2.9.2 Other features observed
The lowest observed pressure of 998.6 hPa was reported by Bajpe at 0000 UTC of 9th Oct., when the system was north to the Bajpe. The maximum observed mean wind speed was 20 kts reported by Buoy 23097(14.0/68.0), when the system was to the northwest of Buoy 23097 at 1200 UTC of 12th Oct. The system moved in northwest direction.
2.9.3 Weather and damage caused
No damage was reported by this system.
Isolated to scattered rainfall occurred over parts of Konkan & Goa and coastal Karnataka.
Chief amounts of 24 hrs. rainfall (1 cm or more) ending at 0300 UTC from 9th to 12th Oct. 2015 are given below:
9.10.2015
Konkan & Goa: 5-Dodamarg, 1-Pernem
Coastal Karnataka: 1- Mangaluru
10.10.2015
Coastal Karnataka: 3- Manchikere; 2- Mani; 1- Siddapura, Dharmasthala, Kumta, Shirali PTO
11.10.2015
Coastal Karnataka: 2- Puttur Hms, 1-Uppinangadi, Mani.
Konkan & Goa: 1- Mokhada – FMO, Ambernath.
12.10.2015
Konkan & Goa: 4- Matheran, Karjatagri, Bhiwandi; 3- Sudhagad Pali, Wada, Shahapur,
Pen; 2- Jawhar, Kalyan, Murbad; 1- Poladpur, Mokhada – FMO, Vikramgad, Khalapur, Sangameshwar.
2.10 Extremely Severe Cyclonic Storm 'CHAPALA' over Arabian Sea (28th Oct. –4th Nov. 2015)
2.10.1 A trough of low at mean sea level lay over southeast Arabian Sea and adjoining Laskhadweep area on 22nd, over southeast Arabian Sea and neighbourhood with a cyclonic circulation aloft extending upto 0.9 km a.s.l. on 23rd and over southeast and adjoining southwest Arabian Sea with the cyclonic circulation aloft extending upto 0.9 km a.s.l. on 24th & 25th. It organised into a low pressure area over the same region with an associated cyclonic circulation extending upto mid tropospheric levels on 26th. It lay as a well marked low pressure area over the same region with associated cyclonic circulation extending upto mid tropospheric levels on 27th. Then it concentrated into a Depression and lay over southeast Arabian Sea and adjoining areas of southwest & central Arabian Sea, centred near Lat. 11.5°N / Long. 65.0°E about 1200 kms southwest of Mumbai and 1320 kms southeast of Salalah (Oman) at 0300 UTC on 28th Oct. Moving north northwestwards, it intensified into a Deep Depression over east central and adjoining west central and south Arabian Sea and lay centred at 1200 UTC of 28th, near Lat. 12.5°N / Long. 64.7°E. It continued to move north-northwestwards and further intensified into a Cyclonic Storm, 'CHAPALA' and lay over eastcentral and adjoining westcentral and south Arabian Sea centered near Lat. 13.7°N / Long. 64.3°E, about 1080 kms southwest of Mumbai and about 1150 kms east-southeast of Salalah (Oman) at 0000 UTC on 29th. It then moved northwestwards and lay over eastcentral and adjoining westcentral and south Arabian Sea, centred near Lat. 13.8°N / Long. 64.2°E, about 1090 kms southwest of Mumbai and about 1140 kms east-southeast of Salalah (Oman) at 0300 UTC of 29th. It moved west-northwestwards and intensified into a Severe Cyclonic Storm and lay over west central and adjoining eastcentral Arabian sea at 0900 UTC on 29th October 2015 centered near Lat. 14.0°N / Long. 63.5°E. It further moved west-northwestwards and lay over west central and adjoining eastcentral Arabian sea at 1200 UTC on 29th October 2015 centered near Lat. 14.1°N / Long. 63.3°E, about 1150 kms west-southwest of Mumbai and about 1040 kms east-southeast of Salalah (Oman). It further intensified into a