Which number on the Beaufort scale denotes a strong gale?
"instance, 0 2 4 5 7 9 11 denotes any major scale such as C–D–E–F–G–A–B, in which the first degree is, obviously, 0 semitones from the tonic (and therefore coincides with it), the second is 2 semitones from the tonic, the third is 4 semitones from the tonic, and so on. Again, this implies that the notes are drawn from a chromatic scale tuned with 12-tone equal temperament. For some fretted string instruments, such as the guitar and the bass guitar, scales can be notated in tabulature, an approach which indicates the fret number and string upon which each scale"
"winds"" warning will be issued when squalls are expected of between 25 and 33 knots or registering force 6 to 8 on the Beaufort scale. A gale warning announces the likelihood of gale-force winds, i.e. those at speeds as of 34 knots or more or force 8 on the Beaufort scale. In order to issue these warnings, orange-coloured flashing lights are installed around the lake, which flash at a frequency of 40 times per minute for high winds or 90 times per minute for gales. It can happen that, due to the differently regulated responsibilities and assessments, a gale warning"
"scale, decoded as 32–38 mph, or a ""moderate Gale"". Beaufort, like other patrons of exploration, has had his name given to many geographical places. Among these: Beaufort created the Beaufort cipher. It is a substitution cipher similar to the Vigenère cipher. Francis Beaufort Rear Admiral Sir Francis Beaufort, KCB, FRS, FRGS, FRAS, MRIA (; 27 May 1774 – 17 December 1857) was an Irish hydrographer and officer in the Royal Navy. Beaufort was the creator of the Beaufort Scale for indicating wind force. Francis Beaufort was descended from French Protestant Huguenots, who fled the French Wars of Religion in the"
"Beaufort scale The Beaufort scale is an empirical measure that relates wind speed to observed conditions at sea or on land. Its full name is the Beaufort wind force scale. The scale was devised in 1805 by the Irish hydrographer Francis Beaufort (later Rear Admiral Sir Francis Beaufort), a Royal Navy officer, while serving on HMS ""Woolwich"". The scale that carries Beaufort's name had a long and complex evolution from the previous work of others (including Daniel Defoe the century before) to when Beaufort was Hydrographer of the Navy in the 1830s when it was adopted officially and first used"
"Gale A gale is a strong wind, typically used as a descriptor in nautical contexts. The U.S. National Weather Service defines a gale as 34–47 knots (, or ) of sustained surface winds. Forecasters typically issue gale warnings when winds of this strength are expected. In the United States, a gale warning is specifically a maritime warning; the land-based equivalent in National Weather Service warning products is a wind advisory. Other sources use minima as low as , and maxima as high as . Through 1986, the National Hurricane Center used the term gale to refer to winds of tropical"
"is uncertain. Gale A gale is a strong wind, typically used as a descriptor in nautical contexts. The U.S. National Weather Service defines a gale as 34–47 knots (, or ) of sustained surface winds. Forecasters typically issue gale warnings when winds of this strength are expected. In the United States, a gale warning is specifically a maritime warning; the land-based equivalent in National Weather Service warning products is a wind advisory. Other sources use minima as low as , and maxima as high as . Through 1986, the National Hurricane Center used the term gale to refer to winds"
"defined as being at least , which is 8 on the modern Beaufort scale. Gales are recorded approximately 24 days per year in the Isles of Scilly and coastal Cornwall. Further north-east and further inland, the number of days decreases. Plymouth, coastal Devon, receives 16 days; Yeovilton, Somerset, receives seven; and Long Ashton, north-west Somerset, receives four. Wind speeds can vary on local topography: wooded or urban areas sheltered by hills receive fewer days of gales and lower wind speeds. On 15 December 1979, there were gusts of at Lizard Point, Cornwall at St Mary's, Isles of Scilly and at"
"winds in hurricanes would be 23 in the scale. Today, hurricane-force winds are sometimes described as Beaufort scale 12 through 16, very roughly related to the respective category speeds of the Saffir–Simpson hurricane scale, by which actual hurricanes are measured, where Category 1 is equivalent to Beaufort 12. However, the extended Beaufort numbers above 13 do not match the Saffir–Simpson scale. Category 1 tornadoes on the Fujita and TORRO scales also begin roughly at the end of level 12 of the Beaufort scale, but are independent scales – although the TORRO scale wind values are based on the 3/2 power"
