Representative image. Jorge Royan, CC BY-SA 3.0, Wikimedia Commons
हिन्दी में सारांश Summary in Hindi
- आईएमडी की तालिका में 9 नवंबर को बंगाल के दोनों मौसम उपखंडों में छिटपुट बारिश का पूर्वानुमान है।
- दोनों क्षेत्रों में 10 और 11 नवंबर को कुछ स्थानों पर बारिश का पूर्वानुमान है।
- 9 नवंबर को जारी चेतावनी पृष्ठ पर आज दोनों उपखंडों के लिए कोई चेतावनी नहीं है।
বাংলায় সারাংশ Summary in Bangla
- আইএমডির সারণিতে ৯ নভেম্বর বাংলার দুই আবহাওয়া উপবিভাগেই বিচ্ছিন্ন বৃষ্টির পূর্বাভাস রয়েছে।
- ঞ্চলেই ১০ ও ১১ নভেম্বর কিছু জায়গায় বৃষ্টির পূর্বাভাস রয়েছে।
- ৯ নভেম্বরের সতর্কতা পাতায় আজ দুই উপবিভাগের কোনওটির জন্যই সতর্কতা নেই।
Why it matters
Rainfall coverage and warning status describe different things. Reading both helps residents plan for possible showers without treating a regional forecast as an hourly local warning.
The Bengal rain forecast for Monday, 9 November, points to isolated showers in both Gangetic West Bengal and Sub-Himalayan West Bengal with Sikkim. The India Meteorological Department’s (IMD) night bulletin, issued at 9.02 pm on Sunday, then shows scattered rain on 10 and 11 November.
Rain in the forecast does not mean a weather warning is in force. IMD’s subdivision warning page, dated 9 November, lists no warning for either of the two regions on Monday. The rainfall coverage and warning status are separate pieces of information.
Bengal rain forecast: what the daily table says
The bulletin divides the state between Gangetic West Bengal and the Sub-Himalayan West Bengal and Sikkim subdivision. Its seven-day rainfall table gives both regions isolated rain on 9 November, followed by scattered rain on 10 and 11 November.
The rows separate on 12 November. The table marks Gangetic West Bengal as dry, while the northern subdivision retains isolated rain. For 13 and 14 November, both rows are marked dry. These are subdivision forecasts, rather than a promise about every locality in the region.
| Forecast date | Gangetic West Bengal | Sub-Himalayan West Bengal and Sikkim |
|---|---|---|
| 9 November | Isolated rain | Isolated rain |
| 10 November | Scattered rain | Scattered rain |
| 11 November | Scattered rain | Scattered rain |
| 12 November | Dry | Isolated rain |
The summary on page one describes isolated to scattered rainfall over both subdivisions during 9 to 12 November. The more detailed table does not show rain in Gangetic West Bengal on the final day of that window. This article preserves that difference, rather than treating every date in the broad summary as identical.
Isolated and scattered describe coverage, not a personal rain chance
IMD’s legend defines isolated rainfall as rain at 1% to 25% of stations and scattered rainfall as rain at 26% to 50% of stations. Those percentages describe the expected distribution across a subdivision. They are not a 25% or 50% probability that rain will fall on one particular home.
The terms also do not specify how heavy an individual shower will be. A coverage label and a heavy-rain warning answer different questions. Reading one as the other would exaggerate what this forecast establishes.
For comparison, the same bulletin’s warning section explicitly names the Andaman and Nicobar Islands and Tamil Nadu, Puducherry and Karaikal for isolated heavy rain on 9 November. Bengal is not included in that day’s heavy-rain list. That is a statement about this bulletin’s named areas, rather than a guarantee that weather cannot change later.
What does no warning mean for Monday plans?
The official subdivision warning page lists no warning for both Bengal regions on 9 November. It should be read alongside the rainfall table: rain is forecast at isolated places even though a warning is not displayed.
Residents travelling, working outdoors or organising events can use the regional forecast as background and check IMD’s local forecast or nowcast nearer their activity. The Regional Meteorological Centre Kolkata website links to district forecasts and short-term nowcasts. This bulletin does not give an hourly arrival time for a shower at a particular station or venue.
Monday transport arrangements are a separate issue. Our Kolkata Metro service report explains the reduced programme on three lines. The weather bulletin does not attribute that service change to rain, and no such connection is being made here.
The forecast clock starts at 8.30 am
The bulletin says a forecast for a named day is valid from 8.30 am that day until 8.30 am the next day. Monday’s rainfall entry therefore covers the period ending on Tuesday morning, rather than simply the hours before midnight.
The useful next check is a newer dated IMD bulletin or local nowcast. A forecast published late on 8 November remains a forecast for the coming days; it is not evidence that those showers have already occurred. No district-level damage, disruption or closure is established by these two official records.
Frequently asked questions
Does no warning mean no rain in Bengal on 9 November?
No. The rainfall table forecasts isolated rain in both subdivisions, while the separate warning page lists no warning today.
Does isolated rain mean a 25% chance at my home?
No. IMD’s legend uses 1% to 25% of stations to describe coverage across the subdivision.