A horizontal, dark cumulonimbus base that has no visible precipitation beneath it. This structure usually marks the location of the thunderstorm updraft. Tornadoes most commonly develop (1) from wall clouds that are attached to the rain-free base, or (2) from the rain-free base itself. This is particularly true when the rain-free base is observed to the south or southwest of the precipitation shaft.
Storm report
Rain-Free Base
Also on 9 November
So close to 9cm hail!
Bit of a surprise chase today beginning in my suburb and ending at Wisemans Ferry. Because that is what it took for me to get i…
9 Nov 2022 · Wisemans Ferry, NSW, NSW
Significant rain and flooding New South Wales, ACT and Victoria – 31 October to 3 November 2022
9 Nov 2022 · New South Wales, NSW
Convective Storms – New South Wales South Coast – Monday 7 November 2022
9 Nov 2022 · Batemans Bay, NSW, NSW
Bit of a surprise chase today beginning in my suburb and ending at Wisemans Ferry. Because that is what it took for me to get in front given road cond…
9 Nov 2021 · Wisemans Ferry, NSW, NSW
This is one of my efforts of Sydney’s lightning – it is an anvil crawler – usual…
9 Nov 2020 · Sydney, NSW, NSW
Another cropped anvil crawler from last night
9 Nov 2020 · Sydney, NSW, NSW
Insane Mothership Structure 27 May 2001
9 Nov 2020 · Lawton, OK, OK, US
New video by Jimmy Deguara
9 Nov 2020 · Dodge City, KS, KS, US
Storm Chasing Booking Page – Storm Chasing Tours
9 Nov 2020
www.extremestorms.com.au
9 Nov 2020 · Dodge City, KS, KS, US