Storm Doris is expected to bring heavy rain and gales across Welwyn Hatfield all day.
Across Welwyn Garden City and Hatfield it is expected to be very windy with gales throughout the day.
The Met Office forecasts a top temperature of 10 degrees C and a minimum of 2 degrees C in the borough.
Tonight showers are likely to continue.
Tomorrow it is expected to be a cold morning, with sunny spells and any showers easing.
Saturday to Monday the Met Office has said it will be cloudy across the borough, mild but windy on Saturday, with some rain possible.
Sunday is said to be mostly dry but cloudy.
Rain is predicted for Monday morning.
Highways England tweeted a warning to drivers this morning to encourage them to rethink their travel plans following Storm Doris.
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