Thursday, June 02, 2011

Thunderstorms in Mumbai on Thursday evening. Seemed heavy in certain areas, though stations measured 7 mms....substantial relief from heat....convective, so will last for a few hours ....see more.
RT @divia_gazinkar: Sme1 stop ths rain. goa ( 7:30pm)
It's raining in Goa as well (8pm)
IMD :: Southwest monsoon has been vigorous over Kerala and Tamilnadu...
RT @SudhaKanago: Ghanana ghanana....say welcome to the monsoons! They have arrived!!!!!!!!!

IMD :: Southwest monsoon has been vigorous over Kerala and Tamilnadu.

 Rainfall occurred at most places over Kerala, Rayalaseema and Lakshadweep, at many places over Tamil Nadu and Interior Karnataka and at a few places over Coastal Karnataka. Isolated rainfall occurred over Coastal Andhra Pradesh and Telangana.
      Kozhikode airport recorded an extremely heavy rainfall of 25 centimetres.
      The following stations recorded very heavy to heavy rainfall in centimetres:
      Devala (Nilgiris dt) 20, Kanjirapally (Kottayam dt) 19, Peermade (Idukki dt) 18, Ottapalem and Parambikulam (both Palakkad dt), Piravom (Ernakulam dt) and Kozha (Kottayam dt) 17 each, Manjeri (Malapuram dt) and Thodupuzha (Idukki dt) 16 each, Pattambi (Palakkad dt), Cherthala (Alapuzha dt) and Kumarakom (Kottayam dt) 15 each,    Vadakara (Kozhikode dt), Perinthalamanna (Malapuram dt), Vadakkancherry (Thrissur dt), Kottayam, Munnar (Idukki dt) and Chinna Kallar (Coimbatore dt) 14 each, Holagunda (Kurnool dt), Mannarkkad and Thrithala (both Palakkad dt), Enamackel (Thrissur dt), Aluva and Perumbavur (both Ernakulam dt) and Valparai 13 each, CIAL Kochi and Idukki 12 each, Thalasserry (Kannur dt), Kannur, Kozhikode, Angadipuram (Malapuram dt), Vaikom (Kottayam dt) and Gudalur Bazaar (Nilgiris dt) 11 each, Thrissur and Vellanikara 10 each, Kochi airport, Aryankavu (Kollam dt), Nedumangad (Thiruvananthapuram dt), Raichur, Kottur (Bellary dt), Pechiparai (Kanyakumari dt) and Ketti (Nilgiris dt) 9 each, Thaliparamba (Kannur dt), Ambalawayal (Wayanad dt), Irinjalakuda and Chalakudy (both Thrissur dt), Alapuzha, Chengannur (Alapuzha dt), Thiruvananthapuram, Varkala (Thiruvananthapuram dt), Poonamalle and Thamaraipakkam (both Thiruvallur dt) and Thuckalay (Kanyakumari dt) 8 each and Mantralayam (Kurnool dt) Darsi (Prakasam dt), Vythiri (Wayanad dt), Mancompu (Alapuzha dt), Thiruvananthapuram airport, Chincholi (Gulbarga dt), Chamrajnagar, Thozudhur (Cuddalore dt) and Sankarapuram (Villupuram dt) 7 each.
      The other chief amounts of rainfall recorded in centimetres are:
      Alur (Kurnool dt), Subramanya (Dakshina Kannada dt), Talikote (Bijapur dt), Idukkur (Kannur dt), Alathur (Palakkad dt), Punalur, Neyyatinkara (Tiruvananthapuram dt), Agathy airport, Kallakurichi (Villupuram dt), Kolachal (Kanyakumari dt), Denakanikottai (Krishnagiri dt) and Kundha Bridge (Nilgiris dt) 6 each, Makthal (Mahabubnagar dt), Chikodi and Hidkal Dam (both Belgaum dt), Alamatty (Bijapur dt), Sedam (Gulbarga dt), Channagiri (Davanagere dt), C. R. Patna (Hassan dt), Mavelikara (Alapuzha dt), Kollam, Kavaratti, Pallipattu (Thiruvallur dt), Shenkottai (Thirunelveli dt), Kuzhithurai and Nagerkoil (both Kanyakumari dt), Coimbatore, Pollachi (Coimbatore dt), Coonoor and Naduvattam (Nilgiris