Rain (or snow) will fall: Within five minutes after the arch of the thundercloud is seen to move toward one.
When this tendency becomes so strong that the resistance of the intervening air is counteracted the electric discharge between thundercloud and earth takes place.
Within an hour after the pavement-like, but scarcely discernible, thundercloud consolidates along the west, if the wind is from the southwest.
For an hour or more from a thundercloud that rises on a southwest or southeast wind.
If a thundercloud looks particularly black or if it can be seen in commotion think of hail and seek shelter.
Also the first few drops that come from the thick, hot lips of the thundercloud are usually immense.
To the right of Subasio, where the passes go from Foligno towards Urbino and Ancona, heavy masses of thundercloud hang every day; but the plain and hill-buttresses are clear in transparent blueness.
There was a tract of yellow sunset sky to westward, a faint new moon half swathed in mist above, and over all the north a huge towered thundercloudkept flashing distant lightnings.
When the statues and foliation are once got, as much blue mist and thundercloud as you choose, but not before.
A black thundercloud may literally be dashing itself in his face, while the blue hills seen through its rents maybe thirty miles away.
If Maro wears that thundercloud on his mug all the time, he'd frighten a Hottentot, much more a civilized girl.
Why don't you brace up and chase that thundercloud off your face?
When a thundercloud charged with electricity passes over the ground, it induces a charge of an opposite kind upon it.
Similarly, if the insulating air cannot resist the attraction between the thundercloud and the earth, it will be ruptured by a flash of lightning.
The yews of Nutley hung like a thundercloud across a band of scarlet, and the distant hills were all soft greys and purples.
Before they had ridden another furlong, outlying scuds of the thundercloudcame drifting towards them.
The purple edge of a thundercloud was looming up over the city, deepening every patch of colour in the streets, and making the vanes and steeples shine like gold.
Next morning we breakfasted under a thundercloud with Egerton grinning inside his skin, and looking like 'Won't you catch it, that's all!
Probably much the most frequent lightning flashes are those that occur within a single thundercloud and do not reach the earth.
Isaac glanced at Thundercloudand the other Indians near by.
After a few moments of forgetfulness Myeerah spoke to Thundercloudand waved her hand toward the west.
Oh, how I wish you and Jonathan could have seen Thundercloud and his two hundred warriors ride into Cornplanter's camp.
An Indian touched Isaac on the arm and silently pointed toward the huge maple tree under which Thundercloud and Myeerah were sitting.
Thundercloud sat rigid upon his stallion; his head held high; every muscle tense and strong for instant action.
They were soon up to the spot where Jimmy had come to grief, when, thundering down the gully, the horse made a shy at the prostrate coachman, shooting off Thundercloud and Red Murphy.
There is no local reason assignable for the presence of the cirri above, or of the thundercloud below.
With it the experimenters charged the Leyden jar, whose discharges afterwards proved the identity of the electricity of the thundercloud with the electricity of the machine.
A thundercloudpassed over, and nothing seemed to happen.
It was as though a thundercloud of unequal electricities hung over him, irritating his nerve current, trying to annihilate it through neutralization.
These flapped away heavily on the near approach of the horseman, and rising high overhead, were soon winging their aerial course seemingly to the thundercloud itself.
A shimmer of heat lay over the wide veldt, and a thundercloud was gathering black upon the craggy turrets cresting the distant spurs of the Stormberg mountains.
Stead of that, you go round as glum as a thundercloud and now want to go ragin' home to her.
Away cantered Timothy, and soon caused a flutter of expectancy in the Weeks household, by announcing that "Old Holcroft looked black as a thundercloud and was comin' himself.
