Results 131 to 140 of about 402 (177)
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Bulletin of the American Meteorological Society, 1955
Are the outer precipitation bands of hurricanes and typhoons important phenomena? In suggesting that the answer to this question is “yes” several features of these bands are described or postulated. Methods of estimating the severity of attendant weather conditions by radar observation are offered.
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Are the outer precipitation bands of hurricanes and typhoons important phenomena? In suggesting that the answer to this question is “yes” several features of these bands are described or postulated. Methods of estimating the severity of attendant weather conditions by radar observation are offered.
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A simplified squall-line model revisited
Quarterly Journal of the Royal Meteorological Society, 2000AbstractWe revisit the parametrized moisture model of Garner and Thorpe and show it does indeed support realistic multicellular behaviour when an adequate (and commonly available) amount of instability is present in the initial environment. We also consider the dramatic impact that the simplified model's storms have on their upstream environments, and ...
ROBERT G FOVELL, PEI-HUA TAN
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Quarterly Journal of the Royal Meteorological Society, 1977
AbstractA study of convection as portrayed by Oceanographer radar during phase III of GATE reveals four occasions on which an organized line of convection moved with a speed close to or greater than the wind speed at any level. They are shown to resemble closely the analytical model and numerical simulation of tropical line squalls developed by ...
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AbstractA study of convection as portrayed by Oceanographer radar during phase III of GATE reveals four occasions on which an organized line of convection moved with a speed close to or greater than the wind speed at any level. They are shown to resemble closely the analytical model and numerical simulation of tropical line squalls developed by ...
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THE MERIDIONAL GROWTH OF SQUALL LINES
Journal of Meteorology, 1954Abstract Squall lines that form ahead of an accelerating cold front are sometimes observed to grow in length. In this paper an attempt is made to explain this interesting property of squall lines, and to deduce a mathematical formula by which this growth may be forecasted.
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Extratropical Squall Lines and Rainbands
1986Squall lines and rainbands occur over both tropical and extratropical areas of the Earth in both oceanic and land areas. They affect society in major ways because of their wide geographical range and frequency of occurrence and because they typically contain high rainfall rates.
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Balanced Atmospheric Response to Squall Lines
Journal of the Atmospheric Sciences, 1989Abstract When a Squall line propagates through the atmosphere, it not only excite transient gravity–inertia wave motion but also produces more permanent modifications to the large-scale balanced flow. Here we calculate this balanced response using the is isentropic/geostrophic coordinate version of semigeostrophic theory.
Wayne H. Schubert +2 more
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Tropical Squall Lines of the Arizona Monsoon
Monthly Weather Review, 1989Three cases of squall lines composed of strong to severe thunderstorms that formed over Arizona, and Sonora (Mexico) on July, 16-17 and 17-18, 1984, and August 2-3, 1986, are examined. Data, which included satellite imagery, VISSR-derived fields, surface data, and records or cloud-to-ground lightning strikes, indicate that the initiation, growth, and ...
Walter P. Smith, Robert L. Gall
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A NUMERICAL EXPERIMENT OF SQUALL-LINE FORMATION
Journal of Meteorology, 1959Abstract The formation of a prefrontal squall line is studied, based on a numerical method of solving the modified equation of motion, continuity (mass and moisture content), and thermodynamics simultaneously. Due to the limited capacity of the electronic computer used (IBM 650), computations in this experiment are necessarily simplified, and this ...
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A PROPOSED MECHANISM OF SQUALL LINES: THE PRESSURE JUMP LINE
Journal of Meteorology, 1950Abstract The squall line of 16 May 1948 in the area of the Cloud Physics Project, U. S. Weather Bureau micro-meteorological network of weather recording stations near Wilmington, Ohio, is analyzed by means of one-minute synoptic maps, x–t diagrams and isochrone maps. The relative behavior of the pressure jump, wind shift, temperature fall, maximum wind
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Effective Buoyancy in Squall Lines
Journal of the Atmospheric SciencesAbstract Squall lines consist of a buoyancy discontinuity with positive buoyancy extending hundreds of kilometers behind their leading edge. Because of this structure, conceptual models for isolated deep convective updrafts, which have a comparatively limited horizontal extent, fail to explain squall-line thermodynamics.
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