Flood Watch issued August 15 at 10:48AM EDT until August 16 at 8:00AM EDT by NWS Wilmington OH (details ...)
* WHAT...Flash flooding caused by excessive rainfall continues to be possible.
* WHERE...Portions of Indiana, including the following counties, Fayette, Franklin, Union and Wayne and Ohio, including the following counties, Adams, Auglaize, Butler, Champaign, Clark, Clinton, Darke, Delaware, Fairfield, Fayette, Franklin, Greene, Hardin, Highland, Hocking, Licking, Logan, Madison, Mercer, Miami, Montgomery, Pickaway, Pike, Preble, Ross, Scioto, Shelby, Union and Warren.
* WHEN...Through Sunday morning.
* IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS... - Additional rounds of showers and thunderstorms are expected today and tonight. Heavy rainfall is possible, especially tonight, which may result in flash flooding.
Weather Observations near Celina (12:16 pm)
73 Temperature °F 73 Feels Like °F 96 Humidity % SW 2.0 Wind mph 2.7 gusts 0.26 Rain Today inch 5.10 Rain Last Week inch 1023.1 Pressure mb 9055 Brightness Lux 1 UV Index
Weather Forecast for the Grand Lake area
Conditions Aug 15 Aug 16 Aug 17 Aug 18 Aug 19 Aug 20 Saturday 81° Saturday 81° likely 73° 73° likely Sunday 83° Sunday 83° chance 70° 70° chance Monday 78° Monday 78° 63° 63° Tuesday 78° Tuesday 78° 66° 66° Wednesday 80° Wednesday 80° likely 65° 65° likely Thursday 74° Thursday 74° slight chance 60° 60° slight chance Temperature 60° 65° 70° 75° 80° 85° 12 pm Aug 15 12 am 12 pm Aug 16 12 am 12 pm Aug 17 12 am 12 pm Aug 18 12 am 12 pm Aug 19 12 am 12 pm Aug 20 12 am Temperature Feels Like Dewpoint Precipitation, Humidity and Clouds 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 12 pm Aug 15 12 am 12 pm Aug 16 12 am 12 pm Aug 17 12 am 12 pm Aug 18 12 am 12 pm Aug 19 12 am 12 pm Aug 20 12 am Precipitation Humidity Cloud Cover 0.29" 0.21" 0.62" 0.15" 0.13" 0.16" 0.01" Rain inches Wind 0 2 4 6 8 10 12 14 16 18 20 22 12 pm Aug 15 12 am 12 pm Aug 16 12 am 12 pm Aug 17 12 am 12 pm Aug 18 12 am 12 pm Aug 19 12 am 12 pm Aug 20 12 am Wind mph Gust mph Direction
Source: National Weather Service
Wind direction arrow points in direction wind is
blowing toward. Example: wind is blowing
from southwest to northeast.
Saturday
August 15
avg high: 82.2°F
avg low: 62.1°F
rec. high: 97, 1965
rec. low: 43, 1979
Sunrise: 6:47 am
Sunset: 8:37 pm
Moonrise: 9:07 am
Moonset: 9:00 pm
Sunday
August 16
avg high: 82.1°F
avg low: 62.1°F
rec. high: 95, 1988
rec. low: 41, 1979
Sunrise: 6:48 am
Sunset: 8:36 pm
Moonrise: 10:14 am
Moonset: 9:22 pm
Monday
August 17
avg high: 82.1°F
avg low: 62.0°F
rec. high: 99, 1988
rec. low: 46, 1981
Sunrise: 6:49 am
Sunset: 8:34 pm
Moonrise: 11:21 am
Moonset: 9:47 pm
Tuesday
August 18
avg high: 82.1°F
avg low: 61.9°F
rec. high: 96, 1988
rec. low: 43, 1981
Sunrise: 6:50 am
Sunset: 8:33 pm
Moonrise: 12:26 pm
Moonset: 10:14 pm
Wednesday
August 19
avg high: 82.1°F
avg low: 61.8°F
rec. high: 99, 1983
rec. low: 46, 1964
Sunrise: 6:51 am
Sunset: 8:31 pm
Moonrise: 1:31 pm
Moonset: 10:46 pm
First Quarter Moon: 10:46 pm
Thursday
August 20
avg high: 82.0°F
avg low: 61.6°F
rec. high: 101, 1983
rec. low: 47, 2024
Sunrise: 6:52 am
Sunset: 8:30 pm
Moonrise: 2:33 pm
Moonset: 11:25 pm
Source: National Centers for Environmental Information, Howick Family Observations via RCC-ACIS, NOAA
Indianapolis Radar
12:13 pm, Aug 15
Source: National Weather Service
Stream Gauge Heights 0' 2' 4' 6' 8' 10' 12' 14' 12 am 12 pm Aug 08 12 am 12 pm Aug 09 12 am 12 pm Aug 10 12 am 12 pm Aug 11 12 am 12 pm Aug 12 12 am 12 pm Aug 13 12 am 12 pm Aug 14 12 am 12 pm Aug 15 Chickasaw Creek St. Marys River at Rockford Miami and Erie Canal at Minster Loramie Creek near Newport Wabash River at Linn Grove, IN
Source: U.S. Geological Survey
Grand Lake Height (above sea level) 869.00' 869.25' 869.50' 869.75' 870.00' 870.25' 870.50' 870.75' 871.00' May 17 May 24 May 31 Jun 07 Jun 14 Jun 21 Jun 28 Jul 05 Jul 12 Jul 19 Jul 26 Aug 02 Aug 09 Grand Lake at West Bank Spillway
Source: U.S. Geological Survey
Midwest US from Satellite
12:06 pm, Aug 15
(Tap or click to animate.)
Source: NOAA GOES satellite imagery
Contiguous US from Satellite
12:06 pm, Aug 15
(Tap or click to animate.)
Source: NOAA GOES satellite imagery
US Weather Map
9:38 am, Aug 15
(Tap or click to animate.)
Source: NOAA Weather Prediction Center
Drought Maps
August 11, 2026
(Tap or click to animate.)
None
Abnormally Dry
Moderate Drought
Severe Drought
Extreme Drought
Exceptional Drought
Source: U.S. Drought Monitor