Saturday, April 30, 2011


The vertical wind profile in an unorganised and sheared summer TS will be chaotic and some times may bring severe catastrophe. Similar pattern of un organised wind shear [i.e un organised shear with height in speed and direction] is evident in the east coast, central India and west coast too. it may be inferred from the DWR wind, the pre monsoon TS activity at places will be violent [microburst]
From 1-May.. the Heat wave from N-W India will push into E.central India and into S-E Peninsula.. will reach Chennai after 3-May
COLA model suggests that the present S. Bay Low will move North and then N-E and NO real threat of Cyclone predicted ..
On 29-Apr, Entire N-W and Central India was around 40 to 42 deg C ...
30-Apr, Early hour T. shower that disrupted the Train services ... Pullambadi (Tiruchirapalli dt) 4 cm
South India heat on 29-Apr.. Nizamabad recorded the highest maximum temperature of 43 deg C
4:30pm, Heavy showers over W,S-W Kashmir, T.showers over N,central, S. Karnataka, N,N-W, S.central Tamilnadu ..
Present Low over S,S-W Bay may move intially towards Tamilnadu coast as the Upper air steering is towards W-N-W ...

Tornado Tracks in Tuscaloosa, Alabama

Deadly tornadoes raked across Alabama on April 27, 2011, killing as many as 210 people as of April 29. The hardest-hit community was Tuscaloosa. The top image, acquired on April 28 by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite, shows three tornado tracks through and around the city. The lower image, from April 12, shows the area before the storm.
The tracks are pale brown trails where green trees and plants have been uprooted, leaving disturbed ground. Though faint, the center track runs from southwest of Tuscaloosa, through the gray city, and extends northeast towards Birmingham. Two other tracks run parallel to the center track. The northernmost track lies in an area where the National Weather Service reported a tornado, but no tornado was reported in the vicinity of the more visible southern track. In the southern region, strong winds were reported.
The tornadoes were part of a larger weather pattern that produced more than 150 tornadoes across six states, according to the National Weather Service. The death toll reached 300 on April 29, making the outbreak the deadliest in the United States since 1974.
2pm, a lone T. cell over S-S-E Karnataka and another one over N. Tamilnadu ... Reports of Heavy T.shower over Bangalore.
RT @asury: @weatherofindia"Still it is not raining around Vidhana Soudha" -- Bangalore (2:30pm)
RT @vaidya_r: Hailstorm!! :) rain Bangalore (2:33pm)
RT @quakereports: earthquake: M 6.1, south of Panama
RT @rakshitaravi: @juhipande Come down to Bangalore. The rain is keeping the heat down. :) (2:17pm)
RT @krishnanblr: Its a BIG THUNDER and series of Lightning and THUNDER RAIN disrupted Saturday weekend life in Bangalore. (2:19pm)
RT @kaveerr: Rainin again in bangalore .... its awesome walkin in the rain (1:55pm)
RT @jdterish: Ice rain in bangalore, hulla! .. HAILS ... (1:56pm)
RT @krishnanblr: Super RAIN washing away South Bangalore on Saturday Afternoon. hailstone expected. (1:50pm)
RT @trilobite_1970: Heavy rain and furious winds lash Bangalore. Waiting for the power supply to go also. What a weekend! (1:46pm)
Chennai - Temperature touched a max of 35.4 C and now also its around 35 deg C... Mild wind from S-E.. this'll cool things in another 1.5 hr
On 29-Apr, Pune sizzles at 39.7 deg C ...

Bay shaping up to host season’s first ‘low’

A low-pressure is now expected to pop up over the Bay of Bengal by Sunday as a persisting upper air circulation descends to lower levels and matures.
In the run-up to this likely denouement, the Andaman and Nicobar Islands are expected get buffeted by rains or thundershowers over the weekend, India Meteorological Department (IMD) said on Friday.

