EXCLUSIVE | IMD Signals Low Pressure on Oct 13: 160mm Rain for Andhra & Chennai, Cool Overcast Skies for Puja Revellers in Odisha Bhubaneswar

Bhubaneswar: With the IMD Friday press release declaring that the formation of a low-pressure area is imminent over the Southeast Bay of Bengal around mid-October, the moot question gripping denizens across Odisha is: what next?

While rumours of a tropical cyclone threatening the eastern coast of India during the peak of Durga Puja have been brewing in the local air for days, citizens are watching with fingers crossed. The timing of this brewing system coincides directly with the annual festivities, which are celebrated with immense gusto across the state.

Amidst these high-rolling rumours of a festive washout, Friday's synoptic update from the IMD provided a clear look at the actual contours of the upcoming Bay system.

Furthermore, the latest array of global weather models – stretching from India’s top modeler NCMRWF (Mithuna) to Australia’s ACCESS-G, Europe's ECMWF, and the US-based NCEP-GFS et al – have aligned to conclusively blow away any threat of a cyclone looming over Odisha.

THE IMD OUTLOOK

The national weather forecaster IMD has released its latest synoptic overview today, confirming that while an active tropical pulse is migrating into the Indian Ocean basin, its structural dynamics and the prevailing atmospheric steering environment will prevent it from achieving cyclonic status.

According to the meteorological assessment,

·       An upper air cyclonic circulation currently hovers over the Gulf of Thailand and its immediate neighborhood, embedded deeply within the lower and middle tropospheric levels. This system is tracking steadily westward and is projected to emerge into the warm waters of the Andaman Sea around October 11, 2026.

·       Under the thermodynamic influence of high sea surface temperatures and favorable low-level convergence in that sector, the circulation is expected to organize into a formal low-pressure area over the Southeast Bay of Bengal around October 13, 2026.

To understand why the cyclone scare has evaporated, one must dissect the specific synoptic features detailed in the atmospheric bulletin issued by the national forecaster, which is detailed below:

·       The bulletin simultaneously tracks a series of mitigating atmospheric elements:

·       An upper air cyclonic circulation over north Bangladesh, another over East Uttar Pradesh,

·       A third over south Haryana, and

·       A prominent lower-tropospheric trough stretching from the Comorin area to North Interior Karnataka.

·       Furthermore, an active Western Disturbance is positioned as a cyclonic circulation over northern Pakistan, flanked by an additional upper air circulation over eastern Assam.

·       This complex web of continental systems plays a critical role in dictating the lifecycle and ultimate path of the Bay of Bengal system.

HOW WEATHER FORECASTERS REMAIN ON SAME PAGE

The structural evolution of this impending low-pressure area is well documented across the latest deterministic model runs, including the high-resolution NCMRWF-GLB forecasts and the Australian Bureau of Meteorology ACCESS-G charts.

In the preceding days, public anxiety was stoked by an isolated, highly volatile prediction from the American NCEP-GFS model, which briefly simulated a severe cyclonic storm charging toward the Odisha coast.

However, in latest deterministic cycles, the GFS model backed down significantly, aligning seamlessly with the European Centre for Medium-Range Weather Forecasts, the UK Meteorological Office model, and the national IMD-GFS framework.

The multi-model consensus establishes that the system lacks the foundational physics required to undergo rapid intensification. It will remain a broad, sprawling, asymmetric system classified as either a standard Low-Pressure Area or a Well-Marked Low.

Because the system's energy is distributed over a massive geographic radius rather than being tightly concentrated around a compact, warm core, it cannot develop the intense pressure gradients necessary to generate destructive gale-force winds.

THE WALL FOR ODISHA

The primary mechanism shielding Odisha from a direct hit is a robust, dry continental ridge anchored firmly over northern and central India. This high-pressure ridge acts as an impenetrable atmospheric wall.

While the IMD's synoptic bulletin lists localized upper air cyclonic circulations over Haryana, East Uttar Pradesh, Bangladesh, and Assam, these are shallow, lower-tropospheric features capped beneath a dominant, dry continental ridge.

This massive high-pressure system sitting over central and northern India acts as a macro-scale atmospheric shield. By compressing these smaller circulations into the lower levels and maintaining structural dominance over the upper atmosphere, the ridge successfully forms an impenetrable wall, pushing the Bay of Bengal's well-marked low away from Odisha and driving it deep into the southern coast.

The Tropical Fact: Systems naturally seek the path of least resistance, typically steering along the southern periphery of sub-tropical ridges. The presence of this continental air mass entirely blocks the system from executing a northward or northeastward recurrence toward the Odisha coast or the Sundarbans.

Instead, the steering currents will relentlessly push the well-marked low on a strict west-northwestward trajectory, guiding the core of the system directly toward the coasts of South Andhra Pradesh and North Tamil Nadu.

Landfall is projected to occur between October 16 and October 17, hundreds of kilometers south of the Odisha border.

ANDHRA PRADESH, CHENNAI TO BEAR BRUNT

Consequently, the severe, surcharged precipitation core – capable of dumping eighty to one hundred and sixty millimeters of rain – will be confined to districts like Nellore, Prakasam, Bapatla, and Chennai, leaving Odisha largely insulated from the system's hazardous elements.

