Beaufort force

That is, when the winds reach Beaufort force 28, no regular communication can be expected from that site.

In 2011, the sea state in the Solent was Beaufort force 4 or 5.

Warning: Winds may reach Beaufort Force 8 or rainstorm may occur in 48 hours.

This storm surge barrier protects Rotterdam against north westerly Beaufort Force 10 to 12 storms.

Beaufort Force 0 - Wind less than 1 kt, Calm, Sea surface smooth and mirror-like.

Beaufort Force 1 - Wind 1-3 kt, Light Air, Scaly ripples, no foam crests.

Beaufort Force 2 - Wind 4-6 kt, Light Breeze, Small wavelets, crests glassy, no breaking waves.

Beaufort Force 4 - Winds 11-16 kt, Moderate Breeze, Small waves 1 -4 ft. becoming longer, numerous whitecaps.

Beaufort Force 5 - Winds 17-21 kt, Fresh Breeze, Moderate waves 4 -8 ft taking longer form, many whitecaps, some spray.

Beaufort Force 6 - Winds 22-27 kt, Strong Breeze, Larger waves 8 -13 ft, whitecaps common, more spray.

Beaufort Force 3 - Wind 7-10 kt, Gentle Breeze, Large wavelets, crests begin to break, scattered whitecaps.

Beaufort Force 7 - Winds 28-33 kt, Near Gale, Sea heaps up, waves 13 -20 ft, white foam streaks off breakers.

Beaufort Force 11 - Winds 56-63 kt, Violent Storm, Exceptionally high (30 -45 ft) waves, foam patches cover sea, visibility more reduced.

Beaufort Force 9 - Winds 41-47 kt, Strong Gale, High waves (20 ft), sea begins to roll, dense streaks of foam, spray may reduce visibility.

Beaufort Force 12 -Winds 64+ kt, Hurricane, Air filled with foam, waves over 45 ft, sea completely white with driving spray, visibility greatly reduced.

He introduced the idea of a resultant wind obtained by summing vectorially all winds exceeding 20 km/h (13 mile/h)(the lower limit of Beaufort Force 4).

Beaufort Force 10 - Winds 48-55 kt, Storm, Very high waves (20 -30 ft) with overhanging crests, sea white densely blown foam, heavy rolling, lowered visibility.

Met Éireann issues a "Small Craft Warning" if winds of Beaufort force 6 (mean wind speed exceeding 22 knots) are expected up to 10 nautical miles offshore.

Green alert: Winds may reach Beaufort Force 6 in 24 hours or winds of Beaufort Force 6 7 are already blowing.

Beaufort Force 8 - Winds 34-40 kt Gale, Moderately high (13 -20 ft) waves of greater length, edges of crests begin to break into spindrift, foam blown in streaks.

SMBs are inflated on the surface before diving to mark the diver's position during drift dives, night dives, mist or disturbed sea conditions such as Beaufort force 2 or greater.

Over the next 11 months the Beaufort force, now usually accompanied by Beaufighters, was instrumental in crippling the convoy supply lines which were vital to Rommel's Afrika Korps.

Both metric and imperial units of measure are used in the definition of visibility, gale warnings use the Beaufort scale with names attached to Beaufort forces 8 to 12 while the height of waves is defined using metric units.

It is now too late to hope that major damage can be avoided--if you take the distance at which the winds fall to Beaufort force 12, the standard definition of a hurricane, then Hurricane Clem is just under 3,000 kill in diameter--that is, it is about four times as big in area as Alaska.