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GWES Probabilistic Wave Height Guidance

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GWES 000 Hour Wave Height  max image GWES 006 Hour Wave Height  max image
000 Hour Wave Height max

006 Hour Wave Height max

GWES 012 Hour Wave Height  max image GWES 018 Hour Wave Height  max image
012 Hour Wave Height max

018 Hour Wave Height max

GWES 024 Hour Wave Height  max image GWES 030 Hour Wave Height  max image
024 Hour Wave Height max

030 Hour Wave Height max

GWES 036 Hour Wave Height  max image GWES 042 Hour Wave Height  max image
036 Hour Wave Height max

042 Hour Wave Height max

GWES 048 Hour Wave Height  max image GWES 054 Hour Wave Height  max image
048 Hour Wave Height max

054 Hour Wave Height max

GWES 060 Hour Wave Height  max image GWES 066 Hour Wave Height  max image
060 Hour Wave Height max

066 Hour Wave Height max

GWES 072 Hour Wave Height  max image GWES 078 Hour Wave Height  max image
072 Hour Wave Height max

078 Hour Wave Height max

GWES 084 Hour Wave Height  max image GWES 090 Hour Wave Height  max image
084 Hour Wave Height max

090 Hour Wave Height max

GWES 096 Hour Wave Height  max image GWES 102 Hour Wave Height  max image
096 Hour Wave Height max

102 Hour Wave Height max

GWES 108 Hour Wave Height  max image GWES 114 Hour Wave Height  max image
108 Hour Wave Height max

114 Hour Wave Height max

GWES 120 Hour Wave Height  max image GWES 126 Hour Wave Height  max image
120 Hour Wave Height max

126 Hour Wave Height max

GWES 132 Hour Wave Height  max image GWES 138 Hour Wave Height  max image
132 Hour Wave Height max

138 Hour Wave Height max

GWES 144 Hour Wave Height  max image GWES 150 Hour Wave Height  max image
144 Hour Wave Height max

150 Hour Wave Height max

GWES 156 Hour Wave Height  max image GWES 162 Hour Wave Height  max image
156 Hour Wave Height max

162 Hour Wave Height max

GWES 168 Hour Wave Height  max image GWES 174 Hour Wave Height  max image
168 Hour Wave Height max

174 Hour Wave Height max

GWES 180 Hour Wave Height  max image GWES 186 Hour Wave Height  max image
180 Hour Wave Height max

186 Hour Wave Height max

GWES 192 Hour Wave Height  max image GWES 198 Hour Wave Height  max image
192 Hour Wave Height max

198 Hour Wave Height max

GWES 204 Hour Wave Height  max image GWES 210 Hour Wave Height  max image
204 Hour Wave Height max

210 Hour Wave Height max

GWES 216 Hour Wave Height  max image GWES 222 Hour Wave Height  max image
216 Hour Wave Height max

222 Hour Wave Height max

GWES 228 Hour Wave Height  max image GWES 234 Hour Wave Height  max image
228 Hour Wave Height max

234 Hour Wave Height max

GWES 240 Hour Wave Height  max image
240 Hour Wave Height max



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).