CT Weather: Flash Flood Watch Issued As Heavy Rain Pounds State

As heavy rain moves into Connecticut today and tonight the major concern is flooding. The National Weather Service has issued a Flash Flood Watch for the entire state. Connecticut will be in a very stormy and unsettled weather pattern through Tuesday. It appears the weather will improve on Wednesday of next week.

For Southern Connecticut, the weather service says,"Numerous showers and thunderstorms will develop over the area today into tonight. Rainfall rates of 1 to 2 inches an hour are possible. An average of 1 to 2 inches of rainfall is likely across much of the region, with locally 3 to 5 inches possible through tonight.

* Areas of urban and poor drainage flooding are likely, with flash flooding possible in locations that experience successive thunderstorms moving through.

* With 2 to 5 inches of rainfall since the start of the month, the river basins of .... Southwestern Connecticut are particularly vulnerable to flash flooding. This is especially true for areas along quick responding creeks, streams and small rivers that are already running at above normal levels for this time of year.

For Northern Connecticut, the weather service says, "Periods of showers along with embedded thunderstorms will impact the region today and tonight with localized torrential rainfall. The potential exists for these heavy showers to train over the same locations. This will bring the risk for localized flash flooding, including some small rivers and streams. Localized urban flash flooding is also possible. (Keep up with CT events and local news by subscribing to Patch to receive free daily newsletters and breaking news alerts.)

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Here is the updated weather forecast for Southern CT:

Today
Showers and possibly a thunderstorm. Some of the storms could produce heavy rain. High near 78. Southeast wind 5 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

Tonight
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rain. Cloudy, with a low around 69. East wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11am. Some of the storms could produce heavy rain. Cloudy, with a high near 81. Northeast wind 6 to 8 mph becoming east in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night
Showers likely and possibly a thunderstorm before 3am, then a chance of showers and thunderstorms after 3am. Cloudy, with a low around 71. Northeast wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Some of the storms could produce heavy rain. Cloudy, with a high near 81. East wind 7 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night
Showers likely, mainly before 9pm. Mostly cloudy, with a low around 71. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Tuesday
A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 83. Chance of precipitation is 40%.

Here is the updated weather forecast for Northern CT:

Today

Showers and possibly a thunderstorm. Some of the storms could produce heavy rain. High near 76. Light north wind. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Tonight
Showers likely and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms after 11pm. Some of the storms could produce heavy rain. Patchy fog before midnight, then patchy fog after 1am. Otherwise, cloudy, with a low around 66. East wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rain. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 80. North wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night
Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms after 9pm. Some of the storms could produce heavy rain. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 68. East wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before noon. Otherwise, cloudy, with a high near 80. Northeast wind 3 to 5 mph. Chance of precipitation is 60%.

Monday Night
A chance of showers and thunderstorms. Patchy fog after 10pm. Otherwise, cloudy, with a low around 70. Chance of precipitation is 50%.

Tuesday
Showers likely, mainly after noon. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 83. Chance of precipitation is 60%.

Tuesday Night
A chance of showers before midnight. Patchy fog before 2am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 69. Chance of precipitation is 40%.