Hourly Weather Forecast - Mercedes, San Luis, AR

8:29 PM
9 PM
81°F
0%
7mph
NNW
Mostly Clear
Humidity
28%
Feels like
80°F
Dew Point
45°F
10 PM
76°F
0%
8mph
NNW
Mostly Clear
Humidity
35%
Feels like
76°F
Dew Point
46°F
11 PM
72°F
0%
8mph
NNW
Mostly Clear
Humidity
40%
Feels like
72°F
Dew Point
47°F

Rainfall and Snowfall Totals Through Thursday

Flooding Rain, Heavy Snow and Winds Slam Northwest, North-Central U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Thursday's Weather Outlook

Thursday's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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