Update: Tornado Watch and Flash Flood Warning in Effect Monday Night

Updated 3:51 p.m.

The Flash Flood Watch has been upgraded to a Flash Flood Warning until 6 p.m. 

Here's some advice from the National Weather Service for what to do in a flood:

• Do not walk through moving water. Six inches of moving water can make you fall. If you have to walk in water, walk where the water is not moving. Use a stick to check the firmness of the ground in front of you.
• Do not drive into flooded areas. If floodwaters rise around your car, abandon the car and move to higher ground if you can do so safely. You and the vehicle can be swept away quickly.
• Do not camp or park your vehicle along streams, rivers or creeks, particularly during threatening conditions.

Updated 2:52 p.m.

The National Weather Service has issued a Tornado Watch for the D.C. area through 10 p.m. Monday. 

A flash flood watch is in effect until 8 p.m. Monday for the District of Columbia and surrounding jurisdictions. Additionally there is a hazardous weather outlook for the Tidal Potomac River from the Key Bridge to Indian Head, Md. 

Showers are expected throughout the morning and into the afternoon Monday and could bring with them between 1 and 3 inches of rainfall. 

A flash flood watch means rainy conditions could result in flash flooding.