level2026-09-09 10:545.453 ft MLLW
River level2026-09-09 11:005.564 ft MLLW
River level2026-09-09 11:065.676 ft MLLW
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Source provenance and cached requests
Horizon distance · 4 in camera height
Geometric horizon0.71 mi
With standard refraction0.76 mi
Adjust height

Lens height above water. Assumed refraction: k=0 and 1/7—not measured.

Blank uses recorded height. Changes are not saved.

Refraction needed to match this observation

Recorded lens height: 4 in above water.

Required coefficientk ≈ +3.607
Downward bending needed25.2× standard refraction

This convex-Earth model requires light to bend downward 25.2 times as strongly as standard refraction. This is a calculated model requirement, not a measurement of the atmosphere.

Observation & model assumptions

Shoreline water at 3 miles · 3-foot bow at 0.68 miles · no visible horizon or detectable inferior mirage reported.

Minimum requirement: the shoreline-water ray just clears the bow. The observed greater clearance needs more downward bending; angular equality is not assumed for this exhibit.

Minimum bow clearance: k=1+2R[b−h(1−x/D)]/[x(D−x)]. At this threshold clearance is zero, not the observed positive water band.

One uniform-curvature convex-Earth model; positive k means downward bending. Standard k = +1/7 ≈ +0.143; Earth radius 3,958.76 miles. Water/bow fits use the small-angle parabolic approximation and assume the shoreline water is behind the bow on the same sightline. Lens height is above local water. Observer-provided distances, heights and classifications are not calibrated atmospheric measurements. No detectable mirage does not mean no refraction; this fit does not exclude layered explanations.

Photos

9 high-quality images ordered by capture date