Northeast monsoon has made a poor start across South Peninsula. Although, the arrival of monsoon was announced on 21stOctober which nearly coincided with its normal date of 20thOctober, but the typical feel of change of season is yet to witness. The week gone by from 19th – 25th October was the driest period for entire South Peninsula, outside state of Kerala. South Peninsula recorded 6.3mm rainfall against the normal of 33.1mm, a shortfall of 81%. There are rains likely towards the fag end of the month but not adequate enough to better the rainfall stats of October.
Northeast monsoon is the chief rainy season for southern meteorological sub divisions but more so for the state of Tamil Nadu. The state receives 48% of its annual rainfall during the three month old season, from October to December. Long period average( LPA) for the entire South Peninsula is 334.13mm during northeast monsoon. This is based on 50 years data from 1971 to 2020. Out of five sub divisions covered by northeast monsoon, namely Tamil Nadu, Kerala, Coastal Andhra Pradesh, Rayalaseema, South Interior Karnataka, Kerala is the rainiest with 491.6mm rainfall, closely followed by Tamil Nadu with 449.6mm.
Northeast Monsoon shows high degree of variability and the coefficient of variation is 27%. As such, the range of normal rainfall also widens. As compared to the normal range of 96% to 104% rainfall of LPA of southwest monsoon season, northeast monsoon has a normal range of 88% to 112%. In its season’s long range forecast, the National Weather Service had predicted normal rainfall for northeast monsoon 2023. It also forecast a normal rainfall of 85% -115% rainfall of LPA for the month of October 2023. This target is likely to fall short by a big margin. As of today, the month is deficit by 28% rainfall which may marginally improve by month end.
Northeast monsoon is influenced by global climate parameters such as ENSO, IOD, MJO. El Nino, +VE IOD and MJO in Phase 2-4 with amplitude >1 are generally associated with better northeast monsoon rains. Also, La Nina and -VE IOD mostly corrupt the northeast monsoon. This was largely vindicated by two diverse northeast monsoon of 2015 and 2016. Year 2015 was a strong El Nino year with positive IOD, where as 2016 proceeded under the shadow of La Nina, coupled with negative IOD. Monsoon 2015 ended with a surplus of huge 52% rainfall with unprecedented floods over north coastal districts of Chennai, Kanchipuram and Thiruvallur. Northeast monsoon 2016 finished with disastrous shortfall of 62% rainfall, one of the record highest in the recent past.
The current season has made a dismal start with October likely to go as driest on record, since last 5 years. This can be attributed to the impact of El Nino on the retreating southwest monsoon. Recovery is likely under the influence of El Nino and positive IOD in the core monsoon months of November and December. MJO, a transiting parameter may also become favourable around middle of November.
The 26th instalment of the Cricket World Cup match between Pakistan and South Africa will be played at MA Chidambaram Stadium in Chennai on October 27. The match will start at 2:00 PM IST. We expect warm and humid weather conditions over Chennai during the match.
The temperature will be around 31° at the time of commencement of the match. Humidity levels will also remain high around 70% during the initial period of the match. Therefore, there may be some discomfort weather-wise.
The weather will become somewhat comfortable after 6:00 p.m. We expect mild dew over the pitch and ground during the second half of the match. The chance of rainfall is ruled out. The sky may remain partly cloudy with light to moderate winds from an easterly direction.
The arrival of the northeast monsoon was announced last week, albeit with a caution of a weak phase to start with. However, the entire region nearly parched even after the formal arrival of winter monsoon. The week gone by, between 19 – 25 October, practically received no rains in most parts covered by the northeast monsoon. Most of the meteorological sub-divisions, except Kerala, have been abandoned by the seasonal rains with deficiencies as large as 95% to 100%. The state of Karnataka, which was left marooned in parts, even during southwest monsoon season, continues to witness the spectre of dehydrated fields, more so over the northern parts.
Northeast monsoon always brings hope and relief for the South Peninsula, more so when deceived by the summer monsoon rains. Northeast monsoon, which actually kick starts with bountiful rains over Coastal Andhra Pradesh and Tamil Nadu, still awaits a typical rainy spell vindicating the change of season. As such, more often than not, northeast monsoon has been making a late entry for the last few years. Against the normal date of 20th October, monsoon rains commenced on 28th Oct, 25th Oct and 29th Oct in 2020, 2021 and 2022 respectively.
