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A Small Craft Advisory may also be issued when sea or lake ice exists that could be hazardous to small boats. [1] The insignia that denotes a small craft advisory is one red, triangular flag (two such flags, one placed above the other, signify a gale warning). Inland, this advisory is known as a wind advisory.
In United States maritime warning flag systems, two red pennants indicate a gale warning; the use of one such flag denotes a small craft advisory. The National Weather Service issues a storm warning for higher winds of 48 knots (89 km/h; 55 mph) to 63 knots (117 km/h; 72 mph) at sea.
Thresholds necessitating the issuance of wind-based small craft advisories are determined by the accordant NWS Regional Headquarters. Brisk wind advisory NPW – Sea or lake ice is expected and may be hazardous to small marine craft. May be issued as a Small Craft Advisory with reference of being a brisk wind advisory.
A Hazardous Seas Warning is issued by the National Weather Service of the United States when wave heights and/or wave steepness values reach certain criteria. These criteria are defined by the local forecast office.
At the time, weather forecasters had issued a small craft advisory, warning boaters in Los Angeles County that there could be waves up to 10 feet high. When the men didn't return, they were ...
a hazardous seas watch has also been issued. this hazardous seas watch is in effect from friday afternoon through late saturday night. the small craft advisory for hazardous seas is now in effect from 4 am thursday to 4 pm pst friday. a small craft advisory for winds remains in effect from 4 am thursday to 4 am pst friday.
Small craft advisory; Snow emergency; Snow squall warning; Special marine warning; Special weather statement; List of Storm Prediction Center extremely critical days;
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