Sun Sat Sun Sat
4-2 4-8 4-9 4-15
41° 51° 35° 53° 40° 40° 52° 45° 42° 42° 47° 48° 53° 49°
25° 36° 30° 35° 31° 29° 30° 39° 35° 33° 33° 36° 38° 41°
Predictability
65% 55% 55% 10% 40% 50% 45% 40% 25% 30% 35% 30% 25% 20%
Temperature ( °F)
Precipitation (in) / Precipitation probability (%)
Sun Sat Sun Sat
25% 25% 65% 100% 35% 5% 5% 10% 35% 40% 15% 15% 25% 40%

This chart shows the 14 day weather trend for Alpena (Michigan, United States) with daily weather symbols, minimum and maximum temperatures, precipitation amount and probability.

  • The deviance is coloured within the temperature graph. The stronger the ups and downs, the more uncertain the forecast will be. The thick line represents the most probable trend.
  • Variation in precipitation is represented as a „T“. These uncertainties usually increase with the number of forecasts days ahead.
  • The forecast is created with „ensemble“ models. Several model runs with varying start parameter are calculated to estimate the predictability of the forecast more precisely.

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