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Realtime Great Lakes Weather Data and Marine Observations


CMAN and U.S. Coast Guard Stations

Station Labels = Latest Wind Dir
Click on marker to view data for that station
or Hold Down Shift Key for Drag Zoom
Note: Only stations containing data for selected day are plotted
See also CMAN Stations not reporting today
Station Types
(Click on name to view all stations for that type)
White MarkerAll Stations 
Lt Blue MarkerBuoys 
Red MarkerCMAN & USCG Stations (20)
Yellow MarkerShip Reports 
Green MarkerSurface Airways Stations 

Gray MarkerReport > 3 Hours Old

  Station Labels: Off | ID | Name
  Air Temp | Wind Spd | Wind Dir
  Bar Press | Wave Hgt | Water Temp
  Cloud Cover

  Change Units to: English | Metric


 Enter New DOY (001-366):  Or Today (043)
 (See also Tables for determining DOY for a given date)
Metadata | Description of Measurements (NDBC)
All 9s in field = missing data
                                       Change Units to English | Metric
                         AIR   DEW WND  WND  WND CLD SOLAR   BAR    WAT  WAV  WAV -------GMT-              TMP   PT  DIR  SPD  GST CVR  RAD    PRES   TMP  HGT  PER YYYYDDDHHMM#ID            C     C  Deg  m/s  m/s  %   W/m2    mb     C    m    s 202504300001APNM4 29 -9.1 999.9 360 0.5 0.5 999 9999.9 9999.9 99.9 99.9 99.9 202504300001CBLO1 49 999.9 999.9 40 2.1 2.1 999 9999.9 9999.9 99.9 99.9 99.9 202504300001CHII2 19 -3.6 -6.4 20 10.3 11.3 999 9999.9 9999.9 99.9 99.9 99.9 202504300001CLSM4 39 -3.6 999.9 70 2.1 3.1 999 9999.9 1024.4 99.9 99.9 99.9 202504300001CNII2 19 -4.1 -7.6 20 6.7 8.2 999 9999.9 9999.9 99.9 99.9 99.9 202504300001CYGM4 29 -10.8 -16.0 200 1.0 2.6 999 9999.9 1027.0 99.9 99.9 99.9 202504300001DBLN6 49 -3.2 999.9 90 2.1 2.1 999 9999.9 1024.1 99.9 99.9 99.9 202504300001DISW3 09 -13.5 -20.2 210 5.7 7.7 999 9999.9 1027.0 99.9 99.9 99.9 202504300001HHLO1 49 -3.4 999.9 70 6.2 7.2 999 9999.9 1020.0 99.9 99.9 99.9 202504300001MCYI3 19 -3.4 -3.7 40 8.2 9.3 999 9999.9 1023.9 99.9 99.9 99.9 202504300001MKGM4 19 -8.3 -15.3 10 4.1 5.1 999 9999.9 1026.1 99.9 99.9 99.9 202504300001MLWW3 19 -7.1 999.9 50 6.2 7.7 999 9999.9 9999.9 99.9 99.9 99.9 202504300001OLCN6 59 -2.6 999.9 240 2.1 3.1 999 9999.9 1025.1 99.9 99.9 99.9 202504300001PILM4 09 999.9 999.9 230 4.6 6.7 999 9999.9 1027.7 99.9 99.9 99.9 202504300001ROAM4 09 -12.1 999.9 230 6.7 8.7 999 9999.9 1027.5 99.9 99.9 99.9 202504300001SBIO1 49 -3.2 999.9 60 3.6 5.1 999 9999.9 1023.9 99.9 99.9 99.9 202504300001SBLM4 29 999.9 999.9 160 4.1 4.1 999 9999.9 9999.9 99.9 99.9 99.9 202504300001SGNW3 19 -11.5 999.9 330 4.1 5.1 999 9999.9 1026.8 99.9 99.9 99.9 202504300001THLO1 49 -3.6 -6.9 50 4.1 4.6 999 9999.9 1022.2 99.9 99.9 99.9 202504300001YGNN6 59 -2.9 999.9 210 1.5 1.5 999 9999.9 1023.7 99.9 99.9 99.9 202504300051CYGM4 29 -10.8 -16.1 210 1.0 2.1 999 9999.9 1027.0 99.9 99.9 99.9 202504300101APNM4 29 -9.1 999.9 0 0.0 0.0 999 9999.9 9999.9 99.9 99.9 99.9 202504300101CYGM4 29 -10.8 -15.5 330 3.1 3.1 999 9999.9 1027.0 99.9 99.9 99.9 202504300101MLWW3 19 -7.3 999.9 50 5.7 6.7 999 9999.9 9999.9 99.9 99.9 99.9 202504300151CNII2 19 -4.1 -7.7 20 6.2 8.2 999 9999.9 9999.9 99.9 99.9 99.9 202504300151CYGM4 29 -10.9 -15.7 310 3.1 4.1 999 9999.9 1027.0 99.9 99.9 99.9
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