In uk.sci.weather on Mon, 22 Sep 2003 at 12:40:50, Mag wrote :

Amazing drop in temperature here as the rain moved in. About 5 minutes ago
the thermometer was recording a warm 19.8c, now it is showing 13.6c. A drop
of 6.2c. Heavy rain has started to set in and it's gone very dark. Barometer
showing 998 mb.

The CF crossed here at 1.35pm - dropped from 21.3C to 16.5C in under 10
mins - fell down to 12.2C by 3.35pm. Not that much rain though - around
4mm.
--
Paul Hyett, Cheltenham, England