Station 42040 (LLNR 245) - LUKE OFFSHORE TEST PLATFORM - 63 NM South of Dauphin Island, AL Image indicating link to RSS feed of recent meteorological observations for station 42040


Conditions at 42040 as of
(8:00 pm CST on 11/30/2023)
0200 GMT on 12/01/2023:
     

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):SSE ( 150 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 19.4 kts
5-day plot - Wind Gust Wind Gust (GST): 27.2 kts
5-day plot - Atmospheric Pressure Atmospheric Pressure (PRES):30.01 in
5-day plot - Pressure Tendency Pressure Tendency (PTDY):+0.05 in ( Rising )
5-day plot - Air Temperature Air Temperature (ATMP): 71.6 °F
5-day plot - Water Temperature Water Temperature (WTMP): 74.1 °F
5-day plot - Dew Point Dew Point (DEWP): 61.7 °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
Highest 1-minute Wind Speed
Time (CST)5-day plot - 1-Minute Wind Speed WSPD 5-day plot - 1-Minute Wind Direction WDIR
7:56 pm 23.3 kts-
Previous observations
TIME
(CST)
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
2023-11-30 07:50 pmSSE 19.4 23.3 5.2 54.6 SE30.01- 71.6 74.1 62.1---
2023-11-30 07:40 pmSSE 19.4 23.3----30.01-------
2023-11-30 07:30 pmSSE 19.4 23.3----30.01- 71.6 74.1 61.5---
2023-11-30 07:20 pmSSE 19.4 23.3 4.9 64.5 SE30.01- 71.6 74.1 60.6---
2023-11-30 07:10 pm SE 17.5 23.3 4.9-4.5 SE30.01- 71.6 74.1 59.4---
2023-11-30 07:00 pm SE 17.5 21.4----30.01+0.04 71.8 74.1 56.7---
2023-11-30 06:50 pm SE 17.5 23.3 4.9 64.5 SE30.01- 71.6 74.1 55.0---
2023-11-30 06:40 pm SE 17.5 23.3----30.00-------
2023-11-30 06:30 pm SE 19.4 25.3----30.00- 70.9 74.1 56.7---
2023-11-30 06:20 pm SE 19.4 25.3 5.2 64.6 SE30.00- 70.3 74.1 57.7---
2023-11-30 06:10 pm SE 21.4 25.3 5.2-4.6 SE29.99- 70.2 74.1 56.7---
2023-11-30 06:00 pm SE 21.4 27.2----29.99+0.02 70.2 74.1 57.0---
2023-11-30 05:50 pm SE 19.4 25.3 5.2 64.5 SE29.99- 70.2 74.1 57.7---
2023-11-30 05:00 pm SE 21.4 25.3 5.6-4.4 SE29.96-0.06 69.4 74.1 57.9---
2023-11-30 04:50 pm SE 21.4 27.2 4.6 54.1 SE29.96- 69.4 74.1 57.7---
2023-11-30 04:40 pm SE 21.4 27.2----29.96- 69.3 74.1 57.6---
2023-11-30 04:30 pm SE 23.3 27.2----29.96- 69.1 74.1 56.7---
2023-11-30 04:20 pm SE 21.4 29.1 4.3 54.0 SE29.96- 68.9 74.1 57.4---
