Station 46027 (LLNR 562) - ST GEORGES - 8 NM NW of Crescent City, CA Image indicating link to RSS feed of recent meteorological observations for station 46027


Conditions at 46027 as of
(8:10 pm PDT on 07/11/2026)
0310 GMT on 07/12/2026:
     

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):NNW ( 330 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 19.4 kts
5-day plot - Wind Gust Wind Gust (GST): 25.3 kts
5-day plot - Atmospheric Pressure Atmospheric Pressure (PRES):30.01 in
5-day plot - Air Temperature Air Temperature (ATMP): 56.5 °F
5-day plot - Dew Point Dew Point (DEWP): 52.7 °F
5-day plot - Wind Speed at 10 Meters Wind Speed at 10 meters (WSPD10M): 21.4 kts
5-day plot - Wind Speed at 20 Meters Wind Speed at 20 meters (WSPD20M): 23.3 kts
5-day plot -  Wind Speed, Wind Gust and Atmospheric Pressure Combined plot of Wind Speed, Gust, and Air Pressure
Supplemental Measurements
Lowest 1-minute Pressure
Time (PDT)Pressure
8:08 pm30.01 in
Highest 1-minute Wind Speed
Time (PDT)5-day plot - 1-Minute Wind Speed WSPD 5-day plot - 1-Minute Wind Direction WDIR
8:08 pm 21.4 ktsNNW ( 330 deg true )
Previous observations
TIME
(PDT)
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
2026-07-11 08:00 pmNNW 19.4 23.3----30.01-0.03 56.5- 52.7---
2026-07-11 07:50 pmNNW 17.5 23.3 4.9 94.7NNW30.01- 56.5- 53.2---
2026-07-11 07:40 pmNNW 17.5 21.4----30.01- 56.7- 53.6---
2026-07-11 07:30 pmNNW 17.5 21.4----30.01- 56.7- 53.2---
2026-07-11 07:20 pmNNW 17.5 21.4 4.9 84.8WNW30.01- 56.7- 53.2---
2026-07-11 07:10 pmNNW 17.5 21.4----30.01- 56.7- 53.2---
2026-07-11 07:00 pmNNW 15.5 19.4----30.01-0.03 56.7- 53.4---
2026-07-11 06:50 pmNNW 15.5 19.4 4.6 94.7 NW30.01- 56.7- 53.4---
2026-07-11 06:40 pmNNW 15.5 17.5----30.01- 56.7- 53.2---
2026-07-11 06:30 pmNNW 15.5 17.5----30.02- 56.7- 53.4---
2026-07-11 06:20 pm NW 13.6 17.5 4.6 94.7WNW30.01- 56.7- 53.4---
2026-07-11 06:10 pm NW 13.6 17.5 4.6-4.7WNW30.02- 56.7- 53.4---
2026-07-11 06:00 pm NW 13.6 17.5----30.01-0.02 56.7- 53.6---
2026-07-11 05:50 pmNNW 13.6 15.5 4.3 94.9 NW30.02- 56.5- 53.6---
2026-07-11 05:40 pm NW 13.6 17.5----30.02- 56.5- 53.8---
2026-07-11 05:30 pmNNW 13.6 17.5----30.02- 56.5- 54.1---
2026-07-11 05:20 pmNNW 13.6 17.5 4.3 95.0WNW30.02- 56.5- 54.3---
