Hailstorms Formation?
346255
I can't remember exactly but its something like this.  Large, tall clouds form.  Vapour freezes (hail). Updraught occurs which is strong enough to support the weight of the hailstones inside the cloud.  Hailstones move and collide  getting bigger until updraught can't support the weight anymore and they fall, air temperature is cool enough to keep stones frozen until they reach the ground.
590952
A front forms.\n\nIf the two air masses come from completely different source regions then you may be in for some stormy weather. Just depends on where they originate as to what type of front forms. Let me explain...\n\nIf an air mass originates over land it will be dry. It is said to be a continental air mass.\n\nIf it originates over water it will be moist & is said to be a maritime air mass.\n\nIf it originates over a tropical area...yes you guessed it... a tropical air mass & will be warm.\n\nIf it originates over a polar area it is said to be polar & will be cold.\n\nThere are different combinations of the above. You can have cP, cT, mP, & mT.\n\nIf a cP air mass from Canada rides south and meets up with a mT air mass from the south you are more than likely looking at some stormy weather...thunderstorms, hail, lightning, tornadoes.\n\nWhen two air masses that are completely different come together watch out for the skies!
366915
They are doing work with lasers on effecting weather and often people have 'cannons' for hail with the idea that the sound waves will break up the ice. I'm not sure about bombing the storm. Storms are created by a range of factors that would not be all effected by a bomb. The website is complicated but talks about the use of high frequency waves to achieve this. most military applications are to do with clearing fog etc...to allow for a strategic advantage.
861786
Call newschannel 3, I bet they would look into it.  Royal Norman may even already have an answer.  I have not seen them, though I live very close to you.  I'll have to keep my eye on the SE sky.  Do they occur at a certain time, or various times?  Are they low to the horizon?
374487
There are a couple of theories of why the sky turns green during severe weather; however moreso with hail rather than tornadoes.  Some scientists believe that hail within a thunderstorm cloud bend the light at a degree to create a green tint to the clouds.  Others also believe that the mixture of the water vapor, rain, ice, and hail within the clouds give the cloud itself a bluish tint.  Therefore when you mix the tint with the yellowing and reddening sunset, you get a green tint to the cloud.
982259
They are very rare, but I think as long as there is cold air clashing with warmer air (which can happen even in the winter), you can create conditions favorable to tornado developement. We had a severe snow storm in which we had thunder and lightning, the sky even turned slightly yellow....scary.
150999
To quote my source page:\n\n============================================================\nIs lightning ever seen during a snow storm? \n\n\n (100%, 2 ratings) submitted by Alatea (A, 93%, 2508 ratings), Oct 11, 05 \n\n(Answer last edited on Jan 28, 06)\nThe answer to the question of whether or not there can be thunder and lightning during a snowstorm is this. It is possible but it is quite rare. Here's why. \n\nA thunderstorm depends on rapidly rising moist warm air to produce the effects we see. These effects are, large volumes of rain in a short period of time, strongly gusting winds, hail, and of course lightning. When conditions aren't right (surface air is too cool and dry) it is impossible for air at the surface to rise fast and high enough to create a thunderstorm cell. Basically in winter the air is not warm or moist enough to produce thunderstorm cells.\n\nhttp://www.madsci.org/posts/archives/dec96/844703853.Es.r.html\n============================================================
2208
Sleet is formed by snow (single ice crystals) being formed in cold clouds and then falling through warmer air so that they begin to partially melt, falling as wet snow - sleet.\n\nHailstones form by water droplets freezing very quickly in a cloud so that they form a small blob or nucleus rather than the larger crystal formed by a slow freezing snow flake crystal. The nucleus continues to fall through the cloud until it meets a strong upcurrent of warmer damper air coming up from the ground.  This blows the ice droplet up into the colder part of the cloud.  the warm air surrounding the nucleus cools and the water in it condenses out and freezes onto the surface of the existing ice droplet making it larger and heavier.  This is cycle isrepeated until the updraught is not strong enough to keep the hailstone airborne and it (and the millions of others with it) drop to the ground.\n\nThe stronger the updraught the larger the final hailstone.\n\nIf you collect some hailstones after they have dropped and use a sharp knife to cleanly cut one in half, you might be able to see the individuals layers of ice within the hailstone through a magnifying glass or microscope.\n\nHailstones can become very very big - have alook at the guiness book of records - but I believe that you Americans hold the record for a hailstone that fell in Kansas, USA, and was measured at 43.18cm (17 in) long - unfortunately no idea of the weight.
1181166
Air is heated by the surface of the Earth on a Hot and sunny Day.  Hot air rises.  AS it rises it expands due to lowered atmospheric pressure.  As it expands it cools and begins to decend again.  Also if the air is moist as it cools it must release the moisture (rain -or hail if it is high and cold enough.)  This begins a circulation pattern up in the middle and down outside.  Often hail will begin to fall only to be caught in an updraft and carried aloft again.  This cycle continues until the hail is too heavy for the updrafts to lift it and it makes it to the ground.  This is why very strong thunderstoms with violent updrafts produce large hail.
657509
1. Blizzard\n2. Flash flood\n3. Typhoon\n4. Funnel cloud\n5. Tornado\n6. Monsoon
105363
For a tornatdo to form, there must be cold air, warm air, horizontally spiraling air (casued by the coriolis effect), flat land, no water present. There must be an oncoming wind, and cold and warm aiar that is colliding from the northern and souther latitudes. When the masses of air meet, the warm or moist air will rise, since its density is lower than cold or dry air, ando this will create an upward motion. Now, the oncoming wind will come along (it will be spiraling already), and when it makes contact with the area in which the air masses met, the spiraling wind will basically be violently set upright and so a tornado will form. In the northern hemisphere, the winds will go in a counterclockwise direction and in an inward spiral. (This will be partailly due to the Coriolis effect& if you're in the southern hemisphere, the winds will go in a clockise direction). This is the basic science of tornadoes, as i have just learned this year in my Earth Science course.
23977
It is possible but it is quite rare. Here's why.\n\nA thunderstorm depends on rapidly rising  moist warm  air to produce the effects we see. These effects are: large volumes of rain in a short period of time, strongly gusting winds, hail, and of course lightning. When conditions aren't right (surface air is too cool and dry) it is impossible for air at the surface to rise fast and high enough to create a thunderstorm cell. Basically in winter the air is not warm or moist enough to produce thunderstorm cells.\n\nFor a deeper explanation check the source site.
13372
According to answers.com\nhttp://www.answers.com/tornados%20\n\n"Tornadoes develop from severe thunderstorms, usually spawned from squall lines and supercell thunderstorms, though they sometimes happen as a result of a hurricane. They are believed to be produced when cool air overrides a layer of warm air, forcing the warm air to rise rapidly, though tornadoes over water (waterspouts) frequently are observed forming in the absence of convection or apparent strong surface temperature differences. Tornadoes, lightning, and sometimes hail are associated with thunderstorms. Many tornadoes appear at the tail end of mesocyclones. On weather radar screens, a characteristic "hook echo" marks the area where tornadoes are likely to exist."\n\nThe reference will give good idea for how do tornados form
33298
3 things r neede for cloud formation...cooling of air, presence of water vapour (relative humidity shud be close to 100%), and condensation nuclei( like dust particles).\ndunno who found it, sorry
793904
Raining, windy, cloudy, gorgeous day!\n\nYou too, Fireater!
419637
cloud formation occurs when water vapor condenses on particles in the atmosphere which causes a release of latent heat so i would venture a guess that it an exothermic reaction.
781475
Suggest you log on to "HAIL STORM CENTER" as there would be plenty of imfo there for you, Good luck!