329 thoughts on “Chennai under severe heat wave

  1. Chennai 42 C days
    ——————-

    2012 – above 42C – 6 days
    2008 – above 42C – 4 days
    2007 – above 42C – 4 days
    2013 – above 42C – 3 days so far

  2. First heavy Pre-monsoon rains in Kerala

    in mm (min 10 mm) ending 8.30 am on 26.05.2013

    Quilandy – 138
    Vadakara – 136
    Alappuzha – 100
    Kochi AP – 83
    Kumarakom – 76
    Mattanur – 55
    Mancompu – 53
    Konni – 50
    Vadakkancherry – 47
    Kozhikode – 46
    Mannarkad – 43
    Irikkur – 38
    Kakkkanadu – 38
    Kodungallur – 34
    Chengannur – 33
    Kanjirapuzha – 31
    Anakayam – 31
    Kottarakkara – 26
    Karipur – 24
    Kayamkulam – 23
    Thalasserry – 19
    Kanjirappally – 19
    Ponnani – 17
    Aryankavu – 17
    Piravom – 17
    Mavelikkara – 16
    Kottayam – 15
    Angadippuram – 14
    Thodupuzha – 13
    Pookot – 13
    Manjeri – 13
    Aluva – 11
    Perumbavur – 11
    Ottappalam – 10
    Tavanur – 10
    Punalur – 10
    Nedumangad – 10
    Chalakudy – 10
    Perinthalmanna – 10
    Haripad – 10

  3. 94b shows increase in the intensity of thunderstorms but it lacks overall organization. Convection are heavy particularly in the southern quadrant of the system.The system is slowly moving into the inner rim of upper anticyclone which would provide low shear and great outflow as the high pressure is located at the top of the system.Increase in the intensity of convection is an indication of system moving into better atmospheric conditions.Currently the shear is moderate around the system.Possibility of depression looks good.
    Some models are developing this system into a significant cyclonic storm.It can happen only if the movement of storm remains slow as expected by GFS as it could give some time for system to gain strength but if the system gains momentum then it would be difficult for it to gain significant intensity as it would push the system into land.

  4. The disturbance in Arabian sea is moving towards Yemen.The convection remains weak around the system.Wind shear remains high around the system hindering development but there is a decreasing shear near the Yemen coast.
    Models are expecting development once it near the coast but the dry air from the Arabian peninsula would pose a great threat to this system so the chance is less.

  5. Yestrday was a close miss.. V had a chance to see the storm close by few kms west of n.chennai but it failed to move into later sucessive stages.. And ther was a mighty storm twrds south… Dnt knw wat all the places got covered by tat myty storm..

  6. Dear Pradeep/Ehsan- what are the chances of rain in Banglore today since Dharmapuri/Hosur is getting rains – the impact should be there also

    • Really ..from May1 onwards even in Erode, Bhavani ,Gobi area had received good rain.infact more than 100mm..As per past record,getting 100mm+ in this may month in this area would pave a way for good SW rain falling…let us see..how it would be

  7. Very Heavy Rainfall in North Tamil Nadu

    in mm ending 8.30 on 27.05.2013

    Chennai misses again

    Harur – 130
    Tozhudur – 130
    Dharamapuri – 90
    Dharmapuri PTO – 75
    Chengam – 70
    Barur – 60
    Arani – 59
    Polur โ€“ 50
    Ambur – 50
    Vaniaymbadi – 50
    Krishnagiri – 40
    Tirupattur – 40
    Tirupattur PTO – 39
    Kalavai – 35
    Kodampatti – 34
    Pennagaram – 30
    Alangayam – 30
    Uthangarai – 30
    Chengalpattu – 30
    Rayakottah – 30
    Kaveripakkam – 14
    Marakkanam – 22
    Tiruttani – 20
    Melalathur – 20
    Sathanur Dam – 20
    Marandahalli – 19
    Paiyur – 18
    Melmalayanur – 12
    Kalrayanhills – 11
    Ellapuram – 10
    Upper Bhavani – 10
    Pochampalli – 10
    Palacode – 10
    Gudiyatham – 10
    Penucondapuram – 10
    Tiruvannamalai -10
    Tirupuvanam -10
    Karaikudi – 10
    Tiruttani AWS – 9
    Cheyyar – 9
    Virinjipuram – 7
    Kallakurichi โ€“ 6
    Avalanche – 6
    Coonoor – 5
    Cheyyar AWS โ€“ 5

  8. Massive rains continue in Andaman & Nicobar Islands

    94 B is giving these islands plenty of precipitation

    in mm ending 8.30 am on 27.05.2013

    Hut Bay – 163.2
    Port Blair – 67.2
    Car Nicobar – 32.8
    Nancowry – 10.6
    Maya Bunder – 0
    Long Island – 0

  9. Chennai DWR is still unserviceable..really pathetic for Chennai area..till that time Sriharikota DWR can be shared to IMD…right..This is indigenously developed by ISRO..So security issue would be a real concern..Otherwise IMD should act fast and set right Chennai DWR. Till that time IMD also can share its Storm detection Radar images..

