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Real-Time Meteorological Observation Network
Thunder Bay Island, MI  (TBIM4)  45° 02´ 05" N,   83° 11´ 39" W

See Metadata File for full description of instruments and parameters, as well as site maps. See also rtmon status, webcam status
Conditions at 9:30 am EST on 12/10/2025 (DOY 344 14:30 GMT)
(Updated every 30 minutes)
Wind Speed:   23.5 kts   (12.1 m/s)
Max Wind Speed:   26.2 kts   (13.5 m/s)
Wind Direction:   39° (NE)
Air Temperature:   30.6 °F   (-0.8 °C)
Wind Chill:   16.3 °F   (-8.7 °C)
Data & Plots of Previous 3 Hours (2 minute increments)
Data & Plots of Previous 5 Days (hourly increments)
         1 Day Windrose Plot, 5 Day Windrose Plot, (explanation)         
Click on image to enlarge
(images updated hourly)

[Live Webcam Image from Thunder Bay Island, MI Met Station Camera 1]

[Live Webcam Image from Thunder Bay Island, MI Met Station Camera 2]

[Live Webcam Image from Thunder Bay Island, MI Met Station Camera 3]

[Live Webcam Image from Thunder Bay Island, MI Met Station Camera 4]

[Live Webcam Image from Thunder Bay Island, MI Met Station Camera 5]

24-hr animations:  1  2  3  4  5
Previous 48 images:  1  2  3  4  5
All Images (past 10 days)

----- Previous 18 Hours (at top of hour)  [English] [Metric] -----
YEARDOY EST Wind
Spd
kts 		Wind
Gust
kts 		Peak
Wind
kts 		Wind
Dir
deg 		Air
Tmp
F 		Wind
Chill
F
20253440900 20.2 22.9 26.2 042 30.6 17.2
20253440800 22.2 25.3 25.9 045 30.0 15.9
20253440700 14.2 18.7 25.5 059 30.4 19.0
20253440600 9.3 13.2 16.7 060 30.0 20.9
20253440500 6.8 8.7 14.0 065 30.7 23.4
20253440400 2.5 3.3 10.9 052 28.4 28.4
20253440300 1.4 1.6 3.9 040 26.8 26.8
20253440200 4.5 6.0 6.0 274 28.0 22.3
20253440100 10.1 11.5 11.5 250 28.6 18.7
20253440000 12.1 13.6 14.2 232 28.6 17.7
20253432300 13.0 14.2 15.6 244 28.6 17.2
20253432200 11.5 12.4 15.2 261 28.4 17.7
20253432100 11.9 14.0 17.3 271 28.6 17.8
20253432000 15.2 19.2 19.2 261 28.4 16.1
20253431800 15.9 18.5 21.0 249 27.1 14.1
20253431700 15.4 18.3 20.8 240 26.8 13.9
20253431600 19.8 22.7 22.7 237 26.8 12.3
20253431500 19.2 21.6 22.9 231 26.2 11.8
Note: Peak wind is max wind gust during entire hour
Note: Wind chill is set to -99 if air temp > 40 F or wind speed < 3 mph

      right arrow Click here for recent 2-minute daily data: 20251210.10t.txt.txt, data format (metadata)
      right arrow Click here for past data: 2025 | Archive

The NDBC station ID for this station is: TBIM4
Access current marine observations on your mobile device. See NDBC's mobile access page.
These data are also available from NDBC website and NDBC's Dial-a-Buoy Program.
See also NWS Marine Forecast for this area, and NWS Recreational Beach Forecast

Realtime Data Disclaimer
Special thanks to NWS, Thunder Bay National Marine Sanctuary (TBNMS), and 9th District USCG.


Additional Great Lakes Meteorological Observations

» NWS, Grand Rapids Office: Near-Realtime Marine Weather, includes current conditions and forecasts
» NWS, White Lake Office: Near-Realtime Marine Weather, includes current conditions and forecasts
» NDBC Great Lakes ImageMap showing U.S. and Canadian Buoys and C-MAN Stations
» NOAA CoastWatch Great Lakes NOAAPORT Data, includes all station types
» NOAA's NowCoast: Web mapping portal to real-time coastal observations
» Winds courtesy of iWindsurf.com
» NWS Great Lakes Marine Text Forecasts by Zone
» Links to Great Lakes Water Temperature, Wind/Wave Data, & Water Levels
» GLIN: Great Lakes Information Network

Contact:
General Information & Media Inquiries:
oar.glerl.www@noaa.gov
(734) 741-2235 		Data Inquiries:
oar.glerl.data@noaa.gov