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Snow forecasting - Weather Prediction Center

Snow forecastingHydro-meteorological Prediction CenterAnother inch with the vort!Snow forecasting Things to think about when forecastingsnow and snowfall amounts How to forecast precipitation type snowfall accumulations A few empirical forecast techniques Synoptic and mesoscale aspects of heavysnow Case studiesForecasting snow requires knowledge of the numerical models must resolve which model has best storm track knowledge of whether the pattern the model isforecasting favors a major snowstorm or a minorone. an assessment of whether the model is handlingthe mesoscale structure correctly. knowledge of the model low-level temperaturebiases. For example, the models often warm the low leveltemps too quickly across northern MaineTo forecast snowfall amounts1-- Need to forecast liquid equivalent (qpf)2-- Determine rain/snow line, precipitation type3-- Then determine whether surface temperature will allow snow to accumulate4-- Finally, predict snow to liquid equivalent ratioThe physical reasons thatdetermine the amount of snowthat falls over any location are The vertical t

1000 2000 3000 4000 5000 freezing rain ice c pellets o) from sounding layer depth (m) 1. identify depth of warm layer (above 0oc) 2. identify the mean temperature of the warm layer 3. then , find coordinate on the chart above, the yellow area usually …

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  Chart, 2000, Snows, 1000, Forecasting, Snow forecasting, 1000 2000

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