Signs of a tornado ?
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Signs of a tornado ?

[From: ] [author: ] [Date: 11-04-29] [Hit: ]
Whirling dust or debris on the ground under a cloud base -- tornadoes sometimes have no funnel!Hail or heavy rain followed by either dead calm or a fast, intense wind shift. Many tornadoes are wrapped in heavy precipitation and cant be seen.Day or night - Loud, continuous roar or rumble,......
from the SPC site:

Know the signs of a tornado: Weather forecasting science is not perfect and some tornadoes do occur without a tornado warning. There is no substitute for staying alert to the sky. Besides an obviously visible tornado, here are some things to look and listen for:
Strong, persistent rotation in the cloud base.

Whirling dust or debris on the ground under a cloud base -- tornadoes sometimes have no funnel!

Hail or heavy rain followed by either dead calm or a fast, intense wind shift. Many tornadoes are wrapped in heavy precipitation and can't be seen.

Day or night - Loud, continuous roar or rumble, which doesn't fade in a few seconds like thunder.

Night - Small, bright, blue-green to white flashes at ground level near a thunderstorm (as opposed to silvery lightning up in the clouds). These mean power lines are being snapped by very strong wind, maybe a tornado.

Night - Persistent lowering from the cloud base, illuminated or silhouetted by lightning -- especially if it is on the ground or there is a blue-green-white power flash underneath.
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