Very Severe Cyclonic Storm and lay over westcentral Arabian Sea centred near Lat. 14.3°N / Long. 62.5°E at 1800 UTC of 29th. Then it moved westwards and further intensified into an Extremely Severe Cyclonic Storm and lay over westcentral Arabian Sea, centred near Lat. 14.3°N / Long. 61.8°E at 0000 UTC on 30th. It further moved westwards and lay over westcentral Arabian Sea, centred near Lat. 14.3°N / Long. 61.5°E, about 1320 kms west-southwest of Mumbai and 850 kms east-southeast of Salalah (Oman) at 0300 UTC on 30th. It moved west-southwestwards and lay centred near Lat. 14.1°N / Long. 60.6°E about 1410 kms west-southwest of Mumbai and 770 kms east-southeast of Salalah (Oman) at 1200 UTC on 30th. It further moved west-southwestwards and lay centred near Lat. 13.8°N / Long. 59.2°E, about 1560 kms west-southwest of Mumbai and 650 kms southeast of Salalah (Oman) at 0300 UTC on 31st. It moved westwards and lay centered near Lat. 13.8°N / Long. 57.9°E, about 1690 kms west-southwest of Mumbai and 540 kms southeast of Salalah (Oman) at 1200 UTC on 31st Oct. It moved west-southwestwards and lays centered near Lat. 13.6°N / Long. 56.1°E, about 430 kms south-southeast of Salalah (Oman) , 740 kms east-southeast of Riyan (Yemen) and 260 kms east-northeast of Socotra Island (Yemen) at 0300 UTC on 1st Nov. It moved westwards and lay centered near Lat. 13.6°N / Long. 54.6°E, about 380 kms south- southeast of Salalah (Oman) , 590 kms east-southeast of Riyan (Yemen) and 130 kms north-northeast of Socotra Island (Yemen) at 1200 UTC on 1st. It moved west-southwestwards and lay centered near Lat. 13.2°N / Long. 52.2°E, about 470 kms south-southeast of Salalah (Oman) , 350 kms southeast of Riyan (Yemen) and 190 kms west-northwest of Socotra Island (Yemen) at 0300 UTC on 2nd. It moved west-northwestwards, weakened into a Very Severe Cyclonic Storm and lay over Gulf of Aden and adjoining westcentral Arabian Sea centered near Lat. 13.4°N / Long. 50.5°E, about 180 km southeast of Riyan (Yemen) and about 550 km southwest of Salalah (Oman) at 1200 UTC of 2nd. It furher moved west-northwestwards, crossed Yemen coast to the southwest of Riyan, near Lat. 14.1°N / Long. 48.6°E, during 0100-0200 UTC on 3rd November as a Very Severe Cyclonic Storm. It then continued to move west-northwestwards, weakened into a Severe Cyclonic Storm and lay over Yemen centred near Lat. 14.2°N / Long. 48.4°E about 100 km southwest of Riyan (Yemen) at 0300 UTC on 3rd. It moved west-northwestwards and weakened into a Cyclonic Storm and lay centered near Lat. 14.2°N / Long. 47.8°E about 100 kms east-southeast of Ataq (Yemen) at 0600 UTC on 3rd. It further moved westwards and lay centered near Lat. 14.2°N / Long. 47.3°E about 60 kms south-southeast of Ataq (Yemen) at 1200 UTC of 3rd. It then moved west-northwestwards, weakened into a Deep Depression and lay centred near Lat. 14.3°N / Long. 47.0°E, about 25 kms south-southeast of Ataq (Yemen) at 1800 UTC of 3rd. It further moved nortwestwards and weakened into a Depression and lay centred near Lat. 14.8°N / Long. 46.5°E about 50 kms northwest of Ataq (Yemen) at 0000 UTC on 4th Nov. It further weakened and lay as a well marked low pressure area over Yemen on 4th Nov.
The details of the system are given in Table 10.
Table–10
|
Date / Time (UTC)
|
Intensity
|
Position near
Lat. o N / Long. o E
(Real time)
|
Based on
|
Revised Estimates on Satellite Imagery /RADAR Obsn.
