Station 51004 (LLNR 28005) - SOUTHEAST HAWAII - 205 NM Southeast of Hilo, HI Image indicating link to RSS feed of recent meteorological observations for station 51004


Conditions at 51004 as of
(9:10 pm HAST on 06/20/2024)
0710 GMT on 06/21/2024:
     

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): E ( 80 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 17.5 kts
5-day plot - Wind Gust Wind Gust (GST): 23.3 kts
5-day plot - Wave Height Wave Height (WVHT): 7.2 ft
5-day plot - Average Wave Period Average Period (APD): 5.9 sec
5-day plot - Mean Wave Direction Mean Wave Direction (MWD): E ( 91 deg true )
5-day plot - Air Temperature Air Temperature (ATMP): 76.1 °F
5-day plot - Water Temperature Water Temperature (WTMP): 78.3 °F
5-day plot - Dew Point Dew Point (DEWP): 70.0 °F
5-day plot - Wind Speed at 10 Meters Wind Speed at 10 meters (WSPD10M): 19.4 kts
5-day plot - Wind Speed at 20 Meters Wind Speed at 20 meters (WSPD20M): 21.4 kts
5-day plot -  Wind Speed, Wind Gust and Atmospheric Pressure Combined plot of Wind Speed, Gust, and Air Pressure
Supplemental Measurements
Highest 1-minute Wind Speed
Time (HAST)5-day plot - 1-Minute Wind Speed WSPD 5-day plot - 1-Minute Wind Direction WDIR
9:04 pm 19.4 kts-
Previous observations
TIME
(HAST)
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
2024-06-20 09:00 pm E 15.5 21.4------ 76.3 78.3 70.9---
2024-06-20 08:50 pmENE 17.5 21.4 6.6 85.7ENE-- 76.5 78.3 70.3---
2024-06-20 08:40 pm E 17.5 23.3------ 76.5 78.3 70.2---
2024-06-20 08:30 pm E 17.5 21.4------ 75.7 78.3 69.8---
2024-06-20 08:20 pm E 19.4 25.3 7.2 75.8ENE-- 75.0 78.3 70.2---
2024-06-20 08:10 pm E 19.4 25.3 7.2-5.8ENE-- 76.3 78.3 70.2---
2024-06-20 08:00 pmENE 17.5 21.4------ 76.3 78.3 70.2---
2024-06-20 07:50 pmENE 17.5 21.4 6.9 75.8ENE-- 75.9 78.3 70.3---
2024-06-20 07:40 pmENE 17.5 21.4------ 75.7 78.3 70.0---
2024-06-20 07:30 pmENE 17.5 21.4------ 75.7 78.3 69.6---
2024-06-20 07:20 pmENE 17.5 21.4 7.2 85.8ENE-- 75.4 78.3 70.2---
2024-06-20 07:10 pmENE 17.5 21.4------ 75.7 78.3 70.5---
2024-06-20 07:00 pmENE 15.5 21.4------ 75.7 78.3 70.3---
2024-06-20 06:50 pmENE 17.5 21.4 7.2 85.9ENE-- 75.4 78.3 70.3---
2024-06-20 06:40 pmENE 15.5 19.4 7.2-5.9ENE-- 75.0 78.3 70.3---
2024-06-20 06:30 pmENE 17.5 23.3------ 75.2 78.3 70.2---
