Weather and Forecasting: Recent submissions
Now showing items 2541-2560 of 3043
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Heavy Rain Events over the South-Facing Slopes of Hawaii: Attendant Conditions
(American Meteorological Society, 1997)Heavy rain events (>100 mm day?1) over the southeast flank of Mauna Loa volcano on the island of Hawaii are examined using surface, rawinsonde, rain gauge, and satellite data. The events occur in the presence of four types ... -
The Usefulness of MSU3 Analyses as a Forecasting Aid: A Statistical Study
(American Meteorological Society, 1997)A statistical analysis is performed on a 6-month global dataset consisting of satellite-derived channel 3 Microwave Sounding Unit (MSU3) brightness temperature and various conventionally derived fields to quantify the ... -
The Impact of Dropwindsonde Data on GFDL Hurricane Model Forecasts Using Global Analyses
(American Meteorological Society, 1997)The National Centers for Environmental Prediction (NCEP) and the Hurricane Research Division (HRD) of NOAA have collaborated to postprocess Omega dropwindsonde (ODW) data into the NCEP operational global analysis system ... -
The Environments of Significant Convective Events in the Western Mediterranean
(American Meteorological Society, 1997)The environmental characteristics associated with 313 significant convective events in the western Mediterranean are investigated using radiosonde ascents made in Mallorca (Spain). The events are separated into five groups, ... -
Investigation of Upper-Air Conditions Occurring with Warm Season Severe Wind Events in Utah
(American Meteorological Society, 1997)Analyses of proximity soundings and upper-air fields for 37?51 Utah severe wind cases (WIND), reported in the months of May?September and occurring within 3 h after upper-air observation time, are presented. In addition, ... -
Operational Forecasting and Detection of Mesoscale Gravity Waves
(American Meteorological Society, 1997)Mesoscale gravity waves display periods of 1?4 h, have wavelengths of 50?500 km, and can have important effects upon the sensible weather. Real-time prediction, detection, and nowcasting of these mesoscale phenomena is ... -
A Case Study of Lid Evolution Using Analyses of Observational Data and a Numerical Model Simulation
(American Meteorological Society, 1997)A case of lid formation and evolution over the southern Great Plains during early spring is analyzed using conventional data analysis and a 120-h simulation from the Pennsylvania State University/National Center for ... -
The Influence of Terrain-Induced Circulations on Wintertime Temperature and Snow Level in the Washington Cascades
(American Meteorological Society, 1997)This paper describes the mesoscale distribution of temperature and snow level in the Washington Cascades. During the winter months, when the Cascades separate relatively cold continental air to the east from warmer marine ... -
A Climatology of Significant Winter-Type Weather Events in the Contiguous United States, 1982–94
(American Meteorological Society, 1997)A dataset of all significant winter-type weather events reported in Storm Data within the contiguous United States from 1982 through 1994 has been compiled. Statistical analysis of this dataset is used to determine ... -
Using Satellite Data to Reduce Spatial Extent of Diagnosed Icing
(American Meteorological Society, 1997)Overprediction of the spatial extent of aircraft icing is a major problem in forecaster products based on numerical model output. Dependence on relative humidity fields, which are inherently broad and smooth, is the cause ... -
Low-Level Cloud Motion Winds from Meteosat High-Resolution Visible Imagery
(American Meteorological Society, 1997)Low-level wind fields over the Atlantic have been derived from clouds in Meteosat high-resolution visible images experimentally with one production cycle per day over a period of more than 1 yr. The cloud motion winds from ... -
Uncertainties in WSR-88D Measurements and Their Impacts on Monitoring Life Cycles
(American Meteorological Society, 1997)Radar measurement uncertainties associated with storm top, cloud top, and other height measurements are well recognized; however, the authors feel the resulting impacts on the trends of storm features are not as well ... -
Use of Regression Techniques to Predict Hail Size and the Probability of Large Hail
(American Meteorological Society, 1997)Multiple regression and logistic regression equations were derived for the prediction of hail size based on data from 1992 through 1994. The multiple regression equation was formulated to predict hail diameter. The logistic ... -
A Synoptic Evaluation of the NCEP Ensemble
(American Meteorological Society, 1997)Ensemble forecasting has been operational at NCEP (formerly the National Meteorological Center) since December 1992. In March 1994, more ensemble forecast members were added. In the new configuration, 17 forecasts with the ... -
Ice Phase Parameterization in a Numerical Weather Prediction Model
(American Meteorological Society, 1997)This article presents the implementation of simple parameterization schemes for ice phase microphysics, with snow as a diagnostic variable. The microphysical schemes are used within a standard parameterization scheme for ... -
Comparison of Traditional and Newly Developed Thunderstorm Indices for Switzerland
(American Meteorological Society, 1997)The preconvective environment on thunderstorm days in Switzerland north of the Alps has been investigated during a 5-yr period (1985?89). Thermodynamic and kinematic parameters calculated from the radiosounding in Payerne ... -
Nowcasting Convective Activity for Space Shuttle Landings during Easterly Flow Regimes
(American Meteorological Society, 1997)Space shuttle landings at the shuttle landing facility at Kennedy Space Center are subject to strict weather-related launch commit criteria and flight rules. Complex launch commit criteria and end-of-mission flight rules ... -
Mesoanalysis of Summertime Convergence Zones in Central and Eastern North Carolina
(American Meteorological Society, 1997)It is demonstrated that it is possible to perform informative mesoanalysis of summertime convergence boundaries in the southeastern United States by combining capabilities of the new WSR-88D Doppler radar with Geostationary ... -
Application of Over-the-Horizon Radar Observations to Synoptic and Mesoanalysis over the Atlantic
(American Meteorological Society, 1997)Over-the-horizon (OTH) radar observations of surface wind direction offer a high-resolution (15 km) resource for synoptic and mesoscale wind field analysis. With horizontal resolution at the lower end of the mesoscale and ... -
An Automated, Observations-Based System for Short-Term Prediction of Ceiling and Visibility
(American Meteorological Society, 1997)Several methods of generating very short term (0?6 h) probabilistic forecasts of ceiling and visibility are investigated: 1) an observations-based (OBS-based) system in which potential predictors consist of weather ...