NOAA - Great Lakes Environmental Research Laboratory

Real-Time Meteorological Observation Network
Chicago, IL (CHII2) Harrison-Dever Crib, approx. 2.75 miles offshore

See Metadata File for full description of instruments and parameters, as well as site maps.

Conditions at 5:06 pm CDT on 08/21/2018 (DOY 233 22:06 GMT)
(Updated at about 08,23,38,53 minutes past the hour)

Wind Speed:	17.3 kts (8.9 m/s)
Max Wind Speed:	19.4 kts (10.0 m/s)
Wind Direction:	349° (N)
Air Temperature:	72.1 °F (22.3 °C)
Dew Point:	66.8 °F (19.3 °C)
Relative Humidity:	82.9 %
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 6X per hour)
Webcam Location & Info

6-hr animations: 1 2 3
Previous 48 images (top of hour only): 1 2 3
All Images (past 14 days)

Nearby Webcams (external sites):
Webcams of Chicago courtesy of WXYZ Webcams
Loyola University Lake Shore Campus
Loop and Lake Michigan courtesy of ABC News

---------- Previous 18 Hours (at top of hour) [English] [Metric] ----------
YEAR	DOY	CDT	Wind Spd kts	Wind Gust kts	Peak Wind kts	Wind Dir deg	Air Tmp F	Dew Pt F	Rel Hum %
2018	233	1700	19.1	20.4	20.4	350	72.3	66.6	81.8
2018	233	1600	22.4	24.7	28.2	352	72.7	66.6	80.8
2018	233	1500	21.8	24.5	26.8	343	72.1	67.4	84.7
2018	233	1400	22.0	24.3	28.6	343	72.0	66.9	83.7
2018	233	1300	25.9	28.6	28.6	358	70.0	65.3	84.8
2018	233	1200	28.0	29.9	33.4	003	71.4	65.7	82.0
2018	233	1100	25.5	26.8	31.9	353	72.3	69.5	90.8
2018	233	1000	10.5	11.3	30.7	313	72.5	68.3	86.4
2018	233	0900	8.4	9.1	15.6	311	72.3	69.4	90.3
2018	233	0800	9.3	9.9	11.1	295	71.2	69.5	94.0
2018	233	0700	6.2	6.8	12.2	283	71.8	69.4	92.0
2018	233	0600	5.8	6.4	8.7	213	72.1	69.0	89.8
2018	233	0500	7.8	8.9	11.9	198	72.0	69.3	91.2
2018	233	0400	8.0	8.9	11.3	182	71.8	70.0	94.0
2018	233	0300	14.2	17.5	17.7	186	72.7	70.6	93.0
2018	233	0200	11.5	12.2	18.7	175	73.6	70.3	89.2
2018	233	0100	13.6	14.8	19.2	185	74.1	70.6	88.5
2018	233	0000	15.2	18.5	18.5	162	73.4	68.2	83.6

Note: Peak wind is max wind gust during entire hour

Click here for today's 2-minute data: 20180821.04t.txt, data format (metadata)
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Click here for past data: 2018 | Archive

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 City of Chicago, IL / Water Department, USACE

Additional Great Lakes Meteorological Observations

Real-Time Meteorological Observation NetworkChicago, IL (CHII2) Harrison-Dever Crib, approx. 2.75 miles offshore