2024-06-20 06:20 pmENE 19.4 23.3 6.9 86.0 E-- 76.3 78.3 70.2---
2024-06-20 06:10 pmENE 19.4 23.3 6.9-6.0 E-- 76.3 78.3 69.8---
2024-06-20 06:00 pmENE 17.5 27.2------ 76.6 78.3 69.8---
2024-06-20 05:50 pmENE 17.5 21.4 6.9 85.9 E-- 76.6 78.3 69.6---
2024-06-20 05:40 pmENE 15.5 21.4------ 76.6 78.3 69.8---
2024-06-20 05:30 pmENE 17.5 19.4------ 76.5 78.4 69.3---
2024-06-20 05:20 pmENE 17.5 21.4 6.6 85.6ENE-- 76.5 78.4 68.9---
2024-06-20 05:10 pmENE 17.5 21.4 6.6-5.6ENE-- 76.1 78.4 69.3---
2024-06-20 05:00 pmENE 15.5 19.4------ 76.1 78.4 69.3---
2024-06-20 04:50 pmENE 17.5 21.4 6.6 85.7 E-- 76.3 78.4 68.7---
2024-06-20 04:40 pmENE 17.5 21.4------ 76.6 78.4 68.9---
2024-06-20 04:30 pmENE 17.5 21.4------ 76.8 78.4 68.0---
2024-06-20 04:20 pmENE 17.5 21.4 6.9 85.7ENE-- 76.8 78.4 67.8---
2024-06-20 04:10 pmENE 17.5 23.3 6.9-5.7ENE-- 76.6 78.4 69.3---
2024-06-20 04:00 pmENE 15.5 19.4------ 77.2 78.4 68.9---
2024-06-20 03:50 pmENE 15.5 19.4 7.2 86.1 E-- 77.2 78.4 68.9---
2024-06-20 03:40 pmENE 15.5 19.4 7.2-6.1 E-- 77.2 78.4 68.5---
2024-06-20 03:30 pmENE 15.5 19.4------ 77.0 78.4 68.5---
2024-06-20 03:20 pmENE 15.5 19.4 6.9 85.9 E-- 77.0 78.4 68.7---
2024-06-20 03:10 pmENE 15.5 17.5 6.9-5.9 E-- 77.2 78.4 68.9---
2024-06-20 03:00 pmENE 15.5 19.4------ 77.2 78.4 68.4---
2024-06-20 02:50 pmENE 15.5 19.4 6.6 85.7 E-- 77.2 78.4 68.5---
2024-06-20 02:40 pmENE 15.5 19.4------ 77.2 78.4 68.4---
2024-06-20 02:30 pmENE 17.5 19.4------ 77.2 78.4 68.2---
2024-06-20 02:20 pmENE 15.5 19.4 6.9 86.0ENE-- 77.2 78.4 68.4---
2024-06-20 02:10 pmENE 17.5 21.4 6.9-6.0ENE-- 77.0 78.4 68.0---
2024-06-20 02:00 pmENE 17.5 21.4------ 77.0 78.4 68.0---
2024-06-20 01:50 pmENE 17.5 21.4 6.9 86.1 E-- 77.0 78.4 68.4---
2024-06-20 01:40 pmENE 15.5 19.4------ 77.0 78.3 68.0---
2024-06-20 01:20 pmENE 15.5 19.4 6.9 85.9 E-- 76.8 78.3 68.4---
2024-06-20 01:10 pm E 15.5 21.4------ 77.0 78.3 68.5---
2024-06-20 01:00 pmENE 15.5 19.4------ 77.0 78.3 68.5---
2024-06-20 12:50 pm E 17.5 21.4 6.9 85.9 E-- 76.8 78.3 68.4---
2024-06-20 12:40 pmENE 15.5 21.4------ 76.5 78.3 69.1---
2024-06-20 12:30 pmENE 15.5 19.4------ 76.1 78.3 69.1---
2024-06-20 12:20 pmENE 15.5 17.5 6.6 85.7ENE-- 75.9 78.3 69.4---
2024-06-20 12:10 pmENE 15.5 19.4------ 75.9 78.3 69.1---
