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Southern Idaho Weather Forecast

Published: Sep. 16, 2020 at 7:57 AM MDT|Updated: Sep. 16, 2020 at 5:00 PM MDT
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CHIEF METEOROLOGIST ERIC BRILL – EVENING UPDATE

Wednesday, September 16, 2020

There is an air quality alert and a red flag warning in place for the majority of Southern Idaho through the PM hours of Friday. The air quality alert that is in place is due to less smoke from fires that 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. With a little bit of a breeze expected for the next couple of days, more fires could ignite, and the favorable weather conditions will allow them to spread rather easily. 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 for the upcoming weekend!

No big surprises or changes have developed in the forecast over the past 24 hours, but there are changes coming to the weather in Southern Idaho over the next few days.

As noted above, there are air quality alerts/warnings in place for all of Southern Idaho through Friday. I anticipate that the Mini-Cassia Region will have the poorest air quality through Friday, and potentially the weekend, due in large part to the Badger fire in Cassia County. This fire has now burned about 30,000 acres, and still doesn’t have very much containment. Even though an incoming area of low pressure should give that part of Southern Idaho some help, I don’t expect that to completely eliminate that fire. Some shower activity should help the firefighters out there a bit, and hopefully there won’t be a lot of lightning within those storms (but the possibility is there for it). It is also possible that more fires do flare up over the next few days, and that is why the fire weather/red flag warning is in place.

The incoming area of low pressure will start to become noticeable that it is getting closer and closer on Friday. More clouds are going to develop throughout the day, and it appears that some showers are going to mix in with our weather late in the evening on Friday. I anticipate that the Wood River Valley has the best chance to see showers for Friday and Saturday, but some of those do look to mix down into the Magic Valley and Mini-Cassia Region. Aside from the increased cloud coverage, as well as the increased chance of precipitation, temperatures are also going to fall back a bit as well.

From Thursday to Friday, temperatures will likely fall about 5-10° for both afternoon high temperatures and overnight low temperatures all around Southern Idaho. An even more significant drop in temperatures is expected from Friday to Saturday, but that will be more for the high temperatures than that of the low temperatures. Both Friday and Saturday will be a little bit breezy as well.

The back-half of the weekend is going to be a REALLY nice one, as temperatures will start to rebound a little bit, but developing sunshine and pretty tame winds are expected. Temperatures are going to continue to go upward for the beginning and middle of next week, but will not get too warm at all. Partly cloudy to mostly sunny skies are also expected, so some AWESOME weather is in the forecast! I do want to note…. The Badger Fire will likely still be burning next week, so chances are that more smoke is going to be in Southern Idaho. The lingering smoke around the area will easily be the biggest negative to the forecast.

An interesting week of weather is ahead for the area! Hopefully there are going to be some showers on top of the Badger Fire (and all of Southern Idaho, for that matter), so we can eliminate that fire threat a little bit. I don’t think that this cold front is really going to solve that problem greatly, but we will take any help we can get!!

'<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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WEDNESDAY NIGHT (September 16, 2020)

MAGIC VALLEY: Smoky/hazy skies. Aside from that, clear skies. Low: 55. Winds: Southeast 3-8 mph.

WOOD RIVER VALLEY: Smoky/hazy skies. Aside from that, clear skies. Low: 51. Winds: North 3-8 mph.

THURSDAY (September 16th)

MAGIC VALLEY: Smoky skies from fires in California, Oregon, Idaho and Washington. Otherwise, developing clouds through the day and warm. High: 87. Winds: Southeast 5-15 mph.

WOOD RIVER VALLEY: Smoky skies from fires in California, Idaho, Oregon and Washington. Otherwise, increasing clouds throughout the day and warm. High: 81. Winds: Southeast 5-15 mph.

THURSDAY NIGHT:

MAGIC VALLEY: Smoky skies from fires in California, Oregon, Idaho and Washington. Aside from that, partly cloudy skies. Low: 58. Winds: South 5-20 mph.

WOOD RIVER VALLEY: Smoky skies from fires in Idaho, California, Oregon and Washington. Aside from that, decreasing clouds through the night. Low: 50. Winds: Northeast 3-8 mph.

FRIDAY (September 18th)

MAGIC VALLEY: Smoky skies from fires in Idaho, California, Oregon and Washington. Mostly cloudy skies with some isolated PM rain showers and thunderstorms. Not quite as warm. High: 80. Low: 51. WOOD RIVER VALLEY: Smoky skies from fires in Idaho, California, Oregon and Washington. Mostly cloudy skies with some isolated PM rain showers and thunderstorms. Not quite as warm. High: 74. Low: 44.

SATURDAY (September 19th)

MAGIC VALLEY: Partly cloudy skies with a chance of rain showers and thunderstorms. Cooler and a little bit breezy. High: 68. Low: 47. WOOD RIVER VALLEY: Partly cloudy skies with some scattered 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: Mainly sunny skies and pleasant. High: 66. Low: 40. MONDAY (September 21st)

MAGIC VALLEY: Mostly sunny skies and pleasant. High: 78. Low: 50. WOOD RIVER VALLEY: Mostly sunny skies and pleasant. High: 71. Low: 44.

TUESDAY (September 22nd)

MAGIC VALLEY: Partly cloudy skies and pleasant. High: 78. Low: 51. WOOD RIVER VALLEY: Partly cloudy skies and pleasant. High: 74. Low: 44.

WEDNESDAY (September 23rd)

MAGIC VALLEY: Mostly sunny skies and pleasant. High: 80. WOOD RIVER VALLEY: Partly cloudy skies and pleasant. High: 75.

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