Heavy Rainfall likely over Kolkata: Persistent Moderate Rainfall for one week
Representational Image: AI-Skymet
Key Takeaways:
- Kolkata is expected to witness a weeklong spell of moderate monsoon rainfall with one or two heavy downpour events.
- A cyclonic circulation over South Bangladesh and adjoining regions will support increased rainfall activity.
- The monsoon trough is likely to shift into a more favourable position after three to four days, enhancing rainfall further.
- Daytime temperatures will remain around 30°C due to persistent cloud cover and intermittent showers.
- Forecast Validity: Next 3 to 5 days.
Kolkata has not received any heavy monsoon rainfall so far in July this season. In June, following the onset of the monsoon, the city witnessed heavy showers on a couple of occasions, but rainfall activity slowed down with the arrival of July. July and August are typically the rainiest months for Kolkata, with monthly rainfall generally exceeding 350 mm. So far, the city has recorded about 130 mm of rainfall in July against the normal of 366.5 mm. A weeklong spell of moderate rain is likely, embedded with heavy downpours on one or two days.
A cyclonic circulation is marked over South Bangladesh and the adjoining sea region. A north-south trough extends along 88°–89°E, passing close to the capital city. The North Bay of Bengal and adjoining Gangetic West Bengal are likely to remain under the influence of a circulatory wind pattern over the next few days. Under its influence, a monsoon system may also develop later. The seasonal monsoon trough, another key trigger for rainfall, is currently positioned north of its normal location. It is expected to shift into a more favourable position over the next three to four days, further enhancing rainfall activity.
Kolkata and its suburbs are expected to receive moderate to heavy rainfall over the next 24 hours. Rainfall intensity may reduce briefly tomorrow before picking up again during the second half of the week. Cloudy skies, accompanied by intermittent spells of rain and thundershowers, will keep the daytime temperature suppressed at around 30°C (±1°C). Most of the weather activity is expected during the late afternoon, evening, and nighttime hours.
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