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. See also rtmon status, webcam status

Conditions at 11:36 am CST on 02/17/2020 (DOY 048 17:36 GMT)
(Updated at about 06,21,36,51 minutes past the hour)

Wind Speed:	11.5 kts (5.9 m/s)
Max Wind Speed:	12.4 kts (6.4 m/s)
Wind Direction:	129° (SE)
Air Temperature:	34.7 °F (1.5 °C)
Wind Chill:	25.7 °F (-3.5 °C)
Dew Point:	30.2 °F (-1.0 °C)
Relative Humidity:	83.4 %
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 10 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	CST	Wind Spd kts	Wind Gust kts	Peak Wind kts	Wind Dir deg	Air Tmp F	Wind Chill F	Dew Pt F	Rel Hum %
2020	048	1100	15.4	16.7	16.7	140	34.3	23.7	29.8	83.2
2020	048	1000	13.2	15.6	20.4	145	34.0	24.1	29.7	84.1
2020	048	0900	12.8	13.8	16.3	128	33.6	23.7	29.7	85.3
2020	048	0800	15.9	17.3	18.9	126	32.9	21.6	29.3	86.3
2020	048	0700	13.4	14.8	19.8	127	32.2	21.7	29.3	88.8
2020	048	0600	13.6	15.2	18.5	126	32.4	21.8	29.9	90.7
2020	048	0500	13.4	14.8	17.9	108	33.1	22.8	30.8	91.1
2020	048	0400	12.2	13.2	15.7	091	33.3	23.5	30.8	90.7
2020	048	0300	9.1	9.7	14.8	104	33.3	25.0	32.4	96.7
2020	048	0200	7.6	7.8	9.3	106	33.3	26.0	33.1	99.5
2020	048	0100	7.0	7.2	8.9	122	33.4	26.6	33.1	98.5
2020	048	0000	9.9	10.7	11.1	097	33.4	24.9	32.6	96.7
2020	047	2300	6.2	6.8	10.7	089	32.9	26.5	32.7	99.3
2020	047	2200	5.2	5.6	6.8	098	32.4	26.6	32.0	98.5
2020	047	2100	3.5	3.7	6.4	141	31.6	27.6	31.3	98.8
2020	047	2000	4.7	4.9	4.9	181	31.8	26.5	30.7	95.6
2020	047	1900	3.1	3.3	5.8	153	31.8	28.4	30.2	93.5
2020	047	1800	4.5	4.7	4.7	133	31.6	26.5	29.0	90.0

Note: Peak wind is max wind gust during entire hour
Note: Wind chill is set to -99 if air temp > 40 F or wind speed < 3 mph

Click here for today's 2-minute data: 20200217.04t.txt, data format (metadata)
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Click here for past data: 2020 | 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