Subseasonal Forecasts

Subseasonal forecasts of precipitation and temperature.

This section is dedicated to subseasonal forecasts, i.e. that bridge the gap between medium range weather forecasts (up to 10 days) and seasonal climate predictions (above a month). They are issued at different frequencies (from daily to once or twice a week) forecasting daily values with lead times from 1 to about 40 days, depending on the Global Producing Center (GPC). The availability of forecast products in the subseasonal-to-seasonal time range offers an unprecedented opportunity to develop intra-seasonal forecast information that other forecasts can't, in association with increased lead time compared to medium range weather forecasts, and with higher temporal resolution than seasonal forecasts that give an overview of an upcoming seasons (3 months). For instance, subseasonal forecasts may allow delivering relevant information about key climate characteristics such as the timing of the onset of a rainy season for agriculture, the risk of extreme rainfall events or heat waves in regards to public health.

At present, these maprooms include experimental subseasonal forecasts of weekly and biweekly precipitation and temperature (terciles and above median) based on the multi-model ensemble of individual forecasts issued every Saturdays through the SubX real-time database and every Thursday through the delayed S2S database.

SubX Forecasts
Calibrated Subseasonal Two-category precipitation real-time forecasts
Calibrated Subseasonal tercile category biweekly-precipitation forecasts
Calibrated Subseasonal Two-category temperature real-time forecasts
Calibrated subseasonal tercile categories temperature forecasts
Calibrated Subseasonal Tercile categories precipitation real-time forecasts
Calibrated subseasonal tercile categories temperature forecasts
Subseasonal tercile categories temperature forecasts with pattern-based calibration
This subseasonal forecasting system consists of probabilistic precipitation forecasts based on the full estimate of the probability distribution.
This subseasonal forecasting system consists of probabilistic temperature forecasts based on the full estimate of the probability distribution.
SubX Hindcast Skill
Subseasonal skill score based on the historical performance of each calibrated SubX model and their 3-model ensemble.
Subseasonal skill score based on the historical performance of each calibrated SubX model and their 3-model ensemble.
S2S Lagged Forecasts
Calibrated Subseasonal Tercile categories precipitation forecasts lagged behind real time
Subseasonal skill score based on the historical performance of each model and their multi-model ensemble.