2023-11-30 04:10 pm SE 23.3 29.1 4.3-4.0 SE29.96- 68.7 74.1 57.9---
2023-11-30 04:00 pm SE 23.3 29.1----29.96-0.09 68.9- 57.6---
2023-11-30 03:50 pm SE 23.3 29.1 3.9 53.9 SE29.97- 68.5 74.1 57.4---
2023-11-30 03:40 pm SE 23.3 31.1----29.97- 68.5 74.1 57.9---
2023-11-30 03:30 pm SE 25.3 29.1----29.97- 68.4 74.1 57.6---
2023-11-30 03:20 pm SE 25.3 29.1 3.9 43.8ESE29.97- 68.4 74.1 57.4---
2023-11-30 03:10 pm SE 25.3 31.1 3.9-3.8ESE29.97- 68.0 74.1 56.3---
2023-11-30 03:00 pm SE 25.3 31.1----29.97-0.16 68.0- 56.5---
2023-11-30 02:50 pm SE 25.3 31.1 3.3 43.7ESE29.99- 68.0 74.3 56.8---
2023-11-30 02:40 pm SE 23.3 29.1----29.98- 67.6 74.1 56.7---
2023-11-30 02:30 pm SE 23.3 27.2----29.99- 67.3 74.1 56.5---
2023-11-30 02:20 pm- 21.4 27.2 3.0-3.6ESE-- 66.9 74.3 56.5---
2023-11-30 02:10 pm SE 21.4 27.2 3.0-3.6ESE30.01- 66.7 74.3 55.9---
2023-11-30 02:00 pm SE 19.4 25.3----30.02-0.16 66.7- 55.6---
2023-11-30 01:50 pm SE 19.4 23.3 2.6 43.4ESE30.03- 67.1 74.3 55.4---
2023-11-30 01:40 pm SE 19.4 25.3----30.04- 66.9 74.3 55.0---
2023-11-30 01:30 pm SE 17.5 23.3----30.04-------
2023-11-30 01:20 pm SE 17.5 21.4 2.3 43.6 E30.05- 66.6 74.3 55.0---
2023-11-30 01:10 pm SE 15.5 19.4 2.3-3.6 E30.05- 66.6 74.3 54.5---
2023-11-30 01:00 pm SE 13.6 17.5----30.06-0.12 66.7- 54.5---
2023-11-30 12:50 pm SE 13.6 17.5 2.0 43.5 E30.07- 66.6 74.1 53.6---
2023-11-30 12:40 pm SE 15.5 19.4----30.09- 66.6 74.3 53.4---
2023-11-30 12:30 pm SE 13.6 17.5----30.10- 66.6 74.3 53.1---
2023-11-30 12:20 pmSSE 13.6 17.5 2.3 43.7 E30.11- 66.6 74.1 52.7---
2023-11-30 12:10 pmSSE 11.7 15.5 2.3-3.7 E30.12- 66.6 74.3 52.5---
2023-11-30 12:00 pmSSE 9.7 13.6----30.13-0.04 66.4 74.3 51.6---
2023-11-30 11:50 amSSE 9.7 15.5 2.0 43.6 E30.14- 66.4 74.3 51.8---
2023-11-30 11:40 amSSE 7.8 11.7----30.15- 66.2 74.3 51.8---
2023-11-30 11:30 amSSE 7.8 11.7----30.16- 66.2 74.3 51.8---
2023-11-30 11:20 amSSE 7.8 11.7 2.3 43.6 E30.17- 66.2 74.3 51.8---
2023-11-30 11:10 amSSE 7.8 11.7 2.3-3.6 E30.17- 66.0 74.3 51.3---
2023-11-30 11:00 am SE 7.8 13.6----30.18+0.01 66.2 74.3 51.8---
2023-11-30 10:50 amSSE 7.8 11.7 2.3 43.6ESE30.19- 66.0 74.3 51.3---
2023-11-30 10:40 amSSE 5.8 9.7----30.19- 65.8 74.3 51.1---
2023-11-30 10:30 am SE 7.8 13.6----30.19- 65.8 74.3 51.6---
