How many Major Atlantic Hurricanes will occur in the 2026 Atlantic hurricane season?

## Cross-Market Signals

### No signal found

1. [sq1 | article_search | STRONG cred 88 | DOWN | VERY_RECENT] As of September 4, 2026, no Atlantic hurricane had formed; the hurricane-free streak was about to set a record for latest first hurricane.
2. [sq1 | article_search | STRONG cred 90 | DOWN | VERY_RECENT] Five named storms (Arthur, Bertha, Cristobal, Dolly, Edouard) had formed by September 1, all short-lived tropical storms, none reaching hurricane strength.
3. [sq1 | article_search | STRONG cred 85 | DOWN | VERY_RECENT] Atlantic accumulated cyclone energy was running at roughly 11% of average as of August 30, 2026.
4. [sq2 | article_search | STRONG cred 92 | DOWN | RECENT] NOAA's August 6 update lowered its major hurricane range from 1-3 to 0-2 and raised below-average season odds to 75%.
5. [sq2 | article_search | STRONG cred 90 | DOWN | RECENT] NOAA CPC gives >90% odds of a very strong El Niño and 69% odds it exceeds all events since 1950 during Oct-Dec 2026.
6. [sq1 | article_search | MODERATE cred 80 | NEUTRAL | RECENT] Mid-August to mid-October is the climatological peak window; the season peak is September 10, so roughly two months of active season remained as of early September.
7. [sq1 | article_search | WEAK cred 70 | NEUTRAL | DATED] NHC's Rhome cautioned that El Niño seasons can still produce dangerous storms and the public should not underestimate 2026.
8. [sq1 | code_execution | MODERATE cred 82 | UP | VERY_RECENT] Across 1990-2025, only 2 of 36 seasons (1994, 2013) had zero major hurricanes; P(>=1) was 94%.
9. [sq2 | code_execution | MODERATE cred 78 | NEUTRAL | VERY_RECENT] Among 14 quiet/El Niño analog seasons, major hurricane counts were 0 (2x), 1 (3x), 2 (9x); analog P(>=2) = 64%, mean 1.5.
10. [sq3 | code_execution | MODERATE cred 78 | DOWN | VERY_RECENT] None of the 14 analog quiet seasons produced 3 or more major hurricanes; Poisson fits matching NOAA's 0-2 range give P(>=3) of 4-14%.
11. [sq4 | code_execution | MODERATE cred 75 | DOWN | VERY_RECENT] Poisson fits consistent with NOAA's 70% 0-2 outlook (lambda 0.8-1.6) imply P(>=4) of roughly 1-8%.
12. [sq1 | article_search | MODERATE cred 82 | DOWN | VERY_RECENT] The eastern/central Pacific was highly active (three simultaneous hurricanes, Hurricane Lala hitting Hawaii), consistent with El Niño suppressing Atlantic activity.

## Cross-Market Signals

### No signal found

Information gaps:
  - No status data after September 7, 2026; unknown whether any hurricane/major formed in Sept-Oct
  - No conditional base rate: major hurricane counts in seasons with zero hurricanes by ~Sept 5
  - No late-season (Oct-Nov) major hurricane frequency for strong El Niño years
  - No CSU/TSR September forecast updates or current SST/shear/MJO conditions

Key uncertainties:
  - Whether an unusually late-season Caribbean/Gulf major forms in October (e.g., 2023 Otis-type or 2016 Matthew-type events)
  - Whether NOAA's 0-2 range is already too high given near-record inactivity through the peak
  - Real-time upgrades vs post-season reanalysis (only Dec 1 NHC data counts)
  - Record El Niño strength possibly suppressing activity beyond historical analogs

You are an elite superforecaster. Estimate the probability of each option for this Metaculus multiple-choice question.

