Station List

Station GRCM4 - GLRC Observatory Image indicating link to RSS feed of recent meteorological observations for station GRCM4

Station operated by Michigan Technological University
Coastal Marine Station
47.121 N 88.545 W (47°7'14" N 88°32'43" W)

Site elevation: 183 m above mean sea level
Air temp height: 185.82 m above site elevation
Anemometer height: 185.82 m above site elevation
Barometer elevation: 185.82 m above mean sea level

Search And Rescue (SAR) Data

Meteorological Observations from Nearby Stations and Ships Image indicating link to RSS feed of recent meteorological observations near station GRCM4

Large icon indicates selected station.
yellow diamond Stations with recent data
red diamond Stations with no data in last 8 hours
(24 hours for tsunami stations)

Conditions at GRCM4 as of
(5:20 pm CDT)
2220 GMT on 04/30/2026:
Note: This report is more than two hours old
     

Click on the graph icon in the table below to see a time series plot of the last five days of that observation.

5-day plot - Wind Direction Wind Direction (WDIR):WSW ( 240 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 8.9 kts
5-day plot - Air Temperature Air Temperature (ATMP): 39.0 °F
5-day plot - Dew Point Dew Point (DEWP): 22.8 °F
5-day plot - Wind Chill Wind Chill (CHILL): 32.4 °F
5-day plot - Wind Speed at 10 Meters Wind Speed at 10 meters (WSPD10M): 5.8 kts
5-day plot - Wind Speed at 20 Meters Wind Speed at 20 meters (WSPD20M): 7.8 kts
Previous observations
TIME
(CDT)		 5-day plot - Wind Direction
WDIR
 		 5-day plot - Wind Speed
WSPD
kts		 5-day plot - Wind Gust
GST
kts		 5-day plot - Wave Height
WVHT
ft		 5-day plot - Dominant Wave Period
DPD
sec		 5-day plot - Average Wave Period
APD
sec		 5-day plot - Mean Wave Direction
MWD
 		 5-day plot - Atmospheric Pressure
PRES
in		 5-day plot - Pressure Tendency
PTDY
in		 5-day plot - Air Temperature
ATMP
°F		 5-day plot - Water Temperature
WTMP
°F		 5-day plot - Dew Point
DEWP
°F		 5-day plot - Salinity
SAL
psu		 5-day plot - Visibility
VIS
nmi		 5-day plot - Tide (above MLLW)
TIDE
ft
2026-04-30 05:00 pm SW 9.9------- 39.0- 23.2---
2026-04-30 04:40 pmWSW 9.9------- 38.8- 23.0---
2026-04-30 04:20 pm SW 8.0------- 39.0- 23.4---
2026-04-30 04:00 pmWSW 8.0------- 39.4- 23.4---
2026-04-30 03:40 pm SW 8.9------- 38.8- 22.3---
2026-04-30 03:20 pmWSW 8.9------- 39.0- 22.3---
2026-04-30 03:00 pm SW 9.9------- 39.0- 23.0---
2026-04-30 02:40 pm SW 7.0------- 38.8- 22.5---
2026-04-30 02:20 pm SW 8.0------- 38.8- 23.7---
2026-04-30 02:00 pm SW 8.0------- 38.8- 22.6---
2026-04-30 01:40 pmWSW 5.1------- 39.0- 22.6---
2026-04-30 01:20 pmWSW 6.0------- 39.0- 22.5---
2026-04-30 01:00 pm SW 8.9------- 39.0- 23.2---
2026-04-30 12:40 pmWSW 5.1------- 38.8- 23.0---
2026-04-30 12:20 pmWSW 8.9------- 38.7- 23.0---
2026-04-30 12:00 pmWSW 12.0------- 38.5- 24.3---
2026-04-30 11:40 am SW 9.9------- 38.5- 23.4---
2026-04-30 11:20 am SW 7.0------- 38.3- 23.0---
2026-04-30 11:00 am SW 5.1------- 37.9- 24.8---
2026-04-30 10:40 am SW 7.0------- 37.6- 25.0---
2026-04-30 10:20 am W 4.1------- 37.2- 25.3---
2026-04-30 10:00 am W 2.9------- 36.7- 25.0---
2026-04-30 09:40 amWSW 6.0------- 36.3- 25.9---
2026-04-30 09:20 amWSW 4.1------- 36.0- 26.6---
2026-04-30 09:00 am W 2.9------- 35.4- 27.1---
2026-04-30 08:40 am W 4.1------- 35.1- 27.0---
2026-04-30 08:20 am W 1.9------- 34.7- 27.5---
2026-04-30 08:00 am W 1.9------- 34.3- 27.5---
2026-04-30 07:40 am W 2.9------- 34.3- 27.9---
2026-04-30 07:20 am W 2.9------- 33.8- 27.9---
2026-04-30 07:00 amWSW 1.9------- 33.8- 28.0---
2026-04-30 06:40 am SW 1.9------- 33.8- 27.9---
2026-04-30 06:20 am SW 4.1------- 34.0- 28.2---
2026-04-30 06:00 am SW 1.9------- 34.0- 28.6---
2026-04-30 05:40 am SW 4.1------- 34.3- 29.3---
2026-04-30 05:20 am SW 4.1------- 34.3- 29.5---
2026-04-30 05:00 am SW 5.1------- 34.7- 30.0---
Ocean Conditions at GRCM4 as of
(5:20 pm CDT)
2220 GMT on 04/30/2026:
Note: This report is more than two hours old

