cyclonic storms
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MAUSAM ◽  
2022 ◽  
Vol 53 (2) ◽  
pp. 215-224
Author(s):  
R. SURESH ◽  
S. RENGARAJAN

The tracks of three cyclonic storms over Bay of Bengal and one over Arabian Sea during 1998 have been analysed using the TOVS data  received at Chennai from NOAA satellites. Midtropospheric warmness between 700 and 400 hPa levels which protrudes about 300 to 700 km ahead of the storm acts as precursor to foreshadow the storm movement and predict the landfall about 6 to 24 hrs in advance. This technique has successfully predicted even the peculiar southward movement of Bay storm (28 November  to 7 December, 1996).


MAUSAM ◽  
2022 ◽  
Vol 53 (2) ◽  
pp. 187-196
Author(s):  
P. K. NANDANKAR ◽  
G. SRINIVASAN ◽  
Z. G. MUJAWAR

Temporal distributions of wind and wave over Bombay High Area (BHA) during cyclone period have been studied. Ten years’ (1990-99) data of BHA during cyclone period have been used. It is found that under the influence of cyclonic storms strong southwesterly winds prevail over the BHA in pre-monsoon and weaker east to southeasterly winds during post-monsoon. Southwesterly wave with heights exceeding 20 feet are encountered in BHA during pre-monsoon and south easterlies with wave height reaching up to 12 feet in post monsoon. Analysis of situations with different storm locations also yielded similar results. Relationships between wind speeds and wave height as well as the distance of the storm centre over BHA have been established.


MAUSAM ◽  
2022 ◽  
Vol 52 (4) ◽  
pp. 655-658
Author(s):  
O. P. SINGH

Long term trends in the frequencies of cyclonic disturbances (i.e. depressions and cyclonic storms) and the cyclonic storms forming over the Bay of Bengal and the Arabian Sea during the southwest monsoon season (June-September) have been studied utilizing 110 years data from 1890-1999. There have been significant decreasing trends in both the frequencies but the frequency of cyclonic disturbances has diminished at a faster rate. The trend analysis shows that the frequency of cyclonic disturbances has decreased at the rate of about six to seven disturbances per hundred years in the monsoon season. The frequency of cyclonic storms of monsoon season .has decreased at the rate of , one to two cyclones per hundred years.


Author(s):  
Kuvar Satya Singh ◽  
Ambily Thankachan ◽  
K. Thatiparthi ◽  
M. S. Reshma ◽  
Jiya Albert ◽  
...  

MAUSAM ◽  
2022 ◽  
Vol 45 (1) ◽  
pp. 7-16
Author(s):  
G. S. GANESAN ◽  
A. MUTHUCHAMI ◽  
E. R. SUKUMAR

Us ~n ~ Poisson distribution the probabil.ity of cyclonic storms crossing each latitude stripon the cast coast of India In a month In a random to-year period l'i com puted and presented in the raper. v ariouscharacteristics of the cyclonic systems such as average speed of movement s, average life spa n and the averagedistan ce travelled alon gwith the coefficient s uf variation before and after crossing the coast are examined anddiscussed here.


MAUSAM ◽  
2022 ◽  
Vol 44 (2) ◽  
pp. 153-162
Author(s):  
C. POORNACHANDRA RAO ◽  
P.V. Rama RAO

Using data of 84 Years, the influence of depressions and cyclonic storms on the rainfall over Eastern Ghats in Andhra Pradesh is studied. The portions of the Ghats, which receive heavy rains due to a depression or cyclonic storm are identified and the rainfall distribution in corresponding months is studied.    The results show that the depressions/cyclonic storms crossing not only the coastal parts of AndhraPradesh but also those of south Orissa north and TamilNadu can cause heavy rain over the Ghats in Andhra Pradesh.


MAUSAM ◽  
2021 ◽  
Vol 43 (2) ◽  
pp. 212-214
Author(s):  
J. V. M. NAIDU ◽  
C. N. MURTHY ◽  
M. SHANKAR
Keyword(s):  

MAUSAM ◽  
2021 ◽  
Vol 52 (2) ◽  
pp. 424-427
Author(s):  
I. P. PATEL ◽  
G. KRISHNA KUMAR
Keyword(s):  

MAUSAM ◽  
2021 ◽  
Vol 51 (3) ◽  
pp. 225-230
Author(s):  
A. MUTHUCHAMI

Using 1891-1997 data of cyclonic storm positions an attempt is made to study probability of a storm located at about 500 kms in the Bay from the coast to strike or threaten a given station or a given state. It is found that probable location of formation of storms affecting Tamil Nadu coast is 9.3° N / 85.0° E in the month of October and November, for the storms affecting Andhra Pradesh is around 11.5° N/87. 0° E in May and October and for the storms affecting Orissa is 16. 0° N / 89. 5° E in May and October. The storms affecting West Bengal have their origin around 14.8° N / 88. 6° E in May and 17.0° N / 88. 8° E in October. It is also found that the track of a given storm during post monsoon months (October-December) depends on the track of the earlier storm formed in the same season over Bay. Mean direction of storm over the Bay of Bengal is estimated based on the mean direction of the storm formed earlier in the Bay by a regression equation.


MAUSAM ◽  
2021 ◽  
Vol 47 (4) ◽  
pp. 339-348
Author(s):  
M. AMIRUL HUSSAIN ◽  
NAHID SULTANA

Monsoonal rainfall plays an important role in the annual rainfall distribution over Bangladesh. It is generally believed that monsoon depressions and cyclonic storms significantly affect the rainfall distribution over Bangladesh during the monsoon months and their absence causes deficient rainfall during the individual monsoon months. This aspect has been examined by computing the average rainfall for 32 meteorological observatories of Bangladesh Meteorological Department during the period 1948.91 for those monsoon months which were free from depressions and cyclonic storms. It has been found that the absence of monsoon depressions and cyclonic storms is not the main factor which causes deficient rainfall and consequent drought conditions in the individual monsoon months over different stations of the country. All the stations in the country experienced normal rainfall conditions inspite of the absence of depressions and cyclonic storms in the monsoon season (June-September).  


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