Haze is easing in some places, but Singapore is not clearing uniformly
By OnTheRice · Sources and limitations · Report a correction
Singapore’s latest local haze readings moved in different directions. The south improved sharply at 08:00 SGT on 13 October, while the north worsened.
Research reference · source time OTR Database Data · not a current quote or execution price · Reference source
Source confidence80% subjective editorial confidence in the patchy-easing synthesis; uncalibrated editorial judgement. Official 08:00 PSI and PM2.5 observations refreshed successfully by the lead researcher; no later observation is claimed.
What’s changing?
South one-hour PM2.5 rose from 76 at 06:00 to 107 at 07:00, then fell to 65 at 08:00. North rose from 54 to 63 between 07:00 and 08:00; west stayed at 99. These particle measurements are in micrograms per cubic metre. The 08:00 daily PSI remained unhealthy across the reported regions. Local particle improvement can reduce immediate exposure without proving that all transport or service disruptions have ended. The new 08:00 official feeds were independently retrieved; earlier comparisons remain attributed OTR snapshots. No 09:00 observation was claimed.
Key points
- Singapore’s latest local haze readings moved in different directions. The south improved sharply at 08:00 SGT on 13 October, while the north worsened.
- Use the reading for the actual worksite or event, rather than assuming every region matches the island’s highest PSI.
What could change this view?
- Wind, rain and later updates can change the picture. One hourly reversal does not prove lasting improvement. Check the newest local reading and verify service notices separately.
Bottom line
Use the latest local reading for the actual worksite or event; do not infer every region’s exposure from the islandwide worst PSI.
Its source facts and prices still need independent checks.
Terms in simple English
These explanations help you read this signal. The saved forecast, prices, deadline and outcome rules stay the same.
- Bullish
- OTR expects the price to rise during the stated time window. This is a forecast, not a promise.
- Bearish
- OTR expects the price to fall during the stated time window. This is a forecast, not a promise.
- Asset or investible
- Something that can be bought or sold, such as a share, bond, fund, currency or cryptocurrency.
- Share or equity
- A share is a small ownership stake in a company. Its price can rise or fall.
- HIT and MISS
- HIT means the price moved in the recorded direction under that call’s saved rules. MISS means it did not meet those rules. These labels do not measure profit after trading costs.
- Probability
- An estimate of how likely an outcome is. For example, 60% means about six chances in ten, not certainty.
- Bayesian framework
- Updating an earlier belief with new evidence. A posterior is the updated estimate; a likelihood ratio compares how evidence fits outcomes. A subjective estimate may have no tested calculation.
- De Finetti framework
- Keeping probability judgements consistent. Related calls may share evidence, so one story must not count as several independent reasons.
- Kolmogorov framework
- Basic probability rules: chances cannot be negative, and separate possible outcomes together total 100%.
- API
- An application programming interface: a defined way for software services to request information or actions from each other.
- UTC and SGT
- UTC is a world time standard. SGT is Singapore time, eight hours ahead of UTC.
- PSI or PM2.5
- PSI is Singapore’s air-quality index. PM2.5 means very small airborne particles; their concentration differs from the PSI score.
How likely is this call? · Three frameworks
This signal has no investible bullish or bearish call. A market-direction percentage does not apply.
Evidence behind this view
Checks whether separate pieces of evidence support the same view.
OTR Database Data: complete Singapore and source JSON read; earlier 06:00/07:00 PM2.5 historical responses were not independently replayed. New FiveDesk 08:20 Singapore/audit sections compared, which rely on older 06:00 press observations and do not establish a new 08:20 pollution reading. Lead researcher independently refreshed official 08:00 PSI, updated 08:15:51, and 08:00 PM2.5, updated 08:00:52. Regional values and clocks are preserved. Subdesk requests returned403, but lead-researcher API retrieval succeeded. No 09:00 reading was obtained.
What past price moves show
Compares today’s price moves with recorded past patterns.
Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. We do not use price patterns to establish this social or operational outcome.
Evidence against this view
Shows evidence and risks that could challenge this view.
A one-hour split may be noise or short-lived transport. Changing wind and rainfall could reverse it; later API revisions may alter the archived values.
Why the direction changed
Explains recorded changes from expecting a rise to expecting a fall, or the reverse.
Learning review before publication
The supplied direction was retained: No investible directional call.
The supplied synthesis was retained.
Reason: Retain the researched synthesis and original horizon after six complementary reviews. Overlapping events and qualified past results inform evidence discipline, without establishing calibration or numerical likelihoods.
Lessons considered: Keep the clocks separate; Compare matching quantities; Look for independent evidence; Keep incomplete tests visible; Separate direction from explanation; Use lessons in the next call.
This review belongs to the new draft before publication. Earlier published calls and their original deadlines remain unchanged.
