Severe Thunderstorm Watch is issued by National Weather Service. This means that_____________ are ___________ for a thunderstorm. Length is ________ hours.
Severe Thunderstorm Warning also issued By Local Weather Service. This means a severe storm has been spotted by doppler radar. It usually lasts for only ______ hour.
A sudden spark or energy ___________, caused when electric discharges _________between ________ of a cloud, _________ clouds, or _________ a cloud and the ground.
Properties of a Lightning:
_______________ of over 30,000C (much hotter than _______ surface).
Heated air ___________ ___________ and __________ making a sound of thunder.
Why do we see lightning before we hear thunder?
Because__________ travels much faster than __________.
Stay __________, away from doors and windows.
Avoid objects that __________ electricity, such as metal objects and bodies of water.
Do not seek shelter under the __________.
Do not use phones with ________.
Remember: _________ are pretty safe…
Is a rapidly __________, _________- shaped cloud that reaches down from a cloud to touch Earth’s surface.
Same system that produces ___________ can produce ____________.
Late in the day, when earth’s surface is very ________, __________(the flow of heat through a material, causing hot parts to rise and cooler parts to sink) can get very ________. This can lead to a _________.
Tornado Watch: Conditions are ___________ for a tornado to ________.
Tornado Warning: A tornado has ________.
Tornado Happenings: 1. When the updraft in a __________ cell is really strong, the air __________ in from all sides at high _________.
2. Air _______ into a _______. This lowers the ________ even more. Air rushes in even ______, and the pressure gets even ________, and so on.
3. As the tornado gets ___________, a funnel forms that can destroy anything in it’s path. The ________ of the tornado can reach speeds of 500 kilometers per hour (about 300 miles per hour) or more.
Tornadoes happen where _______, ________ air masses mix with _______, ________ air masses.
More tornadoes occur in the United States than in any other country, especially in the area known as TORNADO ALLEY. About ______ tornadoes every year in the United States.
Tornadoes Safety:The safest place to take a shelter in a storm _______ or the ___________ of a well-built building.
All year round, most precipitation begins in _______ as ________.