A flash flood watch is in effect for the metro-east from now until noon Thursday.
Between two and four inches of rain could fall on the area between now and Sunday, according to the forecast.
There is a 30 percent chance of thunderstorms and showers early Wednesday, according to the National Weather Service. But the chance of showers will increase to 90 percent in the afternoon.
The high will be 67. That’s 15 degrees warmer than the average high of 52 for March 9 in the St. Louis metropolitan area.
Wednesday night, the chance of rain is pegged at 100 percent and the low is expected to drop to 53.
There is a 100 percent chance of rain again on Thursday when the high will be 63.
The likelihood of rain will decrease to 70 percent in the early evening hours and then will drop to 30 percent after 7 p.m. The low will be 45.
Showers are expected to dry up early Friday — at least for a while — with the sun expected to make an appearance after 7 a.m.
The high will be 63.
Showers are likely after 7 p.m. Friday night when the low will be 53.
The weekend forecast calls for a 60 percent chance of rain Saturday with a high of 69. On Sunday, there is a 60 percent chance of rain with a high of 69.