These oceanographic data are displayed in rounded times.

     

Click on the graph icon in the table below to see a time series plot of the last five days of that observation.

Depth (DEPTH): 3.3 ft
5-day plot - Ocean Temperature Ocean Temperature (OTMP):41.97 °F
Previous observations
TIME
(CDT)		 DEPTH
ft		 5-day plot - Ocean Temperature
OTMP
°F		 5-day plot - Conductivity
COND
mS/cm		 5-day plot - Salinity
SAL
psu		 5-day plot - Oxygen Saturation
O2%
%		 5-day plot - Oxygen Concentration
O2PPM
ppm		 5-day plot - Chlorophyll
CLCON
ug/l		 5-day plot - Turbidity
TURB
FTU		 5-day plot - pH
PH
 		 5-day plot - Eh
EH
mV
2026-04-30 05:00 pm 3.341.97--------
2026-04-30 04:40 pm 3.341.97--------
2026-04-30 04:20 pm 3.342.06--------
2026-04-30 04:00 pm 3.342.06--------
2026-04-30 03:40 pm 3.342.06--------
2026-04-30 03:20 pm 3.341.76--------
2026-04-30 03:00 pm 3.341.76--------
2026-04-30 02:40 pm 3.341.76--------
2026-04-30 02:20 pm 3.341.32--------
2026-04-30 02:00 pm 3.341.32--------
2026-04-30 01:40 pm 3.341.36--------
2026-04-30 01:20 pm 3.341.36--------
2026-04-30 01:00 pm 3.341.36--------
2026-04-30 12:40 pm 3.341.36--------
2026-04-30 12:20 pm 3.341.09--------
2026-04-30 12:00 pm 3.341.09--------
2026-04-30 11:40 am 3.341.09--------
2026-04-30 11:20 am 3.340.87--------
2026-04-30 11:00 am 3.340.91--------
2026-04-30 10:40 am 3.340.91--------
2026-04-30 10:20 am 3.340.91--------
2026-04-30 10:00 am 3.340.91--------
2026-04-30 09:40 am 3.340.91--------
2026-04-30 09:20 am 3.340.55--------
2026-04-30 09:00 am 3.340.53--------
2026-04-30 08:40 am 3.340.53--------
2026-04-30 08:20 am 3.340.53--------
2026-04-30 08:00 am 3.340.53--------
2026-04-30 07:40 am 3.340.53--------
2026-04-30 07:20 am 3.340.53--------
2026-04-30 07:00 am 3.340.53--------
2026-04-30 06:40 am 3.340.53--------
2026-04-30 06:20 am 3.340.51--------
2026-04-30 06:00 am 3.340.51--------
2026-04-30 05:40 am 3.340.51--------
2026-04-30 05:20 am 3.340.55--------
2026-04-30 05:00 am 3.340.60--------