Aviation Weather Observations vs. LAMP Forecasts with the Onset of Precipitation

Aviation Weather Observations vs. LAMP Forecasts with the Onset of Precipitation Aviation Weather Observations vs. LAMP Forecasts with the Onset of Precipitation BY DAVID E. RUDACK TABL E I. Definition of aviation flight categories. o the casual observer, precipitation events are as- sociated with reduced horizontal visibilities and/ Flight Visibility Tor lower cloud ceiling height.1 This agrees with Ceiling height (ft) category (miles) our experience that poor visibility and/or low ceiling heights are generally accompanied by a moisture-laden VLIFR < 200 and/or <0. 5 atmosphere. The astute observer would also notice occasions when horizontal visibilities improve and/ LIFR > 200 t o < 500 and/or 0.5- 1 or ceiling heights rise at the onset of precipitation for IFR > 500 t o < 1,000 and/or 1- 3 both trace and measurable precipitation events. Under- standing the relative frequency distribution of bot h the MVFR > 1,000 t o < 3,000 and/or 3- 5 lowering and rising of visibility and ceiling height in a window just prior to and shortly after precipitation VFR > 3,000 and > 5 begins is beneficial fro m a purely academic standpoint and crucial for generating accurate aviation forecasts in less tha n ideal weather conditions. Rules (VLIFR), Low Instrumen t Flight Rules (LIFR), Aviation flying http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the American Meteorological Society American Meteorological Society

Aviation Weather Observations vs. LAMP Forecasts with the Onset of Precipitation

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0477
D.O.I.
10.1175/2009BAMS2709.1
Publisher site
See Article on Publisher Site

Abstract

Aviation Weather Observations vs. LAMP Forecasts with the Onset of Precipitation BY DAVID E. RUDACK TABL E I. Definition of aviation flight categories. o the casual observer, precipitation events are as- sociated with reduced horizontal visibilities and/ Flight Visibility Tor lower cloud ceiling height.1 This agrees with Ceiling height (ft) category (miles) our experience that poor visibility and/or low ceiling heights are generally accompanied by a moisture-laden VLIFR < 200 and/or <0. 5 atmosphere. The astute observer would also notice occasions when horizontal visibilities improve and/ LIFR > 200 t o < 500 and/or 0.5- 1 or ceiling heights rise at the onset of precipitation for IFR > 500 t o < 1,000 and/or 1- 3 both trace and measurable precipitation events. Under- standing the relative frequency distribution of bot h the MVFR > 1,000 t o < 3,000 and/or 3- 5 lowering and rising of visibility and ceiling height in a window just prior to and shortly after precipitation VFR > 3,000 and > 5 begins is beneficial fro m a purely academic standpoint and crucial for generating accurate aviation forecasts in less tha n ideal weather conditions. Rules (VLIFR), Low Instrumen t Flight Rules (LIFR), Aviation flying

Journal

Bulletin of the American Meteorological SocietyAmerican Meteorological Society

Published: Jul 1, 2009

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