Station 44013 (LLNR 420) - BOSTON 16 NM East of Boston, MA

Boston Approach Lighted Buoy BF NOAA 44013

Owned and maintained by National Data Buoy Center
3-meter foam buoy
ARES payload
42.346 N 70.651 W (42°20'44" N 70°39'4" 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: 64 m
Watch circle radius: 122 yards

Caution: Right whales may be active in northeast waters year-round. Mandatory speed restrictions of 10 knots apply to vessels 65 feet or greater in specific areas and times along the US east coast. Voluntary speed restrictions may be in effect in other areas and times. For current information on speed-restricted areas, go to: http://www.nmfs.noaa.gov/pr/shipstrike

For area forecasts and warnings, select: Boston WFO

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Disclaimer

Conditions at 44013 as of
(7:50 pm EST on 11/20/2018)
0050 GMT on 11/21/2018:
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):	NNW ( 330 deg true )
	Wind Speed (WSPD):	17.5 kts
	Wind Gust (GST):	19.4 kts
	Wave Height (WVHT):	5.6 ft
	Dominant Wave Period (DPD):	7 sec
	Average Period (APD):	5.1 sec
	Mean Wave Direction (MWD):	ENE ( 74 deg true )
	Atmospheric Pressure (PRES):	29.87 in
	Pressure Tendency (PTDY):	+0.08 in ( Rising )
	Air Temperature (ATMP):	37.0 °F
	Water Temperature (WTMP):	50.5 °F
	Dew Point (DEWP):	34.9 °F
	Wind Chill (CHILL):	26.6 °F
	Wind Speed at 10 meters (WSPD10M):	17.5 kts
	Wind Speed at 20 meters (WSPD20M):	19.4 kts
	Combined plot of Wind Speed, Gust, and Air Pressure

Continuous Winds
TIME (EST)	WDIR	WSPD
7:50 pm	NNW ( 328 deg )	16.5 kts
7:40 pm	NNW ( 330 deg )	15.9 kts
7:30 pm	NNW ( 333 deg )	16.3 kts
7:20 pm	NNW ( 335 deg )	16.3 kts
7:10 pm	NNW ( 338 deg )	16.1 kts
7:00 pm	NNW ( 341 deg )	16.1 kts

Peak gust during the measurement hour
TIME (EST)	GDR	GST
7:02 pm	NNW ( 340 deg )	19.4 kts

Previous observations

MM	DD	TIME (EST)	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
11	20	6:50 pm	NNW	15.5	19.4	6.2	6	5.1	ENE	29.85	+0.08	36.7	50.9	35.6	-	-	-
11	20	5:50 pm	NNW	19.4	23.3	5.9	6	4.9	ENE	29.83	+0.07	36.7	50.9	36.1	-	-	-
11	20	4:50 pm	N	19.4	23.3	5.9	7	5.0	ENE	29.79	+0.04	40.3	50.9	38.8	-	-	-
11	20	3:50 pm	NNE	19.4	23.3	6.2	6	5.0	NE	29.77	+0.01	41.4	50.9	39.4	-	-	-
11	20	2:50 pm	NNE	19.4	25.3	6.6	6	5.1	NE	29.76	-0.04	41.4	50.9	39.7	-	-	-
11	20	1:50 pm	NNE	23.3	27.2	6.6	7	5.1	NE	29.75	-0.07	42.3	50.9	40.1	-	-	-
11	20	12:50 pm	NE	23.3	27.2	5.9	6	4.9	NE	29.76	-0.08	42.8	51.1	41.2	-	-	-
11	20	11:50 am	NE	21.4	25.3	5.6	6	4.7	NE	29.79	-0.05	42.6	50.9	41.9	-	-	-
11	20	10:50 am	NE	21.4	25.3	4.3	5	4.3	NE	29.82	-0.06	42.8	50.9	42.4	-	-	-
11	20	9:50 am	NE	19.4	23.3	3.3	4	3.8	NE	29.84	-0.04	43.5	50.9	42.4	-	-	-
11	20	8:50 am	NE	17.5	21.4	2.3	4	3.6	ENE	29.84	-0.04	44.4	50.9	43.2	-	-	-
11	20	7:50 am	NNE	11.7	11.7	2.0	4	3.6	ENE	29.88	-0.02	43.0	50.9	42.4	-	-	-
11	20	6:50 am	ENE	13.6	15.5	2.0	3	3.5	ENE	29.87	-0.05	43.2	50.9	42.3	-	-	-
11	20	5:50 am	NE	13.6	15.5	2.0	3	3.5	NE	29.89	-0.06	42.4	50.9	42.1	-	-	-
11	20	4:50 am	NE	11.7	13.6	1.6	10	3.5	NE	29.90	-0.06	42.3	50.9	41.4	-	-	-
11	20	3:50 am	NE	11.7	15.5	1.6	10	3.7	SE	29.92	-0.05	42.4	50.9	39.6	-	-	-
11	20	2:50 am	NE	9.7	11.7	1.6	10	3.8	SSW	29.95	-0.03	41.9	50.9	38.8	-	-	-
11	20	1:50 am	NNE	9.7	13.6	1.6	11	3.6	NNW	29.97	-0.03	41.5	51.1	38.7	-	-	-
11	20	12:50 am	NNE	11.7	13.6	1.6	14	3.8	SSW	29.98	-0.03	40.8	51.1	38.5	-	-	-
11	19	11:50 pm	N	11.7	13.6	1.3	10	3.8	NNW	29.98	-0.02	40.5	51.1	38.5	-	-	-
11	19	10:50 pm	N	9.7	13.6	1.3	14	4.5	SSE	29.99	-0.02	40.6	51.1	39.0	-	-	-
11	19	9:50 pm	N	7.8	9.7	1.3	14	5.0	NNE	30.01	-0.02	41.0	51.1	39.4	-	-	-
11	19	8:50 pm	N	7.8	13.6	1.3	11	5.3	ESE	30.01	-0.02	40.8	51.1	39.0	-	-	-

