Ray of hope for drought-hit Telangana as low pressure over Bay of Bengal likely to bring heavy rain

The developing system is a weather disturbance over the Bay of Bengal that is expected to strengthen and cross the Andhra Pradesh coast. The article does not give a more specific classification at this stage, but says its track and intensity should become clearer after it develops into a depression. That matters because Telangana is facing a rainfall deficit and concerns over drinking-water supplies.

A low-pressure system has lower air pressure than surrounding areas. Air and moisture move toward it, helping clouds and rain develop. As this system travels inland after crossing the coast, its rain bands can affect Telangana. The IMD expects the strongest effects on October 28, especially in eastern and northeastern districts. Mulugu, Bhadradri Kothagudem and Khammam have red alerts.

The system is expected to move relatively quickly, so its main impact may be concentrated on one day. Rain could continue into October 29, mainly in districts across eastern, northeastern and southern Telangana. The exact rainfall pattern depends on how the system develops and where it moves.

The IMD expects the system to cross the Andhra Pradesh coast on the evening of October 27. The latest projected crossing area is between Machilipatnam and Visakhapatnam. Its effects are expected to reach Telangana on October 28, when the system moves inland and brings widespread concern about heavy rain.

The strongest October 28 focus is eastern and northeastern Telangana. Red alerts cover Mulugu, Bhadradri Kothagudem and Khammam. Orange alerts cover Jayashankar Bhupalpally, Mahabubabad, Warangal, Hanumakonda and Suryapet. Hyderabad’s current forecast indicates moderate rainfall, showing that the system’s impact will not be uniform across the State.

Rain may continue into October 29. Yellow alerts then cover Mancherial, Jayashankar Bhupalpally, Mulugu, Bhadradri Kothagudem, Khammam, Nalgonda, Suryapet, Mahabubabad, Warangal and Hanumakonda. The IMD expects heavy rainfall at isolated places, so local conditions may vary even within alerted districts.

The October 28 forecast names 16 Telangana districts across the three alert categories. Three districts—Mulugu, Bhadradri Kothagudem and Khammam—have red alerts. Five have orange alerts: Jayashankar Bhupalpally, Mahabubabad, Warangal, Hanumakonda and Suryapet. Eight have yellow alerts: Mancherial, Rajanna Sircilla, Karimnagar, Peddapalli, Jangaon, Nalgonda, Siddipet and Yadadri Bhuvanagiri.

The red-alert districts face heavy to very heavy rainfall, with isolated extremely heavy rain likely. Orange-alert districts face heavy to very heavy rainfall at isolated places. Yellow-alert districts face heavy rainfall at isolated places. These categories communicate increasing concern, from localized heavy rain to the possibility of exceptionally intense downpours.

The article uses the IMD’s alert terms but does not provide rainfall thresholds for each colour. It also separately gives a yellow alert for 11 districts on October 29. Those next-day districts overlap with several October 28 alerts, so the October 28 total is best counted as 16 named districts.

Telangana is grappling with a rainfall deficit, and the article links this shortfall to mounting concerns about drinking-water availability. Rain from the Bay of Bengal system could therefore provide important relief. It may replenish local water sources and improve short-term availability, especially in districts receiving the heaviest rain.

The likely benefit depends on where and how much rain falls. The IMD forecasts heavy to very heavy rain, with isolated extremely heavy rain in Mulugu, Bhadradri Kothagudem and Khammam on October 28. Rain is also possible in several other districts on October 29. Because rainfall may be concentrated in particular areas and days, its effect on water supplies will not be equal across Telangana.

The article does not quantify the rainfall’s effect on drought conditions or drinking-water reserves. It presents the system as a source of hope, not a guaranteed solution. The system’s final track, intensity and rainfall distribution will determine whether the improvement is broad or mainly local and temporary.

The projected track shifted southward because the IMD’s latest assessment differed from its initial assessment. Initially, the system was expected to cross between north Andhra Pradesh and south Odisha. The newer forecast places the crossing between Machilipatnam and Visakhapatnam, farther south along the Andhra Pradesh coast.

The article does not identify the scientific reason for that revision. It reports the change through comments from Srinivas GNRS, a senior meteorologist at the IMD Centre Hyderabad. Forecast tracks can be updated as meteorologists receive new observations and models show a different movement, but that broader explanation is not given specifically in the article and should not be treated as its stated cause.

The revised track matters because it changes where the system’s strongest effects may be felt. The IMD expects impacts across Telangana on October 28, especially in eastern and northeastern areas. It also says the precise track and intensity will become clearer after the system develops into a depression.

El Niño is a climate pattern in which surface waters become unusually warm across the central and eastern tropical Pacific Ocean. This warming changes air pressure, winds and the movement of tropical rainfall around the world. Its effects vary by region and season, but it can influence India’s monsoon rainfall.

For parts of India, El Niño can weaken monsoon circulation or shift rainfall away from areas that depend on it. That can produce below-normal rainfall and longer dry spells. In this article’s setting, Telangana is already experiencing a rainfall deficit, while concerns are mounting over drinking-water availability. The article identifies El Niño as an influence behind those concerns.

El Niño does not determine every rainfall event by itself. The Bay of Bengal system described here may still bring heavy rain to Telangana late in October. The IMD expects its main effects on October 28, with possible rain on October 29. Whether this meaningfully improves conditions depends on the system’s track, intensity and rainfall distribution.

A low-pressure area develops into a depression when its circulation becomes stronger and more organised, with pressure falling further around its centre. The article says the system’s precise track and intensity will become clearer after it develops into a depression. It does not provide technical pressure or wind thresholds for that stage.

Track matters because it determines which districts lie beneath the system’s rain bands as it moves from the Bay of Bengal across the Andhra Pradesh coast. The latest forecast places landfall between Machilipatnam and Visakhapatnam, with Telangana’s eastern and northeastern areas most exposed on October 28. Intensity matters because a stronger system can support heavier rain and more active thunderstorms.

The IMD forecasts thunderstorms with lightning and gusty winds at isolated places in nine districts on October 28. Heavy rain may continue into October 29 in 11 districts. Since the system may move quickly, its effects could be concentrated on October 28, but the final outcome depends on its eventual development and movement.