Station 46029 (LLNR 688) - COLUMBIA RIVER BAR - 20NM West of Columbia River Mouth

Owned and maintained by National Data Buoy Center
3-meter discus buoy
AMPS payload
46.143 N 124.485 W (46°8'36" N 124°29'6" W)

Site elevation: sea level
Air temp height: 4 m above site elevation
Anemometer height: 5 m above site elevation
Barometer elevation: sea level
Sea temp depth: 0.6 m below water line
Water depth: 134 m
Watch circle radius: 235 yards

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Disclaimer

Conditions at 46029 as of
(7:50 am PST)
1550 GMT on 12/14/2018:
Unit of Measure: Time Zone: Click on the graph icon in the table below to see a time series plot of the last five days of that observation.
	Wind Direction (WDIR):	S ( 180 deg true )
	Wind Speed (WSPD):	27.2 kts
	Wind Gust (GST):	38.9 kts
	Wave Height (WVHT):	17.4 ft
	Dominant Wave Period (DPD):	15 sec
	Average Period (APD):	8.4 sec
	Mean Wave Direction (MWD):	W ( 267 deg true )
	Atmospheric Pressure (PRES):	29.50 in
	Pressure Tendency (PTDY):	-0.08 in ( Falling )
	Air Temperature (ATMP):	56.3 °F
	Water Temperature (WTMP):	50.5 °F
	Dew Point (DEWP):	39.9 °F
	Wind Speed at 10 meters (WSPD10M):	29.1 kts
	Wind Speed at 20 meters (WSPD20M):	31.1 kts
	Combined plot of Wind Speed, Gust, and Air Pressure

Continuous Winds
TIME (PST)	WDIR	WSPD
7:50 am	S ( 177 deg )	26.2 kts
7:40 am	S ( 179 deg )	22.9 kts
7:30 am	S ( 178 deg )	25.1 kts
7:20 am	S ( 177 deg )	28.0 kts
7:10 am	S ( 175 deg )	27.4 kts
7:00 am	S ( 170 deg )	24.1 kts

Supplemental Measurements
Highest 1-minute Wind Speed
Time (PST)		WSPD		WDIR
7:47 am		31.1 kts		S ( 180 deg true )

Peak gust during the measurement hour
TIME (PST)	GDR	GST
7:46 am	S ( 190 deg )	38.9 kts

Previous observations

MM	DD	TIME (PST)	WDIR	WSPD kts	GST kts	WVHT ft	DPD sec	APD sec	MWD	PRES in	PTDY in	ATMP °F	WTMP °F	DEWP °F	SAL psu	VIS nmi	TIDE ft
12	14	6:50 am	S	23.3	29.1	16.4	16	8.1	W	29.53	-0.08	56.8	50.5	38.8	-	-	-
12	14	5:50 am	S	27.2	35.0	19.0	15	8.8	WSW	29.53	-0.10	57.0	50.5	39.0	-	-	-
12	14	4:50 am	S	27.2	38.9	18.0	16	9.0	WNW	29.58	-0.10	56.1	50.5	40.8	-	-	-
12	14	3:50 am	S	29.1	38.9	17.7	16	8.7	W	29.61	-0.11	56.1	50.5	39.6	-	-	-
12	14	2:50 am	S	33.0	40.8	18.4	16	8.8	W	29.63	-0.14	56.3	50.4	37.2	-	-	-
12	14	1:50 am	SSE	23.3	31.1	18.7	16	9.8	W	29.68	-0.13	55.0	50.5	39.0	-	-	-
12	14	12:50 am	SSE	25.3	31.1	18.4	15	9.3	WNW	29.72	-0.11	53.8	50.5	40.6	-	-	-
12	13	11:50 pm	SSE	23.3	29.1	18.7	16	9.2	WNW	29.77	-0.09	52.2	50.7	45.9	-	-	-
12	13	10:50 pm	SSE	23.3	29.1	17.7	16	8.9	WNW	29.81	-0.06	51.4	50.7	47.5	-	-	-
12	13	9:50 pm	SSE	23.3	29.1	18.4	16	9.2	W	29.83	-0.06	51.4	50.7	48.4	-	-	-
12	13	8:50 pm	S	25.3	33.0	18.4	15	9.4	WNW	29.86	-0.05	51.4	50.7	47.8	-	-	-
12	13	7:50 pm	S	25.3	31.1	17.7	15	9.1	WNW	29.87	-0.05	51.3	50.7	48.2	-	-	-
12	13	6:50 pm	S	23.3	33.0	19.0	15	9.5	WNW	29.89	-0.06	51.3	50.7	48.4	-	-	-
12	13	5:50 pm	S	23.3	31.1	18.7	16	9.0	WNW	29.91	-0.05	51.3	50.7	48.4	-	-	-
12	13	4:50 pm	S	23.3	33.0	17.7	14	8.8	W	29.93	-0.05	51.3	50.9	48.2	-	-	-
12	13	3:50 pm	S	23.3	29.1	17.7	13	8.8	WNW	29.95	-0.05	51.4	50.9	48.4	-	-	-
12	13	2:50 pm	S	23.3	31.1	15.7	14	8.0	W	29.96	-0.05	51.4	50.9	48.6	-	-	-
12	13	1:50 pm	S	25.3	31.1	17.1	13	8.3	W	29.98	-0.04	51.6	50.9	48.6	-	-	-
12	13	12:50 pm	S	25.3	31.1	18.0	14	8.5	W	29.99	-0.04	51.3	50.9	49.5	-	-	-
12	13	11:50 am	S	27.2	33.0	16.7	14	8.4	WNW	30.01	-0.01	51.1	50.9	48.9	-	-	-
12	13	10:50 am	S	27.2	33.0	18.0	14	8.5	W	30.02	-0.01	51.3	50.9	50.2	-	-	-
12	13	9:50 am	S	27.2	35.0	17.7	13	8.3	W	30.04	+0.00	51.6	50.7	48.7	-	-	-
12	13	8:50 am	S	27.2	35.0	17.7	15	8.5	W	30.03	-0.03	51.8	50.7	49.1	-	-	-
12	13	7:50 am	S	25.3	31.1	16.7	15	8.1	WNW	30.04	-0.01	51.4	50.7	49.1	-	-	-