"Francis Beaufort Rear Admiral Sir Francis Beaufort, KCB, FRS, FRGS, FRAS, MRIA (; 27 May 1774 – 17 December 1857) was an Irish hydrographer and officer in the Royal Navy. Beaufort was the creator of the Beaufort Scale for indicating wind force. Francis Beaufort was descended from French Protestant Huguenots, who fled the French Wars of Religion in the sixteenth century. His parents moved to Ireland from London. His father, Daniel Augustus Beaufort, was a Protestant clergyman from Navan, County Meath, Ireland, and a member of the learned Royal Irish Academy. His mother Mary was the daughter and co-heiress of"
"Gale warning Weather services issue a gale warning for maritime locations currently or imminently experiencing winds of Gale Force on the Beaufort scale. Gale warnings (and gale watches) allow mariners to take precautionary actions to ensure their safety at sea or to seek safe anchorage and ride out the storm on land. Though usually associated with deep low-pressure areas, winds strong enough to catalyze a gale warning can occur in other conditions too, including from anticyclones, or high-pressure systems, in the continental interior. In the United States, the National Weather Service issues gale warnings for marine areas (oceans, sounds, estuaries,"
"responsible for this and for the addition of the land-based descriptors. The measure was slightly altered some decades later to improve its utility for meteorologists. Today, many countries have abandoned the scale and use the metric system based units, m/s or km/h, instead, but the severe weather warnings given to the public are still approximately the same as when using the Beaufort scale. The Beaufort scale was extended in 1946, when forces 13 to 17 were added. However, forces 13 to 17 were intended to apply only to special cases, such as tropical cyclones. Nowadays, the extended scale is only"
"at this altitude, updraughts with speeds that can exceed . Such an updraught speed corresponds to the wind speed of a small hurricane. The speed can even exceed . The maximum number in the Beaufort scale is 12 (""hurricane force"" wind) and is assigned to wind speeds of 64 knots or greater. If the Beaufort scale were extended, these updraughts would have a Beaufort number of 14 ""in the vertical direction"". The turbulence is then ""extreme"" at this altitude. Moreover, the diameters of the updraught columns vary between 2 km (air mass thunderstorm) and 10 km (supercell thunderstorm). The height"
"F1 corresponds to the twelfth level of the Beaufort scale, and F12 corresponds to Mach number 1.0. F0 was placed at a position specifying no damage (approximately the eighth level of the Beaufort scale), in analogy to how the Beaufort's zeroth level specifies little to no wind. From these wind speed numbers, qualitative descriptions of damage were made for each category of the Fujita scale, and then these descriptions were used to classify tornadoes. The diagram on the right illustrates the relationship between the Beaufort, Fujita, and Mach number scales. At the time Fujita derived the scale, little information was"
"warning. These designations were standardized nationally in 2008, whereas ""light wind"" can refer to 0 to 12 or 0 to 15 knots and ""moderate wind"" 12 to 19 or 16 to 19 knots, depending on regional custom, definition or practice. Prior to 2008, a ""strong wind warning"" would have been referred to as a ""small craft warning"" by Environment Canada, similar to US terminology. (Canada and the USA have the Great Lakes in common.) Beaufort scale The Beaufort scale is an empirical measure that relates wind speed to observed conditions at sea or on land. Its full name is the"
"water on the fire. Despite the crew's exertions, the ""Queen Charlotte"" eventually blew up with the loss of 673 people out of its complement of 840 officers, men and boys, including the Captain and her first Lieutenant. Dundas however survived. By 14 June 1800 Dundas was captain of the sloop ""Cameleon"". She and ""Salamine"" shared in the capture on that day of the Genoese brig ""Anima Purgatoria"", which was sailing from Bastia to Salcolight. Next, Dundas was appointed to the command of the sixth-rate HMS ""Calpe"". On the night of 27 October 1800, Francis Beaufort, inventor of the Beaufort Wind-Scale,"
"Change in wind direction is indicated by ""veering"" (clockwise change) or ""backing"" (anti-clockwise change). Winds at or above force 8 are also described by name for emphasis, i.e., Gale 8, Severe Gale 9, Storm 10, Violent Storm 11 and Hurricane force 12. The word ""force"" is only officially used when announcing force 12 winds. Visibility is given in the format ""Good"", meaning that the visibility is greater than ; ""Moderate"", where visibility is between nautical miles; ""Poor"", where visibility is between 1,000 metres and two nautical miles and ""Fog"", where visibility is less than . When severe winter cold combines"