2024-06-20 12:00 pm E 15.5 19.4------ 76.5 78.3 68.4---
2024-06-20 11:50 am E 15.5 19.4 6.9 85.8ENE-- 76.3 78.3 68.2---
2024-06-20 11:40 am E 15.5 19.4------ 76.3 78.3 67.6---
2024-06-20 11:30 am E 15.5 21.4------ 76.5 78.3 67.6---
2024-06-20 11:20 am E 15.5 19.4 7.2 86.0ENE-- 76.3 78.3 67.6---
2024-06-20 11:10 am E 15.5 19.4 7.2-6.0ENE-- 76.3 78.3 67.3---
2024-06-20 11:00 am E 17.5 21.4------ 76.3 78.3 67.1---
2024-06-20 10:50 amENE 17.5 21.4 7.2 85.9 E-- 76.3 78.3 66.9---
2024-06-20 10:40 am E 17.5 23.3 7.2-5.9 E-- 75.9 78.3 67.8---
2024-06-20 10:30 am E 15.5 19.4------ 75.4 78.3 69.3---
2024-06-20 10:20 amENE 13.6 19.4 6.9 85.6ENE-- 74.3 78.3 68.9---
2024-06-20 10:10 amENE 15.5 21.4 6.9-5.6ENE-- 73.2 78.3 68.7---
2024-06-20 10:00 amENE 19.4 25.3------ 72.9 78.3 68.4---
2024-06-20 09:50 am E 17.5 21.4 7.2 86.1 E-- 72.7 78.3 68.5---
2024-06-20 09:40 am E 17.5 25.3------ 73.8 78.3 68.2---
2024-06-20 09:30 am E 13.6 15.5------ 75.6 78.3 68.0---
2024-06-20 09:20 am E 13.6 17.5 6.9 85.7ENE-- 75.6 78.3 68.2---
2024-06-20 09:10 am E 15.5 21.4 6.9-5.7ENE-- 75.9 78.3 68.0---
2024-06-20 09:00 amENE 15.5 19.4------ 76.5 78.3 66.9---
2024-06-20 08:50 am E 17.5 21.4 7.2 85.9 E-- 76.5 78.3 65.5---
2024-06-20 08:40 am E 15.5 23.3------ 76.3 78.3 65.7---
2024-06-20 08:30 am E 17.5 21.4------ 75.9 78.3 67.1---
2024-06-20 08:20 am E 17.5 23.3 6.9 75.8ENE-- 76.5 78.3 67.1---
2024-06-20 08:10 am E 17.5 23.3 6.9-5.8ENE-- 76.6 78.3 66.6---
2024-06-20 08:00 am E 15.5 19.4------ 76.1 78.3 67.3---
2024-06-20 07:50 am E 17.5 21.4 6.9 86.0ENE-- 76.1 78.3 67.5---
2024-06-20 07:40 amENE 17.5 19.4------ 75.7 78.1 68.2---
2024-06-20 07:30 amENE 17.5 23.3------ 75.2 78.3 67.6---
2024-06-20 07:20 amENE 17.5 21.4 7.2 86.0 E-- 75.6 78.1 68.5---
2024-06-20 07:10 amENE 17.5 21.4 7.2-6.0 E-- 75.7 78.1 68.7---
2024-06-20 07:00 amENE 17.5 19.4------ 75.7 78.3 68.4---
2024-06-20 06:50 amENE 15.5 19.4 7.2 86.1ENE-- 76.1 78.1 67.8---
2024-06-20 06:40 amENE 15.5 19.4 7.2-6.1ENE-- 76.1 78.3 67.1---
2024-06-20 06:30 amENE 15.5 21.4------ 75.7 78.3 67.1---
2024-06-20 06:20 amENE 13.6 17.5 7.2 85.9ENE-- 75.7 78.3 66.7---
2024-06-20 06:10 am NE 13.6 17.5 7.2-5.9ENE-- 75.4 78.3 66.6---
2024-06-20 06:00 am NE 15.5 19.4------ 75.2 78.3 67.5---
2024-06-20 05:50 amENE 17.5 21.4 6.2 85.8ENE-- 74.8 78.3 67.8---
