Radio Shack 20-501 ユーザーズマニュアル

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Beyond the Basics
36
Skywarn
The skywarn function lets you jump directly to the 
last channel in memory (Channel 200) from any 
mode by pressing FUNC + 
. The scanner goes 
into scan hold mode and starts receiving 
transmissions in the last channel. If no frequency is 
programmed in the last channel, No Prg appears 
and the scanner sounds an error tone.
about Skywarn
Skywarn is an organized group of trained weather 
observers. A Skywarn group exists in virtually every 
US county with a significant population. During 
inclement weather, reports made by Skywarn 
observers include information about:
pea-sized and larger hail
wind and wind gusts 40 MPH and greater
heavy rainfall
lightning (cloud-to-cloud and especially cloud-
to-ground)
wall clouds seen in severe thunderstorms 
(which spawn tornadoes)
severe lowering of a wall cloud
turbulence in a wall cloud
funnel clouds
tornadoes