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Southern Idaho Weather Forecast

Published: Sep. 15, 2020 at 7:29 AM MDT|Updated: Sep. 15, 2020 at 8:31 PM MDT
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CHIEF METEOROLOGIST ERIC BRILL – EVENING UPDATE

Tuesday, September 15, 2020

There is an air quality alert in place for all of Southern Idaho through Wednesday afternoon for all of Southern Idaho. It wouldn’t be surprising if this is extended through Friday, as fires continue to burn all around California, Washington, Idaho and Oregon. The smokes from these fires have entered Southern Idaho due to southwesterly winds at higher levels of the sky, and the end result is poor air quality. It is tough to determine how long the air quality is going to be less than stellar around Southern Idaho, but the possibility of a cold front on Friday could give us a little bit of help!

Smoky skies and warm conditions will continue to be in Southern Idaho as the week marches along.

The Badger Fire, which is burning in the Southwestern corner of Cassia County, has burned over 27,000 acres as of 3:30 PM on Tuesday {9/15/2020} afternoon. It is threatening 10 residences and one residence has already been destroyed. Luckily, there weren’t any injuries with the one destroyed residence. Despite the efforts of MANY firefighters, this fire hasn’t been able to be contained at all due to the unfavorable weather, among a few other factors. To those of you that are out there fighting these fires, thank you for what you do. It truly is appreciated more than you know.

As far as the weather not directly pertaining to this fire is concerned, filtered sunshine and warm weather is expected to continue. Temperatures are going to run about 10° above average for both Wednesday and Thursday before an area of low pressure is going to approach us. This area of low pressure is going to bring some clouds into the region on Thursday, and knock down temperatures a bit for Friday. The opportunity for some showers to develop in Southern Idaho will start late Friday afternoon, in which the best chance of showers will ultimately be on Saturday. The Wood river Valley has the best chance to see some rain, followed by the Mini-Cassia Region and then the Magic Valley.

One thing that there is very high confidence in is the drop in temperatures from Thursday to Saturday. I expect afternoon high temperatures to be about 10° cooler from Thursday to Friday, and then again from Friday to Saturday. This means that a lot of Southern Idaho is going to top-off in the 60s on Saturday, under partly cloudy to partly sunny skies. A little bit of a breeze is going to develop with this incoming area of low pressure, but those winds don’t appear to be quite as strong as what the various data I was looking at was hinting at earlier this week. This area of low pressure should also clear some of the smoke out of Southern Idaho for at least a few days, which should improve the air quality as well.

Fall-like weather is expected for Sunday as well as the beginning of next week. This means that temperatures are going to be in the 60s and 70s for highs under partly cloudy skies. An area of high pressure is expected to develop by the middle and end of next week, which could cause more smoke to be put into the skies of Southern Idaho. Knowing this, you will want to enjoy the nice weather that is expected for Sunday, Monday and Tuesday!

The smoke isn’t something that anyone wants to contend with, as it does reduce the air quality within Southern Idaho by quite a bit. There is a reason to be optimistic about this come the weekend, but at the same time, Mother Nature needs to help out the firefighters as well! If we aren’t able to get some shower activity in the South Hills of Cassia and Twin Falls Counties, and the winds aren’t able to simmer down, we will be contending with the Badger Fire for at least a little bit. Keep your fingers crossed that Mother Nature works in our favor as this area of low pressure arrives!!

'<a href="http://www.kmvt.com/weather/alerts/" target="_blank"><b> For the latest on all warnings and advisories in Southern Idaho click here… </b></a>

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TUESDAY NIGHT (September 15, 2020)

MAGIC VALLEY: Smoky/hazy skies. Aside from that, clear skies. Low: 52. Winds: South 3-8 mph.

WOOD RIVER VALLEY: Smoky/hazy skies. Aside from that, clear skies. Low: 51. Winds: North 5-10 mph.

WEDNESDAY (September 16th)

MAGIC VALLEY: Smoky skies from fires in California, Oregon, Idaho and Washington. Otherwise, mainly sunny skies and warm. High: 88. Winds: East to Northwest 5-10 mph.

WOOD RIVER VALLEY: Smoky skies from fires in California, Idaho, Oregon and Washington. Otherwise, mainly sunny and warm. High: 81. Winds: South to Southwest 5-10 mph.

WEDNESDAY NIGHT:

MAGIC VALLEY: Smoky skies from fires in California, Oregon, Idaho and Washington. Aside from that, clear skies. Low: 54. Winds: Southeast 3-8 mph.

WOOD RIVER VALLEY: Smoky skies from fires in Idaho, California, Oregon and Washington. Aside from that, clear skies. Low: 51. Winds: North 3-8 mph.

THURSDAY (September 17th)

MAGIC VALLEY: Smoky skies from fires in California, Idaho, Oregon and Washington. Aside from that, partly cloudy skies and warm. High: 89. Low: 58. WOOD RIVER VALLEY: Smoky skies from fires in California, Idaho, Oregon and Washington. Aside from that, partly cloudy skies and warm. High: 82. Low: 50.

FRIDAY (September 18th)

MAGIC VALLEY: Partly sunny skies with a slight chance of a PM rain shower and/or a thunderstorm. Not quite as warm. High: 80. Low: 50. WOOD RIVER VALLEY: Partly sunny skies with a slight chance of a PM rain shower and/or a thunderstorm. Not quite as warm. High: 72. Low: 43.

SATURDAY (September 19th)

MAGIC VALLEY: Partly cloudy skies with some isolated rain shower and thunderstorms. Cooler and a little bit breezy. High: 68. Low: 47. WOOD RIVER VALLEY: Partly cloudy skies with a chance of rain showers and thunderstorms. A little bit breezy and cooler. High: 62. Low: 38.

SUNDAY (September 20th)

MAGIC VALLEY: Sunny skies and pleasant. High: 71. Low: 46. WOOD RIVER VALLEY: Mostly sunny skies and pleasant. High: 65. Low: 40. MONDAY (September 21st)

MAGIC VALLEY: Partly cloudy skies and pleasant. High: 78. Low: 50. WOOD RIVER VALLEY: Partly cloudy skies and pleasant. High: 71. Low: 44.

TUESDAY (September 21st)

MAGIC VALLEY: Partly cloudy skies and pleasant. High: 78. WOOD RIVER VALLEY: Partly cloudy skies and pleasant. High: 74.

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