What people say vs the facts
Compares recorded public discussion with checked market facts.
We separate a claim of nationwide clearing from the actual regional readings. The southern particle level fell, while the north rose. The 24-hour PSI still showed unhealthy conditions. These readings do not establish how many people changed their plans.
How past forecasts performed
Shows recorded forecast results and what they can teach us.
No matched past forecast outcome was verified for this specific thesis.
The pre-publication learning review is recorded under “Why the direction changed”, including cases where the supplied direction was retained.
Sources, original wording and price checks
Author-submitted research. The underlying facts and market prices have not been independently verified.
Original research record
We connect the OTR data’s earlier regional measurements with the lead researcher’s refreshed official 08:00 SGT readings on 13 October. South one-hour PM2.5 first rose from 76 at 06:00 to107 at 07:00, then fell to65 at 08:00. The latest change therefore reversed the earlier surge. Against 07:00, north rose from 54 to63, east rose from 101 to102, west stayed 99 and central fell from 104 to102 micrograms per cubic metre. This is patchy easing, not uniform clearing or uniform worsening. The refreshed 08:00 daily PSI was north 127, south 134, west 173, east 151 and central 168. We connect these different local paths with OTR data on health support and transport disruption: a local improvement can change immediate exposure without proving all service disruptions are over. Earlier 06:00/07:00 PM2.5 responses are OTR-attributed archived snapshots; the lead researcher independently retrieved both official 08:00 feeds. The PSI was updated 08:15:51 and PM2.5 at 08:00:52. No 09:00 reading is claimed. One hourly reversal does not establish a lasting weather trend.
South PM2.5 reversed its earlier increase: 107 at 07:00 to 65 at 08:00 SGT. North rose from 54 to 63, while west stayed 99: local exposure did not improve uniformly. Use the newest local PM2.5; the rerun now also verifies 08:00 PSI.
A one-hour split may be noise or short-lived transport. Changing wind and rainfall could reverse it; later API revisions may alter the archived values. South PM2.5 reversed its earlier increase: 107 at 07:00 to 65 at 08:00 SGT. North rose from 54 to 63, while west stayed 99: local exposure did not improve uniformly. Use the newest local PM2.5; the rerun now also verifies 08:00 PSI.
Use the latest local reading for the actual worksite or event; do not infer every region’s exposure from the islandwide worst PSI.
Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. Favoured scenario The stated operational development strengthens if its measurable check succeeds; no investment direction applies. Rise scenario Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. We will strengthen the operational thesis if its stated test succeeds. Decline scenario Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. We will weaken the operational thesis if the stated opposing evidence dominates. Neutral Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. An inconclusive check remains unresolved rather than counted as success. Bayesian · what changed the estimate? We revise the explanation when newer evidence changes the proposed cause. Source confidence describes our judgement about support for this synthesis; it is not a price forecast or a tested mathematical result. de Finetti · are the comparisons fair? Related announcements may share one source. Repeated editions do not add independent proof. We test the specific social or practical change described here; investment hit rates do not apply. Kolmogorov · do the numbers agree? No market-price probability applies. Source confidence is a separate judgement, not a bullish, bearish and neutral split.
OTR Database Data: complete Singapore and source JSON read; earlier 06:00/07:00 PM2.5 historical responses were not independently replayed. New FiveDesk 08:20 Singapore/audit sections compared, which rely on older 06:00 press observations and do not establish a new 08:20 pollution reading. Lead researcher independently refreshed official 08:00 PSI, updated 08:15:51, and 08:00 PM2.5, updated 08:00:52. Regional values and clocks are preserved. Subdesk requests returned403, but lead-researcher API retrieval succeeded. No 09:00 reading was obtained.
Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. We do not use price patterns to establish this social or operational outcome.
A one-hour split may be noise or short-lived transport. Changing wind and rainfall could reverse it; later API revisions may alter the archived values.
N/A - no investment direction is assigned
We separate a claim of nationwide clearing from the actual regional readings. The southern particle level fell, while the north rose. The 24-hour PSI still showed unhealthy conditions. These readings do not establish how many people changed their plans.
No matched past forecast outcome was verified for this specific thesis.
How likely is this call? · Three frameworks
Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. Favoured scenario The stated operational development strengthens if its measurable check succeeds; no investment direction applies. Rise scenario Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. We will strengthen the operational thesis if its stated test succeeds. Decline scenario Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. We will weaken the operational thesis if the stated opposing evidence dominates. Neutral Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. An inconclusive check remains unresolved rather than counted as success. Bayesian · what changed the estimate? We revise the explanation when newer evidence changes the proposed cause. Source confidence describes our judgement about support for this synthesis; it is not a price forecast or a tested mathematical result. de Finetti · are the comparisons fair? Related announcements may share one source. Repeated editions do not add independent proof. We test the specific social or practical change described here; investment hit rates do not apply. Kolmogorov · do the numbers agree? No market-price probability applies. Source confidence is a separate judgement, not a bullish, bearish and neutral split.
