High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

the initial source for evaporation. Condensation leads to higher wind speeds, as a
tiny fraction of the released energy is converted into mechanical energy; the faster
winds and lower pressure associated with them in turn cause increased surface
evaporation and thus even more condensation. Much of the released energy
drives updrafts that increase the height of the storm clouds, speeding up
condensation. This positive feedback loop continues for as long as conditions are
favorable for tropical cyclone development
CLASSIFICATION OF CYCLONIC STORMS
Any tropical cyclone that forms between longitude 45°E and 100°E in the Northern
Hemisphere is monitored by the India Meteorological Department (IMD), who run
the Regional Specialized Meteorological Center (RSMC) in New Delhi, India. Since
1998, RSMC New Delhi has used six different categories to measure the wind speed
of a tropical cyclone based on the maximum sustained winds over a 3-minute
averaging period. The classification of cyclones by RSMC is as follows;
CATEGORY SUSTAINED
Depression
WINDS
≤27 kts
≤51 km/h
T-SCALE
(INTENSI
TY)
0
DESCRIPTION
Depression is the lowest category that
RSMC New Delhi uses to designate tropical
systems, and systems designated as
depressions have wind speeds of under
27 kn (51 km/h, 31 mph).
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