This would cause each storm to rotate cyclonically around a point in between them.
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Tornadoes normally rotate cyclonically (when viewed from above, this is counterclockwise in the northern hemisphere and clockwise in the southern). While large-scale storms always rotate cyclonically due to the Coriolis effect, thunderstorms and tornadoes are so small that the direct influence of the Coriolis effect is unimportant, as indicated by their large Rossby numbers. Supercells and tornadoes rotate cyclonically in numerical simulations even when the Coriolis effect is neglected. Low-level mesocyclones and tornadoes owe their rotation to complex processes within the supercell and ambient environment.
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From there SACCF wraps the island anti- cyclonically, retroflects north of it, and flows across the Northeast Georgia Rise before looping cyclonically into the South Atlantic. The retroflection north of the island and across the rise shows a strong seasonal variability but SACCF remains constrained by these bathymetric obstacles. Weddell Sea Deep Water (WSDW) circulates cyclonically in the Weddell Gyre from where it escapes through gaps in the South Scotia Ridge, such as the South Sandwich Trench. It then flows across the Scotia Sea which it can only escape through the Georgia Passage.
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Warm eddies rotate anti-cyclonically, while cold eddies rotate cyclonically. Because eddies may have a vigorous circulation associated with them, they are of concern to naval and commercial operations at sea. Further, because eddies transport anomalously warm or cold water as they move, they have an important influence on heat transport in certain parts of the ocean.
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Along the continental margins of the Arctic Ocean basin, narrow boundary currents are hypothesized to house intense large-scale advection that is critical in the general circulation of Arctic waters. From the Bering Strait, Pacific Ocean waters flow counterclockwise (cyclonically) along the northern shores of Canada, passing through the Lincoln Sea. Atlantic Ocean waters cyclonically flow in from and return to the Eurasian basin along the Greenland Sea continental slope. The waters of these basins converge at the Lincoln Sea, creating unique vertical temperature and salinity profiles here.
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Cyclonic rotation or circulation is movement in the same direction as the Earth's rotation, as opposed to anticyclonic rotation. The Coriolis effect causes cyclonic rotation to be in a counterclockwise direction in the northern hemisphere, and clockwise in the southern hemisphere. A closed area of winds rotating cyclonically is known as a cyclone.
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This water is less dense than (DSOW) and lays above it as it flows cyclonically in the Irminger Basin. DSOW is the coldest, densest, and freshest water mass of NADW. DSOW formed behind the ridge flows over the Denmark Strait at a depth of 600m. The most significant water mass contributing to DSOW is Arctic Intermediate Water (AIW).
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The final storm of the season began its life east of Sri Lanka on November 27. It drifted northwestward, becoming a tropical storm on the 28th before cyclonically looping to the west. On the 30th the storm became a cyclone, and hit southeastern India on the 1st as an 85 mph cyclone. It rapidly weakened over India, and lost its low level circulation on the 2nd.
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Charley originated with a large swirl of clouds which parted off of the west coast of Africa on August 9. Lacking deep convection or a well defined center, the wave continued west-northwestward without developing. Ten days later, on August 19, satellite images indicated the disturbance was beginning to rotate cyclonically over the southeastern Gulf of Mexico. A reconnaissance aircraft flew into the system the next day.
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By the evening of November 27, its central pressure had increased to while located a couple hundred miles south of Iceland. The cyclone continued to loop cyclonically west of Iceland, absorbing a cyclone along the way as it passed southwest off the southern tip of Greenland, before a developing gale approaching Great Britain absorbed this cyclone late on December 1.Ocean Prediction Center. Unified Surface Analysis: 14 Day Loop.
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The Mindanao Current is an ocean current along the eastward side of the southern Philippines. It is a narrow, southward flowing current starting at 14°N with 13Sv increasing in strength to 33Sv at 5.5°N. The current splits before the coast of south-east Mindanao where one part flows cyclonically into the Celebes Sea later feeding the North Equatorial Counter Current (NECC) while another part feeds the NECC directly.
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Current research on the WSC focuses in on two areas: heat content and methane gas release. It has been well documented that the Atlantic Water core temperature associated with the WSC has increased by almost 1 °C in recent years. It has also been well documented that the Atlantic Water core temperature decreases as you move cyclonically around the Arctic. Thus, this means that heat is being lost to the surrounding water.
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As ISOW overflows the GSR, it turbulently entrains intermediate density waters such as Sub-Polar Mode water and Labrador Sea Water. This grouping of water-masses then moves geostrophically southward along the East flank of Reykjanes Ridge, through the Charlie Gibbs Fracture Zone and then northward to join DSOW. These waters are sometimes referred to as Nordic Seas Overflow Water (NSOW). NSOW flows cyclonically following the surface route of the SPG around the Labrador Sea and further entrains LSW.
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A third component of motion that occurs relatively infrequently involves the interaction of multiple tropical cyclones. When two cyclones approach one another, their centers will begin orbiting cyclonically about a point between the two systems. Depending on their separation distance and strength, the two vortices may simply orbit around one another or else may spiral into the center point and merge. When the two vortices are of unequal size, the larger vortex will tend to dominate the interaction, and the smaller vortex will orbit around it.
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The near-surface wind field of a tropical cyclone is characterized by air rotating rapidly around a center of circulation while also flowing radially inwards. At the outer edge of the storm, air may be nearly calm; however, due to the Earth's rotation, the air has non-zero absolute angular momentum. As air flows radially inward, it begins to rotate cyclonically (counter-clockwise in the Northern Hemisphere, and clockwise in the Southern Hemisphere) to conserve angular momentum. At an inner radius, air begins to ascend to the top of the troposphere.