Detailed Wave Summary
for 44013 as of
(8:00 pm EST on 11/20/2018)
0100 GMT on 11/21/2018:
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):	5.6 ft
	Swell Height (SwH):	2.6 ft
	Swell Period (SwP):	7.1 sec
	Swell Direction (SwD):	ENE
	Wind Wave Height (WWH):	4.9 ft
	Wind Wave Period (WWP):	5.0 sec
	Wind Wave Direction (WWD):	ENE
	Wave Steepness (STEEPNESS):	STEEP
	Average Wave Period (APD):	5.1 sec

Previous observations

MM	DD	TIME (EST)	WVHT ft	SwH ft	SwP sec	SwD	WWH ft	WWP sec	WWD	STEEPNESS	APD sec
11	20	7:00 pm	6.2	1.0	12.1	NNE	6.2	6.2	ENE	VERY_STEEP	5.1
11	20	6:00 pm	5.9	1.3	11.4	NNW	5.6	6.2	ENE	VERY_STEEP	4.9
11	20	5:00 pm	5.9	1.0	12.1	NE	5.9	6.7	ENE	STEEP	5.0
11	20	4:00 pm	6.2	1.0	12.1	NE	6.2	5.9	NE	VERY_STEEP	5.0
11	20	3:00 pm	6.6	1.0	12.9	E	6.6	6.2	NE	VERY_STEEP	5.1
11	20	2:00 pm	6.6	1.0	12.1	E	6.6	6.7	NE	STEEP	5.1
11	20	1:00 pm	5.9	1.0	10.8	WSW	5.9	6.2	NE	VERY_STEEP	4.9
11	20	12:00 pm	5.6	1.0	12.9	N	5.6	5.6	NE	VERY_STEEP	4.7
11	20	11:00 am	4.3	1.0	12.9	SSE	4.3	4.5	NE	VERY_STEEP	4.3
11	20	10:00 am	3.3	1.0	12.9	NNE	3.0	4.0	NE	VERY_STEEP	3.8
11	20	9:00 am	2.3	1.0	12.9	ESE	2.0	3.7	ENE	N/A	3.6
11	20	8:00 am	2.0	1.0	13.8	SE	1.6	3.6	ENE	N/A	3.6
11	20	7:00 am	2.0	1.0	13.8	SE	1.6	3.3	ENE	N/A	3.5
11	20	6:00 am	2.0	1.0	9.1	ENE	1.6	2.9	NE	N/A	3.5
11	20	5:00 am	1.6	1.0	10.0	NE	1.3	3.1	NE	N/A	3.5
11	20	4:00 am	1.6	1.0	10.0	SE	1.3	2.7	NE	N/A	3.7
11	20	3:00 am	1.6	1.0	10.0	SSW	1.3	3.0	NNE	N/A	3.8
11	20	2:00 am	1.6	1.0	11.4	NNW	1.3	2.9	NNE	N/A	3.6
11	20	1:00 am	1.6	1.3	13.8	SSW	1.3	2.9	NNE	N/A	3.8
11	20	12:00 am	1.3	1.0	10.0	NNW	1.0	2.6	NNE	N/A	3.8
11	19	11:00 pm	1.3	1.0	13.8	SSE	0.7	2.4	NNE	N/A	4.5
11	19	10:00 pm	1.3	1.3	13.8	NNE	0.7	3.8	E	N/A	5.0
11	19	9:00 pm	1.3	1.0	11.4	ESE	0.7	4.0	E	N/A	5.3

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.