National Weather Service United States Department of Commerce

Fall Weather Pattern Arrives

Rain and much cooler temperatures behind a cold front will bring a feeling of fall to the east coast today. In addition, an active fall storm pattern developing in the Pacific Northwest this week will bring areas of heavy rains, and very high elevations could receive heavy snow. Wetting rains to the valley floors will spread south Thu and Fri into northern California,where active fires continue. Read More >

Overview

Slide 1 Introduction and Abstract
Slide 2 Associated Press Photo
Slide 3 A Brief History
Slide 4 Schematic of the Kansas Turnpike Video from 4/26/1991
Slide 5 Events in Oklahoma on 3 May 1999
Slide 6 Meteorological Reasons Why Highway Overpasses Are Inadequate Tornado Sheltering Areas
Slide 7 16th Street Overpass – Newcastle, Oklahoma
Slide 8 Shields Boulevard Overpass - Moore Part I
Slide 9 Shields Boulevard Overpass - Moore Part II
Slide 10 The Crescent/Mulhall/Perry Tornado
Slide 11 A Tornado and an Overpass - What is Reality?
Slide 12 Misconception of Tornadic Winds - Part I
Slide 13 Misconception of Tornadic Winds - Part II
Slide 14 A More Realistic Conception of Tornadic Winds - Part I
Slide 15 A More Realistic Conception of Tornadic Winds - Part II
Slide 16 Other Severe Weather Threats in Addition to Tornadoes
Slide 17 Examples of Other Severe Weather Threats - Gainesville TX – 26 April 1994 and Jarrell TX – 27 May 1997
Slide 18 Examples of Other Severe Weather Threats - Lancaster TX – 25 April 1994
Slide 19 Examples of Other Severe Weather Threats - Minneapolis/St. Paul Hail/Windstorm and Flash Flood – 1 July 1997
Slide 20 How Can Meteorologists Assist in Solving This Problem?
Slide 21 Current Safety Guidelines for Well Constructed Buildings are Extremely Effective
Slide 22 Close Examination of the Current Open-Country Safety Guidelines
Slide 23 Non-Meteorological Reasons Why Highway Overpasses Are Dangerous Severe Storm and Tornado Sheltering Areas
Slide 24 How Do We Minimize the Use of Overpasses as Sheltering Areas?
Slide 25 Acknowledgments