MeteoFrontier · Freezing rain and ice storms

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Map

Model

Layer

wet-bulb 0 °C line airport labels

Airport

—Pick an airport on the map or in the watch list

Timeline: precipitation type and ice

Ingredients checklist

Sounding: warm nose and refreezing layer

Models, FRONTIER and observations

Ensembles (REPS / GEFS)

Aviation notes

Watch list highest potential, any model

How to use this page two minutes

Start with the watch list or the map's P(FZRA) layer: where is freezing rain possible in the next two days, and in which model?
Switch to Accumulated ice to see how much radial ice could build up on wires and branches if it happens (FRAM method, from the run start).
Check the ingredients: a warm nose aloft above 0 °C, a shallow refreezing layer, ground at or below 0 °C and steady precipitation. All four together make freezing rain; a deep or very cold refreezing layer gives ice pellets instead.
Open the airport's sounding to see the warm nose and the refreezing layer, then compare models (Model disagreement layer) and the ensembles.
Read the aviation notes for TAF wording, de-icing and in-flight icing (SLD) hints. Every "?" opens an explainer.

Ice storm potential levels (None, Low, Moderate, High, Severe) come from documented thresholds, shown in the explainers. All of it is experimental guidance from our own diagnostics of the model runs, not an official warning or forecast.

Methods and verification

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Glossary

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