The forecast predicts generally dry and warm conditions for the region over the next few days, with sunny periods and temperatures reaching the mid-twenties. There is a small chance of isolated showers developing. Overnight will remain dry with clear spells. From Friday onwards, conditions may become more unsettled with an increased risk of heavier showers or spells of rain, though confidence in these forecasts is currently low.

1. General Forecast - SEPD Region
Largely dry today with sunny periods, hazy at times, and it will become very warm or hot. There is just the small chance of an isolated shower breaking out. Mainly dry with clear spells
overnight. However, a cold front will cross the region after midnight, bringing the risk of one or two showers, particularly across northern parts.
Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust
10 N 20 10 N 20 10 W 20 10 NW 20
5 W 20 10 NW 20 10 W 20 10 W 15
10 NW 10 10 NW 15 10 NW 15 10 NW 15
10 NW 20 10 N 15 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) 29 14 28 14 28 15 28 15
Wind
06h-12h
12h-18h
18h-00h
00h-06h
Rain (mm)
06h-18h 0.1 - 1.4 0 - 0.5 0 - 0.3 0 - 0.2
18h-06h 0.1 - 1.7 0 - 1.3 0 - 1.2 0 - 0.8
Snow/Line Icing
06h-18h
18h-06h
Lightning
06h-18h 3 3 3 3
18h-06h 3 3 3 3
Scheduled Utilities Forecast - SEPD (South) - Saturday 26 Jul 2014
Day 1 of 5 (0600 Saturday 26th July to 0600 Sunday 27th July)

2. General Forecast - SEPD Region
Bright with sunny spells and the chance of an isolated shower, particularly at first in the east. Not as warm as of late. Clear spells overnight, but the increasing chance of the odd shower as
a weakening front pushes south.
Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust
10 W 20 10 NW 20 15 W 20 15 W 20
10 NW 20 15 W 20 15 W 25 15 W 25
5 NW 15 10 NW 20 10 NW 25 5 NW 25
10 NE 10 15 NE 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) Green Green Green Green
Temp (Max/Min) 24 12 23 11 24 12 24 12
Wind
06h-12h
12h-18h
18h-00h
00h-06h
Rain (mm)
06h-18h 0 - 0.5 0 - 0.5 0 - 0 0 - 0
18h-06h 0 - 1.1 0 - 0 0 - 0 0 - 1.0
Snow/Line Icing
06h-18h
18h-06h
Lightning
06h-18h 3 3 3 3
18h-06h 3 3 3 3
Day 2 of 5 (0600 Sunday 27th July to 0600 Monday 28th July)

3. General Forecast - SEPD Region
Sunny intervals, but scattered heavy and potentially
thundery showers could break out. However,
confidence is currently low as to the likely distribution
and intensity of the showers and the associated
lightning risk. A little cooler than Sunday. Showers
should fade away during the evening, leaving it mostly
dry with clear spells overnight.
General Forecast - SEPD Region
Mostly dry with sunny spells and variable amounts of
cloud, and it will be warmer with temperatures rising
into the mid-twenties. However, there is the chance of
the odd shower. Dry overnight with clear spells.
General Forecast - SEPD Region
Dry and warm with sunny spells and variable amounts
of cloud. Dry with clear spells overnight.
Mean Dir'n Gust Mean Dir'n Gust Mean Dir'n Gust
15 N 25 20 N 25 20 W 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 Monday 28th July to 0600 Tuesday
29th July)
Day 4 of 5 (0600 Tuesday 29th July to 0600
Wednesday 30th July)
Day 5 of 5 (0600 Wednesday 30th July to 0600
Thursday 31st July)
Area
Day Three Day Four Day Five
SEPD Region SEPD Region SEPD Region
Risk (RAG) Green Green Green
Temp (Max/Min) 23 12 25 12 25 12
Wind
24 hours
Rain (mm) 24 hour total 24 hour total 24 hour total
24 hours 0 - 11 0 - 1 0 - 0
Snow/Line Icing
24 hours
Lightning
24 hours 2C 3 4
Days 6 to 10 (0600 Thursday 31st July to 0600 Tuesday 5th August)
Outlook
Thursday should be mostly dry, settled and warm with nothing more than the odd shower. It then looks set to turn unsettled from Friday as an upper level trough swings south and disrupts
over the UK. Showers or longer spells of rain are likely, potentially heavy and thundery in nature. Confidence is low, however.

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