2023-11-30 10:20 am SE 9.7 13.6 2.3 43.6ESE30.19- 65.8 74.3 51.6---
2023-11-30 10:10 am SE 9.7 11.7 2.3-3.6ESE30.19- 65.8 74.3 51.8---
2023-11-30 10:00 am SE 9.7 13.6----30.18+0.03 65.7 74.3 50.7---
2023-11-30 09:50 amESE 11.7 13.6 2.3 43.5ESE30.18- 65.7 74.3 50.9---
2023-11-30 09:40 amESE 9.7 13.6----30.18- 65.5 74.3 50.9---
2023-11-30 09:30 am SE 9.7 13.6----30.18- 65.7 74.3 51.6---
2023-11-30 09:20 amESE 9.7 13.6 2.3 43.5ESE30.18- 65.5 74.3 51.3---
2023-11-30 09:10 amESE 11.7 15.5 2.3-3.5ESE30.18- 65.5 74.3 50.5---
2023-11-30 09:00 amESE 11.7 15.5----30.17+0.04 65.1 74.1 50.4---
2023-11-30 08:50 amESE 11.7 17.5 2.6 43.6 E30.16- 65.3 74.3 51.3---
2023-11-30 08:40 amESE 11.7 19.4----30.16- 65.3 74.3 51.1---
2023-11-30 08:30 amESE 13.6 17.5----30.16- 65.3 74.3 50.9---
2023-11-30 08:20 am SE 13.6 17.5 2.3 43.4 E30.17- 65.3 74.3 50.4---
2023-11-30 08:10 amESE 11.7 17.5 2.3-3.4 E30.17- 64.9 74.3 50.2---
2023-11-30 08:00 amESE 13.6 17.5----30.16+0.04 64.9 74.3 50.7---
2023-11-30 07:50 amESE 13.6 19.4 2.3 43.4 E30.16- 64.9 74.3 50.4---
2023-11-30 07:40 amESE 15.5 17.5----30.15- 64.9 74.3 50.9---
2023-11-30 07:30 am E 15.5 19.4----30.14- 64.8 74.3 50.2---
2023-11-30 07:20 amESE 13.6 19.4 2.3 43.4 E30.14- 64.6 74.3 49.8---
2023-11-30 07:10 amESE 13.6 17.5 2.3-3.4 E30.14- 64.8 74.3 50.7---
2023-11-30 07:00 amESE 13.6 19.4----30.15+0.00 64.4 74.3 50.0---
2023-11-30 06:50 am E 13.6 19.4 2.0 33.3 E30.14- 64.4 74.3 49.6---
2023-11-30 06:40 amESE 13.6 17.5 2.0-3.3 E30.13- 64.0 74.3 48.6---
2023-11-30 06:30 am E 13.6 17.5----30.13- 63.9 74.3 49.6---
2023-11-30 06:20 amESE 13.6 17.5 2.0 43.3 E30.13- 63.9 74.3 49.3---
2023-11-30 06:10 am E 11.7 17.5 2.0-3.3 E30.14- 63.7 74.3 48.2---
2023-11-30 06:00 amESE 13.6 17.5----30.13-0.03 63.7 74.3 48.7---
2023-11-30 05:50 am E 13.6 19.4 2.0 33.2 E30.13- 63.7 74.3 48.4---
2023-11-30 05:40 am E 13.6 19.4----30.13- 63.7 74.3 48.7---
2023-11-30 05:30 am E 13.6 19.4----30.13- 63.5 74.3 49.5---
2023-11-30 05:20 am E 13.6 17.5 1.6 33.3ESE30.13- 63.1 74.3 47.5---
2023-11-30 05:10 am E 13.6 17.5----30.13- 63.3 74.3 47.7---
2023-11-30 05:00 am E 11.7 17.5----30.12-0.05 63.1 74.3 46.2---
2023-11-30 04:50 am E 13.6 17.5 1.3 33.2 E30.13- 63.0 74.3 46.2---
