.jpg)
Ahurricane force wind warning is a warning issued by theNational Weather Service of theUnited States when sustained winds or frequent gusts of 64 knots (118 km/h, 74 mph) or greater are either being observed or are predicted to occur.[1] The winds must not be directly associated with a tropical cyclone, or ahurricane warning will be issued.[2] If winds are lighter than 64 knots, astorm warning orgale warning will be issued.[3] The hurricane force wind warning is only used to warn of the possibility of wind which reaches hurricane-level severity, but lacks direct connection with a hurricane system.[3] The hurricane force wind can either signal sustained winds of 64 knots, or gusts of 64 knots lasting for two or more hours.[4]
In US maritime warning flag systems, two red square flags with a black square taking up the middle ninth of each flag is used to indicate a hurricane force wind warning (the use of one such flag denotes astorm warning or atropical storm warning). The flags used to denote hurricane force winds are also used to warn of incoming hurricanes.[5]
 | This sectionpossibly containsoriginal research. Pleaseimprove it byverifying the claims made and addinginline citations. Statements consisting only of original research should be removed.(August 2017) (Learn how and when to remove this message) |
URGENT - MARINE WEATHER MESSAGENATIONAL WEATHER SERVICE PORTLAND OR249 AM PDT MON MAR 12 2012PZZ255-275-121800-/O.CON.KPQR.HF.W.0002.000000T0000Z-120313T0100Z/COASTAL WATERS FROM CASCADE HEAD TO FLORENCE OR OUT 10 NM-WATERS FROM CASCADE HEAD TO FLORENCE OR FROM 10 TO 60 NM-249 AM PDT MON MAR 12 2012...HURRICANE FORCE WIND WARNING REMAINS IN EFFECT UNTIL 6 PM PDTTHIS EVENING...A HURRICANE FORCE WIND WARNING REMAINS IN EFFECT UNTIL 6 PM PDTTHIS EVENING.* WINDS...SOUTH WIND 40 TO 50 KT WITH GUSTS TO 70 KT EXPECTED TO PEAK MONDAY MORNING OVER THE OUTER WATERS...WITH LOCAL GUSTS TO 75 KT POSSIBLE OVER THE INNER WATERS MONDAY LATE MORNING AND EARLY AFTERNOON.* SEAS....COMBINED SEAS WILL REACH 28 TO 30 FEET EARLY MONDAY MORNING...POSSIBLY HIGHER...THEN EASE TO AROUND 20 FEET BY EARLY MONDAY EVENING. SEAS WILL BE QUITE CHOPPY WITH A HIGH SOUTH TO SOUTHWEST WIND WAVE COMPONENT...AND A WEST LONGER PERIOD SWELL COMPONENT.PRECAUTIONARY/PREPAREDNESS ACTIONS...A HURRICANE FORCE WIND WARNING MEANS WINDS OF 64 KNOTS OR GREATERARE IMMINENT OR OCCURRING. ALL VESSELS SHOULD REMAIN IN PORT...ORTAKE SHELTER AS SOON AS POSSIBLE...UNTIL WINDS AND WAVES SUBSIDE.
 | This article related to a specific weather event is astub. You can help Wikipedia byexpanding it. |