The onset of the northeast monsoon has to wait complete withdrawal of the southwest monsoon, as no overlapping is provisioned in the criteria. Following the retreat of the southwest monsoon on 18th October, the stage was clear for the arrival of the northeast monsoon. However, the South India monsoon made a rather timid start, despite the formal announcement of onset on 21st October. Various meteorological factors stand to reason for such a soft beginning.
Establishing northeasterly flow over the South and Central Bay of Bengal becomes a prerequisite for this annual event. However, mere streaming of northeasterly winds may not suffice to fulfil the criteria. Unlike the Western Ghats, the Eastern Ghats are not tall enough to cause orographic lifting to set off sporadic rains. Also, the Eastern Ghats is a sub-set of discontinuous mountain ranges, from Odisha, Andhra Pradesh and Tamil Nadu, with a modest elevation of 600mtr to 900mtr.
As long as the northeasterly flow remains laminar, it will not trigger any monsoon bursts. Some perturbations may be feeble ones, in the form of troughs or waves, moving across the southern latitudes of the Bay of Bengal to act as catalysts. Such features have been missing so far. Trough in the easterly stream have weather belts ahead of the system, while the easterly wave activity trails rear of the system.
Cyclonic storms in the Indian seas disrupt the airflow. Storms originating over the Bay of Bengal and heading for Bangladesh or Myanmar lead to moisture depletion all along the coast and deep inland. The sapping of moist winds and alteration of thermal configuration delay the cloud formation over the landmass. Such storms also drain out a large chunk of energy from the sea surface. One such storm ‘Haroon’ just cleared the Bay of Bengal and Northeast India. Airflow with other captive parameters is expected to get replenished and resume normal within 72 hours.
Northeast monsoon activity will remain on mute for another 48 hours. Spread and intensity of rains will increase from 28thOctober and more authentically from 29thOctober. Tamil Nadu, Kerala, South Interior Karnataka and South Coastal Andhra Pradesh will simultaneously receive the first burst of northeast monsoon.
गुजरात राज्य आने वाले दिनों में गर्म दिन देखने के लिए पूरी तरह तैयार है। अभी भी, गुजरात राज्य देश का सबसे गर्म इलाका है, जहां भुज में कल तापमान 38.6 डिग्री सेल्सियस दर्ज किया गया।
इसके अतिरिक्त, मानसून की वापसी के बाद, यह सबसे गर्म क्षेत्र रहा है, हालांकि, कई दिनों तक तापमान 40 डिग्री से अधिक नहीं बढ़ा।
उत्तर में किसी सिस्टम का अभाव और दक्षिण में कुछ खास नहीं। राज्य में अच्छी धूप के साथ शुष्क दिन देखने को मिलेंगे। साथ ही, राजस्थान पर एक एंटी साइक्लोन देखा जाएगा जो इस क्षेत्र में नम हवाओं के आक्रमण को रोक देगा।
इस प्रकार, मौसम की स्थिति में कोई महत्वपूर्ण बदलाव की उम्मीद नहीं है और हम इस पूरे सप्ताह उच्च 30 के आसपास अधिकतम तापमान देखना जारी रख सकते हैं।
The state of Gujarat is all set to see hot days ahead. Even as of now, the state of Gujarat is the hottest pocket of the country with Bhuj recording 38.6 degrees Celsius yesterday.
Additionally, after the withdrawal of Monsoon, this has been the hottest pocket however, the temperatures didn't hoot in addition to 40 degrees for days together.
Absence of any system in the north and nothing much in the south. Dry days will be seen over the state with a good amount of sunshine. Also, an Anti Cyclone will be seen over Rajasthan which will prevent the incursion of moist winds over the region.
Thus, no significant change in weather conditions is expected and we can continue to see Maximums around the similar range in the high 30s this entire week.
The Northeast Monsoon usually marks its entry from Coastal Tamil Nadu and Coastal Andhra Pradesh. This time, however, it has been mild and rains have almost remained absent. The city of Chennai also has seen a similar situation.
The ICC World Cup Match 2023 is being hosted in India and Chennai is one of the cities where these World Cup games are being held. No rains in Chennai have kind of been a boon for these games as they were held without interruption in terms of weather.
Now, there is only one match left for Chennai to host, which is tomorrow. After that, no match is being hosted by the capital city of Tamil Nadu as rains are all set to make an appearance over Chennai around the 28th of October.
