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Discussed in the following Daily reports: |
Picture
1. Impact
A Channel cyclone referenced named "Egon" by the Free University of Berlin, delivered some snow disruption across SE England on the evening of 12 January, with areas S of London apparently most affected, and also, more significantly, some extreme winds in the English Channel, over NE France, and to a lesser extent further east. 330,00 homes were left without power in France.
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IR sequence. Note fingers of cold top cloud projecting forward from the tip of the cloud head, near to 50N, which is commonly a symptom of a sting jet.
Radar sequence at 25min intervals for mid afternoon. Low is in the Channel moving east, with cold air on the N flank. Red dot is ECMWF.
Some French warnings on meteoalarm were updated from amber to red mid afternoon. It looks as though there were previously no wind warnings in operation in NE France, but this is wrong and is due to a 'bug' in the meteoalarm map display.
3. Predictability
3.1 Data assimilation
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