Geoscience Reference
In-Depth Information
Table 10.2
Percentage of the annual rainfall (1956 to 1960) occurring with different synoptic situations.
Station
Synoptic categories
Warm Warm
Cold
Occlusion Polar
mP
cP
Arctic
Thunderstorm
front
sector
front
low
Cwm Dyli (99 m)
*
18
30
13
10
5
22
0.1
0.8
0.8
Squires Gate (10 m)†
23
16
14
15
7
22
0.2
0.7
3
Rotherham (21 m)‡
26
9
11
20
14
15
1.5
1.1
3
Notes
:
*
Snowdonia.
†On the Lancashire coast (Blackpool).
‡In the Don Valley, Yorkshire.
Source
: After Shaw (1962), and R. P. Mathews (unpublished).
Figure 10.6
Distribution of thunderstorms over western Europe during the period 19 to 21 August 1992 (storms shown for the four-
hour period preceding the times given). A small depression formed over the Bay of Biscay and moved eastward along the boundary
of warm air, developing a strong squall line.
Source
: Blackall and Taylor (1993). Reprinted from the
Meteorological Magazine
(Crown copyright ©) by permission of the Controller of Her
Majesty's Stationery Office.