BHUBANESWAR, CUTTACK DURGA PUJA WEATHER

For the capital region of Bhubaneswar, alongside the historic city of Cuttack, the festive meteorological outlook is exceptionally favorable due to a classic rain shadow phenomenon.

As the low-pressure area tracks across the southwestern Bay of Bengal, the outer, high-level peripheral cloud bands will sweep extensively across central and coastal Odisha.

However, due to the distance from the system's center and the inhibiting effects of the dry continental air mass descending from the north, these clouds will be non-precipitating in nature.

Vertical convective development will be severely suppressed, preventing the formation of heavy localized thunderstorms.

HIP HIP HURRAY FOR REVELLERS

Revellers in Bhubaneswar and Cuttack can expect a prolonged spell of overcast skies from October 14 through October 18, which will serve a highly beneficial dual purpose.

The thick cloud cover will effectively insulate the region from the intense solar radiation typical of early autumn, completely breaking the oppressive afternoon humidity known locally as the October heat.

Temperatures will remain comfortably modified, with only a marginal probability of brief, highly localized light drizzles that will pose no threat to the pandal-hopping crowds or outdoor community feasts.

REGIONAL OUTLOOK: ODISHA

A similar narrative of pleasant, dry weather extends across the vast expanses of Western Odisha and North Odisha.

Districts such as Sambalpur, Jharsuguda, Bargarh, and Rourkela in the west, alongside Balasore, Bhadrak, and Mayurbhanj in the north, are positioned entirely under the dominance of the continental ridge.

The latest accumulated rainfall maps indicate a total absence of precipitation across these zones throughout the entire seven-day forecast horizon.

Instead of receiving moisture from the Bay of Bengal, these regions will experience a steady influx of dry, northeasterly winds drawing down from the northern plains.

This atmospheric setup translates to crisp, clear mornings, minimal relative humidity during peak daytime hours, and cool, comfortable night breezes.

The structural stability of the atmosphere in northern and western Odisha means that Durga Puja celebrations will proceed under flawless outdoor conditions, totally unencumbered by the weather disruptions that frequently mar the festival during active monsoon withdrawal years.

WETTER DAYS IN SOUTH ODISHA

In contrast to the dry northern and central sectors, Southern Odisha will experience the tangible peripheral effects of the well-marked low as it makes landfall in neighboring Andhra Pradesh.

The southern tier, encompassing the districts of Malkangiri, Koraput, Rayagada, and parts of Gajapati, sits closer to the northern quadrant of the meteorological system.

Analysis of the deterministic rainfall maps reveals that the outer bands of the system will clip the southern tip of the state between October 15 and October 17.

The IMD subdivision forecast reflects this transition, shifting the regional status from isolated to scattered showers.

Meteorological projections estimate an accumulated rainfall quantity ranging between twenty and forty millimeters over these three days. This precipitation will manifest primarily as steady, light-to-moderate showers rather than violent downpours.

While organizers in Malkangiri and Koraput will need to take basic precautions to protect outdoor pandal structures from dampness, the absence of high-velocity winds means that the weather will remain manageable and entirely devoid of calamity-grade conditions.

WINDY BRAMHAPUR?

Further up the southern coast, the commercial hub of Bramhapur and the wider Ganjam district will occupy a transitional weather zone.

Located just north of the active precipitation bands, Bramhapur will experience strong, gusty northeasterly coastal winds peaking at thirty to forty kilometers per hour as the system approaches the Andhra coast on October 16.

The skies over Ganjam will remain deeply overcast, and while the risk of heavy rainfall is non-existent, the region may witness intermittent spells of passing showers.

These brief wet patches will be interspersed with long dry periods, allowing the local populace ample opportunity to participate in festive rituals without facing prolonged disruption.

By October 18 and 19, as the low-pressure system disintegrates over the rugged terrain of interior Andhra Pradesh, the residual moisture will dissipate rapidly, bringing a swift return to uniform dryness across the entire southern coastline of Odisha.

THE BOTTOMLINE

The objective data provided by IMD's synoptic bulletin, corroborated by the global numerical consensus, paints a definitive picture for Durga Puja 2026.

There is no cyclone looming in the Bay of Bengal, and the eastern coast is entirely secure from a severe tropical strike during this critical festive window.

While South Andhra Pradesh prepares for a significant, rain-bearing encounter with a well-marked low, Odisha stands to benefit from a highly favorable atmospheric layout.

The combination of protective continental ridges and localized rain shadows guarantees that from the bustling pandals of Bhubaneswar and Cuttack to the serene landscapes of western and northern Odisha, the weather will act as a benevolent backdrop to the grand celebrations, offering cool, overcast comfort instead of a seasonal disaster.

For festive revellers across Bhubaneswar, Cuttack, and the northern and western districts, the atmospheric setup ensures that the ongoing festive season will be characterized by extensive cloud cover and pleasant thermal relief rather than catastrophic coastal gales and torrential downpours.

Also Read:EXCLUSIVE|No Cyclone in Bay of Bengal this Durga Puja; South Andhra Pradesh to Bear WML Brunt, South Odisha to Bhubaneswar under Rain Shadow!