Detailed Wave Summary
for 46029 as of (8:00 am PST)
1600 GMT on 12/14/2018:
These wave data are displayed in rounded times. Unit of Measure: Time Zone: Click on the graph icon in the table below to see a time series plot of the last five days of that observation.
	Significant Wave Height (WVHT):	17.4 ft
	Swell Height (SwH):	14.4 ft
	Swell Period (SwP):	14.8 sec
	Swell Direction (SwD):	W
	Wind Wave Height (WWH):	9.8 ft
	Wind Wave Period (WWP):	7.7 sec
	Wind Wave Direction (WWD):	SSW
	Wave Steepness (STEEPNESS):	SWELL
	Average Wave Period (APD):	8.4 sec

Previous observations

MM	DD	TIME (PST)	WVHT ft	SwH ft	SwP sec	SwD	WWH ft	WWP sec	WWD	STEEPNESS	APD sec
12	14	7:00 am	16.4	13.1	16.0	W	9.5	7.7	SSW	SWELL	8.1
12	14	6:00 am	19.0	15.7	14.8	WSW	10.2	6.7	SSW	SWELL	8.8
12	14	5:00 am	18.0	14.8	16.0	WNW	10.5	8.3	SSW	SWELL	9.0
12	14	4:00 am	17.7	14.8	16.0	W	9.8	8.3	SSW	SWELL	8.7
12	14	3:00 am	18.4	15.7	16.0	W	9.2	6.7	SSW	SWELL	8.8
12	14	2:00 am	18.7	16.7	16.0	W	8.2	8.3	SW	SWELL	9.8
12	14	1:00 am	18.4	16.1	14.8	WNW	8.9	7.7	SSW	SWELL	9.3
12	14	12:00 am	18.7	16.1	16.0	WNW	9.5	8.3	SW	SWELL	9.2
12	13	11:00 pm	17.7	13.8	16.0	WNW	11.2	8.3	SW	SWELL	8.9
12	13	10:00 pm	18.4	16.1	16.0	W	8.9	7.1	SSW	SWELL	9.2
12	13	9:00 pm	18.4	15.4	14.8	WNW	9.5	7.1	SSW	SWELL	9.4
12	13	8:00 pm	17.7	15.7	14.8	WNW	8.2	7.7	SSW	SWELL	9.1
12	13	7:00 pm	19.0	16.1	14.8	WNW	10.5	9.1	WSW	SWELL	9.5
12	13	6:00 pm	18.7	16.1	16.0	WNW	9.5	7.1	SSW	SWELL	9.0
12	13	5:00 pm	17.7	13.5	13.8	W	11.2	8.3	SW	SWELL	8.8
12	13	4:00 pm	17.7	15.7	12.9	WNW	7.9	6.2	SSW	AVERAGE	8.8
12	13	3:00 pm	15.7	11.2	13.8	W	11.2	7.7	SW	SWELL	8.0
12	13	2:00 pm	17.1	13.5	12.9	W	10.5	7.7	SSW	AVERAGE	8.3
12	13	1:00 pm	18.0	13.5	13.8	W	12.5	7.1	SSW	SWELL	8.5
12	13	12:00 pm	16.7	12.5	13.8	WNW	11.2	9.1	WSW	SWELL	8.4
12	13	11:00 am	18.0	12.8	13.8	W	12.5	7.1	SSW	SWELL	8.5
12	13	10:00 am	17.7	12.8	12.9	W	12.1	7.7	SSW	AVERAGE	8.3
12	13	9:00 am	17.7	12.8	14.8	W	12.1	7.7	SSW	SWELL	8.5
12	13	8:00 am	16.7	11.8	14.8	WNW	11.8	7.1	S	SWELL	8.1

Plot of wave energy versus frequency (and period)

Description of Measurements

Links which are specific to this station are listed below:

Real Time Data in tabular form for the last forty-five days.

Historical Data & Climatic Summaries for quality controlled data for the current month, previous months, and previous years.

The weekly status report and the weekly maintenance report also provide valuable station information.

Note that the payload types and the station locations occasionally change.
Please refer to the NDBC data inventory for the data history of each station.