"TORRO scale The TORRO tornado intensity scale (or T-Scale) is a scale measuring tornado intensity between T0 and T11. It was proposed by Terence Meaden of the Tornado and Storm Research Organisation (TORRO), a meteorological organisation in the United Kingdom, as an extension of the Beaufort scale. The scale was tested from 1972 to 1975 and was made public at a meeting of the Royal Meteorological Society in 1975. The scale sets T0 as the equivalent of 8 on the Beaufort scale and is related to the Beaufort scale (B) by the formula: and conversely: The Beaufort scale was first"
"is used in the Shipping Forecasts broadcast on BBC Radio 4 in the United Kingdom, and in the Sea Area Forecast from Met Éireann, the Irish Meteorological Service. 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. Other warnings are issued by Met Éireann for Irish coastal waters, which are regarded as extending 30 miles out from the coastline, and the Irish Sea or part thereof: ""Gale Warnings"" are issued if winds of Beaufort force 8 are expected; ""Strong Gale Warnings"" are"
"to the Saffir-Simpson Hurricane Scale. However, the JTWC classified typhoons with winds of at 150 mph or higher ""Supertyphoons"". The Bureau of Meteorology in Australia uses a 1–5 scale called tropical cyclone severity categories. Unlike the Saffir–Simpson Hurricane Scale, it categorizes tropical cyclones based on wind gusts. Before the 1–5 scale was created in 1969 by the National Hurricane Center and later by the Bureau of Meteorology in Australia. Many tropical cyclones were simply ranked by the Beaufort Wind Scale which was created in the early 1800s by Francis Beaufort. The purpose of the scale was to standardize wind reports"
"used in Taiwan and mainland China, which are often affected by typhoons. Internationally, WMO Manual on Marine Meteorological Services (2012 edition) defined the Beaufort Scale only up to force 12 and there was no recommendation on the use of the extended scale. Wind speed on the 1946 Beaufort scale is based on the empirical relationship: Where ""v"" is the equivalent wind speed at 10 metres above the sea surface and ""B"" is Beaufort scale number. For example, ""B"" = 9.5 is related to 24.5 m/s which is equal to the lower limit of ""10 Beaufort"". Using this formula the highest"
"wind. Some sources regard ""spoondrift"" as a direct alternative to ""spindrift"" in all its uses. In Greek and Roman mythology, Leucothea is considered the goddess of spindrift. Spindrift Spindrift (more rarely spoondrift) usually refers to spray, particularly to the spray blown from cresting waves during a gale. This spray, which ""drifts"" in the direction of the gale, is one of the characteristics of a wind speed of 8 Beaufort and higher at sea. In Great Britain ""spindrift"" is the telltale sign used by mariners to define a Force 8 (Beaufort Scale) wind (not higher) when observed at sea. See this"
"areas in England and Wales receive fewer than 5 days of gale a year. Areas of high elevation tend to have higher wind speeds than low elevations, and Great Dun Fell in Cumbria (at ) averaged 114 days of gale a year during the period 1963 to 1976. The highest gust recorded at a low level in England was at Gwennap Head in Cornwall on 15 December 1979, and a 115 mph gust was also recorded at Shoreham-By-Sea on 16 October 1987. A disputed 122 mph gust was recorded on 16 October 1987 at Gorleston in Norfolk during the Great"
"headlands of Ireland (e.g. Fair Head, Malin Head, Mizen Head, Carnsore Point) defining stretches of coast. Meteorological Service of Canada issues a similar gale warning for lakes, oceans, and other marine areas within jurisdiction of Canada. The following is an example of a Gale Warning issued by the National Weather Service office in North Webster, Indiana. Gale warning Weather services issue a gale warning for maritime locations currently or imminently experiencing winds of Gale Force on the Beaufort scale. Gale warnings (and gale watches) allow mariners to take precautionary actions to ensure their safety at sea or to seek safe"
"Great Gale of 1880 The Great Gale of 1880 was an extremely intense extratropical cyclone (possibly deeper than 955 millibars (mb) or 28.20"") that impacted the Northwest United States on January 9, 1880. On January 19, 1880, a letter to ""The Daily Oregonian"" from an Astoria resident reads, Parts of the lower Columbia seem to have experienced a blizzard, as related from Westport: An article printed on January 12, 1880 noted, In the Fort Clatsop area along the Lewis and Clark River, it was reported Likely, all these locations were north of the storm’s center. A west and northwest wind"
"Spindrift Spindrift (more rarely spoondrift) usually refers to spray, particularly to the spray blown from cresting waves during a gale. This spray, which ""drifts"" in the direction of the gale, is one of the characteristics of a wind speed of 8 Beaufort and higher at sea. In Great Britain ""spindrift"" is the telltale sign used by mariners to define a Force 8 (Beaufort Scale) wind (not higher) when observed at sea. See this example of information provided by Lymington Harbour authority, Hampshire, England, UK, explaining the whole scale, the associated wind speeds, and its telltale signs. Text from the site"
