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Clear

38°F

Updated	3:48 am
Feels Like	39°F
Humidity	87%
Wind	W 6 mph
Barometer	30.18 in
Dew Point	35°F

Clear

3°C

Updated	3:48 am
Feels Like	4°C
Humidity	87%
Wind	W 10 km/h
Barometer	102.2 kPa
Dew Point	2°C

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Cloud Cover	15%
Wind Chill	33°F 1°C
Sunrise	7:21 AM
Sunset	5:18 PM
Moonrise	6:54 AM
Moonset	4:34 PM

Civil Twilight
6:48 AM to 7:18 AM
5:17 PM to 5:47 PM
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Lyon School Weather Forecast

TODAY	TONIGHT	MONDAY	MONDAY NIGHT	TUESDAY	TUESDAY NIGHT	VETERANS DAY	WEDNESDAY NIGHT	THURSDAY	THURSDAY NIGHT	FRIDAY	FRIDAY NIGHT

Sunny	Partly Cloudy	Mostly Sunny	Mostly Clear	Mostly Sunny	Partly Cloudy	Mostly Sunny	Partly Cloudy	Mostly Sunny	Mostly Clear	Sunny	Partly Cloudy
Hi: 61°FHi: 16°C	Lo: 41°FLo: 5°C	Hi: 61°FHi: 16°C	Lo: 35°FLo: 2°C	Hi: 60°FHi: 16°C	Lo: 39°FLo: 4°C	Hi: 55°FHi: 13°C	Lo: 31°FLo: -1°C	Hi: 49°FHi: 9°C	Lo: 31°FLo: -1°C	Hi: 55°FHi: 13°C	Lo: 39°FLo: 4°C

POP = Probability of Precipitation.

Weather Outlook Updated: 204 AM CST Sun Nov 08 2026 Lyon School, SD Weather - WeatherWorld.com

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Issued: 1045 PM CST Sat Nov 7 2026

Key Messages

Expect mild and dry weather Sunday through Tuesday with highs in the 50s to mid 60s.
A system to the north will swing cooler temperatures southward for Thursday and Friday. A few sprinkles or very light showers are possible Wednesday.

Discussion

... Issued at 201 PM CST Sat Nov 7 2026

Dry west to northwest flow aloft will bring dry and mild conditions to the surface through early next week. A weak boundary will sag into the area later tonight into Sunday as low pressure moves east along...

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Weather 101: Term of the Day

Rogue Wave

Commonly used term by mariners of a wave of an unexpected wave of much greater height or steepness than other waves in the prevailing sea or swell system. Rogue waves have been part of marine folklore for centuries. They are generally considered to be unexpectedly high waves which in some instances come from a direction different from the predominant waves in the local area. A single rogue wave has certainly been known to spell disaster for the mariner. They have, over the past twenty or thirty years, come to be recognized as unique phenomena albeit with several possible causes.,(1) Constructive interference. Several different wave trains of differing speeds and directions meet at the same time. The heights of the crests are additive so that an extreme wave may result when very high waves are included in the wave trains. The effect is normally short lived since the wave trains continue to separate and move on.,(2) Focusing of wave energy. When storm forced waves are developed in a water current counter to the wave direction an interaction can take place which results in a shortening of the wave frequency. The result is the superimposing of the wave trains and the generation of extreme waves. Examples of currents where these are sometimes seen are the Gulf Stream and Agulhas current. Extreme wave developed in this regime tend to be longer lived.,(3) Normal part of the wave spectrum. The generation of waves on water results not in a single wave height but in a spectrum of waves distributed from the smallest capillary waves to large waves indeed. Within this spectrum there is a finite possibility of each of the wave heights to occur with the largest waves being the least likely. The wave height most commonly observed and forecast is the significant wave height. This is defined as the average of the one third highest waves. The probability of encountering such a wave is about 1 in 10 while 1 in 1000 waves will be nearly double the significant wave height or higher. This is thought to be the source of at least some reports of rogue waves.