Weather and Forecasting: Recent submissions
Now showing items 1441-1460 of 3043
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A Climatology of Synoptic Conditions Associated with Significant Tornadoes across the Southern Appalachian Region
(American Meteorological Society, 2006)A 54-yr climatology (1950?2003) of synoptic conditions associated with significant (F2 or greater) tornado events in the southern Appalachian region was compiled to 1) investigate the observed relative minimum of tornadoes ... -
An Observational Examination of Long-Lived Supercells. Part II: Environmental Conditions and Forecasting
(American Meteorological Society, 2006)The local and larger-scale environments of 184 long-lived supercell events (containing one or more supercells with lifetimes ≥4 h; see Part I of this paper) are investigated and subsequently compared with those from 137 ... -
Rapid Scan Views of Convectively Generated Mesovortices in Sheared Tropical Cyclone Gustav (2002)
(American Meteorological Society, 2006)On 9?10 September 2002, multiple mesovortices were captured in great detail by rapid scan visible satellite imagery in subtropical, then later, Tropical Storm Gustav. These mesovortices were observed as low-level cloud ... -
Verification of Surface Temperature Forecasts from the National Digital Forecast Database over the Western United States
(American Meteorological Society, 2006)Experimental gridded forecasts of surface temperature issued by National Weather Service offices in the western United States during the 2003/04 winter season (18 November 2003?29 February 2004) are evaluated relative to ... -
The 19 April 1996 Illinois Tornado Outbreak. Part II: Cell Mergers and Associated Tornado Incidence
(American Meteorological Society, 2006)In the 19 April 1996 Illinois tornado outbreak, cell mergers played a very important role in the convective evolution. With a large number of cells forming within a short time period, the early stages of cell organization ... -
The 19 April 1996 Illinois Tornado Outbreak. Part I: Cell Evolution and Supercell Isolation
(American Meteorological Society, 2006)In this study of the 19 April 1996 Illinois tornado outbreak, 109 cells were tracked using radar data to understand the transition of the cell configuration from a considerable number of initial cells to a small subset of ... -
Precursors to Convection over Peninsular India during March–May in AMSU-B Data
(American Meteorological Society, 2006)In the present work the locations of precursors to summer thunderstorms over peninsular India are sought in images from the Advanced Microwave Sounding Unit-B (AMSU-B). At these locations, moisture maxima and brightness ... -
Operational Performance of a New Barotropic Model (WBAR) in the Western North Pacific Basin
(American Meteorological Society, 2006)The Weber barotropic model (WBAR) was originally developed using predefined 850?200-hPa analyses and forecasts from the NCEP Global Forecasting System. The WBAR tropical cyclone (TC) track forecast performance was found ... -
CORRIGENDUM
(American Meteorological Society, 2006) -
Impact of Four-Dimensional Variational Data Assimilation of Atmospheric Motion Vectors on Tropical Cyclone Track Forecasts
(American Meteorological Society, 2006)The fifth-generation Pennsylvania State University?National Center for Atmospheric Research nonhydrostatic Mesoscale Model is employed to evaluate the impact of the Geostationary Meteorological Satellite-5 water vapor and ... -
Passive-Microwave-Enhanced Statistical Hurricane Intensity Prediction Scheme
(American Meteorological Society, 2006)The formulation and testing of an enhanced Statistical Hurricane Intensity Prediction Scheme (SHIPS) using new predictors derived from passive microwave imagery is presented. Passive microwave imagery is acquired for ... -
NASA MODIS Previews NPOESS VIIRS Capabilities
(American Meteorological Society, 2006)The Visible/Infrared Imager Radiometer Suite (VIIRS), scheduled to fly on the satellites of the National Polar-orbiting Operational Environmental Satellite System, will combine the missions of the Advanced Very High ... -
Using Radar Wind Observations to Improve Mesoscale Numerical Weather Prediction
(American Meteorological Society, 2006)A high-resolution radar data assimilation system is presented for high-resolution numerical weather prediction models. The system is under development at the Naval Research Laboratory for the Navy?s Coupled Ocean?Atmosphere ... -
The Sensitivity of Numerical Forecasts to Convective Parameterization: A Case Study of the 17 February 2004 East Coast Cyclone
(American Meteorological Society, 2006)The sensitivity of numerical model forecasts of coastal cyclogenesis and frontogenesis to the choice of model cumulus parameterization (CP) scheme is examined for the 17 February 2004 southeastern U.S. winter weather event. ... -
A Real-Time, Three-Dimensional, Rapidly Updating, Heterogeneous Radar Merger Technique for Reflectivity, Velocity, and Derived Products
(American Meteorological Society, 2006)With the advent of real-time streaming data from various radar networks, including most Weather Surveillance Radars-1988 Doppler and several Terminal Doppler Weather Radars, it is now possible to combine data in real time ... -
Research Aircraft and Wind Profiler Observations in Gastineau Channel during a Taku Wind Event
(American Meteorological Society, 2006)The flow in Gastineau Channel near Juneau, Alaska, during the moderate Taku wind event of 18 October 2004 is examined using observations from the University of Wyoming?s King Air research aircraft, two wind profilers, and ... -
Sensitivity of Several Performance Measures to Displacement Error, Bias, and Event Frequency
(American Meteorological Society, 2006)The sensitivity of various accuracy measures to displacement error, bias, and event frequency is analyzed for a simple hypothetical forecasting situation. Each measure is found to be sensitive to displacement error and ... -
Operational Impact of QuikSCAT Winds at the NOAA Ocean Prediction Center
(American Meteorological Society, 2006)The NASA Quick Scatterometer (QuikSCAT) has revolutionized the analysis and short-term forecasting of winds over the oceans at the NOAA Ocean Prediction Center (OPC). The success of QuikSCAT in OPC operations is due to the ... -
Tornadoes in Environments with Small Helicity and/or High LCL Heights
(American Meteorological Society, 2006)Recent studies have suggested that supercell tornado environments are usually associated with large 0?1-km storm-relative helicity (SRH) and relatively low lifting condensation levels (LCL heights). However, occasional ... -
Intraseasonal Variability of Summer Storms over Central Arizona during 1997 and 1999
(American Meteorological Society, 2006)Although previous climatologies over central Arizona show a summer diurnal precipitation cycle, on any given day precipitation may differ dramatically from this climatology. The purpose of this study is to investigate the ...