Chennai is always vulnerable to rains during the Northeast Monsoon season and these showers are mostly during the evening and the night time which is also the time of the match being played.
Light to moderate rains are expected to be seen over the city of Chennai from October 28th. There may not be heavy showers over the region.
The southern parts of the country have seen the arrival of the Northeast Monsoon, but the onset has been a mild one. Moreover, last week was a very poor one for the region with almost no rains over the region.
Now rains are likely to make an appearance over the southern parts of the country. On October 26th and 27th, very light rains will be seen in parts of Tamil Nadu with moderate rains in isolated pockets of Kerala.
Both the intensity and spread will increase from October 28th over the states of Tamil Nadu and Kerala. These rains may spill over to South interior Karnataka as well.
The reason for these rains can be attributed to a cyclonic circulation which is in the southwest Bay of Bengal in the lower levels. A feeble trough is also extending along the Tamil Nadu coast. Another feeble trough is extending from Kerala to Coastal Karnataka.
While we do not expect heavy rainfall activity over any of these areas, it will definitely be a welcome change from the poor Northeast Monsoon week that the states saw last week.
We live in an era of connectivity and advancement. From entertainment to education, everything is dependent on an intricate mesh of hidden wires. We enjoy the conveniences brought to us not knowing about the hidden threat – heated wires.
Let’s study the causes and the remedies of overheating wires and protect commodities home appliances and our Cox Internet connections saving a lot of money and hassle in the long run.
What is Wire Heating?
Wire heating is a universal phenomenon in the world of electrical circuits. While the heating effect is the working principle behind a wide variety of appliances, from hair dryers to car air heaters, excessive, unintended heating can end up causing consumers and producers significant losses, especially when it leads to short-circuiting, which is the foremost cause of electrical fires today.
The real reason behind electrical circuits generating heat
The answer is simple high school physics: Electrical current is a form of energy transmitted via “waves” of elevated energy level. These waves are composed of “free” electrons which are usually the outermost electrons that become locally free due to the densely packed lattice structure of metals.
Upon application of a potential difference (measured in volts), these free electrons travel from the point of higher potential to that of lower potential. This can be thought of as a stream of water flowing downhill. The heating effect itself, on an atomic level, comes from these “free” electrons colliding with their parent lattice when passing along waves of electricity.
These collisions result in the dissipation of some of that energy into heat. Sure enough, the heat dissipated on the atomic level is tiny, but the effect scales with the conducting material’s size, which is why wires almost always feel warm to touch after prolonged usage.
Factors Causing Wires to Heat Up
Just like all 5 fingers aren’t the same, all conductors aren’t the same as well. You might have come across the puzzling phenomena where two wires of the same thickness (and sometimes even material) have different levels of heat when transmitting the same current.
Chances are, you’ve also seen the havoc these benign levels of warmth can inflict if left undetected or untreated. The golden question is, what causes the wires to heat?
Wire Size
This is a no-brainer. If you have to divert a stream carrying a thousand liters of water every minute, you’ll go for the biggest pipe you can find. Naturally, the smaller the pipe, the bigger the chance of the entire assembly failing, simply because there will be “too much pressure” on the pipe.
Wire Material
The heat dissipation in a conducting material is a direct product of its “resistance” i.e. the ability to inhibit the passage of current. This is inversely proportional to its cross-sectional area. Thus, increasing wire size (both, the number of cores and thickness of individual strands) will reduce losses and heat generation as a result.
Some materials, like copper, gold, etc have physical and atomic properties that enable them to conduct electricity well. This means, in comparison to other metals, they can carry a higher current without heating up.
Ambient Temperature & Current Load
In real life, regardless of the conductor, some electrical energy is always lost as heat to surroundings. When the rate of heat generation in your wire exceeds the rate, it seeps into the surroundings, heat gradually starts building up in the conductor.
This phenomenon is especially noticeable at higher current levels and compounds exponentially If the wires are placed in a heated area (say, next to a steam boiler in a constricted space)
Why is Wire heating Bad?
Well one of the main reasons, is evident from the problem itself. Fires due to short-circuiting are a leading cause of damage to life and property all over the world. The short-circuiting itself is often a result of prolonged wire heating.
Even if the heat isn’t enough to start a fire, repeated heating and cooling (when the circuit is switched off) can accelerate metal fatigue, which reduces its efficiency and results in increased wear & tear.