dt) 5 each, Cumbum (Prakasam dt), Bhongir (Nalgonda dt), Dhone (Kurnool dt), Chilamattur and Kanekal (both Ananthapur dt), Kerur (Bagalkote dt), Hukkeri (Belgaum dt), Gulbarga, Bandipura and Yelandur (both Chamrajnagar dt), Panchanhalli and Shivani (both Chikmagalur dt), Chittur (Palakkad dt), Kayamkulam and Haripad (both Alapuzha dt), Chemabrambakkam (Thiruvallur dt), Nanguneri (Tirunelveli dt), Boothapandy (Kanyakumari dt), Coimbatore airport and Thogamalai (Karur dt) 4 each, Karkala (Udupi dt), Hungund (Bagalkote dt), Jeewargi (Gulbarga dt), Bevoor and Tavaragere (both Koppal dt), Deodurg and Muski (both Raichur dt), Anekal (Bangalore Urban dt), Ajjampura and Yegati (both Chikmagalur dt), B. Durga (Chitradurga dt), Napoklu (Kodagu dt), Madhugiri, Pavgada and Tiptur (all Tumkur dt), Vinjamur (Nellore dt), Dharmavaram, Rayadurg and Hindupur (all Ananthapur dt), Ananthapur, Punganur and Venkatagiri Kota (both Chittoor dt), Jammalamadugu and Muddanur (both Cuddapah dt), Hosdurg (Kasargode dt), Minicoy, Sriperumpudhur (Kanchipuram dt), R. K. Pet (Thiruvallur dt), Tirukoilur (Villupuram dt), Radhapuram and Thenkasi (both Tirunelveli dt), Eraniel and Mylaudy (both Kanyakumari dt), Shoolagiri and Thali (both Krishnagiri dt), Mettupalayam and Sulur (both Coimbatore dt), Thalavadi (Erode dt) and Uthagamandalam 3 each,  Mulki (Dakshina Kannada dt), Kollur (Udupi dt), Mahalingapur (Bagalkote dt), Nargund (Gadag dt), Jalahalli and Sindhanoor (both Raichur dt), Narayanpur (Yadgir dt), Thondebhavi (Chikkaballapur dt), Kadur (Chikmagalur dt), Arkalgud and Nuggehalli (Hassan dt), Sarguru (Mysore dt), Sira (Tumkur dt), Kalwakurthy (Mahabubnagar dt), Chevella (Renga Reddy dt), Penukoda, Kalyandurga, Amarapuram and Madakasira (all Ananthapur dt), Thambalapalli and Kalakada (both Chittoor dt), Owk (Kurnool dt), Mananthavady (Wayanad dt), Poondi (Thiruvallur dt), Cheranmadevi and Sivagiri (both Tirunelveli dt), Palayamkottai, Kanyakumari, Arani  and Sathanur Dam (both Tiruvannamalai dt), Hosur and Rayakottai (both Krishnagiri dt), Avinashi and Udumalpet (both Tiruppur dt), Bhavanisagar and Sathayamangalam (both Erode dt), Periyanaickenpalayam (Coimbatore dt), Kothagiri (Nilgiris dt), Peraiyur (Madurai dt), Rajapalayam and Watrap (both Virudhunagar dt) 2 each and Panambur, Haliyal (uttara Kannada dt), Basavakalyan (Bidar dt), Devarahippargi and Muiddebihal (both Bijapur dt), Navalgund (Dharwad dt), Begur (Chamrajnagar dt), Hiriyur (Chitradurga dt), Ammathy and Virajpet (both Kodagu dt), Kolar, T. Narsipur (Mysore dt), Holalur (Shimoga dt), Tumkur, Podili (Prakasam dt), Vikarabad (Renga Reddy dt), Palamaner and Pakala (both Chittoor dt), Arogyavaram, Yemmiganur, Allagadda, Koilakuntla and Pathikonda (Kurnool dt), Pamidi (Ananthapur dt), Pulivendala (Cuddapah dt), Aminidivi, Anna University and DGP office (both Chennai dt), Kanchipuram, Tiruttani, Thiruvallur, Cholavaram (Thiruvallur dt), Papanasam (Thanjavur dt), Viralimalai (Pudukottai dt), Sankarankoil (Tirunelvei dt), Yercaud, Annur (Coimbatore dt), Tiruppur, Erode, Gobichettipalayam and Perundurai (both Erode dt), Panchapatti (Karur dt), Manaparai and Marungapuri (both Tiruchirapalli dt), Aruppukottai, Srivilliputtur (Virudhunagar dt) and Kodaikanal 1 each.

