Tropical Depression Bertha Lifting North; Isolated Severe Across Southern U.S.; Heat Continues In West

Tropical Depression Bertha continues to weaken and lift north toward the central Appalachians and eastern Ohio Valley. Heavy rain, gusty winds and flooding are likely. Meanwhile, isolated severe thunderstorms are possible on Thursday from the Southeast to south-central High Plains. Finally, the ongoing heat wave continues in the West and will expand into the Rockies by the weekend. Read More >

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April 3, 1974 technical reports

Chronological Issuance of Severe Thunderstorm and Tornado Warnings, WSFO Louisville, April 3-4, 1974
Kentucky Tornado Descriptions and NWS Watch and Warning Issuances
Warnings issued by NWSFO Indianapolis
Details Concerning 7 Primary Tornado Tracks in Indiana on April 3, 1974
Fujita Questionnaire (bottom half pertains to April 3)
Preliminary Report: The Widespread Tornado Outbreak of April 3-4, 1974 (issued April 29, 1974, 10 pages)
Natural Disaster Survey Report 74-1, The Widespread Tornado Outbreak of April 3-4, 1974 (issued December 1974, 47 pages)
Synoptic Analysis (October 1975, 52 pages)
Engineering Aspects of the Tornadoes of April 3-4, 1974 (1975, 120 pages)
The Super Outbreak: Outbreak of the Century (presented October 5, 2004, 12 pages)

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