|
Supporting synoptic / asynoptic observations
|
28 Oct./ 03
|
Depression
|
11.5 / 65.0
|
T 1.5
|
Buoy 23910(12.2/69.2): 1010.0 hPa
Buoy 23668(13.9/61.8): 1010.6 hPa
Buoy 23451(15.0/68.9): 1012.3 hPa
Minicoy: 1011.9 hPa, 230/3kts
Amini Divi: 1011.4 hPa, VRB/1kts
|
28 Oct./ 1200
|
Deep Depression
|
12.5 / 64.7
|
T 2.0
|
Buoy 23668(13.5/61.5): 1007.9 hPa
Buoy 23451(15.0/68.5): 1010.0 hPa, 080/10kts
Buoy 23910(12.2/69.1): 1007.7 hPa
Ship DCCP2(7.3/54.3): 1009.0 hPa, 020/4kts
Ratnagiri: 1009.5 hPa, 270/2kts
Amini Divi: 1008.7 hPa
|
29 Oct./ 0000
|
Cyclonic storm
|
13.7 / 64.3
|
T 2.5
|
Buoy 23097(14.5/68.5): 1009.2 hPa, 140/12kts
Buoy 23910(12.2/69.1): 1008.7 hPa
Ship A8CB7(19.0/59.4): 1011.0 hPa, 080/19kts
Ship BATFR45(10.3/55.4): 1009.2 hPa, 120/20kts
Amini Divi: 1008.7 hPa
|
29 Oct./ 0300
|
Cyclonic storm
|
13.8 / 64.2
|
T 2.5
|
Buoy 23668(13.5/61.4): 1008.8 hPa
Buoy 23451(15.0/68.5): 1011.8 hPa, 110/8kts
Buoy 23097(14.5/68.5): 1011.5 hPa, 120/10kts
Ship BATFR45(10.6/56.1): 1010.3 hPa, 060/11kts
Syp Masirah: 1014.8hPa, 100/14kts
Hanimaadhoo: 1012.2hPa, VRB/1kts
|
29 Oct./ 0900
|
Severe Cyclonic storm
|
14.0 / 63.5
|
T 3.0
|
-
|
29 Oct./ 1200
|
Severe Cyclonic storm
|
14.1 / 63.3
|
T 3.5
|
Buoy 23668(13.7/61.6): 1004.9 hPa
Ship BATFR45(11.5/58.2): 1007.5 hPa, 350/10kts
Ship WDE8265(16.8/70.2): 1009.8 hPa, 180/2kts
Mashirah: 1012.9 hPa, 070/17kts
Ras Al Hadd: 1013.3 hPa, 060/8 kts
|
29 Oct./ 1800
|
Very Severe Cyclonic storm
|
14.3 / 62.5
|
T 4.0
|
Buoy 23097(14.8/68.8): 1011.6 hPa, 130/8kts
Ship BATFR45(12.0/59.4): 1008.9 hPa, 330/13kts
Ship TWWUK75(18.0/67.2): 1011.7 hPa, 070/22kts
Ship DIGW(18.7/71.9): 1011.0 hPa, 020/21kts
Mashirah: 1015.0 hPa, 070/14kts
|
30 Oct./ 0000
|
Extremely Severe Cyclonic storm
|
14.3 / 61.8
|
T 5.0
|
Buoy 23097(14.8/69.0): 1009.7 hPa, 120/4kts
Ship BATFR45(12.0/61.0): 1005.8 hPa, 270/16kts
Buoy 23910(12.0/69.3): 1008.7 hPa
Amini Divi: 1008.4 hPa, VRB/1kts
Mashirah: 1013.6 hPa, 070/16kts
|
30 Oct./ 0300
|
Extremely Severe Cyclonic storm
|
14.3 / 61.5
|
T 5.5
|
Buoy 23668(13.5/61.6): 1000.4 hPa
Ship BATFR45(12.0/61.7): 1007.5 hPa, 240/19kts
Ship ATSS(21.0/66.2): 1009.8 hPa, 180/2kts
Ship DIGW(18.7/71.9): 1001.3 hPa, 150/58kts
Mashirah: 1014.9 hPa, 080/19kts
|
30 Oct./ 1200
|
Extremely Severe Cyclonic storm
|
14.1 / 60.6
|
T 6.0
|
Buoy 23910(12.3/69.4): 1009.0 hPa
Ship BATFR45(12.5/63.9): 1008.2 hPa, 190/16kts
Ship CQCZ(15.3/54.3): 1010.3 hPa, 090/20kts
Mashirah: 1013.5 hPa, 080/20kts
Ras Al Hadd: 1014.3 hPa, 040/10kts
|
31 Oct./ 0300
|
Extremely Severe Cyclonic storm
|
13.8 / 59.2
|
T 5.5
|
Buoy 23910(12.3/69.4): 1011.0 hPa
Ship BATFR45(15.4/65.3): 1011.2 hPa, 110/13kts
Ship D5BU7(19.6/64.6): 1013.0 hPa, 060/14kts
Mashirah: 1014.6 hPa, 080/16kts
