spiral band

spiral band

[′spī·rəl ′band]
(meteorology)
Spiral-shaped radar echoes received from precipitation areas within intense tropical cyclones (hurricanes or typhoons); they curve cyclonically in toward the center of the storm and appear to merge to form the wall around the eye of the storm. Also known as hurricane band; hurricane radar band.
References in periodicals archive ?
Wagner (2002) separated Asgardaspira from Lytospira due to the presence in the former of an acute dorsal angulation generating a spiral band (the peripheral band of Wagner 2002, fig.
6.1) noted a deep sinus in Lytospira yochelsoni, the type species of Asgardaspira, culminating at an acute crest which is visible as a spiral band in his illustration.
The outer band related to spiral band associated with the cyclone has entered the land and we are expecting a landfall between 10 pm to 12 am".
The elaters of hornworts are morphologically more diverse than those of liverworts and can be rounded or elongate, sometimes branched, unicellular or multicellular, with irregularly thickened walls or with a discrete spiral band. The multicellular elaters, found in the genera Anthoceros and Phaeoceros, are sometimes called pseudo-elaters.
Because bands slipped off the chicks, we modified our banding technique by placing a plastic spiral band (QC Supply, Schuyler, NE) below the no.
humbug above), but with a diffuse, dark purple-brown spiral band more or less at mid-whorl, most noticeable on last whorl; edge of disc concave, with relatively weakly developed transverse partitions (adjacent to inner surface), except along smooth growing margin.
However a special mention needs to be made of the outer spiral bands. Here the winds are often no stronger than 10 to 20 knots, making it easy to dismiss the storms as mere showers, but the abundance of dry air aloft and strong shear in the lower levels often helps supercharge these storms.
Kallenbach, 1997: A theory for vortex Rossby-waves and its application to spiral bands and intensity changes in hurricanes.
They are composed of elongated fibroblasts in broad spiral bands and whirls mixed with collagen and elastin fibers.
base of shell with dark-red spiral bands. Shell dextral with ovate, horny and paucispiral operculum dark brown in color.
You will then see dark skies to your east or south as the outer spiral bands approach.
Two small tornadoes were observed near Riceboro in Liberty County and near Skidaway Island in Chatham County on September 1 in spiral bands ahead of Hermine.