2024-06-20 05:40 amENE 17.5 23.3------ 75.9 78.3 68.0---
2024-06-20 05:30 amENE 13.6 17.5------ 76.6 78.3 65.7---
2024-06-20 05:20 amENE 13.6 17.5 6.9 85.9 E-- 76.8 78.3 64.8---
2024-06-20 05:10 am E 13.6 15.5 6.9-5.9 E-- 76.8 78.1 63.9---
2024-06-20 05:00 amENE 13.6 17.5------ 77.0 78.3 64.2---
2024-06-20 04:50 amENE 13.6 19.4 7.2 85.8ENE-- 77.0 78.3 63.3---
2024-06-20 04:40 am E 15.5 19.4 7.2-5.8ENE-- 77.2 78.3 62.2---
2024-06-20 04:30 am E 15.5 19.4------ 77.4 78.3 62.1---
2024-06-20 04:20 am E 15.5 19.4 6.9 85.7ENE-- 77.4 78.3 61.7---
2024-06-20 04:10 am E 15.5 19.4 6.9-5.7ENE-- 77.4 78.3 61.9---
2024-06-20 04:00 am E 17.5 21.4------ 77.2 78.3 62.6---
2024-06-20 03:50 am E 19.4 23.3 6.6 85.8ENE-- 77.4 78.3 62.4---
2024-06-20 03:40 am E 19.4 23.3------ 77.2 78.3 62.2---
2024-06-20 03:30 am E 19.4 23.3------ 77.0 78.3 63.0---
2024-06-20 03:20 am E 19.4 23.3 6.9 85.6 E-- 77.2 78.3 63.3---
2024-06-20 03:10 am E 19.4 23.3 6.9-5.6 E-- 77.0 78.3 65.1---
2024-06-20 03:00 amENE 17.5 23.3------ 77.0 78.3 65.8---
2024-06-20 02:50 amENE 17.5 21.4 7.9 86.0 E-- 76.8 78.3 66.0---
2024-06-20 02:40 amENE 19.4 23.3------ 76.8 78.3 66.7---
2024-06-20 02:30 amENE 19.4 23.3------ 76.6 78.3 67.6---
2024-06-20 02:20 amENE 17.5 23.3 7.2 85.8ENE-- 77.7 78.3 65.8---
2024-06-20 02:10 amENE 15.5 19.4 7.2-5.8ENE-- 77.7 78.3 63.7---
2024-06-20 02:00 amENE 17.5 21.4------ 77.5 78.3 63.9---
2024-06-20 01:50 amENE 17.5 21.4 7.5 85.8ENE-- 77.5 78.3 64.2---
2024-06-20 01:40 amENE 17.5 21.4------ 77.9 78.3 63.7---
2024-06-20 01:30 amENE 17.5 21.4------ 77.7 78.3 63.3---
2024-06-20 01:20 amENE 17.5 21.4 7.2 85.9ENE-- 77.5 78.3 64.6---
2024-06-20 01:10 amENE 17.5 23.3 7.2-5.9ENE-- 77.4 78.3 65.3---
2024-06-20 01:00 amENE 17.5 21.4------ 77.5 78.3 66.0---
2024-06-20 12:50 amENE 17.5 23.3 7.2 86.0 E-- 77.4 78.3 66.6---
2024-06-20 12:40 amENE 17.5 23.3------ 77.4 78.3 67.6---
2024-06-20 12:30 amENE 17.5 23.3------ 77.2 78.3 68.0---
2024-06-20 12:20 am E 13.6 21.4 6.9 85.8 E-- 77.0 78.3 68.7---
2024-06-20 12:10 am E 13.6 15.5 6.9-5.8 E-- 76.5 78.3 67.8---
2024-06-20 12:00 am E 11.7 15.5------ 75.7 78.3 67.8---
2024-06-19 11:50 pm E 13.6 19.4 7.2 85.9 E-- 75.7 78.3 67.8---
2024-06-19 11:40 pm E 15.5 19.4 7.2-5.9 E-- 75.7 78.3 67.6---