2023-11-30 04:40 am E 11.7 15.5----30.13- 63.1 74.3 46.8---
2023-11-30 04:30 am E 13.6 15.5----30.13- 62.8 74.3 45.7---
2023-11-30 04:20 am E 11.7 17.5 1.3 33.2 E30.13- 62.8 74.3 46.9---
2023-11-30 04:10 am E 11.7 15.5 1.3-3.2 E30.14- 62.6 74.3 47.1---
2023-11-30 04:00 am E 9.7 13.6----30.14-0.05 62.6 74.3 47.3---
2023-11-30 03:50 am E 11.7 15.5 1.3 43.3 E30.14- 62.8 74.3 46.0---
2023-11-30 03:40 am E 9.7 13.6 1.3-3.3 E30.14-- 74.3----
2023-11-30 03:30 am E 9.7 13.6----30.15-------
2023-11-30 03:20 am E 9.7 15.5 1.3 43.3 E30.15- 62.8 74.3 45.3---
2023-11-30 03:10 am E 9.7 13.6 1.3-3.3 E30.16- 62.6 74.3 45.3---
2023-11-30 03:00 amESE 9.7 13.6----30.16-0.04 62.4 74.3 44.8---
2023-11-30 02:50 am E 11.7 15.5 1.3 43.4ENE30.16- 62.4 74.3 45.0---
2023-11-30 02:40 am E 9.7 13.6----30.16- 62.4 74.3 45.0---
2023-11-30 02:30 am E 9.7 13.6----30.16- 62.4 74.3 44.6---
2023-11-30 02:20 amESE 9.7 13.6 1.3 43.3ENE30.17- 62.2 74.3 44.6---
2023-11-30 02:10 am E 7.8 13.6 1.3-3.3ENE30.17- 62.1 74.3 44.8---
2023-11-30 02:00 am E 9.7 13.6----30.17-0.05 62.1 74.3 45.7---
2023-11-30 01:50 am E 9.7 13.6 1.3 43.4 E30.18- 61.9 74.3 45.7---
2023-11-30 01:40 amESE 7.8 11.7----30.18-- 74.3----
2023-11-30 01:30 am E 7.8 13.6----30.18-------
2023-11-30 01:20 am E 9.7 15.5 1.3 43.4ENE30.18- 61.5 74.3 45.1---
2023-11-30 01:10 am E 9.7 13.6 1.3-3.4ENE30.19- 61.5 74.3 44.6---
2023-11-30 01:00 am E 7.8 13.6----30.19-0.04- 74.3----
2023-11-30 12:50 am E 9.7 13.6 1.3 43.5ENE30.20- 61.3 74.3 43.5---
2023-11-30 12:40 am E 7.8 13.6----30.19- 61.2 74.3 43.9---
2023-11-30 12:30 am E 7.8 13.6----30.20- 61.0 74.3 42.3---
2023-11-30 12:20 am E 7.8 13.6 1.6 43.6ENE30.20- 61.0 74.3 42.6---
2023-11-30 12:10 am E 7.8 13.6 1.6-3.6ENE30.20- 61.2 74.3 42.6---
2023-11-30 12:00 am E 7.8 11.7----30.20-0.03 61.0- 42.3---
2023-11-29 11:50 pmENE 7.8 11.7 1.6 43.6 E30.21- 60.8 74.3 40.5---
2023-11-29 11:40 pm E 7.8 9.7----30.21- 61.0 74.3 41.2---
2023-11-29 11:30 pm E 7.8 11.7----30.22- 60.6 74.3 39.9---
2023-11-29 11:20 pm E 9.7 13.6 1.6 53.7 E30.22- 60.8 74.3 39.4---
2023-11-29 11:10 pmENE 5.8 9.7 1.6-3.7 E30.22- 60.6 74.3 39.9---
2023-11-29 11:00 pmENE 7.8 11.7----30.22-0.01 60.6 74.3 40.3---
2023-11-29 10:50 pm E 5.8 11.7 1.6 53.6ENE30.22- 60.6 74.3 41.4---