## Question
How many Major Atlantic Hurricanes will occur in the 2026 Atlantic hurricane season?

## Description / Resolution Criteria
## Description
The Atlantic hurricane season runs from June 1 to November 30, with peak activity occurring in August, September, and October. Major hurricanes, classified as Category 3 or higher on the [Saffir-Simpson Hurricane Wind Scale](https://www.nhc.noaa.gov/aboutsshws.php), have sustained wind speeds of at least 111 miles per hour (178 km/h) and can cause significant damage and loss of life.

As of August 2026, no major hurricanes have taken place during the 2026 season, with only 4 named storms and a total [accumulated cyclone energy](https://en.wikipedia.org/wiki/Accumulated_cyclone_energy) of only 3.2.

On August 6, [NOAA released](https://www.cpc.ncep.noaa.gov/products/outlooks/hurricane.shtml) a forecast of a 70% probability for the following ranges:

* 7-13 Named Storms, including the 2 named storms that had been recorded to that point
* 2-6 Hurricanes
* 0-2 Major Hurricanes
* Accumulated Cyclone Energy (ACE) range of 30-90% of the median, including the 3% that had been recorded to that point

If fewer than 2 Major Hurricanes occur, it would be the fewest since 2013.

## Resolution Criteria
This question will resolve as the number of major Atlantic hurricanes that occur between June 1, 2026, and November 30, 2026, inclusive, as reported by the [National Hurricane Center (NHC)](https://www.nhc.noaa.gov/?atlc) of the United States National Weather Service on December 1, 2026.

## Fine Print
The question will be resolved using storm reports and data published by the National Hurricane Center as of December 1, 2026. Any subsequent revisions upgrading or downgrading a storm's intensity will not be considered. The NHC [Tropical Cyclone Advisory Archive](https://www.nhc.noaa.gov/archive/2024/) and [Monthly Atlantic Tropical Weather Summary](https://www.nhc.noaa.gov/text/MIATWSAT.shtml) may be used.

## Options
  - 0
  - 1
  - 2
  - 3
  - 4+

## Sub-question decomposition (planner)
- (w=0.30) Will at least 1 major (Category 3+) Atlantic hurricane occur in the 2026 season per NHC data as of December 1, 2026?  — Separates the 0 bucket (rarest historically, only 1994 and 2013 since 1990) from all others; a slow start plus NOAA's 0-
- (w=0.30) Will at least 2 major Atlantic hurricanes occur in the 2026 season per NHC data as of December 1, 2026?  — This is the modal threshold: 2 majors is the most common outcome in quiet seasons (2002, 2006, 2007, 2009, 2012, 2014, 2
- (w=0.25) Will at least 3 major Atlantic hurricanes occur in the 2026 season per NHC data as of December 1, 2026?  — Exceeding NOAA's 0-2 outlook range requires an active September-October; determines the upper buckets.
- (w=0.15) Will at least 4 major Atlantic hurricanes occur in the 2026 season per NHC data as of December 1, 2026?  — Tail outcome; 4+ majors in a season that had zero through early August is historically rare but not impossible (late-sea