2024-06-19 11:30 pm E 17.5 23.3------ 74.8 78.3 68.2---
2024-06-19 11:20 pm E 21.4 27.2 6.9 85.9 E-- 75.6 78.3 69.1---
2024-06-19 11:10 pm E 19.4 23.3 6.9-5.9 E-- 76.6 78.3 68.2---
2024-06-19 11:00 pm E 19.4 23.3------ 76.8 78.3 69.1---
2024-06-19 10:50 pm E 17.5 23.3 7.5 86.2ENE-- 76.6 78.3 69.3---
2024-06-19 10:40 pmENE 11.7 15.5 7.5-6.2ENE-- 77.0 78.3 68.5---
2024-06-19 10:30 pmENE 11.7 15.5------ 76.8 78.3 68.0---
2024-06-19 10:20 pm E 11.7 15.5 7.5 86.0ENE-- 76.8 78.3 68.0---
2024-06-19 10:10 pm E 15.5 17.5 7.5-6.0ENE-- 77.0 78.3 67.5---
2024-06-19 10:00 pm E 15.5 17.5------ 77.2 78.3 67.3---
2024-06-19 09:50 pm E 15.5 19.4 7.5 86.0 E-- 77.5 78.3 66.6---
2024-06-19 09:40 pmENE 17.5 21.4------ 77.4 78.3 65.8---
2024-06-19 09:30 pmENE 17.5 21.4------ 77.2 78.3 66.4---
2024-06-19 09:20 pmENE 17.5 21.4 7.2 85.9 E-- 77.4 78.3 66.2---
2024-06-19 09:10 pmENE 17.5 21.4 7.2-5.9 E-- 77.4 78.3 66.7---
2024-06-19 09:00 pmENE 15.5 19.4------ 77.2 78.3 66.7---
2024-06-19 08:50 pmENE 13.6 17.5 7.5 85.9 E-- 76.8 78.3 67.3---

Detailed Wave Summary
for 51004 as of
(9:10 pm HAST on 06/20/2024)
0710 GMT on 06/21/2024:

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): 7.2 ft
5-day plot - Swell Height Swell Height (SwH): 2.6 ft
5-day plot - Swell Period Swell Period (SwP): 11.4 sec
5-day plot - Swell Direction Swell Direction (SwD): SE
5-day plot - Wind Wave Height Wind Wave Height (WWH): 6.6 ft
5-day plot - Wind Wave Period Wind Wave Period (WWP): 8.3 sec
5-day plot - Wind Wave Direction Wind Wave Direction (WWD): E
5-day plot - Wave Steepness Wave Steepness (STEEPNESS): STEEP
5-day plot - Average Wave Period Average Wave Period (APD): 5.9 sec
Previous observations
TIME
(HAST)
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
2024-06-20 08:40 pm 6.6 2.6 12.9ESE 5.9 8.3 ENE AVERAGE 5.7
2024-06-20 08:10 pm 7.2 2.0 11.4 E 6.9 7.1 ENE STEEP 5.8
2024-06-20 07:40 pm 6.9 2.3 13.8SSE 6.6 7.1 ENE STEEP 5.8
2024-06-20 07:10 pm 7.2 2.3 13.8SSE 6.9 7.7 ENE STEEP 5.8
2024-06-20 06:40 pm 7.2 3.9 12.9ESE 6.2 7.7 ENE STEEP 5.9
2024-06-20 06:10 pm 6.9 2.6 12.9 SE 6.2 8.3 E AVERAGE 6.0
2024-06-20 05:40 pm 6.9 4.3 8.3 E 5.6 4.5 ENE AVERAGE 5.9
2024-06-20 05:10 pm 6.6 2.3 13.8 SE 6.2 7.7 ENE STEEP 5.6
2024-06-20 04:40 pm 6.6 2.3 10.8ESE 6.2 8.3 E AVERAGE 5.7
