I have no idea myself. I've been looking around for hours; I even changed the water levels to the floor to top to see if it had a difference-nope-no difference. It's rather annoying since people and websites say there are when I haven't seen a single one for hours. Best give up buddy.
Dark dust clouds are largely misnamed because they are not actually darker in color, but instead block the light from stars behind them, giving the appearance of darkness. These clouds are composed of gas, dust, and other materials that can obscure the light from stars and other celestial objects. The term "dark" refers more to their ability to block light rather than their actual color.
Clouds can appear yellow due to the scattering of sunlight by particles in the atmosphere, such as dust or pollution. This can give the clouds a yellow tint when viewed from certain angles or during sunrise or sunset.
Molecular clouds
Clouds form when water droplets condense around tiny particles called cloud condensation nuclei, which can be dust, pollution, or salt crystals in the atmosphere. These particles provide a surface for water vapor to gather and form droplets, eventually leading to the formation of clouds.
Nimbus clouds are the type of clouds that typically hold precipitation, such as rain or snow. These clouds are often thick and dark in appearance, indicating that they are heavily saturated with moisture and are likely to release precipitation.
Castelia City, Desert Resort, Black City, or dust clouds
Caves sometimes have dust clouds. You may receive a Fire Stone by walking into one of these or by answering "Pansear" to a man in Castelia City.
tall grass, water, sand, and cement in the castelia sewers
Castelia City Sewers, Route 9 Hidden Grotto - Route 9
Dust sticks to clouds, because of electricity.
Since Eevee is a wild pokemon in Black and White 2 you can catch as many Eevee as you'd like. Eevee's can be found in the Castelia Park at the end of the Castelia Sewers.
clouds of dust and gas
they could be dust clouds.
You can find a Fire Stone by talking to man on the pier south of Castelia City's entrance. You can also find one Northwest of Psychic Gaven in the Desert Resort. Another method is by walking into dust clouds inside caves (though you won't always find a fire stone in these clouds).
no clouds are formed from dust particules and water
You'll eventually find Fire Stones throughout the game. One way you can obtain a Fire Stone is talking to a man in Castelia City on the right end of the docks. He'll ask you if you have either a Panpour, Pansage, or Pansear. Pick Pansear and you'll recieve a Fire Stone from that man. Another way you can obtain Fire Stones is going into caves and obtaining them from dust clouds, although obtaining them from dust clouds is rare.
No.