Weather and Forecasting: Recent submissions
Now showing items 2781-2800 of 3043
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An Unusually Strong Gravity Wave over Western Washington
(American Meteorological Society, 1992)A mesoscale wave disturbance, observed over western Washington State, is studied through local observations and recognized by comparisons with theory as a large-amplitude gravity wave. It is shown that this gravity wave ... -
Automatic Tornado Prediction with an Improved Mesocyclone-Detection Algorithm
(American Meteorological Society, 1992)A new and improved algorithm for automatic mesocyclone detection is presented and tested on 23 mesocyclonic storms. A small false-alarm rate (4%) and high probability of detection (83%) are achieved for mesocyclone ... -
The Development of a Prototype Coupled Analysis and Nowcasting Knowledge-based System for Complex-Terrain Interaction Studies
(American Meteorological Society, 1992)An experimental weather classification, analysis, and nowcasting system, based upon a combination of artificial intelligence techniques and conventional numerical modeling, and designed for use as a real-time range/field ... -
Joint Typhoon Warning Center and the Challenges of Multibasin Tropical Cyclone Forecasting
(American Meteorological Society, 1992)The Joint Typhoon Warning Center (JTWC), a specialized component of the Naval Oceanography Command Center, Guam, is the busiest tropical cyclone warning center in the world. Its area of responsibility encompasses four broad ... -
The Fleet Numerical Oceanography Center Suite of Oceanographic Models and Products
(American Meteorological Society, 1992)Fleet Numerical Oceanography Center (FLENUMOCEANCEN) is the navy's real-time prediction center for global-scale and open-ocean regional-scale oceanographic products, having filled this role for over 25 years. FLENUMOCEANCEN ... -
A Description of the Air Force Real-Time Nephanalysis Model
(American Meteorological Society, 1992)The Air Force Global Weather Central (AFGWC) Real-Time Nephanalysis (RTNEPH) is an automated cloud model that produces a 48-km gridded analysis of cloud amount, cloud type, and cloud height. Its primary input is imagery ... -
The Man–Machine Mix in Operational Product Quality Control and Verification at Fleet Numerical Oceanography Center
(American Meteorological Society, 1992)The Quality Control (QC) Division of the U.S. Navy's Fleet Numerical Oceanography Center (FNOC) is responsible for the quality control of meteorological and oceanographic analyses and forecasts issued to operational users, ... -
The Navy Operational Global and Regional Atmospheric Prediction Systems at the Fleet Numerical Oceanography Center
(American Meteorological Society, 1992)At the Fleet Numerical Oceanography Center, two computer models, the Navy Operational Global Atmospheric Prediction System, NOGAPS, and the Navy Operational Regional Atmospheric Prediction System, NORAPS, generate a ... -
The Design and Testing of the Navy Operational Global Atmospheric Prediction System
(American Meteorological Society, 1992)The Navy Operational Global Atmospheric Prediction System (NOGAPS) has proven itself to be competitive with any of the large forecast models run by the large operational forecast centers around the world. The navy depends ... -
Quality Control for the Navy Operational Atmospheric Database
(American Meteorological Society, 1992)A new, operational meteorological database has been developed to provide quality-controlled observations for the atmospheric analysis and prediction systems at Fleet Numerical Oceanography Center (FNOC). The quality control ... -
The Navy's Operational Atmospheric Analysis
(American Meteorological Society, 1992)In January of 1988, significant upgrades were made to the Navy Operational Global Atmospheric Prediction System (NOGAPS). Among these improvements was the implementation of a multivariate optimum interpolation analysis ... -
Design of the Navy's Multivariate Optimum Interpolation Analysis System
(American Meteorological Society, 1992)The aspects of the navy's multivariate optimum interpolation (MVOI) for atmospheric analysis are presented. Included is an overview of how the MVOI is used in the navy's data-assimilation system, and the basic design of ... -
An Overview of Fleet Numerical Oceanography Center Operations and Products
(American Meteorological Society, 1992)The environment is a critical factor to the safe, effective operations of the U.S. Navy. In support of our global peacekeeping mission, the fleet must have timely and accurate forecasts of environmental conditions from the ... -
Glossary of Military and Environmental-Support Acronyms
(American Meteorological Society, 1992)tract -
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Changes to NMC's Regional Analysis and Forecast System
(American Meteorological Society, 1992)The recent implementation of changes to the National Meteorological Center's (NMC's) Regional Analysis and Forecast System (RAFS) is described. The changes include an expansion of the innermost grids of the nested-grid ... -
Johannes Letzmann: A Pioneer in the Study of Tornadoes
(American Meteorological Society, 1992)During the inter-war years one of the most prominent tornado researchers was Johannes Letzmann of Estonia. His productivity was essentially curtailed by the outbreak of World War II; however, up to that time his prodigious ... -
An Objective Clear-Air Turbulence Forecasting Technique: Verification and Operational Use
(American Meteorological Society, 1992)An objective technique for forecasting clear-air turbulence (CAT) is described. An index is calculated based on the product of horizontal deformation and vertical wind shear derived from numerical model forecast winds ... -
An Observation of the Relationship between Supercell Structure and Lightning Ground-Strike Polarity
(American Meteorological Society, 1992)Cloud-to-ground lightning data are presented from tornadic thunderstorms in Oklahoma, Kansas, and Nebraska on 13 March 1990. The tornadic storms from northern Oklahoma northward into Kansas and Nebraska produced an unusually ... -
Mesoscale Eddy Development over South Auckland—A Case Study
(American Meteorological Society, 1992)Evidence is presented confirming the existence of a late-afternoon mesoscale eddy primarily caused by local diabatic heating. Simulations with the Colorado State University (CSU) mesoscale model show that the eddy forms ...