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Heavy rain will affect Northern Ireland later on Thursday. This will fall onto saturated ground and is likely to lead to flooding in places; delayed travel may well result, including through the busy evening period. It is possible that a few properties or businesses could also be affected.
Rain will spread into Northern Ireland on Thursday morning, turning persistent and occasionally heavy in the afternoon and lasting well into the evening before dying out. 20 to 40 mm of rain within 12 hours, (perhaps nearer 60 mm over the Mournes) falling on already very wet ground, seems likely to lead to flooding of some prone locations.
Widespread fog will be dense in places this morning,with visibilities locally of less than 50 m, giving difficult driving conditions and prolonging journeys.
Moist air pushing up from the south has led to the formation of widespread mist and fog. Whilst visibilities will be more than 100 or 200 m for the most part, locally they are less than 50 m. Conditions will gradually improve this morning.
A spell of strong southwesterly winds is expected. Some coastal routes and communities are likely to be affected by large waves, with potential for flooding of properties. Some transport disruption is likely across the warning area, with delays to road, rail, air and ferry transport. Short term loss of power and other services is also possible.
An intense low pressure system is expected to bring a swathe of strong southwesterly winds over southern areas early on Saturday, these steadily transferring east through the morning and early afternoon, becoming westerly and eventually northwesterly later whilst also slowly easing. Gusts exceeding 50 mph are expected widely within the warning area, with gusts of around 70 mph along exposed coastal areas. These are expected to coincide with high tides, leading to locally dangerous conditions.
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