Reduced Efficiency
The heat given off by wires is wasted energy. Given the costs and overheads associated with the generation & supply of electricity, heat actually denotes a significant operational cost. Reducing the same not only eliminates risks but also reduces overheads.
How to minimize wire heating?
While it is impossible to make your circuits totally heatproof, here are a few steps you can take to minimize the menace of wire heating:
Material
You should always go for the purest material with a resistivity value as low as feasible for you. Upgrading from, say silver to copper strands, or from copper to gold strands will automatically reduce heat (and wire losses) for you, even if the rest of the parameters stay the same
Conductor Size
If it’s not possible to switch to a better material, a quick solution would be to increase the conductor size. Think of it like a road. If you can’t carpet it any better, adding more lanes is always a way of dealing with your “traffic jam”
Controlling Current
Even with the above factors, power surges are not uncommon and can spell doom for the unfamiliar user. Due to a wide number of reasons, your circuits can be flooded with current exponentially higher than the rated value. This can be prevented by the use of fuses and circuit breakers that cut off the power supply before the damage is done.
Controlling the external heat
Sensitive electrical equipment or installations consuming high levels of current should always be housed in a separate, air-conditioned enclosure. This has the added effect of safety, as access to unsusceptible bystanders is limited, and by maintaining a favorable temperature and humidity level in the space, one can ensure that no additional stress is placed on the system due to its surrounding environment.
With these steps, you can safeguard your home, appliances, and wired network from foreseeable damage. Timely and deliberate measures are better than a loss.
England will face Sri Lanka in the ICC World Cup's 25th instalment today, i.e., on October 26th in Bengaluru. The match will be played at the M Chinnaswamy Cricket Stadium from 2:00 p.m. The weather will be warm but comfortable during the first half of the match.
The temperature may be around 30 degrees at 2:00 p.m. and will decrease gradually. The weather will become comfortable after 6:00 p.m. and temperatures will be between 22 and 24 degrees. Relative humidity will also be on the lower side between 30 and 50%.
Therefore, we do not expect dew over pitch and ground. The sky will be almost clear. Light winds from the northeast direction will continue during the match. Wind speed will be 8 to 10 kmph.
राष्ट्रीय राजधानी में पिछले कुछ समय से मौसम साफ बना हुआ है। शहर में धूप खिली हुई है और तापमान सामान्य स्तर के आसपास बना हुआ है।
साफ आसमान और धूप के कारण दिन का तापमान थोड़ा बढ़ा है लेकिन सामान्य सीमा के भीतर ही बना हुआ है। न्यूनतम तापमान भी सामान्य स्तर 16 और 17 डिग्री के आसपास बना हुआ है।
चूँकि अक्टूबर का महीना न्यूनतम तापमान 22 डिग्री के आसपास शुरू होता है और महीने के अंत तक यह 17 डिग्री के आसपास पहुँच जाता है। हवाएं हल्की रहेंगी.
राष्ट्रीय राजधानी की वायु गुणवत्ता की बात करें तो यह बेहद खराब रहेगी। आने वाले दिनों में हवाएं हल्की रहने और बारिश नहीं होने से उच्च प्रदूषण स्तर में कोई सुधार होने की उम्मीद नहीं है।
The central parts of the country have been seeing dry and clear weather conditions for quite some time now as no system is in the proximity of the region that would result in some rains.
No significant weather is expected over the states of Maharashtra, Gujarat, Madhya Pradesh or Chhattisgarh in the next few days.
Talking about the state of Gujarat in particular, there have been higher temperatures in the region with the maximums settling in the higher 30s. and the minimums are in the low and mid 20s.
Other parts of Central India are seeing clear weather and temperatures well within the comfort levels. Some parts of Madhya Pradesh are seeing minimums settling even lesser than 15 degrees.
Maximums are also in the low 30s even for the states of Maharashtra and Chhattisgarh along with Madhya Pradesh. All in all, clear weather is expected to be seen in these parts.
The national capital has been seeing clear weather conditions for quite some time. The city has been seeing sunny days with temperatures settling around the normal levels.
The day temperatures have risen slightly due to clear sky and sunshine but continue to remain within the normal range. The minimum temperature is also settling around the normal levels of 16 and 17 degrees.
As it is the month of October begins with the minimums settling around 22 degrees and by month's end it goes around 17 degrees. Winds will remain mild.
Talking about the Air Quality of the national capital, it will remain very poor. With winds remaining on the lighter side and no rainfall in the coming days, no improvement is expected in the higher pollution levels.
