The low "Ignatz" brings violent squalls to Lower Saxony on Thursday.
The German Weather Service (DWD) expects wind speeds of 100 to 105 kilometers per hour from the west.
Even short-lived tornadoes cannot be completely ruled out.
According to the DWD, there are always showers and thunderstorms in places.
Temperatures reach around 12 degrees in the north and up to 16 degrees in the Harz Mountains.
Hanover - The police situation centers initially had no major damage reports on Thursday morning.
Occasionally trees have fallen on the street, it was said from Osnabrück.
On Wednesday evening, a man was hit by a falling branch in Delmenhorst, but was only slightly injured, the police said.
dpa