"ice crystals at atmospheric levels. Larger hailstones are capable of producing damage to property, and particularly with very large hailstones, resulting in serious injury or death due to blunt-force trauma induced by the impact of the hailstones. Hailstone size is typically correspondent to the size of an object for comparative purposes. <nowiki>*</nowiki> <br> The Beaufort scale is an empirical measure that correlates wind speed to observed conditions at sea or on land. The Enhanced Fujita scale, an updated version of the original Fujita scale that was developed by Ted Fujita with Allen Pearson, assigns a numerical rating from EF0 to"
"during the voyage of HMS ""Beagle"" under Captain Robert FitzRoy, later to set up the first Meteorological Office (Met Office) in Britain giving regular weather forecasts. In the early 19th century, naval officers made regular weather observations, but there was no standard scale and so they could be very subjective – one man's ""stiff breeze"" might be another's ""soft breeze"". Beaufort succeeded in standardising the scale. The initial scale of thirteen classes (zero to twelve) did not reference wind speed numbers but related qualitative wind conditions to effects on the sails of a frigate, then the main ship of the"
"tomb may still be seen. His home in London, No. 51 Manchester Street, Westminster, is marked by an historic blue plaque noting his residency and achievements. During these early years of command, Beaufort developed the first versions of his Wind Force Scale and Weather Notation coding, which he was to use in his journals for the remainder of his life. From the circle representing a weather station, a staff (rather like the stem of a note in musical notation) extends, with one or more half or whole barbs. For example, a stave with 3½ barbs represents Beaufort seven on the"
"were influential men in British naval and governmental circles, and though ridiculed in the press at the time, their work gained scientific credence, was accepted by the Royal Navy, and formed the basis for all of today's weather forecasting knowledge. Beaufort developed the Wind Force Scale and Weather Notation coding, which he was to use in his journals for the remainder of his life. He also promoted the development of reliable tide tables around British shores, and with his friend William Whewell, expanded weather record-keeping at 200 British Coast guard stations. Robert FitzRoy was appointed in 1854 as chief of"
"a low accumulated cyclone energy (ACE) rating of 43. ACE is, broadly speaking, a measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. ACE is only calculated for full advisories on tropical systems at or exceeding 34 knots (39 mph, 63 km/h) or tropical storm strength. The ship ""Star of the South"" experienced heavy gales offshore the East Coast of the United States on June 30. HURDAT lists the first tropical cyclone of the season beginning at 0000"
"states: Force 8, defined as ""Gale"". Wind speed 39-46 mph, equal to 34-40 knots. Inland, twigs break off trees; progress generally impeded. At sea, moderately high waves of greater length; edges of crests begin to break into spindrift; foam is blown in well-marked streaks along the direction of the wind. Relatedly, ""spindrift"" can also be used to describe fine sand or snow that is blown off by the wind. ""Spindrift"" is a southern English word, ""Spoondrift"" a northern or Scottish word. The Scottish word ""spoondrift"" can be used to describe fine snow that is blown off the hills by the"
"scale. Winds strong enough to trigger a small craft advisory may be referred to as being advisory-force. Conversely, winds just above this intensity (39-57 miles per hour) are called gale-force, and have a separate associated warning. Occasionally an informal lesser advisory, known as ""small craft exercise caution"", is issued for wind speeds lighter than those that call for a small craft advisory. Criteria for this vary in different localities; sometimes a range of 19 to 24 miles per hour (17 to 21 knots) is observed, or in some places 17 to 23 miles per hour (15 to 19 knots) may"
"indicating a storm warning with northwesterly winds. By late afternoon, the storm signal flags were replaced with a vertical sequence of red, white, and red lanterns, indicating that a hurricane with winds over 74 mph (119 km/h) was coming. (The word ""hurricane"" here does not refer to a tropical cyclone, but to Force 12 winds on the Beaufort scale.) The winds on Lake Superior had already reached 50 mph (80 km/h), and an accompanying blizzard was moving toward Lake Huron. By Saturday, the storm's status had been upgraded to ""severe"". The storm was centered over eastern Lake Superior, covering the"