RT @MahekMody: In Mumbai you can judge how hard it is raining by the furthest building you can see.
RT @TulikaP: Woohhoo! Heavy Heavy rains in Mumbai @weatherofindia :) (7:05pm)
RT @bheemaupadhyaya: vry Heavy rain at hunsoor near mysore @weatherofindia 7pm
RT @Aditya_UG: Rains are here! Mumbai!
RT @Aditya_UG: And its raining proper in Mumbai. Loving the weather. Relief.
RT @kapoor099: Mumbai ki pehali barish(rain)...lo gift by nature...
RT @Shrenit10: @weatherofindia Thunderstorm in Mumbai right now. next 2 days thunderstorms r expected. Rain should get heavier by sunday.
RT @ssoloveme: And so it rains in mumbai :)
RT @mysti: And its raining! mumbai.
RT @_hemanshu_: @taprichai Come to Narimanpoint, it looks like heavy showers accompanied by thunderstorms.....phewwww mumbai
RT @RupaSubramanya: Raining in Mumbai!!!!! So excited. (6:51pm)
RT @shanpati: @weatherofindia Heavy downpour with massive winds here in Kolhapur. Welcome to the mansoon season! (6:40pm)
RT @bheemaupadhyaya: crossed mysore.Looks like monsoon is set. @weatherofindia (6:10pm) >> Not yet over Mysore zone
Heavy T.showers over entire S-W Coast of Maharastra ...
Heavy rainfall and Rainfall distributions ...
RT @jayaramk1983: @weatherofindia nice drizzling in pune until sometime ago. The sky is filled with clouds :) (4:29pm)

Potential Low pressure area, Arabian sea .."98A" .. Update #1

Present location :: 13.7 N and 70.1 E
Pressure :: 1010 mb
Wind speed :: 25 KmpH

Expected to move North and pull South West Monsoon winds along with it in another 2 days