2026-07-11 05:10 pmNNW 13.6 17.5 4.3-5.0WNW30.02- 56.5- 54.5---
2026-07-11 05:00 pmNNW 13.6 15.5----30.03-0.01 56.3- 54.3---
2026-07-11 04:50 pmNNW 11.7 13.6 3.6 94.8 NW30.03- 56.3- 54.5---
2026-07-11 04:40 pm NW 11.7 15.5----30.03- 56.3- 54.5---
2026-07-11 04:20 pm NW 11.7 13.6 3.9 95.1 NW30.03- 56.3- 54.3---
2026-07-11 04:10 pm NW 11.7 13.6 3.9-5.1 NW30.03- 56.3- 54.3---
2026-07-11 04:00 pm NW 11.7 13.6----30.03+0.00 56.3- 54.3---
2026-07-11 03:50 pm NW 11.7 13.6 3.9 85.3 NW30.04- 56.1- 54.1---
2026-07-11 03:40 pm NW 11.7 15.5----30.04- 56.1- 54.1---
2026-07-11 03:30 pm NW 11.7 13.6----30.04- 56.1- 54.1---
2026-07-11 03:20 pm NW 11.7 15.5 3.6 85.1 NW30.04- 56.1- 54.1---
2026-07-11 03:10 pm NW 11.7 15.5 3.6-5.1 NW30.04- 56.1- 54.1---
2026-07-11 03:00 pm NW 11.7 15.5----30.04+0.01 56.1- 54.0---
2026-07-11 02:50 pm NW 11.7 13.6 3.6 95.4 NW30.04- 56.1- 54.0---
2026-07-11 02:40 pm NW 9.7 13.6 3.6-5.4 NW30.05- 55.9- 54.0---
2026-07-11 02:30 pm NW 11.7 15.5----30.04- 55.9- 54.0---
2026-07-11 02:20 pm NW 13.6 15.5 3.6 85.4 NW30.03- 55.9- 54.0---
2026-07-11 02:10 pm NW 11.7 13.6----30.04- 55.9- 54.0---
2026-07-11 02:00 pmNNW 9.7 11.7----30.04+0.02 55.8- 54.0---
2026-07-11 01:50 pm NW 9.7 13.6 3.6 84.9 NW30.04- 55.8- 54.1---
2026-07-11 01:40 pm NW 11.7 13.6----30.04- 55.6- 54.0---
2026-07-11 01:30 pm NW 11.7 13.6----30.04- 55.6- 54.1---
2026-07-11 01:20 pm NW 11.7 13.6 3.6 95.0 NW30.03- 55.4- 54.1---
2026-07-11 01:10 pm NW 11.7 13.6 3.6-5.0 NW30.03- 55.4- 54.3---
2026-07-11 01:00 pm NW 9.7 13.6----30.03+0.02 55.2- 54.3---
2026-07-11 12:50 pm NW 9.7 13.6 3.6 104.9WNW30.03- 55.0- 54.3---
2026-07-11 12:40 pmNNW 11.7 11.7----30.03- 54.9- 54.1---
2026-07-11 12:30 pmNNW 9.7 11.7----30.03- 54.9- 54.1---
2026-07-11 12:20 pmNNW 9.7 13.6 3.6 84.8WNW30.03- 54.9- 54.1---
2026-07-11 12:10 pmNNW 11.7 13.6 3.6-4.8WNW30.03- 54.9- 54.1---
2026-07-11 12:00 pmNNW 11.7 13.6----30.03+0.02 54.9- 54.1---
2026-07-11 11:50 amNNW 9.7 13.6 3.6 85.3 NW30.03- 54.9- 54.1---
2026-07-11 11:40 am NW 9.7 11.7----30.03- 54.9- 54.1---
2026-07-11 11:30 amNNW 9.7 11.7----30.03- 54.7- 54.0---
2026-07-11 11:20 amNNW 9.7 11.7 3.6 95.8WNW30.03- 54.7- 54.0---
2026-07-11 11:10 amNNW 11.7 13.6 3.6-5.8WNW30.02- 54.7- 54.0---
