WEATHER
TERMS TO KNOW
WATCH
- The conditions are favorable for severe weather to occur. Persons
in or close to the watch area should remain alert to threatening
weather conditions.
WARNING
- Severe weather has been sighted and/or indicated. Persons in
the warned area should take cover immediately and remain in a
safe place until the warning expires or is cancelled by the local
authorities.
A
TORNADO WATCH means that conditions are right
for a tornado to develop. You should listen to NOAA Weather Radio,
or to commercial radio and television stations for the latest
weather information. Keep informed! Keep an eye out for threatening
conditions and be prepared to go to a safe place.A
TORNADO
WARNING means that a tornado has been detected by radar
of seen by someone. If the tornado warning is for your area, then
you should go to a safe shelter immediately.
SEVERE
THUNDERSTORM - A thunderstorm producing winds of 58 miles
per hour or greater and/or 3/4 inch or larger hail. Thunderstorms
are also classified as severe if they produce tornadoes.
FUNNEL
CLOUD - A cloud, shaped like a funnel, extending from
the base of a thunderstorm, but not making contact with the ground.
Funnel clouds are associated with rotating columns of air. When
a funnel cloud makes contact with ground, it is re-classified
as a tornado.
TORNADO
- A violently rotating column of air contact with the ground.
Tornadoes are most often found in the Southwest quadrant of the
thunderstorm, especially supercells.
WALL
CLOUD - A local and often abrupt lowering of a rain-free
cloud base, usually situated in the Southwest portion of a storm
below an intense updraft. Wall clouds are often associated with
very strong or severe thunderstorms. Rotating wall clouds usually
develop before tornadoes or funnel cloud form, from a few minutes
up to possibly an hour. Wall clouds are often flat, low hanging
and dark. Sometimes, other low-hanging accessory clouds are mistakenly
identified as wall clouds.
Remember
. . . Tornadoes form quickly! You may only have a very few seconds
to find adequate shelter. When a tornado threatens, your immediate
action can save your life! Even taking precautions to move to your
designated safe palce during a Severe Thunderstorm Warning may save
vital seconds.