Weather and Forecasting: Recent submissions
Now showing items 1381-1400 of 3043
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Comparison between Low-Flash and Non-Lightning-Producing Convective Areas within a Mature Mesoscale Convective System
(American Meteorological Society, 2011)wo small multicellular convective areas within a larger mesoscale convective system that occurred on 20 June 2004 were examined to assess vertical motion, radar reflectivity, and dual-polarimetric signatures between flash ... -
The NSSL Hydrometeor Classification Algorithm in Winter Surface Precipitation: Evaluation and Future Development
(American Meteorological Society, 2011)he National Severe Storms Laboratory (NSSL) has developed a hydrometeor classification algorithm (HCA) for use with the polarimetric upgrade of the current Weather Surveillance Radar-1988 Doppler (WSR-88D) network. The ... -
Assessment of Forecasts during Persistent Valley Cold Pools in the Bonneville Basin by the North American Mesoscale Model
(American Meteorological Society, 2011)orth American Mesoscale Model (NAM) forecasts of low-level temperature and dewpoint during persistent valley cold pools in the Bonneville Basin of Utah are assessed. Stations near the east sidewall have a daytime cold and ... -
Real-Time Adaptive Observation Guidance Using Singular Vectors for Typhoon Jangmi (200815) in T-PARC 2008
(American Meteorological Society, 2011)n this study, structures of real-time adaptive observation guidance provided by Yonsei University (YSU) in South Korea during The Observing System Research and Predictability Experiment (THORPEX)-Pacific Asian Regional ... -
Short-Range Numerical Weather Prediction Using Time-Lagged Ensembles
(American Meteorological Society, 2007)A time-lagged ensemble forecast system is developed using a set of hourly initialized Rapid Update Cycle model deterministic forecasts. Both the ensemble-mean and probabilistic forecasts from this time-lagged ensemble ... -
Automated Lightning Flash Detection in Nighttime Visible Satellite Data
(American Meteorological Society, 2011)he Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) nighttime visible channel was designed to detect earth?atmosphere features under conditions of low illumination (e.g., near the solar ... -
Impacts of Sea Surface Temperature Uncertainty on the Western North Pacific Subtropical High (WNPSH) and Rainfall
(American Meteorological Society, 2011)his paper examines the sensitivity of short-term forecasts of the western North Pacific subtropical high (WNPSH) and rainfall to sea surface temperature (SST) uncertainty using the Coupled Ocean?Atmosphere Mesoscale ... -
A 5-yr Climatology of Tornado False Alarms
(American Meteorological Society, 2011)uring 2008 approximately 75% of tornado warnings issued by the National Weather Service (NWS) were false alarms. This study investigates some of the climatological trends in the issuance of false alarms and highlights ... -
A Proposed Model-Based Methodology for Feature-Specific Prediction for High-Impact Weather
(American Meteorological Society, 2011)feature-specific forecasting method for high-impact weather events that takes advantage of high-resolution numerical weather prediction models and spatial forecast verification methodology is proposed. An application of ... -
Comments on “Estimating Maximum Surface Winds from Hurricane Reconnaissance Measurements”
(American Meteorological Society, 2011) -
Assessing the Impacts of Different WRF Precipitation Physics in Hurricane Simulations
(American Meteorological Society, 2012)umerical weather prediction models play a major role in weather forecasting, especially in cases of extreme events. The Weather Research and Forecasting Model (WRF), among others, is extensively used for both research and ... -
Radar Signatures of Tropical Cyclone Tornadoes in Central North Carolina
(American Meteorological Society, 2007)During the tropical cyclone season of 2004, there were four tropical cyclones that spawned tornadoes in central North Carolina: Frances, Gaston, Ivan, and Jeanne. This study examines the environmental characteristics and ... -
Population Influences on Tornado Reports in the United States
(American Meteorological Society, 2007)The number of tornadoes reported in the United States is believed to be less than the actual incidence of tornadoes, especially prior to the 1990s, because tornadoes may be undetectable by human witnesses in sparsely ... -
Influence of Initial Conditions on the WRF–ARW Model QPF Response to Physical Parameterization Changes
(American Meteorological Society, 2007)To assist in optimizing a mixed-physics ensemble for warm season mesoscale convective system rainfall forecasting, the impact of various physical schemes as well as their interactions on rainfall when different initializations ... -
Ceiling and Visibility Forecasts via Neural Networks
(American Meteorological Society, 2007)Statistical postprocessing of numerical model output can improve forecast quality, especially when model output is combined with surface observations. In this article, the development of nonlinear postprocessors for the ... -
An Assessment of Marine Surface Winds from the Australian Bureau of Meteorology Numerical Weather Prediction Systems
(American Meteorological Society, 2007)A method for routinely verifying numerical weather prediction surface marine winds with satellite scatterometer winds is introduced. The marine surface winds from the Australian Bureau of Meteorology?s operational global ... -
Summer Rainfall Forecast Spread in an Ensemble Initialized with Different Soil Moisture Analyses
(American Meteorological Society, 2007)The performance of an ensemble forecasting system initialized using varied soil moisture alone has been evaluated for rainfall forecasts of six warm season convective cases. Ten different soil moisture analyses were used ... -
Increasing the Reliability of Reliability Diagrams
(American Meteorological Society, 2007)The reliability diagram is a common diagnostic graph used to summarize and evaluate probabilistic forecasts. Its strengths lie in the ease with which it is produced and the transparency of its definition. While visually ... -
The Effect of Upstream Convection on Downstream Precipitation
(American Meteorological Society, 2007)Operational forecasters in the southeast and mid-Atlantic regions of the United States have noted a positive quantitative precipitation forecast (QPF) bias in numerical weather prediction (NWP) model forecasts downstream ... -
Estimating Hurricane Wind Structure in the Absence of Aircraft Reconnaissance
(American Meteorological Society, 2007)New objective methods are introduced that use readily available data to estimate various aspects of the two-dimensional surface wind field structure in hurricanes. The methods correlate a variety of wind field metrics to ...