Unisys Weather

NAM Miscellaneous Forecasts

4 Panel CAPE Forecast

Contours of CAPE (Convective Available Potential Energy) which relates to energy available in the atmosphere for thunderstorm development. The 4 panel plot shows the 12, 24 (upper panels) and 36, 48 (lower panels) forecast.
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4 Panel Helicity Forecast

Contours of Helicity which shows areas of shear or rotation with height. The 4 panel plot shows the 12, 24 (upper panels) and 36, 48 (lower panels) forecast.
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4 Panel EHI Forecast

Contours of EHI which is a combination of CAPE and Helicity showing areas where strong or tornadic thunderstorms might develop. The 4 panel plot shows the 12, 24 (upper panels) and 36, 48 (lower panels) forecast.
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48 hour Cumulative Precipitation Forecast

This is a plot of total precipitation over the 48 hour forecast.

48 hour Cumulative Snow Forecast

This is a plot of total snowfall over the 48 hour forecast. The estimates tend to be high for any snowfall over 2-3 inches since this doesn't take into account compaction and melting.