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 Details for Grundy County Severe Thunderstorm Watch

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Severe Thunderstorm Watch SEVERE THUNDERSTORM WATCH - Grundy County

NWS North Mississippi Valley Regional Radar WU North Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 21-Aug-2026 8:25pm - next update at 6:00pm  
Summary / Temperature Wind Rain Outlook
overcast - Lightning observed overcast - Lightning observed
Currently: 73.3, Max: 83.1, Min: 58.9 73.3°F
Colder 1.4°F than last hour.

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Feels like: 72°F

24-hr difference
4.2°FWarmer 4.2°F than yesterday at this time.
  Today Yesterday
High: 83.1°F
4:48pm 		84.5°F
4:25pm
Low: 58.9°F
6:21am 		62.8°F
11:59pm
Calm SE
0.0
Gust:
 0.0 mph
0 Bft - Calm
Today: 0.0 mph 5:46pm
Gust Month: 50.9 mph August 11
Rain Today: 0.00 in
Rain Rate (/hr): 0.000 in
Rain Yesterday: 0.00 in
Storm Rain: 0.00 in
This Month: 9.05 in
Season Total: 39.41 in
8 rain days in August.
Saturday

Saturday: Sunny then Slight Chance Showers And Thunderstorms
Sunny then Slight Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 84 % Increased 1.0% since last hour.
Dew Point: 68.2°F Decreased 1.1°F since last hour.
Barometer: 29.899 inHg  
Baro Trend: Steady
Sunrise: 6:09am
Sunset: 7:43pm
Moonset: 12:19am
Moonrise: 4:44pm
Waxing Gibbous
Waxing Gibbous, Moon at 9 days in cycle
68%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 4.6 @ 12:42pm
0 W/m2 (0 %)
High: 998 @  1:31pm
 NWS Weather Forecast  - Outlook: Tonight & Saturday
Tonight

Tonight: Showers And Thunderstorms Likely
Showers And T-Storms Likely

Lo 63 °F		 NWS forecast: Showers and thunderstorms likely before 1am. Some of the storms could be severe. Mostly cloudy. Low around 63, with temperatures rising to around 65 overnight. West southwest wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
 
Saturday

Saturday: Sunny then Slight Chance Showers And Thunderstorms
Sunny then Slight Chance Showers And T-Storms

Hi 79 °F		 NWS forecast: A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 79. Northwest wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.