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Station 45170 - Michigan City Buoy, IN Image indicating link to RSS feed of recent meteorological observations for station 45170

Owned and maintained by Illinois-Indiana Sea Grant and Purdue Civil Engineering
Buoy
41.755 N 86.968 W (41°45'18" N 86°58'5" W)

Site elevation: 177 m above mean sea level
Air temp height: 1 m above site elevation
Anemometer height: 1.5 m above site elevation
Sea temp depth: 1 m below water line
Water depth: 19 m

Latest NWS Marine Forecast

Search And Rescue (SAR) Data

Meteorological Observations from Nearby Stations and Ships Image indicating link to RSS feed of recent meteorological observations near station 45170

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yellow diamond Stations with recent data
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(24 hours for tsunami stations)
Station 45170

Conditions at 45170 as of
(12:50 pm CDT)
1750 GMT on 07/20/2026:
     

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):SSW ( 200 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 7.8 kts
5-day plot - Wind Gust Wind Gust (GST): 11.7 kts
5-day plot - Wave Height Wave Height (WVHT): 1.0 ft
5-day plot - Dominant Wave Period Dominant Wave Period (DPD): 2 sec
5-day plot - Mean Wave Direction Mean Wave Direction (MWD): SW ( 232 deg true )
5-day plot - Air Temperature Air Temperature (ATMP): 76.3 °F
5-day plot - Water Temperature Water Temperature (WTMP): 75.7 °F
5-day plot - Dew Point Dew Point (DEWP): 67.1 °F
5-day plot - Wind Speed at 10 Meters Wind Speed at 10 meters (WSPD10M): 9.7 kts
5-day plot - Wind Speed at 20 Meters Wind Speed at 20 meters (WSPD20M): 11.7 kts
5-day plot - Wind Speed, Wind Gust and Atmospheric Pressure Combined plot of Wind Speed, Gust, and Air Pressure
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
2026-07-20 12:40 pmSSW 7.8 9.7 0.7-- S-- 76.1 75.7 66.9---
2026-07-20 12:30 pm S 7.8 9.7 1.0 2- SW-- 76.1 75.7 66.7---
2026-07-20 12:20 pm S 7.8 11.7 1.0--WSW-- 75.9 75.7 66.0---
2026-07-20 12:10 pmSSW 7.8 11.7 1.0 2-WSW-- 75.9 75.7 66.4---
2026-07-20 12:00 pmSSW 7.8 11.7 1.0 2-WSW-- 75.7 75.7 66.0---
2026-07-20 11:50 amSSW 7.8 11.7 1.0 2- SW-- 75.7 75.7 66.0---
2026-07-20 11:40 amSSW 7.8 11.7 1.0 2- SW-- 75.6 75.7 65.8---
2026-07-20 11:30 amSSW 7.8 9.7 1.0-- SW-- 75.4 75.7 65.8---
2026-07-20 11:20 amSSW 7.8 9.7 1.0--SSW-- 75.2 75.7 65.8---
2026-07-20 11:10 am S 7.8 9.7 1.0--SSW-- 75.0 75.7 66.0---
2026-07-20 11:00 am S 7.8 11.7 0.7--SSW-- 74.8 75.7 65.8---
2026-07-20 10:50 am S 9.7 11.7 1.0 2- SW-- 74.7 75.7 66.0---
2026-07-20 10:40 am S 9.7 11.7 1.0-- S-- 74.5 75.7 66.0---
2026-07-20 10:30 am S 7.8 11.7 1.0 2-SSW-- 74.3 75.7 65.7---
2026-07-20 10:20 am S 7.8 9.7 1.0 2-SSW-- 74.1 75.7 65.5---
2026-07-20 10:10 amSSW 7.8 9.7 1.0 2-SSW-- 73.9 75.7 65.3---
2026-07-20 10:00 amSSW 7.8 9.7 1.0 2-SSW-- 73.9 75.7 65.3---
2026-07-20 09:50 amSSW 9.7 11.7 1.0 2- S-- 73.8 75.7 65.1---
2026-07-20 09:40 am S 9.7 11.7 1.0 2- S-- 73.6 75.7 65.1---
2026-07-20 09:30 am S 9.7 11.7 1.0 2-SSE-- 73.2 75.7 65.7---
2026-07-20 09:20 am S 11.7 17.5 1.0 2-SSE-- 73.2 75.7 65.7---
2026-07-20 08:10 am S 11.7 13.6 1.3 2- SE-- 71.2 75.7 65.5---
Wave Summary
for 45170 as of (12:50 pm CDT)
1750 GMT on 07/20/2026:

These wave 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.

