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Realtime Great Lakes Weather Data and Marine Observations

 GSLM4: NWS GravellyShoalsMI                                  
CMAN Station
Lat: 44.02°, Lon: -83.54°
Elevation: 179 m
Anemometer Height: 25 m
Related Site: NDBC

Current Time: 1058 GMT
Station Types
(Click on name to view all stations for that type)
White MarkerAll Stations
Lt Blue MarkerBuoys
Red MarkerCMAN & USCG Stations
Yellow MarkerShip Reports
Green MarkerSurface Airways Stations

  Change Units to: English | Metric
 Enter New DOY (001-366):  Or Today (184)
 (See also Tables for determining DOY for a given date)
View multiple days of data for this station:
Select Year and Day of Year (DOY) range:
Year (4-digits):   First Day (001-366):   Last Day (001-366):  
Additional Data Archive: NDBC Historical Data

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
202518400001GSLM4   29  22.1 999.9  10  4.1  5.1 999 9999.9 1011.5 99.9 99.9 99.9             
202518400101GSLM4   29  22.1 999.9 360  3.6  4.6 999 9999.9 1011.5 99.9 99.9 99.9             
202518400201GSLM4   29  22.1 999.9  20  4.6  5.1 999 9999.9 1011.9 99.9 99.9 99.9             
202518400301GSLM4   29  22.5 999.9  10  4.1  4.6 999 9999.9 1011.9 99.9 99.9 99.9             
202518400401GSLM4   29  22.6 999.9  40  3.6  4.6 999 9999.9 1012.2 99.9 99.9 99.9             
202518400501GSLM4   29  22.6 999.9  60  3.1  3.6 999 9999.9 1012.2 99.9 99.9 99.9             
202518401001GSLM4   29  22.7 999.9  60  3.1  3.6 999 9999.9 1012.2 99.9 99.9 99.9             
202518401101GSLM4   29  22.8 999.9  80  3.6  4.1 999 9999.9 1012.5 99.9 99.9 99.9             
202518401201GSLM4   29  22.9 999.9  90  4.6  5.1 999 9999.9 1012.2 99.9 99.9 99.9             
202518401301GSLM4   29  23.0 999.9  80  4.6  5.1 999 9999.9 1012.2 99.9 99.9 99.9             
202518401401GSLM4   29  23.1 999.9  70  2.1  4.1 999 9999.9 1012.2 99.9 99.9 99.9             
202518401501GSLM4   29  23.4 999.9  90  3.6  4.1 999 9999.9 1012.2 99.9 99.9 99.9             
202518402001GSLM4   29  23.9 999.9  90  5.1  6.2 999 9999.9 1011.9 99.9 99.9 99.9             
202518402101GSLM4   29  24.0 999.9  70  1.5  6.2 999 9999.9 1012.5 99.9 99.9 99.9             
202518402201GSLM4   29  23.9 999.9 150  4.1  4.1 999 9999.9 1012.5 99.9 99.9 99.9             
202518402301GSLM4   29  23.7 999.9 150  4.6  5.1 999 9999.9 1012.5 99.9 99.9 99.9             
202518402401GSLM4   29  23.7 999.9 150  3.6  4.6 999 9999.9 1012.5 99.9 99.9 99.9             
202518402501GSLM4   29  23.4 999.9 160  6.2  6.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518403001GSLM4   29  23.3 999.9 160  5.7  6.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518403101GSLM4   29  23.2 999.9 150  4.1  5.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518403201GSLM4   29  23.0 999.9  90  1.5  5.1 999 9999.9 1012.5 99.9 99.9 99.9             
202518403301GSLM4   29  22.8 999.9 120  1.5  3.1 999 9999.9 1012.5 99.9 99.9 99.9             
202518403401GSLM4   29  22.8 999.9 200  1.0  2.1 999 9999.9 1012.5 99.9 99.9 99.9             
202518403501GSLM4   29  23.1 999.9 210  2.6  3.6 999 9999.9 1012.5 99.9 99.9 99.9             
202518404001GSLM4   29  22.8 999.9 220  2.6  3.6 999 9999.9 1012.2 99.9 99.9 99.9             
