CU-Boulder ATOC 1050 - ATOChw#14 (2 pages)

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ATOChw#14



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ATOChw#14

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Pages:
2
School:
University of Colorado at Boulder
Course:
Atoc 1050 - Weather and the Atmosphere
Weather and the Atmosphere Documents

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The region of the US that has the largest of tornadoes is the Great Plains Oklahoma is the state in which the largest of violent tornadoes occur Tornado Alley is located from TX to Indiana because this region aligns approximately with the typical orientation of strong cold fronts or dry lines as they move across the central US and this region aligns with the typical orientation of the jet stream during supercell outbreaks Tornadoes are most common around 5 pm The approximate mean path length of an EF5 tornado is 35 miles Majority of tornadoes move SW to NE F5 tornadoes occur rarely but stay on the ground the longest and cause the most fatalities The most likely time to observe tornado would be between 5 and 6 pm during the month of May Weak tornadoes F0 and F1 are more common then stronger tornadoes F5 and F6 since the conditions to produce these weak tornadoes are often found in supercells Tornadoes are common in the US because of its unique geography including the Rockies to the W which help cyclones form the Gulf of Mexico which provides moisture and the plains of central Canada where cold air originates An EF1 tornado would be weak whereas an EF5 tornado would be devastating Prior to the widespread use of Dopplar radar the only way to identify a possible tornado with radar to observe a hook echo in the radar echo You would be able to identify the mesocycle signature associated with a tornadic super cell with Radar radical velocity Most lightning strikes occur over land On the order of 100 lighting strikes occur each second on Earth Lightning frequency in the US decreases east to west The greatest lighting flash density in the US occurs across central Florida Florida has the highest of annual lighting related fatalities 15 of lighting strike victims are killed Lighting strike can heat the air it travels thru to 30 000C 54 000F Lighting bolts are typically 5km 3mi Diameter of lighting is typically 2 to 3 cm Voltage is the strength of an attractive force of



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