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On October 1, the JMA started to monitor a tropical depression near Wake Island. By the next day, the system's circulation became expansive as the JMA upgraded the depression to a tropical storm, naming it Choi-wan. The JTWC classified the system as a tropical storm by October 2, due to improved banding features, despite a large windfield. Despite favorable conditions, Choi-wan maintained its intensity as a weak system due to a large and very broad circulation; mesovortices were seen on satellite imagery rotating cyclonically in its center.
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Diagram of the Fujiwhara effect, showing how 2 tropical cyclones interact with each other. When cyclones are in proximity of one another, their centers will circle each other cyclonically (counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere) about a point between the two systems due to their cyclonic wind circulations. The two vortices will be attracted to each other, and eventually spiral into the center point and merge. It has not been agreed upon whether this is due to the divergent portion of the wind or vorticity advection.
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The current is quite narrow and strong, having a width of roughly 100 kilometers and a maximum speed of 35 cm/s. At about 80° North latitude the WSC splits into two different sections, the Svalbard branch and the Yermak Branch. The Svalbard Branch continues to follow the continental shelf northeastward, and eventually sinks to an intermediate depth and is cyclonically recirculated throughout the Arctic, eventually being pushed out through the East Greenland Current. The Yermak Branch moves northwesterly till about 81°N, and then it moves directly westward and eventually equatorward in the Return Atlantic Current.
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Satellite imagery showed that a well defined eye and numerous cyclonically curved convective bands remained over the Lesser Antilles. That evening, another reconnaissance aircraft reached the hurricane and discovered that it had strengthened into a Category 4 hurricane, and by 0600 UTC on August 18, Dean reached Category 5 intensity for the first time with 165 mph (270 km/h) winds. The storm's wind radii increased in all quadrants as the storm grew in both intensity and size. At 0800 UTC August 18, Hurricane Dean passed directly over NOAA sea buoy 42059 which reported a significant wave height (average size of the largest 33% of waves) of 33 ft (10 m).
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Most strong tornadoes form in the inflow and updraft area bordering the updraft-downdraft interface (which is also near the mesoscale "triple point") zone of supercell thunderstorms. The thunderstorm itself is rotating, with a rotating updraft known as a mesocyclone, and then a smaller area of rotation at lower altitude the tornadocyclone (or low-level mesocyclone) which produces or enables the smaller rotation that is a tornado. All of these may be quasi-vertically aligned continuing from the ground to the mid-upper levels of the storm. All of these cyclones and scaling all the way up to large extratropical (low- pressure systems) and tropical cyclones rotate cyclonically.
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Night of the Twisters is a young adult realistic fiction novel by Ivy Ruckman that was released in 1984 by publisher Harper & Row (now HarperCollins). The book is a semi-fictionalized account of the 1980 Grand Island tornado outbreak, which produced seven tornadoes (including three that rotated anti- cyclonically) in and around Grand Island, Nebraska, on the evening of June 3, 1980, killing five people and injuring 134. It is told from the point of view of its 12-year-old protagonist Danny Hatch, who – after his home and neighborhood are destroyed by one of the tornadoes – begins a search for his parents as the event takes place. The book won six literary awards including the Golden Sower Award, the Iowa Children's Choice Award and the Sequoyah Children's Book Award and as well as an Outstanding Science Trade Books for Children recommendation by the National Science Teachers Association and Children's Book Council.
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Although the storm was now considered a tropical cyclone, wind shear that had earlier inhibited development remained present, as well as the outflow of Tropical Storm Beatriz in the Eastern Pacific, disrupting the core of the infant tropical depression; aircraft reconnaissance often could not identify a defined center of circulation. While the initial system in the Bay of Campeche continued to struggle in its organization, a new cluster of thunderstorms concentrated in a band developed to the depression's northwest late on June 18\. Over the next 24 hours, this new area of precipitation began to wrap cyclonically around a new and dominant circulation center; the NHC assumed the tropical depression to have relocated to the northwest and classified the system as Tropical Storm Arlene at 1200 UTC on June 19. As Arlene would not strengthen after classification, peak intensity was attained concurrent with its upgrade to tropical storm strength with maximum sustained winds of 40 mph (65 km/h) and a minimum barometric pressure of 1000 mbar (hPa; 29.71 inHg).
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As it tracked quickly westward, the convection organized and developed into rainbands – bands of showers and thunderstorms that spiral cyclonically toward the storm center – and late on September 1 meteorologists began tracking the system using the Dvorak technique. Low amounts of wind shear and favorable outflow allowed vigorous deep convection to develop and persist near the center, and by 1800 UTC on September 2 the system developed into Tropical Depression Nine about 450 miles (730 km) southwest of Praia, Cape Verde. Upon being classified as a tropical cyclone, the depression was embedded within a deep easterly steering current provided by a ridge to its north. Expected to track across sea surface temperatures greater than 82 °F (28 °C), the cyclone was forecast to gradually strengthen and within four days attain hurricane status; the Geophysical Fluid Dynamics Laboratory predicted the depression to reach Category 4 status on the Saffir–Simpson Hurricane Scale within three days. Increased northeasterly wind shear shifted the center to the northeastern edge of the deep convection, and despite the shear and its relatively low latitude of 9.7° N, the depression strengthened to attain tropical storm status early on September 3; upon reaching the intensity, the National Hurricane Center classified the system as Tropical Storm Ivan.
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