Search Results

You are looking at 81 - 90 of 2,485 items for :

  • Forecasting techniques x
  • Journal of Applied Meteorology and Climatology x
  • Refine by Access: Content accessible to me x
Clear All
H. Stuart Muench

polar outbreak.1. Introduction In recent years there has been a distinct trend towardintroducing objective 1000-mb and 500-mb prognostication techniques into the elementary synoptic laboratorycourses. At many schools forecast models similar tothose of Estoque (1956) and Reed (1958) have beendeveloped and gradually modified to a point of maximum simplicity as well as accuracy. Often, the originalmodel is published but not the modifications.2. Experiences with "Reed" model At the University of

Full access
Thomas A. Gleeson

OCTO/~ER1964 THOMAS A. GLEESON 529Probabilities of Pressure Heights Forecast by Graphical and Numerical MethodstTHOMAS A. GLEESON Florida State University(Manuscript received 13 May 1963, in revised form 8 May 1964)ABSTRACT A statistical theory developed previously is applied to two prediction techniques: graphical integration ofEstoque's baroclinic model and numerical

Full access
Bernard J. Morzuch and Cleve E. Willis

APmLI982 BERNARD J. MORZUCH AND CLEVE E. WILLIS 499Value of Weather Information in Cranberry Marketing DecisionsBERNARD J. MORZUCH AND CLEYE E. WILLISUniversity of Massachusetts, Amherst, MA 01003(Manuscript received 4 May 1981, in final form 3 February 1982)ABSTRACT Econometric techniques are used to establish a functional relationship between cranberry yields

Full access
Matthew E. Jeglum and Sebastian W. Hoch

. 2014 ; Jerrett et al. 2005 ; Coen et al. 2013 ), wind energy generation ( Wilczak et al. 2014 ), wildfire suppression and prediction ( Butler et al. 2006 ), agriculture ( Li et al. 2015 ), and emergency response and military operations ( Liu et al. 2008 ). Accurate forecasts of the surface and near-surface wind in complex terrain are important for these applications. Unfortunately, mesoscale models run at high resolution often fail to produce accurate simulations of the wind field in complex

Full access
Xiangde Xu, Lian Xie, Xinghong Cheng, Jianming Xu, Xiuji Zhou, and Guoan Ding

, and October of 2006, representing winter, spring, and autumn conditions, respectively. Note that except for August (for which forecasts were for 25 days because of the lack of observations for 26–31 August), full-month forecasts were made for January, April, and October. c. Nudging technique The general form of a Newtonian relaxation nudging scheme can be expressed as where α is the array of variables to be predicted, F denotes the array of the forcing function, x is the spatial dimensions

Full access
Christopher M. Hayden, William L. Smith, and Harold M. Woolf

troposphere moisture fields from radiances measured by theoperational polar orbiting NOAA satellites. Statistical evaluation of the technique demonstrates the viability of the approach. A case study with TIROS.N observations shows substantial improvement over currentoperational methods, and a qualitatively reasonable product. High moisture gradients are clearly definedand horizontal consistency is achieved. The technique appears useful for the initialization of subsynopticforecast models.1. Introduction

Full access
Ronald M. Reap and Donald S. Foster

based on the conditional severe local storm probabilities compare favorablywith operational convective outlooks.1. Introduction We have used the Model Output Statistics (MOS)technique of multiple screening regression to generate medium-range (12-$6h) probability forecasts ofthunderstorms and severe local storms. In this approach,probability forecasts of the predictands are derivedfrom a weighted linear combination of meteorologicalpredictom obtained from operational numerical models.This approach

Full access
A. Bellon and G. L. Austin

an interesting experiment whereha compared the performance of three techniques onthe same digital data sets. These techniques were thecomparatively elaborate echo tracking one of Dudaand Blackmer, one of his own design and an earlierversion of the present .procedure: The results weregenerally favorable for the technique .described here. In essence, the forecast procedure consists ofmaking digital, constant-altitude-plan-position-indicator (CAPPI) Cartesian maps with a minicomputer online with

Full access
Julia N. Paegle

are intended to incorporate nonlineareffects in the forecast of probability of precipitation. Aclimatology of these types is presented elsewhere(Paegle and Keirulff, 1974; hereafter referred to as I). A screening procedure was used to select the "best"linear predictors. Similar techniques were applied byKlein (1963, 1967, 1968), Klein et al. (1959, 1965), etc.Aubert et al. (1959) compared the screening procedurewith factor analysis techniques and did not note anysignificant differences.2

Full access
Steven J. Nieman, Johannes Schmetz, and W. Paul Menzel

) techniquecompares measured brightness temperatures to forecast temperature profiles and thus infers opaque cloud levels.In semitransparent or small subpixel clouds, the carbon dioxide (CO2) technique uses the ratio of radiancesfrom different layers of the atmosphere to infer the correct cloud height. In the water vapor (H20) technique,radiances influenced by upper-tropospheric moisture and 1RW radiances are measured for several pixels viewingdifferent cloud amounts, and their linear relationship is used to

Full access