2026-07-11 11:00 am NW 11.7 15.5----30.04+0.01 54.7- 54.0---
2026-07-11 10:50 am- 11.7 13.6 3.3-6.1 NW30.02-------
2026-07-11 10:40 amNNW 9.7 11.7----30.01- 54.3- 53.6---
2026-07-11 10:30 amNNW 9.7 11.7----30.02- 54.7- 54.0---
2026-07-11 10:20 am NW 7.8 9.7 3.3 86.4WNW30.02- 54.7- 54.0---
2026-07-11 10:10 amNNW 7.8 9.7----30.02- 54.5- 53.8---
2026-07-11 10:00 amNNW 3.9 7.8----30.01+0.01 53.8- 53.1---
2026-07-11 09:50 amNNW 3.9 5.8 3.0 86.3WNW30.01- 53.2- 52.5---
2026-07-11 09:40 amNNW 3.9 3.9----30.01- 53.1- 52.3---
2026-07-11 09:30 am N 3.9 3.9----30.01- 52.7- 52.0---
2026-07-11 09:20 am N 3.9 5.8 3.3 86.4 W30.01- 52.9- 52.2---
2026-07-11 09:10 am N 3.9 5.8 3.3-6.4 W30.01- 52.9- 52.2---
2026-07-11 09:00 am N 3.9 5.8----30.01+0.01 52.9- 52.2---
2026-07-11 08:50 am N 3.9 5.8 2.6 86.1WNW30.01- 52.9- 52.2---
2026-07-11 08:40 am N 3.9 5.8----30.02- 52.9- 52.2---
2026-07-11 08:30 am N 5.8 5.8----30.02- 52.7- 52.0---
2026-07-11 08:20 am N 5.8 7.8 3.0 86.4WNW30.01- 52.7- 52.0---
2026-07-11 08:10 am N 5.8 7.8 3.0-6.4WNW30.01- 52.9- 52.2---
2026-07-11 08:00 am N 5.8 7.8----30.01+0.03 52.9- 52.2---
2026-07-11 07:50 am N 5.8 7.8 3.3 86.4WNW30.01- 52.9- 52.2---
2026-07-11 07:40 am N 5.8 5.8----30.01- 52.7- 52.0---
2026-07-11 07:30 am N 5.8 5.8----30.01- 52.7- 52.0---
2026-07-11 07:20 am N 5.8 7.8 3.0 156.3SSW30.01- 52.7- 52.0---
2026-07-11 07:10 am N 7.8 7.8 3.0-6.3SSW30.01- 52.9- 52.2---
2026-07-11 07:00 am N 7.8 7.8----30.01+0.01 53.1- 52.3---
2026-07-11 06:50 am N 7.8 7.8 3.0 86.5WNW30.01- 52.9- 52.2---
2026-07-11 06:40 am N 7.8 7.8----30.01- 53.1- 52.3---
2026-07-11 06:30 am N 7.8 7.8----30.01- 53.2- 52.5---
2026-07-11 06:20 amNNW 7.8 7.8 3.0 86.3WNW30.01- 53.4- 52.7---
2026-07-11 06:10 amNNW 7.8 9.7 3.0-6.3WNW30.00- 53.6- 52.9---
2026-07-11 06:00 am N 7.8 9.7----30.00+0.00 53.8- 53.1---
2026-07-11 05:50 am N 7.8 9.7 3.0 86.1WNW30.00- 54.0- 53.2---
2026-07-11 05:40 am N 5.8 7.8 3.0-6.1WNW30.00- 54.1- 53.4---
2026-07-11 05:30 am N 5.8 7.8----30.00- 54.0- 53.2---
2026-07-11 05:20 am N 5.8 7.8 3.0 86.3WNW29.99- 54.0- 53.2---
2026-07-11 05:10 am N 5.8 7.8 3.0-6.3WNW29.99- 54.1- 53.4---
2026-07-11 05:00 am N 5.8 7.8----29.99-0.01 54.1- 53.4---
2026-07-11 04:50 amNNE 3.9 5.8 3.0 76.2WNW29.99- 53.8- 53.1---
