DRY HOT WEATHER

To day [22.05.2014 /1730 hrs IST]  Chennai reported a dew point of about 17.6 Deg Celsius. Dew point is the MEASURE related to the amount of moisture present in the air at the given temperature where as Relative Humidity is related to how close the air and moisture are at the given temperature to become saturated. LOW Dew Point is lesser moisture.  So today is DRY & HOT weather.

பனிதுளி உருவாகும் வெப்ப நிலைக்கும் [DEW POINT] ஈரப்பதத்திற்கும் [RELATIVE HUMIDITY] நிறைய வேறுபாடு உண்டு. பனித்துளியாக உருவெடுக்கும் வெப்ப நிலை என்பது எந்த ஒரு குறிப்பிட்ட வெப்ப நிலையிலும் காற்று ஏற்று  இருக்கும் நீராவியினை பொருத்து அமையும். வறண்ட அனல் காற்றில் பனி துளி உருவாகும் வெப்ப நிலை குறைவாக இருக்கும். இன்று வீசியது வறண்ட அனல் காற்று ஆகும்.  

There is a formation of cloud mass just towards EAST of Chennai(otherwise a LOPAR ).  It drew DRY [Northerly] to NWly winds from landmass and the temperature shoot to 40 Degree Celsius. The dry hot [radiative] weather is felt today.  However in the evening winds backed to westerly to SWly , to align as outer band for the LOPAR and convective clouds formed.  It may give rain

Vellore rain !

Vellore - 3:55pm, Raining atlast !!


Vellore - 6:10pm, More moderate rain !



6:33pm, Heavy rain startd #nexus5 #vellore

Weather Instagram at May 22, 2014 at 03:17PM

#chennai - 3:10pm, hottest day 42C. Now signs of rain over west. #weather

from Instagram

#Chennai - 1:15pm, #HOT at 40 C and feels like 46 C !!

#Chennai - 2:05pm, NO sea breeze yet !

92B - Depression and drifted North.

Analysis at 1pm, suggest that Depression 92B has slightly drifted North into N-E Bay and near to Myanmar coast during past 24hrs. 
No intensification observed, but the mid,upper-level circulation of the system has become elongated from N-N-E to S-S-W. Only the low-level circulation is concentrated at the moment.

Thai met observes that Present pressure at the core is around 996mb (equivalent to Deep depression / Cyclone), but US NAVY puts it around 1000mb.

JTWC warning at 1pm
~~~~~~~~~~~~~~~~~~~~~~

THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 16.1N 
91.4E, IS NOW LOCATED NEAR 17.0N 92.1E, APPROXIMATELY 315 NM SOUTH 
OF CHITTAGONG, BANGLADESH. ANIMATED MULTISPECTRAL SATELLITE IMAGERY 
DEPICTS A BROAD AND POORLY DEFINED LOW-LEVEL CIRCULATION CENTER 
(LLCC) WITH FLARING AND FRAGMENTED DEEP CONVECTION. A 220336Z AMSU-B 
MICROWAVE IMAGE REVEALS A SLOPPY STRUCTURE WITH SEVERAL ISOLATED 
BURST OF DEEP CONVECTION MOSTLY LOCATED ALONG THE WESTERN SEMI-
CIRCLE. AN OLDER 220021Z WINDSAT PASS SHOWS A SLIGHT CONSOLIDATION 
IN THE LLCC WITH 15 TO 20 KNOT WINDS ALONG THE EASTERN PERIPHERY 
WHILE STRONGER WINDS ALONG THE DEEP CONVECTION IS RAIN-FLAGGED AND 
NOT CONSIDERED RELIABLE. WARM SEA SURFACE TEMPERATURES IN THE AREA 
REMAIN CONDUCIVE FOR FURTHER DEVELOPMENT. UPPER-LEVEL ANALYSIS 
INDICATES THE DISTURBANCE IS LOCATED IN AN AREA OF MODERATE TO 
STRONG (20 TO 30 KNOTS) VERTICAL WIND SHEAR WHICH IS BEING SLIGHTLY 
OFFSET BY GOOD OUTFLOW. MAXIMUM SUSTAINED SURFACE WINDS ARE 
ESTIMATED AT 25 TO 30 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED 
TO BE NEAR 1000 MB. NUMERIC MODEL GUIDANCE IS VARYING IN THE 
DEVELOPMENT OF THE SYSTEM AS IT SLOWLY DRIFTS TO THE NORTH-
NORTHWEST. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT 
TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS HIGH.

12:30pm, Satellite reveals, strong convective activity only along its South quadrant and near to centre.
Rest of #India is clear and #hot.

Today over inland, the low-level N-S trough from N Bengal has drifted East and now along S-E coast of India upto N Tamilnadu.
The S-S-E Arabian sea circulation also persists and will weaken in next 2 days.

Models did not expect 92B to become as a Cyclone, but expects the Depression to drift N-N-W in 24hrs and then West towards Odisha coast on 24/25-May.
If 92B drifts towards Odisha coast, the inland N-S trough will drift West on 24-May.

Rainfall alert ::
~~~~~~~~~~~~~~~~

During next 18hrs, T showers again expected over W,S,S-W Karnataka, most of W-ghats Kerala into N,N-W,W,N-E,N-central Tamilnadu.
Tomorrow, noon, evening - more T showers expected over W-ghats Kerala and into N,N-E,N-W,central Tamilnadu.
During early hrs and into morning showers possible along S Kerala coast and along coast of S tip Tamilnadu.

Chennai - Today, 23-May - T cells will show up along W,S-W suburbs ... isolated chance of rain pushing into city. Till 2pm, HOT day with dry winds from W-N-W is expected on 22,23-May.

A good article on "DIFFERENCE BETWEEN MONSOON AND PRE-MONSOON RAIN" ... http://ow.ly/x84jr 

Weather Instagram at May 22, 2014 at 11:52AM

#chennai - 11:40am, Hot and humid. Hotter than yesterday. #weather

from Instagram

At 9:51pm, 6.0 earthquake rocks Bay near Odisha coast, around 275km S-E from Paradip.