The Met Office has warned of travel disruption as gusts of up to 60mph are expected.
It said to expect "very strong and disruptive winds", with gusts of up to 70mph (112km/hr) in some places around the country.
The Yellow Warning in force across Oldham, Rochdale and Tameside comes into force at around 3am on tomorrow (Thursday) and runs until around 3pm on the same day.
It warns that severe south to southwest winds associated with Storm Diana will be strongest from 9am to 2pm on Wednesday with gusts as high as 130km/h in coastal areas.
Meanwhile, there are two orange wind warnings which both kick off in the early hours of tomorrow morning.
This spreads NE through Ireland and the United Kingdom during Wednesday morning rush hour and further rain hits Northern Ireland and Scotland in the afternoon.
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Most of the victims are reported to be schoolchildren, according to local reports. Police officials have reached the spot and relief, rescue work was underway.
Dundee and the local area has been placed under a flood alert as the country braces itself for Storm Diana.
Although mild, it will become very windy everywhere, with gales or severe gales affecting much of the north and west. Rain is likely everywhere, heaviest over Scotland and Northern Ireland. With that, there will be some heavy bursts of rain.
A "major change" in the UK's weather is expected in the coming days as heavy rain and strong winds move in from the Atlantic.
"Our crews are also ready to respond to clear debris from the railway and to operate bus diversions if roads are closed".
A new cyclonic low, which will span 2,000 miles from the north of France to southern Greenland could be strong enough to warrant another name - Deirdre - before the weekend.
Storm Diana is now expected to reach Warrington at 3am on Thursday.