2026-07-11 04:40 amNNE 3.9 3.9----29.99- 53.6- 52.9---
2026-07-11 04:30 amNNE 3.9 5.8----30.00- 53.4- 52.7---
2026-07-11 04:20 amNNE 3.9 5.8 3.0 166.5SSW30.00- 53.2- 52.5---
2026-07-11 04:10 amNNE 5.8 5.8 3.0-6.5SSW30.00- 53.2- 52.5---
2026-07-11 04:00 amNNE 5.8 7.8----29.99-0.01 53.2- 52.5---
2026-07-11 03:50 am N 5.8 7.8 3.0 86.1WNW29.99- 53.6- 52.9---
2026-07-11 03:40 am N 5.8 5.8----29.99- 54.0- 53.2---
2026-07-11 03:30 am N 3.9 5.8----29.99- 53.4- 52.7---
2026-07-11 03:20 am N 3.9 3.9 3.0 86.3WNW29.99- 53.6- 52.9---
2026-07-11 03:10 amNNW 5.8 5.8 3.0-6.3WNW30.00- 54.1- 53.4---
2026-07-11 03:00 am NW 5.8 5.8----30.00+0.00 53.8- 53.1---
2026-07-11 02:50 am NW 3.9 5.8 3.0 86.3 NW30.00- 53.6- 52.9---
2026-07-11 02:40 am NW 5.8 5.8----30.00- 53.6- 52.9---
2026-07-11 02:30 am NW 3.9 5.8----30.00- 53.6- 52.9---
2026-07-11 02:20 am NW 3.9 5.8 3.3 86.4WNW30.00- 53.6- 52.9---
2026-07-11 02:10 am NW 3.9 5.8 3.3-6.4WNW30.00- 54.0- 53.2---
2026-07-11 02:00 am NW 5.8 5.8----30.00-0.02 53.8- 53.1---
2026-07-11 01:50 am NW 3.9 5.8 3.0 146.2SSW30.00- 53.6- 52.9---
2026-07-11 01:40 am NW 3.9 5.8----30.00- 53.6- 52.9---
2026-07-11 01:30 am NW 5.8 5.8----30.00- 53.6- 52.9---
2026-07-11 01:20 am NW 3.9 5.8 3.3 86.2WNW30.00- 53.4- 52.7---
2026-07-11 01:10 am NW 3.9 3.9----30.00- 53.2- 52.5---
2026-07-11 01:00 amNNW 3.9 3.9----30.01+0.00 53.4- 52.7---
2026-07-11 12:50 amNNW 3.9 5.8 3.3 86.1 NW30.01- 53.8- 53.1---
2026-07-11 12:40 amNNW 3.9 5.8 3.3-6.1 NW30.01- 53.8- 53.1---
2026-07-11 12:30 amNNW 3.9 5.8----30.01- 53.8- 53.1---
2026-07-11 12:20 amNNW 3.9 5.8 3.3 86.1 NW30.01- 53.6- 52.9---
2026-07-11 12:10 amWNW 5.8 5.8 3.3-6.1 NW30.01- 53.8- 53.1---
2026-07-11 12:00 am W 5.8 5.8----30.01+0.00 54.0- 53.2---
2026-07-10 11:50 pm W 5.8 5.8 3.3 86.2 NW30.01- 54.1- 53.4---
2026-07-10 11:40 pm W 5.8 5.8----30.01- 54.3- 53.6---
2026-07-10 11:30 pm W 5.8 7.8----30.01- 54.5- 53.8---
2026-07-10 11:20 pm W 3.9 5.8 3.3 86.0 NW30.01- 54.5- 53.8---
2026-07-10 11:10 pmWSW 3.9 5.8 3.3-6.0 NW30.01- 54.5- 53.8---
2026-07-10 11:00 pmWSW 3.9 5.8----30.02+0.03 54.5- 53.8---
2026-07-10 10:50 pmWSW 3.9 3.9 3.3 86.2 NW30.02- 54.5- 53.8---
2026-07-10 10:40 pmWSW 1.9 3.9----30.02- 54.5- 53.8---
2026-07-10 10:30 pmWSW 3.9 3.9----30.02- 54.5- 53.8---
