GWES Probabilistic Wave Height Guidance

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GWES 000 Hour Wave Height  90th Percentile image GWES 006 Hour Wave Height  90th Percentile image
000 Hour Wave Height 90th Percentile

006 Hour Wave Height 90th Percentile

GWES 012 Hour Wave Height  90th Percentile image GWES 018 Hour Wave Height  90th Percentile image
012 Hour Wave Height 90th Percentile

018 Hour Wave Height 90th Percentile

GWES 024 Hour Wave Height  90th Percentile image GWES 030 Hour Wave Height  90th Percentile image
024 Hour Wave Height 90th Percentile

030 Hour Wave Height 90th Percentile

GWES 036 Hour Wave Height  90th Percentile image GWES 042 Hour Wave Height  90th Percentile image
036 Hour Wave Height 90th Percentile

042 Hour Wave Height 90th Percentile

GWES 048 Hour Wave Height  90th Percentile image GWES 054 Hour Wave Height  90th Percentile image
048 Hour Wave Height 90th Percentile

054 Hour Wave Height 90th Percentile

GWES 060 Hour Wave Height  90th Percentile image GWES 066 Hour Wave Height  90th Percentile image
060 Hour Wave Height 90th Percentile

066 Hour Wave Height 90th Percentile

GWES 072 Hour Wave Height  90th Percentile image GWES 078 Hour Wave Height  90th Percentile image
072 Hour Wave Height 90th Percentile

078 Hour Wave Height 90th Percentile

GWES 084 Hour Wave Height  90th Percentile image GWES 090 Hour Wave Height  90th Percentile image
084 Hour Wave Height 90th Percentile

090 Hour Wave Height 90th Percentile

GWES 096 Hour Wave Height  90th Percentile image GWES 102 Hour Wave Height  90th Percentile image
096 Hour Wave Height 90th Percentile

102 Hour Wave Height 90th Percentile

GWES 108 Hour Wave Height  90th Percentile image GWES 114 Hour Wave Height  90th Percentile image
108 Hour Wave Height 90th Percentile

114 Hour Wave Height 90th Percentile

GWES 120 Hour Wave Height  90th Percentile image GWES 126 Hour Wave Height  90th Percentile image
120 Hour Wave Height 90th Percentile

126 Hour Wave Height 90th Percentile

GWES 132 Hour Wave Height  90th Percentile image GWES 138 Hour Wave Height  90th Percentile image
132 Hour Wave Height 90th Percentile

138 Hour Wave Height 90th Percentile

GWES 144 Hour Wave Height  90th Percentile image GWES 150 Hour Wave Height  90th Percentile image
144 Hour Wave Height 90th Percentile

150 Hour Wave Height 90th Percentile

GWES 156 Hour Wave Height  90th Percentile image GWES 162 Hour Wave Height  90th Percentile image
156 Hour Wave Height 90th Percentile

162 Hour Wave Height 90th Percentile

GWES 168 Hour Wave Height  90th Percentile image GWES 174 Hour Wave Height  90th Percentile image
168 Hour Wave Height 90th Percentile

174 Hour Wave Height 90th Percentile

GWES 180 Hour Wave Height  90th Percentile image GWES 186 Hour Wave Height  90th Percentile image
180 Hour Wave Height 90th Percentile

186 Hour Wave Height 90th Percentile

GWES 192 Hour Wave Height  90th Percentile image GWES 198 Hour Wave Height  90th Percentile image
192 Hour Wave Height 90th Percentile

198 Hour Wave Height 90th Percentile

GWES 204 Hour Wave Height  90th Percentile image GWES 210 Hour Wave Height  90th Percentile image
204 Hour Wave Height 90th Percentile

210 Hour Wave Height 90th Percentile

GWES 216 Hour Wave Height  90th Percentile image GWES 222 Hour Wave Height  90th Percentile image
216 Hour Wave Height 90th Percentile

222 Hour Wave Height 90th Percentile

GWES 228 Hour Wave Height  90th Percentile image GWES 234 Hour Wave Height  90th Percentile image
228 Hour Wave Height 90th Percentile

234 Hour Wave Height 90th Percentile

GWES 240 Hour Wave Height  90th Percentile image
240 Hour Wave Height 90th Percentile



Notes on images above:

  • The likelihood of exceedance is shown as a probability of 0 to 100 of waves heights (significant wave height) reaching or being greater than the chosen value.

  • The 90th percentile represents the wave height value that 90% of the ensemble members are either less than or equal to (i.e., 18 feet).

  • The 10th percentile is the wave height value that is represented by 10% of the contributing ensemble members.

  • The mean is defined as the 50th percentile, that is, the wave height value represented reflects half the distribution is above and half is below this value.

  • The maximum value is the highest value produced by any of the 21 ensemble members. It reflects the most severe conditions predicted by the ensemble prediction system.

The data are produced from the Global Ensemble Forecast System (GEFS) which is run every 6 hours and are created with 20 ensemble members.

Additional information for interpreting this data

More information is available from NOAA's Environmental Modeling Center (EMC).