Brookings County, SD

Alerts

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Briefing

Last updated:

Sunday, Jul 26, 2026, 1:48 PM

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From the Forecaster

Dangerous Heat Continues Today

Created by the NWS Sioux Falls WFO

Temperatures once again climb into the 90s to around 100 degrees this afternoon. Oppressive humidity levels will push the heat index as high as 103 to 115 degrees. These conditions can result in heat exhaustion, or even heat stroke, if precautions are not taken.

Image Description

Table of forecast heat index values through today. Values peak from 103 to 115 degrees. The left side of the graphic shows precautions to prevent heat illness. These include adjusting outdoor activity to cooler parts of the day, taking frequent breaks in the shade or A/C, staying hydrated with WATER, and NEVER leaving anyone (people or pets) in a locked vehicle without A/C running.

Sioux Falls Area Forecast Discussion

Seven-day Weather Risk Overview

The graphic shows the daily risk summary for 7 days. Daily risk is based on highest risk factor for that day.

	Sun 7/26	Mon 7/27	Tue 7/28	Wed 7/29	Thu 7/30	Fri 7/31	Sat 8/1
risk level	out of 10	out of 10	out of 10	out of 10	out of 10	out of 10

No risk

Low risk

High risk

See the detailed risk analysis

Radar

Time shown:

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dBz	Intensity
−35–0	Extremely light (drizzle/snow)
0–20	Very light precipitation or general clutter
20–40	Light precipitation
40–50	Moderate precipitation
50–65	Heavy precipitation or some hail
>65	Extremely heavy precipitation including water-coated hail

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Weather Forecasting Office

Sioux Falls Forecast Office