TORNADO
Tornado
Tornado is strong wind, but strong wind not necessarily call tornado, depend on wind speed which accompany. Tornado incident is short between 3-5 minutes. After that there is strong wind which gradually the wind speed become weak, whereas strong wind can happen more than 30 minutes. In fact can happen more than one day with the average speed 20-30 knot, while tornado speed usually can achieve 40-50 km/hour or more with very short duration and not same with storm phenomenon which often bumb into USA, Australian, Philipine, Japan, Korean or Chinese.
Tornado only come from cumulusnimbus cloud, not from monsoon wind rotation or rotation wind as usual. So tornado can move/shift from long press to short press. Tornado very difficult to prediction, but we can know the dangerous signal where tornado will come. The sign is at 10.00 am there is cumulus cloud, between the cloud there is one cloud kind which has boundary edge very clear the colour is grey which towering as cauliflower. The colour cloud will fast change became dark black. Look at trees around the place where we stand up, are there branch or twig that has been rock fast. If there, so rain and strong wind will come.
