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World Meteorological Organization / Organisation Mondiale Meteorologique

by Blas Delgado Ortiz, 24 June 2000

The World Meteorological Organization promotes scientific research on the Earth's atmosphere and on climate change and facilitates the global exchange of meteorological data.
Blas Delgado Ortiz, 24 June 2000

Weather warning flags

See also:

Weather warning flags

All signals are found in Ch. 5 of ‘WMO Publication No. 9, Weather Reporting, Volume D, Information for Shipping’. Most are specific to individual countries, but two are shown in Annex II ‘National Systems of Visual Storm Warning Signals (Day Signals) as offered by WMO on line (sometimes): http://www.wmo.int/pages/prog/www/ois/Operational_Information/VolumeD/VolumeD.pdf

images located by Jan Mertens, 4 May 2008

The first signal is really a set of two flags, a yellow one with thin red ascending diagonal stripes (is the number important? I count seven) above a white one bearing a thin red saltire. The second signal is a red pennant with two vertical blue stripes. I could not find these in the country list and suppose they were abolished in the past but not removed from the table.
Jan Mertens, 4 May 2008

These seem to be ICS letter flags spelling "yv" (Yankee and Victor). Pairs of ICS flags have usually separate meanings; any idea about this?
António Martins-Tuválkin, 5 May 2008