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9780309093163

Flash Flood Forecasting over Complex Terrain : With an Assessment of the Sulphur Mountain NEXRAD in Southern California

by ;
  • ISBN13:

    9780309093163

  • ISBN10:

    0309093163

  • Format: Paperback
  • Copyright: 2005-01-28
  • Publisher: Natl Academy Pr

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Summary

The nation's network of more than 130 Next Generation Radars (NEXRADs) is used to detect wind and precipitation to help National Weather Service forecasters monitor and predict flash floods and other storms. This book assesses the performance of the Sulphur Mountain NEXRAD in Southern California, which has been scrutinized for its ability to detect precipitation in the atmosphere below 6000 feet. The book finds that the Sulphur Mountain NEXRAD provides crucial coverage of the lower atmosphere and is appropriately situated to assist the Los Angeles-Oxnard National Weather Service Forecast Office in successfully forecasting and warning of flash floods. The book concludes that, in general, NEXRAD technology is effective in mountainous terrain but can be improved.

Table of Contents

Executive Summary 1(8)
Introduction
9(3)
Flash Floods
12(14)
The Physical Processes of Flash Floods
13(13)
The National Weather Service and Flash Floods
26(9)
The Modernization and Associated Restructuring of the National Weather Service
27(2)
The Process of Issuing Flash Flood Forecasts, Watches, and Warnings
29(6)
Nexrad
35(24)
The NEXRAD Network
35(5)
NEXRAD Scan Strategies
40(1)
Precipitation Estimation
41(8)
The Evolving NEXRAD System
49(2)
Siting of the NEXRADs
51(8)
Observational Challenges of Low-Level Radar Coverage in Complex Terrain and Coastal Areas
59(15)
Beam Visibility
60(1)
Propagation of Electromagnetic Radar Signals
61(13)
Flash Flood Warning Process in Los Angeles and Ventura Counties
74(17)
Rainfall Records for Los Angeles and Ventura Counties
77(5)
The NWS Los Angeles-Oxnard Flash Flood Warning Process
82(3)
Private Sector Role in Forecasts and Dissemination
85(1)
Stakeholders
86(2)
Need for Multigency and Public Collaboration
88(3)
Evaluation of the Sulphur Mountain Radar and Flash Flood Warnings in Los Angeles and Ventura Counties
91(26)
Radar Coverage
91(9)
Availability of the Sulphur Mountain Radar
100(1)
Flash Flood Warning Statistics
101(16)
Potential Improvements in Flash Flood Warnings
117(29)
Nexrad and Other Radar Sources
118(17)
Modeling, Data Assimilation, and Decision Support Systems
135(11)
Concluding Thoughts
146(3)
REFERENCES
149
APPENDIXES
A Origin of the Study
169(3)
B Characteristics of the NEXRAD Radar
172(3)
C Chronology of the Siting of the Sulphur Mountain NEXRAD
175(1)
D National Weather Service Flash Flood Verification Procedures
176(4)
E Acronyms
180(4)
F Community Participation
184(2)
G Committee and Staff Biographies
186

Supplemental Materials

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The New copy of this book will include any supplemental materials advertised. Please check the title of the book to determine if it should include any access cards, study guides, lab manuals, CDs, etc.

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