Image credits : http://www.srh.noaa.gov/ & accuweather.com
Tropical Storm Erica .... Hurricane Hunters !
Posted on the 01 September 2015 by Sampathkumar Sampath
Dreaming
about being chased generally means that you are "being told by your
unconsciousness that you're avoiding an issue or a person," – being chased
by an unknown in darkness could scare most people !
In
India, we hear cyclone warnings ! – people are instructed not to venture into
sea and when it is apprehended to be severe, people are evacuated to safer
places. In advanced Countries, much more
happens aided by technology !!! - It is
not only dreams that chase or being chased - Storm chasing is broadly defined
as the pursuit of any severe weather condition, regardless of motive, which can
be curiosity, adventure, scientific investigation, or for news or media
coverage. While witnessing a tornado is the single
biggest objective for most chasers, many chase thunderstorms and delight in
viewing cumulonimbus and related cloudstructure, watching a barrage of hail and
lightning, and seeing what skyscapes unfold.
West Indies is a
region of the Caribbean Basin and North Atlantic Ocean consisting of many islands. Going by Worldatlas.com, the Caribbean, long
referred to as the West Indies, includes more than 7,000 islands; of those, 13
are independent island countries. Among them are the Lesser Antilles, much
smaller islands to the southeast, divided into two groups, the Leeward Islands and Windward
Islands.
NOAA [The National
Oceanic and Atmospheric Administration] is an American scientific agency within
the United States Department of Commerce focused on the conditions of the
oceans and the atmosphere. NOAA warns of dangerous weather, charts seas and
skies, guides the use and protection of ocean and coastal resources, and
conducts research to improve understanding and stewardship of the environment.
A tropical cyclone
is a rapidly rotating storm system characterized by a low-pressure center,
strong winds, and a spiral arrangement of thunderstorms that produce heavy
rain. Depending on its location and strength, a tropical cyclone is referred to
by names such as hurricane, tropical storm, cyclonic storm, tropical depression,
and simply cyclone. A tropical storm is
an organized system of strong thunderstorms with a defined surface circulation
and maximum sustained winds between 34 knots (63 km/h) and 64 knots (119 km/h).
At this point, the distinctive cyclonic shape starts to develop, although an
eye is not usually present. Government weather services first assign names to
systems that reach this intensity (thus the term named storm). Although
tropical storms are less intense than a hurricane they can produce significant
damage. A hurricane or typhoon is a
system with sustained winds of at least 34 metres per second (66 kn) or 74
miles per hour (119 km/h).
Tropical Storm
Erika continued its trek across Atlantic Ocean late Tuesday [25.8.15], the
National Hurricane Center said.As of 5 p.m. ET, the storm had winds of 40 mph
and was located 605 miles east of the Caribbean's Leeward Islands. It's moving
to the west at 20 mph.Erika would deliver needed rainfall to these islands,
many of which are in a drought, AccuWeather said.Though the exact track of Erika
remains uncertain, the storm is forecast to move across the Caribbean, then
become a Category 1 hurricane by the weekend as it spins near the
Bahamas.Tropical Storm Erika is currently centered just approximately 100 miles
east of the Lesser Antilles and is moving quickly westward at 17 mph. The first
direct impacts to land should be felt through the morning hours on Thursday
across the northernmost Leeward Islands. Antigua and Barbuda are the first two
islands in the path of Erika's relatively small concentration of tropical
storm-force winds.
Now to the more
phenomenal ‘hunting’- Hurricane Hunters are aircrews that fly into tropical
cyclones in the North Atlantic Ocean and North-eastern Pacific Ocean to gather
weather data. Currently, the U.S. units that fly these missions are the United
States Air Force Reserve's 53rd Weather Reconnaissance Squadron and the
National Oceanic and Atmospheric Administration's Hurricane Hunters; such
missions have also been flown by Navy units in Vermont and other Air Force and
NOAA units.
Five U.S. aircrews
have been lost during such missions since they started during World War II. Before
satellites were used to find storms, military aircraft flew routine weather
reconnaissance tracks to detect formation of tropical cyclones. Today,
satellites have revolutionized weather forecasters' ability to detect signs of
such cyclones before they form, yet they cannot determine the interior
barometric pressure of a hurricane nor provide accurate wind speed information
— data needed to accurately predict hurricane development and movement.The idea
of aircraft reconnaissance of hurricane storm trackers was put forth by Captain
W. L. Farnsworth of the Galveston Commercial Association in the early 1930s and
"storm patrol bill"was passed
both the United States Senate and United States House of Representatives in
1936.
NOAA besides their
fleet of aircrafts and specialized equipment have trained Meteorologistswho work as Flight Directors on NOAA's heavy aircraft
(hurricane hunters). AOC Flight Directors use a combination of aviation
training and meteorological expertise to assist NOAA scientists and customers
with both pre-flight planning and real-time mission decisions.
In their FAQ, NOAA
states that such flights do not fly over the top of hurricane. The top of a hurricane can be over 50,000
feet high, and aircrafts could never get up there (they can go up to 30,000
feet). Besides, the weather NOAA are interested in analysing at the bottom of the
storm, which will affect the coastline it hits. For this reason, they fly in as low as safely possible. This
altitude can be anywhere from 1,000 feet to 10,000 feet.
With regards – S.
Sampathkumar
27th Aug
2015.
Image credits : http://www.srh.noaa.gov/ & accuweather.com
Image credits : http://www.srh.noaa.gov/ & accuweather.com