Weather and Forecasting: Recent submissions
Now showing items 2821-2840 of 3043
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The Objective Use of Observed and Forecast Thickness Values to Predict Precipitation Type in North Carolina
(American Meteorological Society, 1991)The Local Objective Guidance for Predicting Precipitation Type (LOG/PT) consists of regression equations and nomograms. LOG/PT was designed to address problems inherent in forecasting wintry precipitation across North ... -
Strong Tornadoes and Flash-Flood-Producing Rainstorms During the Warm Season in the Mid-Atlantic Region
(American Meteorological Society, 1991)Storm-related literature spanning 45 years (1942?1986) was examined to 1) establish a climatology of strong tornadoes and intense rainstorms for the Mid-Atlantic region, and 2) identify the key environmental features that ... -
Recent Changes Implemented into the Global Forecast System at NMC
(American Meteorological Society, 1991)A number of improvements were implemented on 6 March 1991 into the National Meteorological Center's global model, which is used in the global data assimilation system (GDAS), the aviation (AVN) forecast, and the medium-range ... -
An Interactive Analysis and Forecast System for Tropical Cyclone Motion
(American Meteorological Society, 1991)The design concept and operational trial of a fully interactive analysis and numerical forecast system for tropical-cyclone motion are described. The design concept emphasizes an interactive system in which forecasters can ... -
High Plains Severe Weather—Ten Years After
(American Meteorological Society, 1991)More than a decade ago, a study was published that identified a short list of precursor conditions for severe thunderstorms on the High Plains of the United States. The present study utilizes data from the summer months ... -
A Synoptic Comparison of SSM/I Winds with Output from an Operational Forecast System
(American Meteorological Society, 1991)Near-surface wind speed analyses from the Special Microwave/Imager (SSM/I) are compared with those from an operational numerical forecast system. Substantial agreement exists, especially over open ocean. Nevertheless, the ... -
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Comments on “On Summary Measures of Skill in Rare Event Forecasting Based on Contingency Tables”
(American Meteorological Society, 1991)No abstract available -
The Landfall of Hurricane Hugo in the Carolinas: Surface Wind Distribution
(American Meteorological Society, 1991)Hurricane Hugo struck Charleston, South Carolina, on 22 September 1989 as the most intense hurricane to affect the United States since Camille in 1969. The northeastern eyewall, which contained the maximum winds measured ... -
Objective Guidance for 0–24-Hour and 24–48-Hour Mesoscale Forecasts of Lake-Effect Snow Using CART
(American Meteorological Society, 1991)Lake-effect-snow-possible (LESP) days were identified for each of 29 climatological stations in the lee of Lake Huron and Georgian Bay for the November-to-April winters of 1984?1988, using 0?24-h and 24?48-h wind and ... -
Validation of a Composite Convective Index as Defined by a Real-Time Local Analysis System
(American Meteorological Society, 1991)Advances in remote sensing from earth- and spaceborne systems, expanded in situ observation networks, and increased low-cost computer capability will allow an unprecedented view of mesoscale weather systems from the local ... -
Jet Stream Winds: Comparisons of Analyses with Independent Aircraft Data over Southwest Asia
(American Meteorological Society, 1991)We have obtained cruise-level wind data from commercial aircraft, and compared this data with operational jet stream analyses over southwest Asia, an area of limited conventional data. We present results from an ensemble ... -
Climatological Characteristics and Objective Prediction of Thunderstorms over Alaska
(American Meteorological Society, 1991)Archived lightning data from the Bureau of Land Management automated network of direction-finding stations in Alaska were examined to determine the seasonal, diurnal, and spatial distributions of cloud-to-ground lightning, ... -
Probabilities, Odds, and Forecasts of Rare Events
(American Meteorological Society, 1991)Several issues related to the mode of expression of forecasts of rare events (RSEs) are addressed in this paper. These issues include the correspondence between forecasters' judgments and their forecasts, the problem of ... -
A Point of Clarification about Area and Energy on Common Thermodynamic Diagrams
(American Meteorological Society, 1991)No abstract available -
Surface Weather Analysis at the National Meteorological Center: Current Procedures and Future Plans
(American Meteorological Society, 1991)The preparation of surface weather analyses at the National Meteorological Center (NMC) is currently under review. The availability of advanced graphics workstations and consideration of revisions to conceptual models of ... -
Long-Range Prediction of Regional Sea Ice Anomalies in the Arctic
(American Meteorological Society, 1991)Gridded fields of sea ice concentration are used to evaluate weekly and monthly anomalies of sea ice coverage in 22 Arctic subregions. The primary period of study is 1972?1988, although statistical comparisons are made ... -
A Lower-Tropospheric Thermodynamic Climatology for March through September: Some Implications for Thunderstorm Forecasting
(American Meteorological Society, 1991)A thermodynamic climatology was constructed to investigate source regions of low-level moist airmasses and lower mid-tropospheric dry airmasses that contribute to the production of convective instability, and thunder-storms, ... -
The Basic Relationship between Tropical Cyclone Intensity and the Depth of the Environmental Steering Layer in the Australian Region
(American Meteorological Society, 1991)A simple barotropic model is employed to investigate relative impacts on tropical cyclone motion forecasts in the Australian region when wind analyses from different tropospheric levels or layers are used as the input to ... -
Monitoring Precipitable Water and Surface Wind over the Gulf of Mexico from Microwave and VAS Satellite Imagery
(American Meteorological Society, 1991)Spatial and temporal changes of atmospheric water vapor and surface wind speeds are investigated for a period following an intrusion of cold continental air over the Gulf of Mexico, during the Gulf of Mexico Experiment ...