Saturday, November 23, 2013

Unusual rainfall in Bodinayakanur

It has been raining continuously  from mid night to 0700 hrs IST of date 23.11.2013.  IMD ARG at taluk office reported 117.0mm rainfall,  Flash floods in "Vanjathodai" was reported.. Human life loss and huts damage also reported.

  • The unusual rainfall at Bodinayakanur [Theni district] may be attributed to easterly wave propagation. 
  • Its influence is felt in NW parts of Tirunelveli district and Kanyakumari district too.
RT @rajugana: @weatherofindia Bangalore 2.20pm, It's pouring in S/East Bangalore...Sudden heavy downpour... 
RT @rajugana: Bangalore 1.55pm, Partially cloudy skies, slight drizzle in some parts of the city. sky picpic.twitter.com/9mS3NZSwwd

#Chennai - 2pm, WARM afternoon, with good signs of RAIN.
Moderate rain seen over Bay at 55km, E, N-E from city. May push in towards evening.

W.D have now reached Pakistan ... showers seen there and Kahmir is cloudy with scattered rain/snow expected in 24hrs http://ow.ly/i/3OrlG 
1:30pm, Showers seen near central, N Tamilnadu coast from Bay ... http://ow.ly/i/3OrlG

Today as well, showers expected for central, S Kerala, S tip Tamilnadu and W-ghats of Kerala and Tamilnadu, expected to continue till Monday
Scattered showers expected to push into N,central-coast, Interior Tamilnadu, #Chennai, S Andhra coast by evening/night last till 24-Nov.

#Helen vanished, "92W" has pushed into S-E corner of Bay

#Cyclone #Helen has dissipated by crossing only 10km inland ... (something like 100 to 0 in 12 secs) ... http://indianweatherman.blogspot.in/2013/11/helen-dissipated.html
11:30pm, Satellite IR shows "almost nothing left of #Helen along Andhra coast" ... http://ow.ly/i/3O8D5 

Some showers are expected to be along #Helen zone (central, N Andhra coast) during next 18hrs.
Meanwhile an Easterlies is expected to reach Tamilnadu, #Chennai coast by evening of Today, 23-Nov.
From evening of 23-Nov, scattered moderate rain expected ALL along S-E, central,N Taminadu coast and  #Chennai.
Showers along #Chennai, Coastal Tamilnadu is expected till Sunday evening, and the rain is expected to push into interior Tamilnadu.
More heavy T showers expected over S,central Kerala, S tip Tamilnadu and along W-ghats of Kerala, Tamilnadu during next 2 days.

Along #Chennai, at present the low level winds are from East, mid level from N, N-N-W and upper level is from W,S-W.
#Chennai - "Unstable wind directions at various levels of height can lead to unstable weather , Rain."
#Chennai - 12:40am, Showers now seen over N,N-W,W-N-W suburbs of city.
Rain may push into city in next 2 hrs or towards morning.


#Helen has vanished and "92W" has pushed into S-E corner of Bay... with pressure around 1004mb.. http://ow.ly/i/3O9TK 
Numeric models at present suggesting a N-W movement for "92W" intensifying into a Cyclone in next 3 days... 
For "92W", models suggest a central / N Andhra coast (or) Odisha coast on 29/30-Nov
If "92W" intensifies and moves N-W into central Bay... then DRY weather can be expected over MOST of #Tamilnadu from Monday.

Friday, November 22, 2013

Helen dissipated

Helen at last dissipated by crossing coast 12 km SSE of NARASAPUR at 16 Deg 19 Min North & 81 Deg 41 Min East between 1130 hrs IST to 1430 hrs IST


SN     PLACE                     TIME(IST)      LAT   LON   WIND            MSLP                       SLP DROP
01    MACHILIPATINAM     1130           16.1    81.1    315/15KT    1003.7 hPa               [-] 3.7hPa

02   KAKINADA                    1130          16.5     82.0    070/08KT    1009.6hPa               PLUS 1.7hPa

03 MACHILIPATINAM        1430            16.1    81.1    090/18KT    1003.8hPa              [-] 0.7 hPa

04 KAKINADA                     1430             16.5    82.0    110/05KT    1008.1hPa             PLUS 4.0hPa

  • As it entered cold water near coast no vertical development is seen. 
  • The cloud top temperature was only -17 Deg C
  • However lateral cloud formation in the relatively warm ocean current towards East was observed
  • Rapid dissipation while crossing occurred 
#Kolkata - 2:56pm, "Cloudy now over DumDum zone"

#Chennai - 3pm, HEAVY rain seen over zones S,S-W,S-E of Tambaram... and pushing South.