  10. Twin System – IMD RSMC Report Update
    ======================

    95 A (Oman) – Now a LPA according to IMD
    ——————————
    A LOW PRESSURE AREA LIES OVER WEST CENTRAL ARABIAN SEA OFF OMAN COAST, IT WOULD MOVE NORTHWESTWARDS DURING NEXT 48 HOURS.

    94 B (West Bengal) – Still a UAC will become LPA in next 48 hours
    ————————————
    THE UPPER AIR CYCLONIC CIRCULATION OVER WEST CENTRAL AND ADJOINING NORTHWEST BAY OF BENGAL OFF ODISSA COAST EXTENDING UP TO MID-TROPOSPHERIC LEVELS PERSISTS. UNDER ITS INFLUENCE A LOW PRESSURE AREA WOULD FORM OVER NORTH BAY OF BENGAL DURING NEXT 48 HOURS.

    http://www.imd.gov.in/section/nhac/dynamic/rsmc.pdf

  11. The low pressure over north bay still lacks organization due shear coming from northeast .It would develop into a monsoon depression providing very heavy rain for the indian coast.

  12. Selvan, That’s always the case of these SWM low pressure.The shear will be persistent over the bay allowing the system to reach only a minimal intensity storm but it can produce huge rainfall amount.

  13. vinodth – I think it will be more than a normal monsoon depression. I dont know whether it will gain to named cyclone or not. But good chance of intensification once the WD pushes the LPA more into the sea

    95A INVEST
    โ€”โ€”โ€”โ€“
    Winds โ€“ 15kts-
    MSLP โ€“ 1010mb
    Location โ€“ 18.2 N 60.2 E
    Satellite Image โ€“ http://www.nrlmry.navy.mil/htdocs_dyn_apache/PUBLIC/tc_pages/thumbs/medium/tc13/IO/95A.INVEST/vis/geo/1km_zoom/20130527.0600.meteo7.x.vis1km_high.95AINVEST.15kts-1010mb-182N-602E.100pc.jpg

    94B INVEST
    โ€”โ€”โ€”โ€”-
    Winds โ€“ 15kts
    MSLP โ€“ 1010mb
    Location โ€“ 19.6 N 89.8E
    Satellite Image โ€“ http://www.nrlmry.navy.mil/htdocs_dyn_apache/PUBLIC/tc_pages/thumbs/medium/tc13/IO/94B.INVEST/vis/geo/1km_zoom/20130527.0632.mtsat1r.x.vis1km_high.94BINVEST.15kts-1010mb-196N-898E.100pc.jpg

  14. Chennai forecast:Mostly cloudy with a chance of a thunderstorm and rain, then thunderstorms after midnight. Low of 28C with a heat index of 35C. Windy. Winds from the SSW at 20 to 35 km/h shifting to the WNW after midnight. Chance of rain 70%.

      • The temperature is already down by 7C when compared to yesterday. and there is a possibility of TS today

      • Vinodth,

        agreed. But the WD has a huge impact on the bay system, see the models mslp, the through of WD pushing the system away from orissa to West Bengal / Bangladesh Coast

      • TS will be for a day or two and after that heat wave may continue.. The System in North East BOB will move towards NE and will remain constant for a week.. Heavy to very heavy rainfall can be expected NE, Chittagong and Myanmar.