2023-11-29 10:40 pmENE 5.8 9.7 1.6-3.6ENE30.22- 60.4 74.3 40.5---
2023-11-29 10:30 pm E 7.8 11.7----30.22- 60.4 74.3 40.3---
2023-11-29 10:20 pmENE 7.8 11.7 2.0 53.6 E30.23- 60.3 74.3 40.1---
2023-11-29 10:10 pm E 5.8 11.7 2.0-3.6 E30.23- 60.3 74.3 40.5---
2023-11-29 10:00 pm E 7.8 11.7----30.23-0.01 60.3 74.3 41.4---
2023-11-29 09:50 pmENE 7.8 13.6 2.0 53.7ENE30.23- 60.3 74.3 41.5---
2023-11-29 09:40 pmENE 9.7 13.6----30.23- 60.1 74.3 41.4---
2023-11-29 09:30 pmENE 7.8 11.7----30.23- 60.3 74.3 42.4---
2023-11-29 09:20 pmENE 9.7 13.6 2.0 53.6ENE30.22- 60.1 74.3 41.4---
2023-11-29 09:10 pmENE 9.7 13.6 2.0-3.6ENE30.23- 60.1 74.3 42.1---
2023-11-29 09:00 pmENE 9.7 15.5----30.23+0.00 60.1 74.3 42.1---
2023-11-29 08:50 pmENE 9.7 13.6 2.0 53.7ENE30.23- 60.1 74.3 42.4---
2023-11-29 08:40 pmENE 9.7 13.6----30.23- 59.9 74.3 40.6---
2023-11-29 08:30 pmENE 9.7 13.6----30.24- 60.1 74.3 40.5---
2023-11-29 08:20 pmENE 7.8 11.7 2.0 53.7 E30.23- 59.9 74.5 39.2---
2023-11-29 08:10 pmENE 9.7 13.6----30.24- 59.9 74.3 38.3---
2023-11-29 08:00 pm NE 9.7 13.6----30.24+0.00 60.1 74.3 39.7---
2023-11-29 07:50 pmENE 9.7 13.6 2.0 53.8ENE30.24- 59.7 74.3 39.9---

Detailed Wave Summary
for 42040 as of
(7:40 pm CST on 11/30/2023)
0140 GMT on 12/01/2023:

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): 5.2 ft
5-day plot - Swell Height Swell Height (SwH): 0.0 ft
5-day plot - Wind Wave Height Wind Wave Height (WWH): 5.2 ft
5-day plot - Wind Wave Period Wind Wave Period (WWP): 5.0 sec
5-day plot - Wind Wave Direction Wind Wave Direction (WWD): SE
5-day plot - Wave Steepness Wave Steepness (STEEPNESS):VERY_STEEP
5-day plot - Average Wave Period Average Wave Period (APD): 4.6 sec
Previous observations
TIME
(CST)
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
2023-11-30 07:10 pm 4.9 0.0 12.1ENE 4.9 5.6 SEVERY_STEEP 4.5
2023-11-30 06:40 pm 4.9 0.3 10.8ESE 4.9 5.6 SEVERY_STEEP 4.5
2023-11-30 06:10 pm 5.2 0.0-- 5.2 5.6 SEVERY_STEEP 4.6
2023-11-30 05:40 pm 5.2 0.3 11.4ESE 5.2 5.6 SEVERY_STEEP 4.5
2023-11-30 05:10 pm 5.6 0.0-- 5.6 4.8 SEVERY_STEEP 4.4
2023-11-30 04:40 pm 4.6 0.3 10.8ESE 4.6 4.8 SEVERY_STEEP 4.1
2023-11-30 04:10 pm 4.3 0.3 7.7 S 4.3 4.5 SEVERY_STEEP 4.0