5-day plot - Significant Wave Height Significant Wave Height (WVHT): 1.0 ft
Previous observations
TIME
(CDT)		 5-day plot - Wave Height
WVHT
ft		 5-day plot - Swell Height
SwH
ft		 5-day plot - Swell Period
SwP
sec		 5-day plot - Swell Direction
SwD
 		 5-day plot - Wind Wave Height
WWH
ft		 5-day plot - Wind Wave Period
WWP
sec		 5-day plot - Wind Wave Direction
WWD
 		 5-day plot - Wave Steepness
STEEPNESS
 		 5-day plot - Average Wave Period
APD
sec
2026-07-20 12:40 pm 0.7------ N/A-
2026-07-20 12:30 pm 0.7------ N/A-
2026-07-20 12:20 pm 1.0------ N/A-
2026-07-20 12:10 pm 1.0------ N/A-
2026-07-20 12:00 pm 1.0------ N/A-
2026-07-20 11:50 am 1.0------ N/A-
2026-07-20 11:40 am 1.0------ N/A-
2026-07-20 11:30 am 1.0------ N/A-
2026-07-20 11:20 am 1.0------ N/A-
2026-07-20 11:10 am 1.0------ N/A-
2026-07-20 11:00 am 0.7------ N/A-
2026-07-20 10:50 am 1.0------ N/A-
2026-07-20 10:40 am 1.0------ N/A-
2026-07-20 10:30 am 1.0------ N/A-
2026-07-20 10:20 am 1.0------ N/A-
2026-07-20 10:10 am 1.0------ N/A-
2026-07-20 10:00 am 1.0------ N/A-
2026-07-20 09:50 am 1.0------ N/A-
2026-07-20 09:40 am 1.0------ N/A-
2026-07-20 09:30 am 1.0------ N/A-
2026-07-20 09:20 am 1.0------ N/A-
2026-07-20 08:10 am 1.0------ N/A-
Ocean Conditions at 45170 as of
(12:50 pm CDT)
1750 GMT on 07/20/2026:

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):75.72 °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
2026-07-20 12:40 pm 3.375.72--------
2026-07-20 12:30 pm 3.375.74--------
2026-07-20 12:20 pm 3.375.72--------
2026-07-20 12:10 pm 3.375.74--------
2026-07-20 12:00 pm 3.375.74--------
2026-07-20 11:50 am 3.375.74--------
2026-07-20 11:40 am 3.375.72--------
2026-07-20 11:30 am 3.375.72--------
2026-07-20 11:20 am 3.375.74--------
2026-07-20 11:10 am 3.375.70--------
2026-07-20 11:00 am 3.375.72--------
2026-07-20 10:50 am 3.375.72--------
2026-07-20 10:40 am 3.375.72--------
2026-07-20 10:30 am 3.375.70--------
2026-07-20 10:20 am 3.375.70--------
2026-07-20 10:10 am 3.375.72--------
2026-07-20 10:00 am 3.375.74--------
2026-07-20 09:50 am 3.375.72--------
2026-07-20 09:40 am 3.375.70--------
2026-07-20 09:30 am 3.375.70--------
2026-07-20 09:20 am 3.375.70--------
2026-07-20 08:10 am 3.375.74--------
Solar Radiation Conditions at 45170 as of
(12:50 pm CDT)
1750 GMT on 07/20/2026:
     

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 - Short Wave Radiation 1 Short Wave Radiation 1 (SRAD1): 359.0watts/meter2
Previous observations
TIME
(CDT)		 5-day plot - Short Wave Radiation 1
SRAD1
w/m2		 5-day plot - Short Wave Radiation 2
SRAD2
w/m2		 5-day plot - Long Wave Radiation
LRAD
w/m2
2026-07-20 12:40 pm 410.8--
2026-07-20 12:30 pm 445.5--
2026-07-20 12:20 pm 444.0--
2026-07-20 12:10 pm 431.3--
2026-07-20 12:00 pm 431.6--
2026-07-20 11:50 am 527.4--
2026-07-20 11:40 am 587.0--
2026-07-20 11:30 am 660.3--
2026-07-20 11:20 am 617.8--
2026-07-20 11:10 am 632.6--
2026-07-20 11:00 am 584.1--
2026-07-20 10:50 am 588.4--
2026-07-20 10:40 am 570.8--
2026-07-20 10:30 am 488.3--
2026-07-20 10:20 am 379.0--
2026-07-20 10:10 am 429.8--
2026-07-20 10:00 am 532.0--
2026-07-20 09:50 am 690.1--
2026-07-20 09:40 am 341.8--
2026-07-20 09:30 am 271.8--
2026-07-20 09:20 am 346.0--
2026-07-20 08:10 am 358.8--