Vessel IcingPrediction

Overland (1990) developed a method that predicts icing for vessels 20 to 75 meters in length that are steaming into the wind. Icing rates can be classified as follows:

                                                      Icing Class
Icing Rates		 None Light Moderate Heavy Extreme
(cm/hr) 0 <0.7 0.7 - 2.0 2.0 >4.0
(in/hr) 0 <0.3 0.3 - 0.8 0.8 -1.6 >1.6
Overland (1990)
Nomogram of Vessel Icing for Water Temperature of 3°C

This nomogram was developed from the Overland icing algorithm. It shows results for a water temperature of 3°C, typical of the Bering Sea. In this case, a windspeed of 20 knots at a temperature of -10°C results in moderate icing.

Icing nomograms are available at: http://www.weather.nps.navy.mil/~psguest/polarmet/vessel/predict.html#nomogram

GFS Vessel Icing Forecast for the North Pacific, 144-hr Forecast valid 21 UTC 24 Jan 2011

Overland's icing prediction method also provides the basis of forecast products produced by the National Weather Service. They use weather parameters forecast by the GFS to create icing predictions like that shown here.

NOAA Vessel Icing Prediction Website: http://polar.ncep.noaa.gov/marine.meteorology/vessel.icing/.