Bayesian · what changed the estimate?
We revise the explanation when newer evidence changes the proposed cause. Source confidence describes our judgement about support for this synthesis; it is not a price forecast or a tested mathematical result.
de Finetti · are the comparisons fair?
Related announcements may share one source. Repeated editions do not add independent proof. We test the specific social or practical change described here; investment hit rates do not apply.
Kolmogorov · do the numbers agree?
No market-price probability applies. Source confidence is a separate judgement, not a bullish, bearish and neutral split.
Evidence behind this view
OTR Database Data: complete Singapore and source JSON read; earlier 06:00/07:00 PM2.5 historical responses were not independently replayed. New FiveDesk 08:20 Singapore/audit sections compared, which rely on older 06:00 press observations and do not establish a new 08:20 pollution reading. Lead researcher independently refreshed official 08:00 PSI, updated 08:15:51, and 08:00 PM2.5, updated 08:00:52. Regional values and clocks are preserved. Subdesk requests returned403, but lead-researcher API retrieval succeeded. No 09:00 reading was obtained.
What past price moves show
Not applicable: this is a non-investment synthesis, so we make no asset-price directional call. We do not use price patterns to establish this social or operational outcome.
Evidence against this view
A one-hour split may be noise or short-lived transport. Changing wind and rainfall could reverse it; later API revisions may alter the archived values.
Why the direction changed
N/A - no investment direction is assigned
What people say vs the facts
We separate a claim of nationwide clearing from the actual regional readings. The southern particle level fell, while the north rose. The 24-hour PSI still showed unhealthy conditions. These readings do not establish how many people changed their plans.
How past forecasts performed
No matched past forecast outcome was verified for this specific thesis.
Forecast prepared Publication time unverified
No explicit investible BULLISH or BEARISH call on this card.
What changed
Recorded public historyWe connect the OTR data’s earlier regional measurements with the lead researcher’s refreshed official 08:00 SGT readings on 13 October.…
This is the first recorded public view. Further public updates will appear here.
- Haze is easing in some places, but Singapore is not clearing uniformly
We connect the OTR data’s earlier regional measurements with the lead researcher’s refreshed official 08:00 SGT readings on 13 October. South one-hour PM2.5 first rose from 76 at 06:00 to107 at 07:00, then fell to65 at 08:00.
Forecast prepared: 13 Oct, 09:27 SGTPublished by OTR: 13 Oct 2026, 09:40 SGT
Why the view changed
This is the first recorded view. Future source-backed updates will appear here.
Evidence, memory & review 3 linked sources
Directional takeaway: N/A
OTR reasoning: We connect the OTR data’s earlier regional measurements with the lead researcher’s refreshed official 08:00 SGT readings on 13 October. South one-hour PM2.5 first rose from 76 at 06:00 to107 at 07:00, then fell to65 at 08:00. The latest change therefore reversed the earlier surge. Against 07:00, north rose from 54 to63, east rose from 101 to102, west stayed 99 and central fell from 104 to102 micrograms per cubic metre. This is patchy easing, not uniform clearing or uniform worsening. The refreshed 08:00 daily PSI was north 127, south 134, west 173, east 151 and central 168. We connect these different local paths with OTR data on health support and transport disruption: a local improvement can change immediate exposure without proving all service disruptions are over. Earlier 06:00/07:00 PM2.5 responses are OTR-attributed archived snapshots; the lead researcher independently retrieved both official 08:00 feeds. The PSI was updated 08:15:51 and PM2.5 at 08:00:52. No 09:00 reading is claimed. One hourly reversal does not establish a lasting weather trend.
Counterpoint: A one-hour split may be noise or short-lived transport. Changing wind and rainfall could reverse it; later API revisions may alter the archived values. South PM2.5 reversed its earlier increase: 107 at 07:00 to 65 at 08:00 SGT. North rose from 54 to 63, while west stayed 99: local exposure did not improve uniformly. Use the newest local PM2.5; the rerun now also verifies 08:00 PSI.
Source trail
- api-open.data.gov.sg ↗The research record cites this source; its publication time has not been independently verified.
- api-open.data.gov.sg ↗The research record cites this source; its publication time has not been independently verified.
- www.nea.gov.sg ↗The research record cites this source; its publication time has not been independently verified.
Review status: LEARNING REVIEWED WITH DISCLOSED LIMITS
This evidence panel does not assign a score or probability. Any forecast estimate is shown separately with its own source and limitations.
Signals sharing sources
These records are in the same category and cite at least one of the same source documents. Shared evidence is not independent confirmation; each record keeps its own date and conclusion.