202518404101GSLM4   29  22.6 999.9 260  3.6  4.6 999 9999.9 1012.2 99.9 99.9 99.9             
202518404201GSLM4   29  22.1 999.9 250  4.1  4.6 999 9999.9 1012.5 99.9 99.9 99.9             
202518404301GSLM4   29  22.3 999.9 250  4.6  4.6 999 9999.9 1012.5 99.9 99.9 99.9             
202518404401GSLM4   29  22.0 999.9 260  4.6  5.1 999 9999.9 1012.5 99.9 99.9 99.9             
202518404501GSLM4   29  21.6 999.9 270  4.6  5.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518405001GSLM4   29  21.6 999.9 260  5.7  6.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518405101GSLM4   29  21.6 999.9 270  5.7  6.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518405201GSLM4   29  21.7 999.9 270  5.7  6.2 999 9999.9 1012.5 99.9 99.9 99.9             
202518405301GSLM4   29  21.6 999.9 270  5.7  6.2 999 9999.9 1012.2 99.9 99.9 99.9             
202518405401GSLM4   29  21.7 999.9 280  5.7  6.2 999 9999.9 1012.2 99.9 99.9 99.9             
202518405501GSLM4   29  21.7 999.9 270  5.1  6.2 999 9999.9 1012.2 99.9 99.9 99.9             
202518406001GSLM4   29  21.6 999.9 270  4.6  6.2 999 9999.9 1012.2 99.9 99.9 99.9             
202518406101GSLM4   29  22.0 999.9 270  5.7  5.7 999 9999.9 1012.2 99.9 99.9 99.9             
202518406201GSLM4   29  22.0 999.9 270  5.1  6.2 999 9999.9 1012.2 99.9 99.9 99.9             
202518406301GSLM4   29  22.0 999.9 270  5.1  5.7 999 9999.9 1012.2 99.9 99.9 99.9             
202518406401GSLM4   29  21.4 999.9 270  6.2  6.2 999 9999.9 1012.2 99.9 99.9 99.9             
202518406501GSLM4   29  21.3 999.9 270  5.7  6.2 999 9999.9 1012.2 99.9 99.9 99.9             
202518407001GSLM4   29  21.3 999.9 260  5.7  6.2 999 9999.9 1012.2 99.9 99.9 99.9             
202518407101GSLM4   29  21.2 999.9 270  5.7  5.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518407201GSLM4   29  21.3 999.9 290  4.6  5.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518407301GSLM4   29  20.9 999.9 300  4.6  6.2 999 9999.9 1012.9 99.9 99.9 99.9             
202518407401GSLM4   29  21.0 999.9 310  5.7  6.7 999 9999.9 1012.5 99.9 99.9 99.9             
202518407501GSLM4   29  20.9 999.9 300  5.1  6.2 999 9999.9 1012.9 99.9 99.9 99.9             
202518408001GSLM4   29  20.6 999.9 310  5.1  6.2 999 9999.9 1012.9 99.9 99.9 99.9             
202518408101GSLM4   29  20.4 999.9 310  5.1  6.2 999 9999.9 1012.9 99.9 99.9 99.9             
202518408201GSLM4   29  20.4 999.9 310  5.1  6.2 999 9999.9 1012.9 99.9 99.9 99.9             
202518408301GSLM4   29  20.5 999.9 310  4.6  5.7 999 9999.9 1012.9 99.9 99.9 99.9             
202518408401GSLM4   29  20.3 999.9 310  4.6  5.7 999 9999.9 1013.2 99.9 99.9 99.9             
202518408501GSLM4   29  20.2 999.9 310  4.6  5.7 999 9999.9 1013.2 99.9 99.9 99.9             
202518409001GSLM4   29  20.1 999.9 320  4.1  5.1 999 9999.9 1013.2 99.9 99.9 99.9             
202518409101GSLM4   29  20.2 999.9 310  3.6  4.6 999 9999.9 1013.5 99.9 99.9 99.9             
202518409201GSLM4   29  20.1 999.9 320  3.6  4.1 999 9999.9 1013.5 99.9 99.9 99.9             
202518409301GSLM4   29  20.0 999.9 320  4.1  4.6 999 9999.9 1013.5 99.9 99.9 99.9             
202518409401GSLM4   29  20.0 999.9 320  4.6  5.7 999 9999.9 1013.9 99.9 99.9 99.9
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