2026-07-10 10:20 pm W 1.9 3.9 3.3 86.4 NW30.01- 54.5- 53.8---
2026-07-10 10:10 pmWNW 1.9 3.9 3.3-6.4 NW30.01- 54.5- 53.8---
2026-07-10 10:00 pmNNW 1.9 1.9----30.01+0.03 54.5- 53.8---
2026-07-10 09:50 pm N 1.9 1.9 3.0 86.2WNW30.01- 54.7- 54.0---
2026-07-10 09:40 pmNNE 1.9 3.9----30.01- 54.7- 54.0---
2026-07-10 09:30 pmNNE 3.9 3.9----30.01- 54.7- 54.0---
2026-07-10 09:20 pm N 3.9 5.8 3.3 86.3WNW30.00- 54.9- 54.0---
2026-07-10 09:10 pm N 5.8 5.8 3.3-6.3WNW30.01- 55.2- 53.8---
2026-07-10 09:00 pm N 3.9 3.9----30.00+0.01 55.4- 53.8---
2026-07-10 08:50 pm N 3.9 3.9 3.0 86.0 NW30.00- 55.6- 53.8---
2026-07-10 08:40 pmNNW 3.9 5.8----30.00- 55.8- 53.8---
2026-07-10 08:30 pmNNW 5.8 7.8----30.00- 55.8- 53.8---
2026-07-10 08:20 pmNNW 7.8 9.7 3.0 86.0 NW29.99- 56.1- 53.8---
2026-07-10 08:10 pmNNW 9.7 13.6----29.99- 56.3- 53.6---
2026-07-10 08:00 pm NW 7.8 11.7----29.99+0.00 56.1- 53.8---
2026-07-10 07:50 pmWNW 3.9 5.8 3.3 86.0WNW29.98- 55.9- 53.8---

Wave Summary
for 46027 as of
(7:40 pm PDT on 07/11/2026)
0240 GMT on 07/12/2026:

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): 4.9 ft
5-day plot - Swell Height Swell Height (SwH): 3.3 ft
5-day plot - Swell Period Swell Period (SwP): 9.1 sec
5-day plot - Swell Direction Swell Direction (SwD):NNW
5-day plot - Wind Wave Height Wind Wave Height (WWH): 3.9 ft
5-day plot - Wind Wave Period Wind Wave Period (WWP): 4.2 sec
5-day plot - Wind Wave Direction Wind Wave Direction (WWD):NNW
5-day plot - Wave Steepness Wave Steepness (STEEPNESS): AVERAGE
5-day plot - Average Wave Period Average Wave Period (APD): 4.7 sec
Previous observations
TIME
(PDT)
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
2026-07-11 07:10 pm 4.9 3.6 8.3WNW 3.6 4.0 NNW AVERAGE 4.8
2026-07-11 06:40 pm 4.6 3.0 9.1 NW 3.3 3.7 NNW AVERAGE 4.7
2026-07-11 06:10 pm 4.6 3.3 9.1WNW 3.3 3.8 NNW SWELL 4.7
2026-07-11 05:40 pm 4.3 3.3 9.1 NW 3.0 3.7 NNW SWELL 4.9
2026-07-11 05:10 pm 4.3 3.0 9.1WNW 2.6 3.4 NNW SWELL 5.0
2026-07-11 04:40 pm 3.6 2.6 9.1 NW 2.3 3.4 NNW SWELL 4.8
2026-07-11 04:10 pm 3.9 3.3 9.1 NW 2.0 3.4 NNW SWELL 5.1
2026-07-11 03:40 pm 3.9 3.3 8.3 NW 2.3 5.6 WNW AVERAGE 5.3
2026-07-11 03:10 pm 3.6 3.0 8.3 NW 2.0 3.0 NNW AVERAGE 5.1