## Synthesized evidence
1. [sq1 | article_search | STRONG cred 88 | DOWN | VERY_RECENT] As of September 4, 2026, no Atlantic hurricane had formed; the hurricane-free streak was about to set a record for latest first hurricane.
2. [sq1 | article_search | STRONG cred 90 | DOWN | VERY_RECENT] Five named storms (Arthur, Bertha, Cristobal, Dolly, Edouard) had formed by September 1, all short-lived tropical storms, none reaching hurricane strength.
3. [sq1 | article_search | STRONG cred 85 | DOWN | VERY_RECENT] Atlantic accumulated cyclone energy was running at roughly 11% of average as of August 30, 2026.
4. [sq2 | article_search | STRONG cred 92 | DOWN | RECENT] NOAA's August 6 update lowered its major hurricane range from 1-3 to 0-2 and raised below-average season odds to 75%.
5. [sq2 | article_search | STRONG cred 90 | DOWN | RECENT] NOAA CPC gives >90% odds of a very strong El Niño and 69% odds it exceeds all events since 1950 during Oct-Dec 2026.
6. [sq1 | article_search | MODERATE cred 80 | NEUTRAL | RECENT] Mid-August to mid-October is the climatological peak window; the season peak is September 10, so roughly two months of active season remained as of early September.
7. [sq1 | article_search | WEAK cred 70 | NEUTRAL | DATED] NHC's Rhome cautioned that El Niño seasons can still produce dangerous storms and the public should not underestimate 2026.
8. [sq1 | code_execution | MODERATE cred 82 | UP | VERY_RECENT] Across 1990-2025, only 2 of 36 seasons (1994, 2013) had zero major hurricanes; P(>=1) was 94%.
9. [sq2 | code_execution | MODERATE cred 78 | NEUTRAL | VERY_RECENT] Among 14 quiet/El Niño analog seasons, major hurricane counts were 0 (2x), 1 (3x), 2 (9x); analog P(>=2) = 64%, mean 1.5.
10. [sq3 | code_execution | MODERATE cred 78 | DOWN | VERY_RECENT] None of the 14 analog quiet seasons produced 3 or more major hurricanes; Poisson fits matching NOAA's 0-2 range give P(>=3) of 4-14%.
11. [sq4 | code_execution | MODERATE cred 75 | DOWN | VERY_RECENT] Poisson fits consistent with NOAA's 70% 0-2 outlook (lambda 0.8-1.6) imply P(>=4) of roughly 1-8%.
12. [sq1 | article_search | MODERATE cred 82 | DOWN | VERY_RECENT] The eastern/central Pacific was highly active (three simultaneous hurricanes, Hurricane Lala hitting Hawaii), consistent with El Niño suppressing Atlantic activity.

## Cross-Market Signals

### No signal found

Information gaps:
  - No status data after September 7, 2026; unknown whether any hurricane/major formed in Sept-Oct
  - No conditional base rate: major hurricane counts in seasons with zero hurricanes by ~Sept 5
  - No late-season (Oct-Nov) major hurricane frequency for strong El Niño years
  - No CSU/TSR September forecast updates or current SST/shear/MJO conditions

Key uncertainties:
  - Whether an unusually late-season Caribbean/Gulf major forms in October (e.g., 2023 Otis-type or 2016 Matthew-type events)
  - Whether NOAA's 0-2 range is already too high given near-record inactivity through the peak
  - Real-time upgrades vs post-season reanalysis (only Dec 1 NHC data counts)
  - Record El Niño strength possibly suppressing activity beyond historical analogs

## Required pre-forecast walkthrough

Before giving probabilities, address these explicitly in your rationale:
  (a) The time left until the question resolves.
  (b) The status quo outcome — the option most likely if nothing changes from today.
  (c) An outcome that would be SURPRISING but plausible.

## Calibration guidance

- **Status quo anchoring.** Good forecasters put extra weight on the status quo option because the world changes slowly most of the time.
- **Leave moderate probability on most options.** Good forecasters don't drop options to ~0% — leave ≥3-5% on every option to account for unexpected outcomes, unless you have strong specific evidence ruling them out.
- Avoid uniform-distribution laziness — most options are not equally likely.
- **Anchor on prediction markets.** If liquid market prices (Polymarket / Kalshi) for these options appear in the evidence, treat them as a strong prior and stay close to them absent specific contrary evidence.

## Output

Return ONLY valid JSON, no markdown fences:

{
  "rationale": "<address (a) (b) (c) above, then explain your distribution — 4-7 sentences total>",
  "probabilities": {
    "0": <prob>,
        "1": <prob>,
        "2": <prob>,
        "3": <prob>,
        "4+": <prob>
  }
}

Probabilities MUST sum to ~1.0 (renormalization is applied; close enough is fine).