Ras Al Hadd: 1015.0 hPa, 060/11kts
|
31 Oct./ 1200
|
Extremely Severe Cyclonic storm
|
13.8 / 57.9
|
T 5.5
|
Ship BATFR45(17.4/65.6): 1009.7 hPa, 070/12kts
Buoy 23910(12.3/69.4): 1008.2 hPa
Mashirah: 1012.6 hPa, 080/16kts
Salalah: 1009.7 hPa, 070/12kts
Marmul: 1008.7 hPa, 070/15kts
|
1 Nov./ 0300
|
Extremely Severe Cyclonic storm
|
13.6/56.1
|
T 5.5
|
Ship BATFR45(19.8/60.0): 1010.6 hPa, 070/17kts
Buoy 23097(14.8/68.9): 1009.0 hPa, 090/8kts
Mashirah: 1013.2 hPa, 090/13kts
Salalah: 1010.1 hPa, 360/18kts
Marmul: 1011.0 hPa, 050/13kts
|
1 Nov./ 1200
|
Extremely Severe Cyclonic storm
|
13.6/54.6
|
T 5.5
|
Salalah: 1009.0 hPa, 170/8kts
Marmul: 1009.4 hPa, 100/15kts
Yalni: 1011.1 hPa, 090/13kts
Buoy 23451(15.0/68.9): 1009.3 hPa, 040/4kts
|
2 Nov./ 0300
|
Extremely Severe Cyclonic storm
|
13.2/52.2
|
T 5.0
|
Ship BATFR45(12.0/49.4): 1008.5 hPa, 310/12kts
Buoy 23451(15.0/68.9): 1012.2 hPa, 020/10kts
Salalah: 1012.6 hPa, 010/3kts
Marmul: 1013.2 hPa, 050/8kts
|
2 Nov./ 1200
|
Very Severe Cyclonic storm
|
13.4/50.5
|
T 4.5
|
Ship WMPP(12.2/50.2): 1002.5 hPa, 250/30kts
Ship BATFR45(12.0/51.0): 1003.5 hPa, 270/27kts
Mashirah: 1013.7 hPa, 090/13kts
Salalah: 1011.5 hPa, 140/12kts
Marmul: 1010.7 hPa, 120/14kts
|
3 Nov./ 0100-0200 UTC
|
It moved west-northwestwards, crossed Yemen coast to the southwest of Riyan, near Lat. 14.1°N / Long. 48.6°E, during 0100-0200 UTC on 3rd November as a Very Severe Cyclonic Storm.
|
3 Nov./ 0300
|
Severe Cyclonic storm
|
14.2/48.4
|
-
|
Ship SHIP(12.5/43.2): 1006.3 hPa, 270/15kts
Ship BATFR45(12.0/53.0): 1011.5 hPa, 170/13kts
Salalah: 1014.5 hPa, 010/4kts
|
3 Nov./ 0600
|
Cyclonic storm
|
14.2/47.8
|
-
|
Ship SHIP(12.2/44.6): 1008.9 hPa, 350/7kts
Ship BATFR19(11.0/53.6): 1013.4 hPa, 130/11kts
Ship WMPP(14.7/53.2): 1015.0 hPa, 100/15kts
Ship 9U8797(13.5/42.4): 1010.9 hPa, 280/10kts
Salalah: 1016.0 hPa, VRB/7kts
|
3 Nov./ 1200
|
Cyclonic storm
|
14.2/47.3
|
-
|
Ship DIXJ2(12.2/61.2): 1010.3 hPa, 040/12kts
Ship BATFR19(10.2/54.3): 1009.9 hPa, 110/14kts
Ship WMPP(15.6/53.5): 1012.7 hPa, 110/3kts
Marmul: 1010.9 hPa, 090/10kts
Gizan: 1005.2 hPa, 270/12kts
|
3 Nov./ 1800
|
Deep Depression
|
14.3/47.0
|
-
|
Ship A8PX5(12.1/45.0): 1011.2 hPa, 060/15kts
Ship BATFR19(9.4/55.0): 1013.2 hPa, 090/16kts
Ship VRGM8(17.2/56.5): 1016.1 hPa, 080/12kts
Salalah: 1015.7 hPa, 120/6kts
Gizan: 1009.2 hPa, 360/4kts
|
4 Nov./ 0000
|
Depression
|
14.8/46.5
|
-
|
Ship ONAR(20.5/38.6): 1008.0 hPa, 350/9kts
Ship BATFR19(8.2/53.2): 1011.2 hPa, 080/11kts
Marmul: 1013.6 hPa, 150/3kts
Salalah: 1013.8 hPa, 350/2kts
Gizan: 1007.2 hPa
|
4 Nov.
|
The system weakened and lay as a well marked low pressure area over Yemen on 4th Nov.
|
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