The seas have warmed up to well above 30 deg Celsius, which is more than enough to sustain the brewing ‘low.’
This would also help steer the flows in the Bay to being more easterly to southeasterly, after having seen the back of a harmful ‘ridge’ or high-pressure region that has been pushed away.
The ‘low’ has been delayed this year from mid-April, which is normally the time around which the Bay gets its act together.
Meanwhile, peninsular India and adjoining east India, constituting two-thirds of the landmass in south, central and east-central regions, has witnessed surplus summer rains for almost two months between March 1 and April 27.

Rainfall deficiencies have been confined to extreme west and northwest, according to an update provided by the IMD.
The Gujarat and Sourashtra region, Madhya Pradesh, Rajasthan, Punjab, Haryana and Delhi, Himachal Pradesh and Uttar Pradesh totted up varying deficiencies.
Jammu and Kashmir was the only Met subdivision to record a normal (+5 per cent) rainfall in the northwest while only Gujarat was totally devoid of any rainfall.
Among the Met subdivisions which surprised on the upside with surplus rainfall thus far during the season are Telengana (+43 per cent); Rayalaseema (+28 per cent); Vidarbha (+75 per cent); Chhattisgarh (+117 per cent); Bihar (+36 per cent); Gangetic West Bengal (+101 per cent); north interior Karnataka (+67 per cent); and south interior Karnataka (+103 per cent).

The larger Maharashtra, Andhra Pradesh, Orissa and Jharkhand states also found themselves falling in the ‘normal’ category.
One significant fall-out of the rainfall pattern has been the less than normal cooling of these regions and total absence of heat waves that normally take a toll on human and animal lives.
Some weather watchers have also tended to view with this caution in terms of the likely impact on the impending of the monsoon that drives essentially on land-sea surface temperature contrasts.
Global weather models are, however, of the view that sustained heating of the land surface has already started from northwest India and would filter into central, east-central and parts of peninsular India from the coming week onwards.

Meanwhile, fairly widespread overnight rain or thundershowers has been reported from Andaman and Nicobar Islands overnight on Friday.
It was scattered over sub-Himalayan West Bengal, Sikkim, Meghalaya and Tripura and isolated over Jammu and Kashmir, east Uttar Pradesh, Orissa, south interior Karnataka and Tamil Nadu.
On Thursday, maximum temperatures were above normal by 2 to 4 deg Celsius over some parts of Punjab, east Rajasthan, northwest Madhya Pradesh.
But they continued to be below normal by 2 to 4 deg Celsius over Chhattisgarh, Jharkhand, Tripura and Orissa.

The highest maximum temperature of 44.0 deg Celsius was recorded at Churu (Rajasthan), Jalgaon (Maharashtra) and Khargone (Madhya Pradesh) on Thursday.
Satellite pictures early on Friday morning showed the presence of convective (rain-bearing) clouds over parts of Jammu and Kashmir, Bihar, sub-Himalayan West Bengal, Sikkim, Assam, Kerala, Tamil Nadu, south and east-central Bay of Bengal and the Andaman Sea.
The western disturbance over north Pakistan and adjoining Jammu and Kashmir now lies over Jammu and Kashmir. It would affect western Himalayan region and adjoining plains of northwest India until Monday.
Meandering of WD to flow into BOB ...
Low pressure Area in Bay ... "95 B" -- Update #1 ...

Low pressure Area in Bay ... "95 B" -- Update #1

Present position of Low ..
9.2 N and 90.1 E
Pressure :: 1004 mb
Wind speed :: 40 to 45 KmpH

Expected to become as a Cyclone in next 3 to 4 days and will move in N-N-E direction further into Bay.
More on this brewing system ... "Meandering of WD to flow into BOB"
RT @joshva: How lovely is the sun after rain, and how lovely is laughter after sorrow. ~ Tunisian Proverb
sudden and violent TS activity near Pullambadi in Trichy district of Tamilnadu to day 30-Apr .. early hours...