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Snowdonia: forecast uv
Wednesday, 19 June 2013: dawn to dusk
Printable view Forecast issued: 1623 on Wednesday, 19 June 2013
Overview for Thursday
A rather cloudy day across the park with outbreaks of rain developing by late morning. The rain is likely to turn heavy at times, and perhaps persistent in places. Feeling cooler than of late.
| Hazards | Risk | Explanation |
|---|---|---|
| Blizzards | No Risk | |
| Heavy snow | No Risk | |
| Storm force winds | No Risk | |
| Gales | No Risk | |
| Severe chill effect | No Risk | |
| Persistent and extensive hill fog | Medium | Areas of hill fog above 300m developing throughout the afternoon. |
| Thunderstorms | Low | A low risk of lightning during any heavier bursts of rain. |
| Heavy persistent rain | Low | Periods of heavy rain are likely to develop during the day, making some paths and rocks slippery. |
| Strong Sunlight | No Risk |
key to hazards and forecast content
| Dawn to 0900 | 0900 to 1200 | 1200 to 1500 | 1500 to dusk |
 Light rain showers |
 Light rain |
 Heavy Rain |
Light rain showers |
| 30% | 50-70% | 50-70% | 30-50% |
Detailed mountain weather forecast: Snowdonia
Thursday
Weather
After perhaps a bright start in places, it will turn increasing cloudy with outbreaks of rain developing by late morning. The rain is likely to turn heavy at times, and perhaps persistent in places. Feeling cooler than of late.
Visibility
Generally good but becoming moderate to poor in the rain and very poor in hill fog.
Hill fog
Areas of hill fog above 500m developing by midday, gradually lowering and becoming more extensive, with broken layers above 300m likely at times during the afternoon.
Maximum winds above 500m
Southeasterly 20-25mph during the middle of the day.
Temperature
| Valleys | Plus 10 Celsius becoming Plus 20 Celsius. |
| 900 m | Plus 12 Celsius |
| Freezing level | Way above the summits. |
Friday
Weather
Another rather cloudy day with further outbreaks of rain at times, some of which may turn heavier at times.
Visibility
Generally good but moderate to poor in any rain and very poor in hill fog.
Hill fog
Widespread broken hill fog above 200m during the morning, gradually breaking and lifting throughout the afternoon, especially in the east of the park.
Maximum winds above 500m
Westerly 20-25mph
Temperature
| Valleys | Plus 11 Celsius becoming Plus 16 Celsius |
| 900 m | Plus 08 Celsius |
| Freezing level | Above the summits. |
Outlook
Saturday
Staying unsettled on Saturday and also increasing windy with a risk of gales possible on the highest peaks and ridges. Outbreaks of rain will move across the park with perhaps some drier and brighter interludes developing in between.
Sunday
Another cool, unsettled and breezy day with outbreaks of rain or showers across much of the park. Some brighter and drier interludes will develop, especially to the west of the park.
Monday
Remaining rather cool and also rather cloudy throughout the day. However it should be largely dry with any showers staying on the light side. Some bright or sunny spells will develop, especially during the afternoon.
Observations
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The Enhanced Mountain forecast for Snowdonia has been discontinued. All forecast information for these locations can be found in the standard Mountain forecast above.
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