Flight Training - May 2015 - 53
THIS WEATHER map shows
a line of thunderstorms
stretching from the Upper Midwest
to the Gulf Coast, with a squall line
stretching south from St. Louis.
three-quarters of an inch in diameter,
damaging winds at least 58 mph, or producing at least one tornado.
STAY AWAY. If you hear about a "squall
line" during a preflight briefing or see
a weather chart, like the one of current
conditions in the chart above for the
region you're planning to fly across, your
SQUALL LINES in the United States most often
form east of an advancing cold front
and south of a warm front.
best bet would be to think about practicing takeoffs and landings at your home
airport that day.
The orange and red colors are strong
thunderstorms, while the other colors
represent weaker thunderstorms and
showers. The squall line stretches from
Illinois and Wisconsin south to the Gulf
of Mexico, with the strongest thunderstorms creating a pretty solid line from
around St. Louis to the Gulf.
In such a case, with a squall line
headed toward your airport, you should
plan to make the last landing of the day
in plenty of time to ensure the airplane is
securely tied down or in a sturdy hangar
before the squall line arrives.
MIND THE GAP. Signs in London's
Underground subway system say "Mind
the gap," telling riders to be careful of
the space between the cars and the platform as they board or leave trains.
A good slogan for a pilot facing a squall
line would be "Fear the gap" between
any two thunderstorms in the line. Even
if you're pretty sure the gap is at least 40
miles wide, which would keep you the
suggested 20 miles from each thunderstorm, you shouldn't even think about
trying to squeeze through a squall line.
Individual storms in a squall line are
always weakening and dying as new
thunderstorms form and grow. Those
puffy clouds below as you fly through a
gap could grow into a new thunderstorm
that catches your airplane in minutes.
WHERE SQUALL LINES FORM. Squall
lines form most often in the warm sector
of middle-latitude storm systems, south
of a warm front and to the east or southeast of an advancing cold front. While
the entire area south of the warm front
and east of the cold front is warm, additional warm, humid air moving in from
the south adds extra heat and humidity
to feed thunderstorms.
The dashed line on the diagram
represents an upper air trough, which
encourages warm, humid air to begin rising to trigger squall line thunderstorms.
As the squall line moves, generally
toward the southeast or east, some of
MAY 2015 FLIGHT TRAINING
/ 53
Flight Training - May 2015
Table of Contents for the Digital Edition of Flight Training - May 2015
Contents
Flight Training - May 2015 - Cover1
Flight Training - May 2015 - Cover2
Flight Training - May 2015 - Contents
Flight Training - May 2015 - 2
Flight Training - May 2015 - 3
Flight Training - May 2015 - 4
Flight Training - May 2015 - 5
Flight Training - May 2015 - 6
Flight Training - May 2015 - 7
Flight Training - May 2015 - 8
Flight Training - May 2015 - 9
Flight Training - May 2015 - 10
Flight Training - May 2015 - 11
Flight Training - May 2015 - 12
Flight Training - May 2015 - 13
Flight Training - May 2015 - 14
Flight Training - May 2015 - 15
Flight Training - May 2015 - 16
Flight Training - May 2015 - 17
Flight Training - May 2015 - 18
Flight Training - May 2015 - 19
Flight Training - May 2015 - 20
Flight Training - May 2015 - 21
Flight Training - May 2015 - 22
Flight Training - May 2015 - 23
Flight Training - May 2015 - 24
Flight Training - May 2015 - 25
Flight Training - May 2015 - 26
Flight Training - May 2015 - 27
Flight Training - May 2015 - 28
Flight Training - May 2015 - 29
Flight Training - May 2015 - 30
Flight Training - May 2015 - 31
Flight Training - May 2015 - 32
Flight Training - May 2015 - 33
Flight Training - May 2015 - 34
Flight Training - May 2015 - 35
Flight Training - May 2015 - 36
Flight Training - May 2015 - 37
Flight Training - May 2015 - 38
Flight Training - May 2015 - 39
Flight Training - May 2015 - 40
Flight Training - May 2015 - 41
Flight Training - May 2015 - 42
Flight Training - May 2015 - 43
Flight Training - May 2015 - 44
Flight Training - May 2015 - 45
Flight Training - May 2015 - 46
Flight Training - May 2015 - 47
Flight Training - May 2015 - 48
Flight Training - May 2015 - 49
Flight Training - May 2015 - 50
Flight Training - May 2015 - 51
Flight Training - May 2015 - 52
Flight Training - May 2015 - 53
Flight Training - May 2015 - 54
Flight Training - May 2015 - 55
Flight Training - May 2015 - 56
Flight Training - May 2015 - 57
Flight Training - May 2015 - 58
Flight Training - May 2015 - 59
Flight Training - May 2015 - 60
Flight Training - May 2015 - 61
Flight Training - May 2015 - 62
Flight Training - May 2015 - 63
Flight Training - May 2015 - 64
Flight Training - May 2015 - 65
Flight Training - May 2015 - 66
Flight Training - May 2015 - 67
Flight Training - May 2015 - 68
Flight Training - May 2015 - 69
Flight Training - May 2015 - 70
Flight Training - May 2015 - 71
Flight Training - May 2015 - 72
Flight Training - May 2015 - Cover3
Flight Training - May 2015 - Cover4
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