User blog comment:TheAlphatheOmega/Grath/@comment-12161342-20150219233343/@comment-12161342-20150220005738

Frission

''Something finally gives way...... one of the newborn jet streams is temporarily diverted farther north than usual by an eddy between two air masses, causing it to cut through the two conflicting air masses at a sharper-than-usual-angle. Up above the ice caps, the jet stream gathers cold, dry air into a massive cold front, which follows the stream path back down into the warm, moist airmass to the south. The cold front plows rapidly through the warm, saturated air as the jet stream's unusual track creates incredible amounts of wind shear and circulation. Couds begin to build along the front and associated dry line, rapidly growing from infantile cotton balls to tall, looming cumulonimbus cloud masses with tops spiking at over 50,000 feet. Lightning flickers within the dark blue, brooding walls of the thunderheads as they begin to organize into discrete, organized, massive supercell thunderstorms, each one showing up on doppler radar as massive evil splotches of color bigger than the combined radar image of a decently-sized battlefleet. The wind shear produced by the jet stream interacts with the supercells, turning each into giant, rotating, dark, anvil-shaped monstrosities laced with lightning. The supercells continue to strengthen as the front pushes deeper into the warm, moist air mass, even as the track of the storm front brings the TD's largest developing city right into the firing line of the most powerful supercell...''

Developing TD City

''TD personnel at work in the city begin to watch the developing supercell thunderstorm grow and move closer to the city. At first, many of them fail to take the storm seriously because the quiescent atmosphere of Frission, to this point, had not had any ability to spark any kinds of bad weather other than the occasional rain shower or snow flurry. However, those who were not fazed by the looming anvil structure and the flickers of internal lightning are jarred out of their complacency when a massive bolt of lightning flares out from the supercell and strikes an incomplete skyscraper with an incomprehensively loud CRAAACK-BOOM, showering people with red-hot debris. TD personnel begin to panic, rushing towards workstation radios and TVs in the hopes of getting some information as to what was going on and what to do.''

''The general chaos of the workers outside, uncontrolled as it may be, pales in comaprison to the frantic pandemonium within the city's weather center. Meteorologists run back and forth between instruments and displays, running into each other, shouting, and arguing with one another. They too were lulled into complacency by Frission's previously tame weather, and they are struggling to comprehend how such a situation could have developed so rapidly and unexpectedly. Even worse, they know that the city is unprepared for the calamaty about to strike, but they have no choice but to sound the warnings anyways in the hopes that at least some may be able to find shelter in time to survive.''

''Outside, every radio, PA system, and television channel is blanketed with an emergency announcement. A Tornado Warning is issued, and everyone is urged to seek shelter. However, it is too late, as leading edge of the fast moving supercell is already overhead. Lightning flares all around as rain falls and wind howls, but soon, all precipitation suddenly stops and the previously moderate winds shift course abruptly and spike in intensity. Those who look up see a sight that is evil and ominous: a huge portion of the cloud base has dropped lower than the surrounding layers, forming a fast-roating inverted mesa hanging below the clouds and heading towards the city. It is at this point that the city's alarm sirens, installed in case of an enemy fleet attacking, begin to wail a shrill, eerie cry; the siren control operators are doing their best to try and imitate the wailing moan of a typical tornado siren. Meanwhile, the inverted mesa, which few amongst the witnesses recognize as a wall cloud, begins to sprout numerous vorticies from its underside. The vorticies revolve around a central point and are soon surrounded by a larger funnel that encompasses and surrounds them. Together, the multivortex funnel cloud descends even as dust and debris begins to form a spiraling cloud on the ground underneath. A roar akin to the sound of one thousand freight trains thundering through a tunnel grows ever louder as the multivortex tornado touches down outside the city and rapidly moves in, growing wider and more powerful as it begins cutting its deadly path through the outskirts. Shooting lightning bolts from the funnel and cloud base, the monstrosity rapidly grows into a three-mile-wide multivortex twister encompassed by a large wedge structure with a massive cloud of debris from destroyed constructions orbiting it like deadly, perverse moons. Making its way through the center of the developing city, it tears down skyscrapers like they are made from mega-bloks. A large chunk of debris impacts the largest building roughly in the middle, sending the top collapsing sideways. However, the tornado winds catch the top of the skyscraper before it hits the ground and throws the entire intact portion of skyscraper several hundred meters, where it smashes down and knocks down other buildings like bowling pins. The tornado slices through the city like a three-mile-wide vaccuum cleaner, erasing every trace of civilization in its path, even going so far as ripping up pavement from the streets. As the tornado moves off and out of the city, the scene quiets down and survivors from outside the path of the tornado look at the damage. The city has literally been split in two, with even the roads being erased and gouges carved in the soil and rock itself from the multiple subvorticies within the wedge. In the distance, as the looming wedge finally begins to weaken, turn into a thin rope, and dissipate, the wreckage of the weather station is surveyed. Being on the very fringes of the destruction path, the ruined building's instruments have all ben wiped out. Data from the anemometers, which were specifically designed to withstand the violent winds of a tornado, reveal a shocking readout: before the anemometers were destroyed by the tornado's winds, windspeeds of up to 500mph were recorded on the fringes of the funnel. No data survived from within the funnel, however, leaving survivors to guess at the true intensity of the supertornado that just paid them a visit.''