Offshore trough-cyclonic whirl combo may catapult monsoon

The offshore trough from north Karnataka coast to Kerala coast persists today (Thursday) as does the upper air cyclonic circulation over southeast Arabian Sea off Kerala coast.
An India Meteorological Department (IMD) update said the northern limit of monsoon has not moved beyond the Kozhikode-Kodaikanal alignment where it got docked into by the initial monsoon pulse. But the offshore trough-upper air cyclonic circulation is a combination that weather-watchers are putting their money on in terms of its potential to commandeer monsoon flows further north along the west coast.
An IMD outlook until Saturday continued to assess conditions as favourable for further advance over more parts of Arabian Sea, remaining parts of Kerala, some more parts of Tamil Nadu, central and south Bay of Bengal and some parts of Karnataka.
Satellite pictures early this morning showed convective (rain-bearing) clouds standing tall over Lakshadweep, Karnataka, Kerala, Tamil Nadu, east central and south Arabian Sea, central and south Bay of Bengal and the Andaman Sea.
An IMD warning said isolated heavy to very heavy rainfall would occur over coastal Karnataka and Kerala. Heavy rainfall would also occur over Lakshadweep and the Andaman and Nicobar Islands until Sunday.
A short-term forecast spoke about the possibility of widespread rain or thundershowers unfolding over Kerala, coastal Karnataka, Lakshadweep and Andaman and Nicobar Islands. It would be fairly widespread over interior Karnataka and scattered over the rest of peninsular India.
In an apparent signal of monsoon propagating to the north, the IMD said that scattered rain or thundershowers may break out over Konkan and Goa and isolated over the rest of Maharashtra until Friday and increase thereafter.
An extended outlook until Tuesday said that rain or thundershowers would become widespread along the west coast.
Meanwhile in the north, an incoming western disturbance is expected to dictate weather over northwest India until tomorrow (Friday). An induced upper air cyclonic circulation over north Rajasthan lying over Punjab and adjoining Haryana would add to the potency of the weather system.
Satellite cloud imagery showed convective clouds rising over parts of southeast Jammu and Kashmir and Uttarakhand.
An IMD warning said isolated thunder squalls would screech their way across Punjab, Haryana, Rajasthan, Delhi and Uttar Pradesh.
A short-term outlook said that fairly widespread rain or thundershowers would break out over the western Himalayan region, Punjab, Haryana, Chandigarh, Delhi and west Uttar Pradesh and scattered over rest northwest India until tomorrow and isolated thereafter.
A fall in maximum temperatures by 3 to 4 deg Celsius is likely over northwest India during this period. Mainly dry weather has been forecast in an extended outlook valid until Tuesday. Meanwhile, the highest maximum temperature of 44.0 deg Celsius was recorded at Wardha and Chandrapur in Maharashtra yesterday (Wednesday).
Towards the east, isolated thunder squalls have been warned of over Bihar, West Bengal, Sikkim, the Northeastern States, Chhattisgarh, Jharkhand and Orissa until Saturday as the pre-monsoon prospered in the region.
A short-term outlook said fairly widespread rain or thundershowers would occur over the Northeastern States, West Bengal and Sikkim while being scattered over rest east India and isolated over central India.
An extended outlook valid until Tuesday said that fairly widespread rain or thundershowers would occur over the Northeastern States and adjoining east India. 

Heavy rainfall and Rainfall distributions

The beginning of this SWM 2011 is really promising. Strong monsoonal winds are felt aloft. Astonishingly Tamilnadu too is realizing more than normal rainfall in the far EASTERN regions too. The recent developments [98A] in the Arabian sea may push the monsoon further north.
As pointed out by Rajesh, most of the heavy rainfall regions in India is not considered by IMD. Because IMD may not be having normals for that stations or if district normal is considered,then in computation of this normal, all heavy rainfall stations may not be considered. In Tamilnadu hilly stations like [1] upper Kothaiyar [2] Kuthuraivetti {Uthu} [3] Alwarkurichi peak [4] Polankudiyeruppu [5] Catchment area of river Periyar over Sivagiri Hills [6] upper Nirar (China Kallar) [7] Sholayar Dam [8] Devala etc. are some of the very heavy rainfall stations.
The statistics, especially the district wise rainfall distribution may be correct if these heavy rainfall stations are omitted. But these heavy rainfall regions are indicators of SWM rainfall.
Atleast Mr. Pradeep must come forward to analysis rainfall and distribution in these regions. Taluk wise rainfall distribution based on area weighted average will give clear picture.
Chennai - Today also can expect T.showers after 3 pm ... with strong S-W current.
COLA model still suggests that the UAC will strenghten over Konkan coast and Monsoon for Mumbai on 7-Jun.
Yesterday's UAC along kerala coast is now inland over N. Kerala and expected to move North all along west coast.
Afternoon T.showers forecast for N,N-W Tamilnadu till 5-Jun
Today, Vertical velocity is massiviely high over central, N-Tamilnadu and along Coastal Kerala, heavy rains ahead.
Chennai - 12:08pm, having a cloudy and Windy day so far with temp. at 34 deg C and High winds from South West
Flash Snippet !

Another Surprise development in addition to yesterday's:
98A forms in Arabian Sea. 13.7N and 70 E.
Expected to pull up SWM into coastal Karnataka. Could increase rainfall along Kerala. Karnataka , Goa and S.Konkan coastline next 24 hrs.
More updates as and when.
RT @rajugana: Baroda 10.45am, Yestday 39-29C. Now hot and sunny, with passing clouds. looking for first rain??
RT @bheemaupadhyaya: @weatherofindia @akshaydeoras Its still overcast over south Bangalore, no rains yet.. (10:50am)
Monsoon Ready to push into Coastal Karnataka. An UAC will descend to form a low off Goa by Saturday...More .