Weather and Forecasting: Recent submissions
Now showing items 2241-2260 of 3043
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Observations of a Severe Left Moving Thunderstorm
(American Meteorological Society, 2001)Observations have shown that right moving thunderstorms are favored in environments characterized by clockwise-turning hodographs. There are, however, a few observational and numerical studies of long-lived, left moving ... -
Improvements in the Seasonal Forecasting of Tropical Cyclone Activity over the Western North Pacific
(American Meteorological Society, 2001)A recent scheme to predict tropical cyclone (TC) activity over the western North Pacific partially failed in 1997 and 1998, during which a warm and a cold event of the El Niño?Southern Oscillation (ENSO) occurred, respectively. ... -
Winter Lightning and Heavy Frozen Precipitation in the Southeast United States
(American Meteorological Society, 2001)This study addresses winter season lightning by examining synoptic-scale circulations, cloud-to-ground (CG) lightning patterns, and frozen precipitation. Specifically, locations, frequencies, and polarities of CG flashes ... -
The Use of Ensembles to Identify Forecasts with Small and Large Uncertainty
(American Meteorological Society, 2001)In the past decade ensemble forecasting has developed into an integral part of numerical weather prediction. Flow-dependent forecast probability distributions can be readily generated from an ensemble, allowing for the ... -
The Utility of Additional Soundings for Forecasting Lake-Effect Snow in the Great Lakes Region
(American Meteorological Society, 2001)The impact of initializing a mesoscale model with additional sounding data over the Great Lakes region is investigated. As part of the Lake-Induced Convection Experiment (Lake-ICE) field study during the winter of 1997/98, ... -
Cold Pools in the Columbia Basin
(American Meteorological Society, 2001)Persistent midwinter cold air pools produce multiday periods of cold, dreary weather in basins and valleys. Persistent stable stratification leads to the buildup of pollutants and moisture in the pool. Because the pool ... -
Analysis of Surface Winds at Mawson, Antarctica
(American Meteorological Society, 2001)An analysis is made of the wind regime at Mawson, Antarctica, to distinguish the meteorological characteristics leading to the gale force winds associated with blizzards as distinct from calm conditions or the relatively ... -
Ensemble Forecast of a Typhoon Flood Event
(American Meteorological Society, 2001)A high-resolution nested regional spectral model and an ensemble prediction system are combined to forecast the track, intensity, and flooding precipitation arising from Typhoon Winnie of August 1997, which eventually ... -
Tornadogenesis and Operational Considerations of the 11 August 1999 Salt Lake City Tornado as Seen from Two Different Doppler Radars
(American Meteorological Society, 2001)On 11 August 1999 a climatologically rare F2 tornado developed just west of downtown Salt Lake City, Utah (SLC), and moved directly through the city during the noon hour. Tornadogenesis was observed from a mountaintop ... -
Experimental Test of the Effects of Z–R Law Variations on Comparison of WSR-88D Rainfall Amounts with Surface Rain Gauge and Disdrometer Data
(American Meteorological Society, 2001)Reflectivity factors and rainfall rates found from Level II WSR-88D data for the National Weather Service (NWS) radar in Greer, South Carolina (KGSP), are compared with similar parameters found from disdrometer data collected ... -
Beta Test of the Systematic Approach Expert System Prototype as a Tropical Cyclone Track Forecasting Aid
(American Meteorological Society, 2001)The authors have developed error mechanism conceptual models with characteristic track departures and anomalous wind or sea level pressure patterns for dynamical tropical cyclone track predictions primarily occurring in ... -
Weekly Precipitation Cycles along the Northeast Corridor?
(American Meteorological Society, 2001)Twenty years of precipitation data from seven cities along or near the east coast of the United States from the northern mid-Atlantic region to northern New England have been analyzed to determine if there are any weekly ... -
Examination of Derecho Environments Using Proximity Soundings
(American Meteorological Society, 2001)Observed upper air soundings that occurred within 2 h and 167 km of derechos were collected and analyzed to document atmospheric stability and wind shear conditions associated with long-lived convective windstorms. Sixty-seven ... -
Synthetic Aperture Radar Observations of the Surface Signatures of Cold-Season Bands over the Great Lakes
(American Meteorological Society, 2001)An important aspect of operational meteorology in and around the Great Lakes region of the United States and Canada in the winter months is the forecasting of lake-effect precipitation. While the synoptic- and mesoscale ... -
Topographic Distortion of a Cold Front over the Snake River Plain and Central Idaho Mountains
(American Meteorological Society, 2001)The topographic distortion of a cold front over the Snake River Plain (SRP) and central Idaho Mountains on 3 December 1998 is described using high-density surface observations from MesoWest, a collection of meteorological ... -
Observations of Mountain Wave–Induced Precipitation Shadows over Northeast Pennsylvania
(American Meteorological Society, 2001)WSR-88D depictions of two mountain wave?induced precipitation shadows observed near the Wyoming Valley of northeast Pennsylvania are presented. These mountain waves developed in similar synoptic environments that featured ... -
Comments on “A Quantitative Assessment of the NESDIS Auto-Estimator”
(American Meteorological Society, 2001) -
Using Spaceborne Synthetic Aperture Radar to Improve Marine Surface Analyses
(American Meteorological Society, 2001)The ever-changing weather and lack of in situ data in the Bering Sea warrants experimentation with new meteorological observing systems for this region. Spaceborne synthetic aperture radar (SAR) is well suited for observing ... -
Estimating Downburst-Related Maximum Surface Wind Speeds by Means of Proximity Soundings in New South Wales, Australia
(American Meteorological Society, 2001)A regional climatology of strong wind gusts associated with thunderstorms is presented, and the ability to estimate gust strength from ambient conditions is tested. Strong wind events were selected for 10 stations in New ... -
Development of a Discriminant Analysis Mixed Precipitation (DAMP) Forecast Model for Mid-Atlantic Winter Storms
(American Meteorological Society, 2001)The frequency of ?wintry mix? precipitation?freezing rain and ice pellets?is considerable in the mid-Atlantic region of the United States. Despite the fact that the general conditions necessary to support the various winter ...