Why are there letters near some fronts/centres on Bracknell charts ?
(thanks to Martin Stubbs for this and the following answer.) A. To identify the more important pressure centres, and their associated fronts on actual (ASXX) and forecast (FSXX) output from Bracknell (EGRR) synoptic charts, a system of letters is used (see below). This is useful for internal Met. Office use, as the Chief Forecaster in the National Meteorological Centre (NMC) can identify such features within the written guidance issued to Weather Centres. These identification letters also enable other users of charts to follow features from chart to chart, hence the inclusion of these letters on the charts published in some of our newspapers. The letters are normally assigned in alphabetical order as the pressure feature in question either appears from the west (or elsewhere), or develops in situ. A pressure centre (high or low) will usually carry the same letter throughout its ‘life’ within the area of primary interest (roughly between 50W and 30E, and 70N and 35N), although when a ne
