Overnight flooding risk into Tuesday morning

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12:02 a.m. Tuesday Morning Update: Flash Flood Warning was been extended until 3 a.m. for northern Darke County, southern Mercer County, Shelby County, and Logan County. 2-3 inches of additional rainfall is possible by 3 a.m. Tuesday morning. This could lead to a rapid rise in water across low lying areas, creeks, and streams.

The Flash Flood Watch has been extended to include Clark and Miami County with thunderstorms forming a bit further to the south then expected earlier tonight.

The Flash Flood Watch is until 6 a.m. Tuesday Morning.

11:49 p.m. Update: Severe Thunderstorm Warning CANCELED for Miami and Shelby County.

11:42 p.m. Update: Severe Thunderstorm Warning for Miami and Shelby County until midnight. 60 mph wind gusts may result in power outages and tree damage.

11:00 p.m. Update: FLASH FLOOD WARNING is until 2:00 a.m. A dangerous flooding situation is shaping up for areas from Rossburg through Sidney and Bellfontaine. Up to 4 inches of rain has fallen as of 11 p.m. An additional 1-3 inches of rain is possible through 2 a.m.

10:30 p.m. Update: Flash Flood Warning for Mercer, Auglaize, and northern Logan County until 2:15 a.m.

The severe weather threat is over the Miami Valley. Thunderstorms will continue for northern Darke, Shelby, Mercer, Logan, and Auglaize County. The biggest risk will be flooding. A Flood Watch is in place until 6 a.m. for these counties.

A line of training thunderstorms will follow the same path across the area in red producing high rainfall totals. As of 10:30 p.m. Monday night radar estimates were already 2-3 inches across the area.

Flash Flooding can happen rapidly. Move to higher ground now if you live in a low lying valley that can flood. Do not drive on flooded roads. 1 foot of water can float vehicles. 2 feet of rushing water is powerful enough to carry SUVs.

8:11 p.m. Update: Severe Thunderstorm Warning for Dayton and Montgomery County is canceled. The warning continues for southern Darke County, northern Preble County, and Wayne County, Indiana, until 8:30 p.m.

7:57 p.m. Update: Severe Thunderstorm Warning for southern Darke County, northern Preble County, and Wayne County, Indiana, until 8:30 for 60 mph wind gusts and quarter-sized hail.

Severe Thunderstorm Warning for Montgomery and Greene County until 8:30 p.m. This warning Includes Dayton, Kettering, Beavercreek, Huber Heights, Fairborn, Xenia. Trotwood, Vandalia, Englewood, Moraine, Oakwood, Yellow Springs, and Wright Patterson Air Force Base.

Damaging winds may result in power outages and minor tree damage. Radar indicates wind gusts up to 60 mph.

7:12 p.m. Update: Currently there are no severe thunderstorm warnings for the Miami Valley.

Isolated thunderstorms continue to move into the region from the east to the west. Thunderstorms will stay along and north of I-70 into the night.

6:34 p.m. Update: Severe Thunderstorm Warning for Clark County until 7:15 p.m. 60 mph wind gusts and penny-sized hail are possible.

Tree damage and minor hail damage is possible. It is best to take shelter indoors and away from windows.

Severe Thunderstorm Warning for Drake and Miami County expired at 6:15 p.m.

5:45 p.m. Update: Severe Thunderstorm Warning for Southeast Darke County and Miami County until 6:15 p.m. This storm is capable of quarter-sized hail and 60 mph wind gust. It is moving east at 30 mph.

A few of the cities impacted include Troy, Piqua, Greenville, Tipp City, West Milton, Covington, Bradford, and Pleasant Hill.

Tree damage and minor hail damage is possible. It is best to take shelter indoors and away from windows.

5:28 p.m. Update: Tornado Warning continues for areas NE of Columbus until 6 p.m. A tornado was reported by storm spotters in the area near Delaware City. Trees are being reported down. The National Weather Service has also noted another area of rotation near Sunbury.

5:05 p.m. Update: Severe Thunderstorm Warning expired on time for Logan County. As this storm continues to track east out of the Miami Valley, the storm is now capable of producing a Tornado. A Tornado Warning was issued for portions of Union, Licking, Delaware and Franklin County until 5:30 p.m.

4:54 p.m. Update: Urbana will notice and wind shift out of the north and an increase in wind speed. An outflow boundary is moving through Champaign County. A few storms may develop along this boundary.

4:44 p.m. Update: The warning has been updated, only areas east of U.S. 68 in Logan County are in the Severe Thunderstorm Warning.

A 46 mph wind gust was recorded at the Bellefontaine Airport.

4:24 p.m. Update: Severe Thunderstorm Warning for Logan County until 5 p.m. Half dollar sized hail and 60 mph wind gusts are possible.

A slow moving cold front has kept thunderstorms just north of the Miami Valley most of Labor Day. There will be a slow trend south into the evening.

Right now a strong thunderstorm is moving into Mercer County. Wind gust are up to 40 mph with heavy rainfall. Water may pond on roads and fill ditches and streams quickly.

South of the cold front it is hot and humid. At 3 p.m. the temperature in Dayton is 88 degrees. The heat index is 92 degrees. Dayton should stay dry into the early evening. There is a chance of thunderstorms between 6 and 8 p.m. It will continue to be windy until the front lifts back north tonight. You can expect wind without a thunderstorm to be sustained around 18 mph with gusts 20-30 mph.

There is a low risk of severe thunderstorms producing wind gusts 60-70 mph.

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