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

Bhubaneswar: The "October Cyclone" rumor mill has finally ground to a halt.

The lone predictor – the U.S.-based NCEP-GFS model, which had been hinting at an intensified cyclone striking the eastern coast and fueled heavy digital media hype here – has officially backed down.

The latest GFS model run now clearly flags the system as a Low-Pressure Area (LPA), bringing it into total alignment with consensus forecasts from the IMD, NCMRWF, ECMWF, and NCICS.

With the post-monsoon transition advancing, the tropical waters of the South-Central Bay of Bengal are showing signs of cyclogenesis. However, professional meteorological model assessments confirm that this upcoming weather system is not a tropical cyclone. It is a sprawling, slow-moving low-pressure area rooted in a broad cyclonic trough extending up to the mid-troposphere (500 hPa).

The latest model consensus from the IMD, NCMRWF, ECMWF and NCICS shows a system that will remain broad and structurally asymmetric. It lacks the tight, compact core required for rapid intensification into a severe cyclonic storm.

Meteorological Steering & Track Progression

Initial System: Broad Low-Pressure Area / Asymmetric Trough

Step 1: Steering Environment

• Driver: Weak Sub-Tropical Ridge (STR) Flattens & Recedes

• Effect: Creates an open steering path across the region.

Step 2: Primary Track Vector

• Movement: Northwest Drift across the South-Central Bay of Bengal.

• Primary Landfall: Direct impact hitting the South Andhra Pradesh / North Tamil Nadu Coast.

Step 3: Peripheral Fringe Impact

• Secondary Area: Outer northern fringe extends outward.

• Affected Region: Brushes the South Odisha coastline.

The system’s trajectory is dictated by a weak and receding Sub-Tropical Ridge (STR) over northern India. Because the STR is flat and pulled northward, it opens a clear steering path across the southern seas. This environment will guide the low-pressure area northwestward on a southerly track, targeting a landfall along the South Andhra Pradesh and North Tamil Nadu coast around October 16–17, 2026. This setup leaves northern regions well clear of the system's core.

The Impact Zone

The primary impacts of this low-pressure system will be felt along the lengthy coastline of Andhra Pradesh. Unlike a compact cyclone, which concentrates its damage around a small eye wall, this broad system will spread moderate-to-heavy rainfall across a wide area.

Primary Place: South Andhra Pradesh / North Tamil Nadu Coast

1. South-Central AP Impact Zone

Direct Core Landfall Area

• Affected Districts: Nellore, Prakasam, Bapatla

  
  

• Rainfall: Heavy, Surcharged Rain (70 - 120mm)

  
  

• Key Hazards: Localized urban and low-lying flooding

  
  

2. North Coastal AP Zone

Peripheral Inflow Track

• Affected Districts: Visakhapatnam, Kakinada

  
  

• Wind Conditions: Sustained easterly onshore winds

  
  

• Rainfall: Intermittent, moderate rain bands

1. The Direct Core: Nellore, Prakasam, and Bapatla

The center of the cyclonic vorticity core is projected to move ashore between Nellore and southern Prakasam districts. Residents in Nellore, Kavali, Ongole, and Bapatla can expect a steady increase in cloud cover and onshore winds starting October 14. By October 15 and 16, deep tropical moisture will surge inland, bringing continuous, heavy rainfall.

Accumulations are forecast to range between 70 mm and 120 mm, which could cause localized urban flooding and fill seasonal drainage channels quickly. Gusty winds will peak between 40 and 55 km/h along the coast. While these winds are well below cyclone thresholds, they can still damage temporary structures and displace loose items.

2. The Northern Inflow Flank: Tirupati, Chittor, and Rayalaseema Hinterlands

As the system moves inland, its outer rainbands will sweep through Tirupati and parts of the Rayalaseema region. The local topography will lift the moist air mass, triggering widespread moderate rain. This rainfall will provide a welcome boost to local agricultural reservoirs without causing widespread structural damage.

3. The Peripheral Coast: Visakhapatnam and Kakinada

Further north, away from the landfall zone, Visakhapatnam, Kakinada, and Eluru will sit on the system's outer northern edge. These areas will experience steady onshore winds and intermittent rain bands. While there may be brief downpours, the risk of severe weather remains low, and conditions will stay well below warning thresholds.

Gauging the System's Brushing Effect on Odisha

For Odisha, the southerly track of this low-pressure system is a reassuring development. Because the system is steered toward southern Andhra Pradesh, the dense core of cyclonic vorticity and heavy precipitation will pass well to the south. Odisha will only interact with the system's outer northern fringe.

Regional Weather Impact: South-Bound Low-Pressure Core

1. South Coastal & Hill Districts

Deepest Peripheral Incursion

• Affected Districts: Malkangiri, Koraput, Rayagada, Ganjam

• Precipitation: Light-to-moderate rain (20 - 40 mm)

• Key Conditions: Heavier peripheral incursion along the elevated terrain and southern coast.

2. Central Coastal & Urban Hubs

Distant Outflow Shield

• Affected Districts: Puri, Khordha, Cuttack, Jagatsinghpur

• Cloud Cover: Distant outflow cirrus shield creating widespread overcast skies

• Precipitation: Light, passing drizzles

1. The South Coastal and Hill Districts: Malkangiri, Koraput, Rayagada, and Ganjam

The southernmost districts share a border with Andhra Pradesh and will experience the deepest peripheral incursion from the system. In Malkangiri and Koraput, outer rainbands will cross the border between October 15 and October 17. This will bring overcast skies, cooler daytime temperatures, and steady, light-to-moderate rain.

Total rainfall accumulations are expected to hover between 20 mm and 40 mm. This rainfall will be gentle and beneficial for standing paddy crops rather than destructive. In Ganjam and Gajapati, the coastal hills will catch the northern moisture inflow, leading to brief periods of moderate rainfall and pleasant, cool easterly breezes.

2. The Central Coastal Strip: Puri, Khordha, and Jagatsinghpur

Further north, in Puri, Khordha (including Bhubaneswar), Cuttack, and Jagatsinghpur, the system's impact will be minimal. The outer edge of the system will appear as a high altitude cirrus shield, bringing overcast skies that will temporarily block the sun and break the intense "October Heat."

Residents may see light passing drizzles or brief showers as the system makes landfall further south, but no significant accumulation or disruptions are expected.

Why a Direct Turn Toward Odisha is Unlikely?

The high level of agreement across multiple weather models provides strong confidence in this forecast. The global model runs – supported by the sub-seasonal NCICS CFS anomalies – show that the northern Bay of Bengal is dominated by the stable, dry footprint of the continental ridge. This high-pressure area acts as a protective buffer, blocking the low-pressure system from moving north or curving toward the Odisha coast.

The system has a clear path into southern Andhra Pradesh, ensuring it remains a manageable rainmaker for the southern peninsula while allowing Odisha to escape a direct impact. Farmers in southern Odisha can use this forecast to plan their harvest schedules, confident that the region will see light-to-moderate rain rather than a severe tropical storm.
Also Read: North East Monsoon to Reach Tamil Nadu by October 17; Cyclone Rumors Explained