Unverified50% confidenceFactExact time
Weather forecasts within ten days are already fairly reliable, but the two-to-six-week window that follows remains a major challenge for forecasting models.
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50%
Confidence
Long-term
Relevance
10/29/2026
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Related Claims
UnverifiedTraditional numerical models often can only give 'skill-less' forecasts close to the climatological mean state in the 2-6 week subseasonal time window.72% similarUnverifiedThe 2-6 week subseasonal timescale is recognized by the meteorological community as the "forecast desert" and is a recognized difficulty in international meteorological research.71% similarVerifiedThe upper time limit for deterministic weather forecasting is generally considered to be approximately two weeks69% similarUnverifiedThe meteorological community typically divides forecasts by timescale into three categories: medium-range weather forecasting (about 0-15 days), subseasonal forecasting (about 15 days to 60 days), and seasonal climate prediction (months to more than a year).63% similar
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