  15. Kea./Pradeep..Temp reading is still 40.2ยฐC and remains constant for more than 4 hrs…Is something wrong?

  16. IMD’s rainfall statistics in cm..

    Harur (Dharmapuri Dist), Tozhudur (Cuddalore Dist) 13 each, Dharamapuri (Dharmapuri Dist) 9, Dharmapuri pto (Dharmapuri Dist), Chengam (Tiruvannamalai Dist) 7 each, Arani (Tiruvannamalai Dist), Barur (Krishnagiri Dist) 6 each, Polur (Tiruvannamalai Dist), Ambur (Vellore Dist), Vaniaymbadi (Vellore Dist) 5 each, Krishnagiri (Krishnagiri Dist), Tirupattur (Vellore Dist), Tirupathur pto (Vellore Dist) 4 each, Kalavai AWS (Vellore Dist), Rayakottah (Krishnagiri Dist), Uthangarai (Krishnagiri Dist), Alangayam (Vellore Dist), Chengalpattu (Kancheepuram Dist) 3 each, Tiruttani (Tiruvallur Dist), Melalathur (Vellore Dist), Marandahalli (Dharmapuri Dist), Paiyur AWS (Krishnagiri Dist), Sathanur Dam (Tiruvannamalai Dist) 2 each, Pochampalli (Krishnagiri Dist), Palacode (Dharmapuri Dist), Gudiyatham (Vellore Dist), Penucondapuram (Krishnagiri Dist), Tiruvannamalai (Tiruvannamalai Dist), Tirupuvanam (Sivaganga Dist), Karaikudi (Sivaganga Dist) 1 each.

  17. I don’t think that we would have 40+ days either this week or the week after. Mercury will continue to hover steadily around 38-39 degrees for the next few weeks. Only some good Tstorms can prevent the mercury from soaring again.

  18. Moderate showers can be expected at west coast.. The system in the Arabian sea is moving towards east due to strong wind blowing from south West. Bangalore will see more wet days within a week time. Chennai may be lucky for a day or two this week and after that dry and heat wave to continue over chennai for next couple of weeks.

  19. thunderclouds around b’lore…thundercells are visible over ne and n and even towards nw….but cloud movement is w to e

  20. After onset of SWM over Kerala the onset and further progress in west coast would be delayed. Due to an LPA formation over West Central Arabian Sea in next 48 hours, near Oman Coast.

  21. 94 B will fizzle out. It wont even become a depression. Rajesh Kapadia๏ปฟ Sir you were spot on. However, the Arabian Sea system (95A) is not going without a fight. From 30th may its hovering near oman coast for nearly 3-4 days – on 1st June – http://www.tropicaltidbits.com/analysis/models/gfs/2013052712/gfs_mslp_wind_ind_40.png on 2nd June – http://www.tropicaltidbits.com/analysis/models/gfs/2013052712/gfs_mslp_wind_ind_46.png Will it have impact on monsoon ????

  22. Preliminary Rainfall in Tamil Nadu from tonight TS

    in mm

    Yercaud Agro – 94
    Yercaud AWS – 66
    Nangavalli – 28
    Madurai East – 26
    Perambalur – 25
    Krishnagiri – 23
    Thirumangalam – 19
    Alathur – 18
    Madurai west – 14
    Kadaiyampatty – 13
    Sholayar – 11
    Thirumayam – 11
    Pallipalayam – 9
    Nilakottai – 8
    Ooty – 8
    Yelagiri – 7
    Karur – 6
    Manalmedu – 6
    Sivagangai – 4
    Paiyur – 4
    Mecheri – 4
    Veppur – 4
    Aruppukottai – 4
    Kallakurichi – 3
    Kodampatti – 3
    Vadipatti – 3

  23. The low pressure in north bay lacks convection but spin is clearly visible.The shear has increased around the system inhibiting development of the system.No further development is possible until the shear lets down and is moving towards the land.
    The system in Arabian sea shows weak convective clouds and it lacks the spin that was visible yesterday.Dry air is close by the system.Shear is moderate around the system.Development is not possible as of now as its sucking some dry air and unfavorable shear.
    Some models are expecting the disturbance to persist for few days until the return of favorable conditions which causes intensification of system.It remains to be seen whether the expected scenario unfolds or not.

    Pradeep,The system can affect the SWM flow only if it develops into a pretty significant storm otherwise it will cause no harm and would start moving towards the west coast under the influence of SWM flow.

  24. Hi guys,sorry to divert the topic from onset of swm.
    But for those who watched yest IPL finals, did you notice commentary before the delivery of last but seventh ball when it the match was virtually over with Chennai in need of 43 runs from 7 balls, dinesh Karthik jumped out of joy and rohit sharma asked him to calm down. At this point, one of the Indian team’s former cricketer commented that “this is the difference between a Chennai guy and Mumbai guy”. Is it not a racist comment???

