Concluding remarks
• Very busy forecast period with heavy rains in the SE
preceding the Nor’easter, plus major rain event in
southern CA.
• Events handled well overall, except for east coast megaopolis.
• Difficult forecast situation:  split flow / blocking
• Models indicated east coast storm a week ahead
• Given uncertainty in model guidance, very good
consistency in HPC storm forecasts day-to-day
• Forecast uncertainty apparent in the model runs and
mentioned in HPC narrative products
• Uncertainty not well perceived by the public
• Accuracy of precipitation forecasting has improved
significantly, but still much room for improvement
• Public expectations increasing faster than forecast
accuracy