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Rain Watch

The GFS (left side) charts are sometimes unavailable due to problems at COLA.
Click here for an alternative from Georg Mueller's Wetterzentrale.

Forecast rainfall for the next two weeks and the variation from normal for the first week. Current estimated soil moisture, and forecast change in the next week
GFS forecast for Day 1 GASP analysis and forecast for Day 1 LAPS forecast for Day 1 MesoLAPS forecast for Day 1
GFS forecast for Day 2 GASP forecast for Days 2 and 3 LAPS forecast for Day 2 MesoLAPS forecast for Day 2
GFS forecast for Day 3 LAPS forecast for Day 3
GFS -- Day 4 GASP forecast for Days 4 and 5    
GFS -- Day 5    
GFS -- Day 6 GASP forecast for Days 6 and 7    
     

These panels show forecast daily rainfall patterns in millimetres from four different models. GFS and GASP are medium range models and forecast for up to a week ahead. LAPS and MesoLAPS are short range models. The two charts at the top show forecast total rainfall and soil moisture changes for the next week and an early forecast of rainfall for the following week.

Be very careful to check the times and dates for which each model is valid. They are all run twice daily, based on data at midnight UTC (10am EST) and midday UTC (10pm EST). The times and dates on the charts are UTC. LAPS and MesoLAPS are updated between 12 and 2am and pm. GFS and GAPS are updated around 5am and 5pm. I have tried to align charts for the same periods, but they may be misaligned because of the different update times.

The layout of the charts is shown at right. You will need to use your horizontal slider bar to see them all. As a rule of thumb, the greater the agreement between the models, the more likely the forecast is to be accurate.