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Department of Commerce NOAA National Weather Service NCEP

NCEP MMAB Global Superstructure Ice Accretion Guidance

Last modified October 26, 2006. Reviewed July 3, 2013

The NCEP superstructure ice accretion forecast system was developed by applying statistical algorithms developed by Overland and Pease at the Pacific Marine Environmental Research Laboratory in the mid- 1980s. The algorithm relates icing to wind speed, freezing point of sea water, air temperature, and sea surface temperature. The method is designed for trawlers in the 20 to 75 meter length range, underway at normal speeds in open seas and not heading downwind. There are three categories: light - 0.1 to 0.8 inches of ice accretion/ 3 hours (aqua on chart); moderate - 0.8 to 2.4 inches/3 hours (dark blue on chart), and heavy - greater than 2.4 inches/3 hours (red on chart). It is currently available on a 1 deg x 1 deg grid Globally, North Atlantic , North Atlantic, Baltic and North Seas, and Arctic Ocean over Europe, Pacific, and The Southern Hemisphere. The animations and still figures are in gif format; the animations are on the order of 1 Mb, while the stills are on the order of 15k each. Model output is available throughout the year.

To ftp data, go to the links listed below. The GRIB binary data file contains 57 records: one for each projection from 00 to 168 hours at 3-h intervals on a 1 deg x 1 deg global grid. gif image files are also available. Please send questions and comments to Robert.Grumbine@noaa.gov

See About the NCEP Global Vessel Icing Guidance to find out the differences between the new and old versions of this product.


GFS Vessel Icing Forecast Animations

Table 1. Animation selection table. Each animation has 57 frames with forecasts from 00- through 168-h at 3 hour intervals. The animation has a size of about 1 Mb.

Model Cycle (UTC)

Global Animations

Atlantic Animations

Pacific Animations

Scandinavian Animations

S. Hemisphere Animations

0000

select

select

select

select

select

0600

select

select

select

select

select

1200

select

select

select

select

select

1800

select

select

select

select

select


Individual Vessel Icing Forecasts for Global and Regional Areas

Table 2. Individual forecast selection table. Within each depiction column are the numbers 00, 06, 12, and 18; these are the model run times for the projection hour.

Projection Hour

Global Depiction

Atlantic Depiction

Pacific Depiction

Scandinavian Depiction

S. Hemisphere Depiction

00

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

03

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

06

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

09

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

12

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

15

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

21

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

24

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

30

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

36

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

42

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

48

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

54

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

60

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

66

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

72

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

84

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

96

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

108

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

120

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

132

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

144

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

156

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

168

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18

00 06 12 18


FTP sites for Ice Accretion Forecast Data



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Page last modified: Tuesday, 26-Nov-2013 16:50:33 UTC