Weather and Forecasting: Recent submissions
Now showing items 2521-2540 of 3043
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Discriminating between Tornadic and Nontornadic Thunderstorms Using Mesoscale Model Output
(American Meteorological Society, 1997)The ability to discriminate between tornadic and nontornadic thunderstorms is investigated using a mesoscale model. Nine severe weather events are simulated: four events are tornadic supercell thunderstorm outbreaks that ... -
Objective Identification of Cyclones and Their Circulation Intensity, and Climatology
(American Meteorological Society, 1997)An updated procedure for objective identification and tracking of surface cyclones from gridded analyses is described. Prior smoothing of the raw data with a constant radius spatial filter is used to remove distortions ... -
Changes to the 1995 NCEP Operational Medium-Range Forecast Model Analysis–Forecast System
(American Meteorological Society, 1997)Recent changes in the operational National Centers for Environmental Prediction (formerly the National Meteorological Center) global analysis?forecast system are described. The most significant analysis change was the ... -
“Bookend Vortex” Induced Tornadoes along the Natchez Trace
(American Meteorological Society, 1997)This study focuses on the evolution of the northern end of a bow echo that moved across parts of southwest Mississippi on 8 May 1995. A well-defined, cyclonically rotating ?comma head echo? developed north of Natchez, ... -
Synoptic-Scale Features Associated with Warm Season Heavy Rainfall over the Interior Southeastern United States
(American Meteorological Society, 1997)Previous research has established links between heavy rainfall and a wide variety of synoptic features and parameters. In this study, 312 heavy rainfall events are identified over the southeastern United States and used ... -
Fog Forecasting for the Southern Region: A Conceptual Model Approach
(American Meteorological Society, 1997)The prediction of fog occurrence, extent, duration, and intensity remains difficult despite improvements in numerical guidance and modeling of the fog phenomenon. This is because of the dependency of fog on microphysical ... -
Operations of the National Weather Service Spaceflight Meteorology Group
(American Meteorological Society, 1997)Weather is a significant aspect of most space shuttle launches and landings. The National Weather Service Spaceflight Meteorology Group (SMG) at Johnson Space Center (JSC) in Houston, Texas, provides weather forecasts and ... -
A Statistical Method for Forecasting Rainfall over Puerto Rico
(American Meteorological Society, 1997)Using results from a factor analysis regionalization of nontropical storm convective rainfall over the island of Puerto Rico, a statistical methodology is investigated for its potential to forecast rain events over limited ... -
Physical Initialization and Hurricane Ensemble Forecasts
(American Meteorological Society, 1997)Ensemble forecasting of hurricane tracks is an emerging area in numerical weather prediction. In this paper, the spread of the ensemble of forecast tracks from a family of different First Global GARP (Global Atmospheric ... -
A WSR-88D Assessment of Tropical Cyclone Outer Rainband Tornadoes
(American Meteorological Society, 1997)As part of the National Weather Service (NWS) Modernization and Restructuring Program, WSR-88D (NEXRAD) Doppler radar installation has been completed at each Weather Service Office in Florida. Recently, this powerful new ... -
VIL Density as a Hail Indicator
(American Meteorological Society, 1997)In current severe thunderstorm warning operations, forecasters frequently use the vertically integrated liquid water content (VIL) product from the WSR-88D to estimate thunderstorm severity and, particularly, hail size. ... -
A Comparison of WSR-88D Storm Total Precipitation Performance during Two Tropical Systems following Changes to the Multiplicative Bias and Upper Reflectivity Threshold
(American Meteorological Society, 1997)Seventy-two hours of Melbourne, Florida (KMLB), Weather Surveillance Radar 1988 Doppler (WSR-88D) rainfall data were compared with rain gauge data during Tropical Storm Gordon as it impacted east-central Florida. Comparisons ... -
Warm Season Cloud-to-Ground Lightning–Precipitation Relationships in the South-Central United States
(American Meteorological Society, 1997)This study examines the relationship between cloud-to-ground (CG) lightning and surface precipitation using observations from six regions (each on the order of 10000 km2), April through October (1989?93), in the south-central ... -
A 10-yr Monthly Lightning Climatology of Florida: 1986–95
(American Meteorological Society, 1997)Average cloud-to-ground lightning flash density values for Florida have been calculated for the 10-yr period 1986?95. An annual mean map and monthly mean maps were constructed from a database exceeding 25 million flashes. ... -
Characteristics of Cloud-to-Ground Lightning Associated with Violent Tornadoes
(American Meteorological Society, 1997)Cloud-to-ground (CG) lightning patterns were analyzed in 42 violent tornado-producing (F4, F5) supercells that occurred between January 1989 and November 1992. The purpose of this analysis was to identify potential ... -
Peninsular Florida Tornado Outbreaks
(American Meteorological Society, 1997)An analysis of statistics for 1448 tornadoes documented by the National Severe Storms Forecast Center from 1950 through 1994 at, or south of, 30° latitude in Florida was completed to determine the definition of a peninsular ... -
STORMTIPE-95: Results from a Convective Storm Forecast Experiment
(American Meteorological Society, 1997)During the spring of 1995, an operational forecast experiment using a three-dimensional cloud model was carried out for the north Texas region. Gridpoint soundings were obtained from the daily operational numerical weather ... -
The Discrimination between Tornadic and Nontornadic Supercell Environments: A Forecasting Challenge in the Southern United States
(American Meteorological Society, 1997)Recent results from storm-scale modeling experiments have suggested that the strength of the 3?7-km storm-relative wind plays a very important role in determining whether or not a storm that already exhibits midlevel updraft ... -
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Comments on “An Interesting Mesoscale Storm–Environment Interaction Observed Just Prior to Changes in Severe Storm Behavior”
(American Meteorological Society, 1997)No abstract available.