home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
QRZ! Ham Radio 1
/
QRZ Ham Radio Callsign Database - December 1993.iso
/
arrl
/
huricant.rck
< prev
next >
Wrap
Text File
|
1993-11-21
|
10KB
|
208 lines
HURRICANE DISASTER INFORMATION FILE
Tracking Hurricanes
Hurricane and tropical storm positions are given in terms of
latitude and longitude to the nearest one-tenth of a degree.
Latitude lines run across hurricane tracking charts (maps) from
left to right. longitude lines run from bottom to top. Latitude
gives the north-south position on the earth's surface, longitude
the east-west position. Therefore, by knowing the latitude and
longitude of a storm, we can locate it on a map. As an example,
try to locate 32.3 degrees north latitude and 64.8 degrees
longitude. You should be very close to the island of Bermuda.
A hurricane tracking chart appears in the January issue
Field Forum, and is suitable for reproduction. Larger (and
more sophisticated) charts are available from commercial sources.
For example, Kornor Enterprises sells heavy-duty plastic
laminated charts in various sizes. Erasable marker and
instructions are included. The company has agreed to sell the
charts to ARRL members at a special, reduced price: 17x22" --
$12.50; 11x15" -- $10.50; and 8.5x11" -- $8.50. (Includes
shipping/handling). Identify yourself as an ARRL member when
ordering. Order from Kornor Enterprises, PO Box 461, Cleveland,
OH 44094, American Express, VISA, and MasterCard credit cards
accepted. The KORNOR map is used by the staff at the National
Hurricane Center in Coral Gables, Florida.
On the KORNOR map, solid black lines are drawn for every
five (5) degrees of latitude and longitude. White lines are drawn
for every (1) degree. By definition, one degree of latitude is
equal to 60 nautical miles. This gives us a convenient way of
estimating distances on a chart. Measure the distance between any
two points, then lay this distance out on one of the north-south
longitude lines. Count the number of degrees of latitude and
multiply by 60 to find the distance in nautical miles. To convert
to statute miles, multiply that answer by 1.15. One nautical mile
equals 1.15 statute miles. One knot (nautical mile per hour)
equals 1.15 statute miles per hour.
Hurricane tracking software is also available.
During major activity, storm coordinates are provided in 3-
and 6-hour updates on NOAA weather radio services around the
country in the 160 MHz region. Modern 2-meter FM rigs with
extended receive capability cover NOAA broadcast frequencies.
HURRICANE NAMES FOR THE ATLANTIC
1991
Ana
Bob
Claudette
Danny
Elena
Fabian
Grace
Henri
Isabel
Juan
Kate
Larry
Mindy
Nicholas
Odette
Peter
Rose
Sam
Teresa
Victor
Wanda
Tropical Storm and Hurricane Terminology
TROPICAL DISTURBANCE: An area of showers and thunderstorms that
may have a slight cyclonic (counter-clockwise) surface
circulation and maintains its identity for at least 24 hours.
These are very common occurrences in the tropics.
TROPICAL DEPRESSION: A storm system displaying a noticeable
rotary circulation with maximum sustained wind speeds of 38 miles
per hour (33 knots).
TROPICAL STORM: Displays a substantial rotary circulation with
sustained winds of 39 to 73 miles per hour (34-63 knots). When
reaching tropical storm strength, a storm is given a name to aid
in tracking.
HURRICANE: Strong rotary circulation with sustained surface winds
of 74 miles per hour (64 knots) or more. In the western North
Pacific and most of the South Pacific, such storms are called
Typhoons. In the Indian Ocean they are called Cyclones.
Advisories, Watches and Warnings
SMALL CRAFT ADVISORY: Alerts boaters to wind or sea conditions
that might be hazardous to small boats. Usually wind speeds must
be at least 20 miles per hour (18 knots). Issued when a tropical
storm or hurricane moves within several hundred miles of the
coast. Boaters are advised to take precautions and not venture
into the open sea.
GALE WARNING: Coastal wind speeds between 39 and 54 miles per
hour (34-47 knots).
STORM WARNING: May be issued when winds of 55-73 miles per hour
(48-63 knots) are expected on area waters.
HURRICANE WATCH: Issued when there is a threat of hurricane
conditions developing within 24 to 36 hours.
HURRICANE WARNING: Hurricane conditions with winds of 74 miles
per hour or more (64 knots) and/or dangerously high tides and
waves are expected within 24 hours. People within the warning
area should begin to take action to protect life and property.
TORNADO/SEVERE THUNDERSTORM WATCH: Tornadoes and severe
thunderstorms often develop when hurricanes and tropical storms
make landfall. A watch means these storms are possible.
TORNADO/SEVERE THUNDERSTORM WARNING: Tornadoes or severe
thunderstorms are occurring within the warning area.
HURRICANE DISASTER-POTENTIAL
(Saffir/Simpson) Scale
CATEGORY PRESSURE WINDS SURGE DAMAGE
1 28.94" 74-95 MPH 4-5 ft Minimal. Primarily to trees,
foliage, and unanchored mobile
homes. No real damage to other
structures. Some small craft
may be torn from moorings.
2 28.50" 96-110 MPH 6-8 ft Moderate, some trees blown
down. Some window, door and
roofing damage. Small craft torn
from moorings in unprotected
anchorages. Some evacuation
of shoreline residences and low-
lying islands.
3 27.91" 111-130 MPH 9-12 ft Extensive. Large trees blown
down. Some structural damage
to small buildings. Mobile homes
destroyed. Serious coastal
flooding. Many small structures
near coast destroyed by wind
and waves. Almost all small
boats torn from moorings.
4 27.17" 131-155 MPH 13-18 ft Extreme. Extensive damage to
roofs on many small residences.
Terrain 10 feet or less above
sea level flooded. Escape routes
cut by rising water 3 to 5 hours
before center arrives. Massive
coastal evacuation required.
5 27.16" 156 MPH More Catastrophic. Complete failure
or less or more than of roofs on residences and
18 ft many commercial structures.
Small buildings overturned or
blown away. Massive evacuation
from low ground within 5-10
miles of the coast.
Operating Guidelines
1) Listen. Monitor recognized disaster net frequencies.
Transmit only when directed by a disaster net control station, or
station in the disaster area. Major nets include:
International Assistance and Traffic Net (IATN): 14.303 MHz
Hurricane Watch Net (HWN): 14.325 MHz
Friendly Caribus Connection: 14.283 MHz
2) Monitor W1AW for timely bulletins.
3) Hold off on health and welfare traffic.
Don't clog primary disaster frequencies by trying to
force H&W traffic into the disaster area. US amateurs' efforts
must be directed to receiving messages from the affected area,
each one having the potential of heading off numerous US-
originated messages. US amateurs must listen carefully for
instructions on handling H&W traffic.
4) Control of the communications situation belongs with
amateurs IN THE AFFECTED AREA. Act according to their directions
and those of designated net control stations.
5) It is the responsibility of the Red Cross to manage the
H&W traffic function (the Red Cross term is "Disaster Welfare
Inquiry"). We support the Red Cross communications network, not
the other way around.
Contact your local Red Cross chapters now to establish local
systems for handling H&W traffic.
*eof