An upper level W.D trough is expected to give scattered rain/snow for Kashmir. And nothing much is expected from this system for other zones

Today, a fresh circulation has pushed into S-E corner Bay ... this is expected to intensify as well in next 2 days ! 

more details coming up

2:30pm, T showers has popped up "again" over S Kerala, S tip Tamilnadu.. these expected to continue tomorrow as well.
2:30pm, Satellite IR indicate, HEAVY rain along N Andhra coast ... and the remnant has not pushed inland ... http://ow.ly/i/3NLBc 

2pm, #Helen , Crossed and rapid dissipation observed and HEAVY rain ALL along central, N Andhra coast... http://ow.ly/i/3NKGV 

#Chennai - light rain, #Helen effect !

#Chennai - 1:37pm, Drizzle over Polichalur zone. Very localized light rain now. #Helen effect

BK_47771:07pm via Web
@weatherofindia drizzling started here in kilpauk chennai !

So, is #Helen coming to #Chennai? It's so cloudy here! @chennaiweather@weatherofindia

@weatherofindia @chennaiweather Light rain in vadapalani #chennai now...#CycloneHeleneffect?

Hey guys suddenly its raining at Tharamani#Chennai #Helen effect... ??? @chennaiweather @weatherofindia


Posted Friday Morning @11.30 am IST:

As per detailed Sat Imagery and estimate of system centre, as on 05Z/22,  it could be put to conclusion that the centre of the severe cyclone Helen, has crossed the coast of Andhra Pradesh (India) near 16.2N and 81.4E, near the town of Narsapur 16.2N and 81.4E). As the system weakened slightly prior to touching coast, prevailing winds are strong at 55 knts ,and pressure maintained at 990 mb. Absence of high rising clouds prevalent, as cloud top temperatures are lower at centre is -16c.

Very heavy rains now likely on Friday in Central and Northern coastal AP..upto 150-175 mms next 24 hrs. As clouds will spread, Andhra Pradesh will get good precipitation in the interiors ranging from 30-100 mms. Hyderabad will get heavy showers from Friday.

Rains spread to Southern Maharashtra and N.I.Karnataka on saturday.
Cloud bands will stretch to the NE and cover Odisha and Kolkata.

Another Low forms in the Southern Bay on Friday evening, around the 10N 95E region. Initially, parameters show the system (BB-20) heading WNW towards Southern Andaman Islands.
If the system remains South of 12/13N till the 86E region, there is a chance of it turning WSW (towards Chennai). If it moves above 12/13N, and comes west of 86E, it  would move NW then.

Meanwhile, the WD over UAE/Oman is moving East into Pakistan. Northern and Central Pakistan can get rain from Friday thru Sunday. Heavy rains expected in the North.
Cities in Sindh like Hyderabad, Nawabshah and Sukkar can also expect showers. Karachi will be partly cloudy with light showers expected on Saturday.
WD in India will be restricted to the Northern hilly states.

www.vagaries.in

Helen - making landfall near Machilipatnam now

RT @gbhimani: Landed in Vizag. Tough to think of even playing football here at the moment. #helen http://t.co/B6Qot4QbGV (9:43am)

10am, Cyclone Helen, Almost crossing into Machilipatnam coast ... http://ow.ly/i/3NFL7 
Helen, Weakened now with pressure around 992mb, and winds gusting to 100 kmph.

9:30am, Satellite visible shot of Cyclone HELEN ... http://ow.ly/i/3NFOi