2024-06-20 04:10 pm 6.9 2.6 12.9 SE 6.2 7.7 ENE STEEP 5.7
2024-06-20 03:40 pm 7.2 4.3 10.8 SE 5.9 7.7 E STEEP 6.1
2024-06-20 03:10 pm 6.9 4.6 8.3 E 5.2 5.9 ENE AVERAGE 5.9
2024-06-20 02:40 pm 6.6 3.9 8.3 E 5.6 6.7 E AVERAGE 5.7
2024-06-20 02:10 pm 6.9 3.0 13.8SSE 6.2 7.7 ENE STEEP 6.0
2024-06-20 01:40 pm 6.9 3.9 8.3 E 5.9 4.8 ENE AVERAGE 6.1
2024-06-20 01:10 pm 6.9 3.6 8.3 E 5.9 5.6 E AVERAGE 5.9
2024-06-20 12:40 pm 6.9 4.6 7.7 E 5.2 6.7 ENE STEEP 5.9
2024-06-20 12:10 pm 6.6 3.3 8.3ENE 5.6 6.2 E AVERAGE 5.7
2024-06-20 11:40 am 6.9 3.6 8.3ENE 5.9 5.6 ENE AVERAGE 5.8
2024-06-20 11:10 am 7.2 3.9 8.3ENE 5.9 5.9 ENE STEEP 6.0
2024-06-20 10:40 am 7.2 2.6 11.4 SE 6.6 8.3 E STEEP 5.9
2024-06-20 10:10 am 6.9 3.0 8.3ENE 5.9 5.9 E AVERAGE 5.6
2024-06-20 09:40 am 7.2 2.6 12.9ESE 6.9 8.3 E STEEP 6.1
2024-06-20 09:10 am 6.9 5.2 8.3ENE 4.6 5.0 ENE AVERAGE 5.7
2024-06-20 08:40 am 7.2 3.9 8.3 E 5.9 7.1 E STEEP 5.9
2024-06-20 08:10 am 6.9 2.6 14.8 W 6.2 7.1 ENE STEEP 5.8
2024-06-20 07:40 am 6.9 4.6 8.3ENE 5.2 6.7 E AVERAGE 6.0
2024-06-20 07:10 am 7.2 2.3 12.1 E 6.9 8.3 E STEEP 6.0
2024-06-20 06:40 am 7.2 3.9 12.9SSW 6.2 7.7 ENE STEEP 6.1
2024-06-20 06:10 am 7.2 5.2 8.3ENE 4.9 6.7 ENE STEEP 5.9
2024-06-20 05:40 am 6.2 2.3 10.8 E 5.9 7.7 ENE STEEP 5.8
2024-06-20 05:10 am 6.9 5.6 7.7 E 4.3 5.9 ENE STEEP 5.9
2024-06-20 04:40 am 7.2 4.6 8.3ENE 5.2 6.2 E STEEP 5.8
2024-06-20 04:10 am 6.9 3.6 8.3ENE 5.9 5.3 ENE AVERAGE 5.7
2024-06-20 03:40 am 6.6 3.3 8.3ENE 5.9 6.7 E AVERAGE 5.8
2024-06-20 03:10 am 6.9 2.0 12.9NNW 6.6 8.3 E AVERAGE 5.6
2024-06-20 02:40 am 7.9 2.3 12.1 E 7.5 7.7 E STEEP 6.0
2024-06-20 02:10 am 7.2 3.3 14.8SSE 6.6 7.7 ENE STEEP 5.8
2024-06-20 01:40 am 7.5 2.3 12.9 S 7.2 7.7 ENE STEEP 5.8
2024-06-20 01:10 am 7.2 0.0-- 7.2 8.3 ENE STEEP 5.9
2024-06-20 12:40 am 7.2 2.6 12.9NNE 6.6 7.7 E STEEP 6.0
2024-06-20 12:10 am 6.9 5.2 7.7 E 4.3 4.8 ENE STEEP 5.8
2024-06-19 11:40 pm 7.2 3.9 16.0 SW 6.2 7.7 E STEEP 5.9
2024-06-19 11:10 pm 6.9 2.3 12.9WSW 6.6 7.7 E STEEP 5.9
2024-06-19 10:40 pm 7.5 6.6 7.7ENE 3.6 5.6 ENE STEEP 6.2
2024-06-19 10:10 pm 7.5 5.2 7.7ENE 5.6 5.9 ENE STEEP 6.0
2024-06-19 09:40 pm 7.5 3.9 8.3 E 6.2 7.1 ENE STEEP 6.0
2024-06-19 09:10 pm 7.2 2.3 12.9 S 6.9 7.7 E STEEP 5.9

Plot of wave energy versus frequency (and period)