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Flash flood watch issued for Central Indiana ahead of heavy rainfall

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The National Weather Service has issued a FLASH FLOOD WATCH for Central Indiana.  This watch includes the counties pictured above and listed here:

Bartholomew, Boone, Brown, Carroll, Clay, Clinton, Daviess, Decatur, Delaware, Fountain, Greene, Hamilton, Hancock, Hendricks, Henry, Howard, Jackson, Jennings, Johnson, Knox, Lawrence, Madison, Marion, Martin, Monroe, Montgomery, Morgan, Owen, Parke, Putnam, Randolph, Rush, Shelby, Sullivan, Tippecanoe, Tipton, Vermillion, Vigo and Warren

Recent widespread rainfall in excess of 2” has saturated the ground across Central Indiana. A strong storm system will bring thunderstorms with heavy rainfall to the area Thursday afternoon and Thursday night which will have the capacity to quickly drop heavy rainfall on highly saturated ground and this could rapidly lead to flash flooding.

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The National Weather Service has issued several River Flood Warnings this afternoon for Central Indiana.   The rivers are highlighted below and include:

flood warnings

Big Blue River, Driftwood River, East Fork White River, Eel River, Mississinewa River, Muscatatuck River, South Fork WildcatCreek, Sugar Creek, Tippecanoe River, Wabash River, White River and Wildcat Creek

Widespread river flooding will develop across our viewing area starting Friday through early next week.  This is especially the case for the Wabash River in Western Indiana.  This flooding will affect several local and state roads and you will notice extensive agricultural (field) flooding and flooding to recreational areas. Residential areas will also have to be watched closely. 2″ of rain has already fallen over the warned area and an additional 1-3” of rain will fall from now through Friday afternoon.  Some of the heaviest will fall right over the Wabash River basin, which is why it will be watched closely

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The National Weather Service has the majority of Central Indiana in a FLOOD ADVISORY until 9 PM Wednesday.  The counties included (in green above) are:

FLOOD ADVISORY

In effect until 9 PM Wednesday

Bartholomew, Boone, Brown, Decatur, Delaware, Fountain, Greene, Hamilton, Hancock, Hendricks, Henry, Johnson, Madison, Marion, Montgomery, Morgan,  Owen, Parke, Putnam, Randolph, Rush, Shelby, Sullivan, Tippecanoe, Tipton, Vermillion, Vigo and Warren County.

Heavy rains that started Tuesday night and lasted into Wednesday morning created minor flooding issues across much of Central Indiana.  In some posts it was only rural field flooding.  But in the metro we had reports of water covering roads and intersections.  The city of Indianapolis set a 1 day rainfall record on Tuesday.  We officially had 1.81″ of rain before midnight and this is now the most rain ever recorded in the city for April 16th.  Rainfall continued overnight in the metro, causing our rainfall total to rise to 2.67″ before the rain finally let up late this morning. Here’s a look at how much rain has fallen over the last 24 hours in more locations around the area.

Storm_Rainfall_totals

We will see the chance for scattered showers and thunderstorms again this afternoon and these could once again pack heavy rain.  But the next likely chance of heavy rainfall arrives late Thursday and into Friday morning.  This will be a strong line of thunderstorms that could also become severe.  Frequent lightning, heavy rainfall, large hail, high winds and even isolated tornadoes will be possible with the passage of this system.  The Storm Prediction Center has our entire area in a “slight risk” for severe weather that day due to these threats.  But by the time this line passes, we could see large amounts of rain falling once again.  Here’s a look at one of our in-house weather models.  It’s picking up another 1-2″ of rainfall that night so the flood threat could and will likely return before the end of the work week.

Rainfall_Forecast

Rainfall possible between 10 PM Wednesday to 8 PM Friday