2026-07-11 02:40 pm 3.6 3.3 9.1 NW 2.0 3.1 NNW SWELL 5.4
2026-07-11 02:10 pm 3.6 3.3 7.7 NW 2.0 5.3 WNW AVERAGE 5.4
2026-07-11 01:40 pm 3.6 3.0 7.7 NW 2.0 5.3 NW AVERAGE 4.9
2026-07-11 01:10 pm 3.6 3.0 9.1 NW 2.0 3.0 NNW SWELL 5.0
2026-07-11 12:40 pm 3.6 3.0 10.0WNW 2.0 3.1 NW SWELL 4.9
2026-07-11 12:10 pm 3.6 3.0 7.7WNW 2.0 5.3 WNW AVERAGE 4.8
2026-07-11 11:40 am 3.6 3.3 8.3 NW 1.6 2.7 NNW AVERAGE 5.3
2026-07-11 11:10 am 3.6 3.3 9.1WNW 1.6 5.0 WNW SWELL 5.8
2026-07-11 10:40 am 3.3 3.0 9.1 NW 1.3 5.0 W SWELL 6.1
2026-07-11 10:10 am 3.3 3.0 7.7WNW 0.7 3.6 W AVERAGE 6.4
2026-07-11 09:40 am 3.0 3.0 8.3WNW 0.7 2.6 NW SWELL 6.3
2026-07-11 09:10 am 3.3 3.0 7.7 W 1.0 3.1 WNW AVERAGE 6.4
2026-07-11 08:40 am 2.6 2.6 7.7WNW 0.7 4.0 W AVERAGE 6.1
2026-07-11 08:10 am 3.0 2.6 7.7WNW 0.7 4.0 WNW AVERAGE 6.4
2026-07-11 07:40 am 3.3 3.0 8.3WNW 1.0 3.7 W SWELL 6.4
2026-07-11 07:10 am 3.0 3.0 14.8SSW 0.7 3.2 WNW SWELL 6.3
2026-07-11 06:40 am 3.0 3.0 8.3WNW 0.7 3.7 WNW SWELL 6.5
2026-07-11 06:10 am 3.0 2.6 7.7WNW 0.7 3.8 WNW AVERAGE 6.3
2026-07-11 05:40 am 3.0 2.6 8.3WNW 1.0 4.0 W SWELL 6.1
2026-07-11 05:10 am 3.0 3.0 7.7WNW 1.0 4.0 NW AVERAGE 6.3
2026-07-11 04:40 am 3.0 3.0 7.1WNW 1.0 3.7 WSW AVERAGE 6.2
2026-07-11 04:10 am 3.0 3.0 16.0SSW 1.0 3.3 WNW SWELL 6.5
2026-07-11 03:40 am 3.0 3.0 8.3WNW 1.0 3.8 W SWELL 6.1
2026-07-11 03:10 am 3.0 3.0 8.3WNW 1.0 3.8 WNW SWELL 6.3
2026-07-11 02:40 am 3.0 3.0 7.7 NW 1.0 3.8 W AVERAGE 6.3
2026-07-11 02:10 am 3.3 3.0 7.7WNW 1.0 3.8 W AVERAGE 6.4
2026-07-11 01:40 am 3.0 3.0 13.8SSW 1.0 3.4 WNW SWELL 6.2
2026-07-11 01:10 am 3.3 3.3 7.7WNW 1.0 3.8 W AVERAGE 6.2
2026-07-11 12:40 am 3.3 3.0 7.7 NW 1.0 4.0 NW AVERAGE 6.1
2026-07-11 12:10 am 3.3 3.0 7.7 NW 1.0 2.9 NNW AVERAGE 6.1
2026-07-10 11:40 pm 3.3 3.3 7.7 NW 1.0 3.2 NNW AVERAGE 6.2
2026-07-10 11:10 pm 3.3 3.0 7.7 NW 1.0 3.0 NNW AVERAGE 6.0
2026-07-10 10:40 pm 3.3 3.3 8.3 NW 1.0 3.8 WNW SWELL 6.2
2026-07-10 10:10 pm 3.3 3.3 7.7 NW 1.0 3.3 NW AVERAGE 6.4
2026-07-10 09:40 pm 3.0 3.0 7.7WNW 1.0 3.7 NNW AVERAGE 6.2
2026-07-10 09:10 pm 3.3 3.0 8.3WNW 1.0 4.0 WNW SWELL 6.3
2026-07-10 08:40 pm 3.0 3.0 8.3 NW 1.0 4.0 NW SWELL 6.0
2026-07-10 08:10 pm 3.0 2.6 8.3 NW 1.3 4.2 WNW SWELL 6.0

Plot icon Plot of wave energy versus frequency (and period)