It was after lunch that teachers first got word to be on alert for severe weather.
That morning, weather reports warned of severe weather: high winds, low humidity and extreme fire behavior.
Hennen says that puts another 44 million people under threat of some kind of severe weather.
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Hurricane Sandy is just the latest in a growing number of severe weather events.
However, Network Rail said the recent severe weather had prevented the completion of three new stations.
"It would have to be pretty severe weather" to hold him out again, Weiss said.
Fifteen people were rescued by helicopter after the ship ran aground in severe weather.
The severe weather conditions are still having an impact across many parts of Northern Ireland.
BBC: Deep snow still lying in some areas of Northern Ireland
Josh Wurman, a meteorologist who heads the Center for Severe Weather Research in Boulder, Colo.
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The Sellafield nuclear reprocessing plant has been shut down because of severe weather conditions.
BBC: Sellafield shutdown: Severe weather closes nuclear site
The severe weather season started late in Arkansas because of a chilly March, Robinson said.
The severe weather season started late in Arkansas, according to Robinson, because of a chilly March.
The National Weather Service also reported severe weather or damage Wednesday in Texas, Mississippi and Alabama.
CNN: High winds, tornado trap Georgia residents, turn over cars
About 13, 000 homes are still without electricity in Northern Ireland after 24 hours of severe weather.
BBC: Snow storms: Thousands without power in Northern Ireland
Ukraine is expected to remain gripped by severe weather for the next few days.
Snow gates have been installed on a trans-Pennine road, to improve safety during severe weather.
Severe weather warnings are in place from central Queensland to the New South Wales border.
Administrator Lubchenco discussed the potential for severe weather in the Gulf, which is being closely monitored.
The strong cold front causing the severe weather brought huge extremes in temperature readings.
CNN: High winds, tornado trap Georgia residents, turn over cars
The severe weather is also affecting neighbouring Bulgaria and Romania, where six people have reportedly died.
Increased moisture can fuel an increase in severe weather and tornado activity, particularly in the cool season.
Medication and food have also been delivered by helicopter to people left snowbound by the severe weather.
BBC: Deep snow still lying in some areas of Northern Ireland
Severe weather continued to rip through the South and Midwest that day, killing at least 327 people.
Met Office severe weather warnings remain in place in Wales and western parts of England and Scotland.
The rain is part of a band affecting several Southern states where severe weather also was possible.
An amber warning of severe weather has been issued by the Met Office for the South West.
The Met Office has issued a severe weather warning for heavy snow across the west country on Friday.
The Senior PGA just posted a weather advisory: due to anticipated severe weather, tee times would be delayed.
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Severe weather warnings are in force across the UK, with eight inches (20cm) of snow forecast in places.
Royal Mail said staff "pulled out all the stops" but the continuing severe weather conditions were to blame.
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