2023-11-30 03:40 pm 3.9 0.3 9.1SSE 3.9 4.8 SEVERY_STEEP 3.9
2023-11-30 03:10 pm 3.9 0.3 7.1 S 3.9 4.3 ESEVERY_STEEP 3.8
2023-11-30 02:40 pm 3.3 0.3 9.1 S 3.0 4.3 ESEVERY_STEEP 3.7
2023-11-30 02:10 pm 3.0 0.3 6.7SSE 2.6 4.5 ESEVERY_STEEP 3.6
2023-11-30 01:40 pm 2.6 0.3 8.3SSE 2.6 4.3 ESE N/A 3.4
2023-11-30 01:10 pm 2.3 0.3 7.7 S 2.3 4.3 E N/A 3.6
2023-11-30 12:40 pm 2.0 0.3 8.3 E 2.0 4.2 E N/A 3.5
2023-11-30 12:10 pm 2.3 0.7 6.2WSW 2.0 4.3 E N/A 3.7
2023-11-30 11:40 am 2.0 1.3 7.7SSE 1.6 4.0 E N/A 3.6
2023-11-30 11:10 am 2.3 1.3 4.2 E 1.6 3.8 ESE N/A 3.6
2023-11-30 10:40 am 2.3 1.3 4.2ESE 1.6 3.4 ESE N/A 3.6
2023-11-30 10:10 am 2.3 1.3 4.2ESE 1.6 3.6 ESE N/A 3.6
2023-11-30 09:40 am 2.3 0.7 6.2 S 2.3 3.8 ESE N/A 3.5
2023-11-30 09:10 am 2.3 0.3 6.7SSE 2.3 4.0 ESE N/A 3.5
2023-11-30 08:40 am 2.6 0.3 6.7 SW 2.6 4.0 E N/A 3.6
2023-11-30 08:10 am 2.3 0.3 6.7 SE 2.3 3.8 E N/A 3.4
2023-11-30 07:40 am 2.3 0.3 6.7SSE 2.3 3.6 E N/A 3.4
2023-11-30 07:10 am 2.3 0.3 6.2 SW 2.3 3.6 E N/A 3.4
2023-11-30 06:40 am 2.0 0.3 7.1 SW 2.0 3.4 E N/A 3.3
2023-11-30 06:10 am 2.0 0.3 7.1SSW 2.0 3.6 E N/A 3.3
2023-11-30 05:40 am 2.0 0.3 6.2 S 1.6 3.0 E N/A 3.2
2023-11-30 05:10 am 1.6 0.3 6.2 S 1.6 3.3 ESE N/A 3.3
2023-11-30 04:40 am 1.3 0.3 5.9SSE 1.3 3.3 E N/A 3.2
2023-11-30 04:10 am 1.3 0.3 6.2 S 1.3 3.2 E N/A 3.2
2023-11-30 03:40 am 1.3 0.7 5.0 SE 1.3 4.3 E N/A 3.3
2023-11-30 03:10 am 1.3 0.7 5.0 SE 1.3 3.8 E N/A 3.3
2023-11-30 02:40 am 1.3 0.7 5.6SSE 1.3 4.2 ENE N/A 3.4
2023-11-30 02:10 am 1.3 0.7 4.5 E 1.3 3.8 ENE N/A 3.3
2023-11-30 01:40 am 1.3 1.0 4.2 E 1.0 3.2 E N/A 3.4
2023-11-30 01:10 am 1.3 1.0 4.2ENE 1.0 3.6 E N/A 3.4
2023-11-30 12:40 am 1.3 1.0 4.3ENE 1.0 4.0 ENE N/A 3.5
2023-11-30 12:10 am 1.6 1.0 4.3ENE 1.0 3.3 ENE N/A 3.6
2023-11-29 11:40 pm 1.6 1.0 4.2 E 1.3 3.4 E N/A 3.6
2023-11-29 11:10 pm 1.6 1.3 4.8 E 1.3 3.8 ENE N/A 3.7
2023-11-29 10:40 pm 1.6 1.3 4.5ENE 1.3 3.7 E N/A 3.6
2023-11-29 10:10 pm 2.0 1.3 4.8 E 1.3 3.7 ENE N/A 3.6
2023-11-29 09:40 pm 2.0 1.3 4.8ENE 1.3 3.0 ENE N/A 3.7
2023-11-29 09:10 pm 2.0 1.0 5.6ESE 1.6 4.5 ENE N/A 3.6
2023-11-29 08:40 pm 2.0 1.3 4.8ENE 1.6 4.0 ENE N/A 3.7
2023-11-29 08:10 pm 2.0 1.3 5.0 E 1.3 3.8 E N/A 3.7

Plot of wave energy versus frequency (and period)