  25. SWM clouds are moving towards kerala.
    http://www.imd.gov.in/section/satmet/dynamic/insatsector-ir.htm

    IMD will announce it officially only if it satisfies these 3 criteria

    a)
    Rainfall
    If after 10th May, 60% of the available 14 stations enlisted*, viz. Minicoy,
    Amini,Thiruvananthapuram, Punalur, Kollam, Allapuzha, Kottayam,
    Kochi, Thrissur, Kozhikode, Thalassery,Kannur, Kasargode and
    Mangalore report rainfall of 2.5 mm or more for two consecutive days, the
    onset over Kerala be declared on the 2nd day, provided the following
    criteria are also in concurrence.
    b)
    Wind field
    Depth of westerlies should be maintained upto 600 hPa, in the box
    equator to Lat. 10ยบN and Long. 55ยบE to 80ยบE. The zonal wind speed over
    the area bounded by Lat. 5-10ยบN, Long. 70-80ยบE should be of the order of
    15 โ€“ 20 Kts. at 925 hPa. The source of data can be RSMC wind analysis/
    satellite derived winds.
    3.
    Outgoing Longwave Radiation (OLR)
    INSAT derived OLR value should be below 200 wm
    -2
    in the box confined
    by Lat. 5-10ยบN and Long. 70-75ยบE

  26. The low pressure over north bay has moved north now showing improved convective clouds in south but lacks organization of clouds.The system has moved north for past few hours and part of circulation interacting with the land.It will produce heavy rain to bangladesh,WB and orrisa.

  27. Intense monsoon thunderstorms are close to Kerala coast but flow yet to gain strength.The north bay system is enhancing the flow for the south west coast.
    The system over Arabian sea is interacting with the land and it remains a weak feature.

  28. Severe monsoon convection clouds seen of kerala/karnataka coast ,… Bay system played a big role in tis .. The flow tat was stagnant bcos of arb sea system has been offset by the system in bay…. Tis showers may b considered as pre-mon showers,but once the rain bcomes consistent with winds ,they wil announce it as swm… Now Almost 95% swm has set in…

  29. Very heavy rain expected right from orrisa coast to Myanmar.We are going to get some thunderstorms since bay system is showing organisation and it would again increase the SWM winds in bay and for western coast.

  30. Rainfall in Tamil Nadu ending 8.30 am on 28.05.2013

    in mm (min 5 mm)

    Yercaud Agro โ€“ 94
    Yercaud AWS โ€“ 67
    Dharmapuri PTO – 63
    Dharamapuri – 60
    Yercaud – 60
    Krishnagiri Dam – 55
    Marandahalli – 38
    Rayakottah – 38
    Thiagadurgam – 35
    Tiruppattur (S) – 34
    Krishnagiri – 30
    Sholavandan – 30
    Padalur – 30
    Nangavalli โ€“ 28
    Madurai East โ€“ 26
    Perambalur AWS – 25
    Kalrayanhills – 25
    Melmalayanur – 24
    Thanthoni – 20
    Perambalur – 20
    Chittampatti – 20
    Tiruchengode – 20
    Karur โ€“ 20
    Thirumangalam โ€“ 19
    Alathur โ€“ 18
    Rishivandiam – 17
    Sathanur Dam – 15
    Madurai west โ€“ 14
    Sendurai – 13
    Kadaiyampatty โ€“ 13
    Kalayarkoil – 13
    Thirumayam โ€“ 11
    Sholayar โ€“ 11
    T.Palur – 11
    Paiyur – 10
    Upper Bhavani – 10
    Vadipatti – 10
    Needamangalam – 10
    Naduvattam – 10
    Barur – 10
    Kodavasal – 10
    Penucondapuram – 10
    Valangaiman – 10
    Lalgudi – 10
    Pandavaiyar – 10
    Madurai south – 10
    Komarapalayam – 10
    Devala – 10
    Ketti – 10
    Palacode – 10
    Pochampalli – 10
    Chengam – 10
    Pallipalayam โ€“ 9
    Ooty AWS โ€“ 8
    Jayankondam – 8
    Nilakottai โ€“ 8
    Yelagiri โ€“ 7
    Kattumannarkoil – 6
    Sakkottai – 6
    Avalanche – 6
    Manalmedu โ€“ 6

  31. Breaking News: IMD announcement on the Twin System

    SS good news for you

    94 B – Its an LPA now will concentrate into Depression.
    ——————
    THE UPPER AIR CYCLONIC CIRCULATION OVER NORTHWEST BAY OF BENGAL OFF WEST BENGAL-ODISHA COASTS EXTENDING UPTO MID-TROPOSPHERIC LEVELS. UNDER, ITS INFLUENCE A LOW PRESSURE AREA HAS FORMED OVER NORTH BAY OF BENGAL AND NEIGHBOURHOOD. IT IS LIKELY TO CONCENTRATE INTO A DEPRESSION DURING NEXT 24 HOURS.

    95 A – Still LPA
    ————-
    THE LOW PRESSURE AREA OVER WESTCENTRAL ARABIAN SEA OFF OMAN COAST PERSISTS. IT WOULD MOVE NORTHWEST WARDS DURING NEXT 24 HOURS.

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