Day 1 of 5 (0600 Friday 25th July to 0600 Saturday 26th July)

1. General Forecast - SEPD Region
A very warm day again with sunny periods. Predominantly dry, but there is the chance of a few showers developing, especially during the afternoon. The showers are most likely in the
south and east, and one or two could be heavy and potentially thundery - frequent lighting is possible in the most active showers. During the evening any showers will die away, leaving a
dry night with clear skies.
Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust
10 NE 25 10 NE 25 10 NE 25 10 E 25
10 NE 25 15 NE 25 10 NE 25 10 NE 25
5 N 15 10 NW 15 10 N 15 5 N 15
10 N 15 15 N 15 10 N 10 10 N 10
Snow (cm) Line Icing Height (m) Snow (cm) Line Icing Height (m) Snow (cm) Line Icing Height (m) Snow (cm) Line Icing Height (m)
0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A
0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A
Area
North East North West South East South West
Slough and West London Oxford, Reading & Melksham Aldershot & Portsmouth Poole & New Forest
Risk (RAG) Amber Green Amber Amber
Temp (Max/Min) 27 14 27 13 27 14 27 14
Wind
06h-12h
12h-18h
18h-00h
00h-06h
Rain (mm)
06h-18h 0 - 5.0 0 - 3.0 0 - 6.0 0 - 5.0
18h-06h 0 - 1.0 0 - 1.0 0 - 2.0 0 - 2.0
Snow/Line Icing
06h-18h
18h-06h
Lightning
06h-18h 2B 2C 2B 2B
18h-06h 3 3 3 3
Scheduled Utilities Forecast - SEPD (South) - Friday 25 Jul 2014
Day 1 of 5 (0600 Friday 25th July to 0600 Saturday 26th July)

2. General Forecast - SEPD Region
A dry day is expected with long sunny periods. Very warm or hot once again. Clear skies overnight.
Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust
10 NW 20 10 N 20 10 W 15 10 NW 15
5 W 20 10 NW 20 10 W 20 10 W 20
10 NW 10 10 NW 15 10 NW 15 10 NW 15
10 NW 20 10 N 20 10 N 20 10 NW 20
Snow (cm) Line Icing Height (m) Snow (cm) Line Icing Height (m) Snow (cm) Line Icing Height (m) Snow (cm) Line Icing Height (m)
0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A
0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A
Area
North East North West South East South West
Slough and West London Oxford, Reading & Melksham Aldershot & Portsmouth Poole & New Forest
Risk (RAG) Green Green Green Green
Temp (Max/Min) 28 14 28 14 28 14 28 14
Wind
06h-12h
12h-18h
18h-00h
00h-06h
Rain (mm)
06h-18h 0 - 0 0 - 0 0 - 0 0 - 0
18h-06h 0 - 0 0 - 0 0 - 0 0 - 0
Snow/Line Icing
06h-18h
18h-06h
Lightning
06h-18h 4 4 4 4
18h-06h 4 4 4 4
Day 2 of 5 (0600 Saturday 26th July to 0600 Sunday 27th July)

3. General Forecast - SEPD Region
A less warm day with sunny spells and the chance of
the odd shower in places. Isolated showers possible
overnight too.
General Forecast - SEPD Region
Variable cloud with the chance of a few showers. Drier
overnight.
General Forecast - SEPD Region
A dry and mostly fine day with sunny periods. Warm.
Clear spells overnight.
Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust
15 W 25 15 N 25 15 N 25
Snow (cm) Line Icing Height (m) Snow (cm) Line Icing Height (m) Snow (cm) Line Icing Height (m)
0.0 Nil N/A 0.0 Nil N/A 0.0 Nil N/A
Day 3 of 5 (0600 Sunday 27th July to 0600 Monday
28th July)
Day 4 of 5 (0600 Monday 28th July to 0600 Tuesday
29th July)
Day 5 of 5 (0600 Tuesday 29th July to 0600
Wednesday 30th July)
Area
Day Three Day Four Day Five
SEPD Region SEPD Region SEPD Region
Risk (RAG) Green Green Green
Temp (Max/Min) 25 12 23 13 25 12
Wind
24 hours
Rain (mm) 24 hour total 24 hour total 24 hour total
24 hours 0 - 2 0 - 3 0 - 0
Snow/Line Icing
24 hours
Lightning
24 hours 3 3 4
Days 6 to 10 (0600 Wednesday 30th July to 0600 Monday 4th August)
Outlook
A ridge of high pressure extending across England from the south-west should give largely dry and settled conditions through the period. It will often be warm.

4. Rainfall (mm)
12 hr (days 1 and 2) 24 hr (days 3 to 5)
>50 >50
>=25 >25
<25 <=25
Snowfall (cm)
12 hr (days 1 and 2) 24 hr (days 3 to 5)
if 24hr total >=10 >=3 >=5
>1 >=1
<=1 <1
if 24hr total >=5 >1
<=1
if 24hr total <5 any amount
Overall risk of disruption
Severe risk Red
Significant risk Amber
No risk Green
The above reflects the worst case of any of the following
Wind Gusts (mph) - 1st November - 31st March
Direction N/NE/E All other directions
>50 mph Red >70 mph Red
>40 mph Amber >50 mph Amber
<=40 mph Green <=50 mph Green
Wind Gusts (mph) - 1st April - 31st October
Direction N/NE/E All other directions
>40 mph Red >60 mph Red
>30 mph Amber >40 mph Amber
<=30 mph Green <=40 mph Green

5. Line icing
12 hr (days 1 and 2) 24 hr (days 3 to 5)
Severe Severe
other 12hr > Nil Moderate Moderate
other 12hr = Nil Moderate Slight
Slight Nil
Nil
Lightning risk and disruption colour code matrix
Risk level 1 A B C D
Risk level 2 A B C D
Risk level 3 A B C D
Risk level 4 A B C D
Lightning Risk Categories
1 - Lightning will almost certainly occur across the region, or is occurring
2 - Lightning is likely across the region
3 - Lightning is unlikely across the region, although convective activity or an active front is forecast
4 - Lightning is not expected to occur across the region
Lightning Intensity Index
A - Very frequent lightning strikes
B - Frequent lightning strikes
C - Infrequent lightning strikes
D - Very infrequent lightning strikes
All Temperatures in °C
All Wind speeds in MPH