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From mid-May to mid-March: Temperatures are about to take us back in time

Mid-May will soon feel like mid-March with a big cool-down on the way. Enjoy the gorgeous weather while it lasts! (KBOI PHOTO)

Enjoy this early taste of summer...while you can!

There's no other way to say it: this afternoon is going to be beautiful, and so is tomorrow. Skies will be mostly sunny, with daytime highs in the low 80's today and mid 80's tomorrow. Temperatures will feel more like they should in mid to late June on Wednesday and Thursday. But by Saturday, the weather will resemble mid-March.

Yeah, you read that right. | Full forecast

Come again?

Temperatures will be running 10-20 degrees above what's considered 'normal' for this time of year today and tomorrow. But Friday, a strong storm setting up in the Pacific will drive a cold front through our area Friday morning, ushering in much colder air and a chance of showers. We're talking about a 25° temperature drop, which will then push our temperatures 10 to 15 degrees south of where they belong. Then Saturday, a second blast of cold air will push in, cooling temperatures off even more.

Highs Friday will struggle to reach 60°, and daytime temperatures Saturday will only top out in the mid 50's (which is typical of mid-March). There's a slight chance of showers Saturday, with rain and snow both possible in the mountains. Snow levels will be between 5,000-6,000 ft. through the weekend in the high terrain.

But the cold snap won't last, right?

Actually, the opposite.

While Mother's Day looks drier with highs in the low 60's, temperatures aren't expected to rebound. Instead, we'll stick with the mid 50's to low 60's through early next week. Current models are indicating there may actually be a colder, more powerful storm brewing in the Gulf of Alaska that wants to slide south into the Pacific Northwest and southwest Idaho early next week. If all holds true, we could see widespread and heavy rain in the area Tuesday into Wednesday. If the storm tracks through where current models suggest it might, the mountains could see up to 1" of liquid precipitation.

Nonetheless, temperatures will stay on the cool side, in the mid 50's to low 60s. Long range forecast models (think: 7-14 days out) suggest we could continue with this unseasonably cool trend, with a better probability of wetter than normal conditions.

What does this mean for snowmelt and flooding?

Summer-like heat Wednesday and Thursday won't help things. Snow will melt rapidly out of the mountains, where daytime highs will climb into the 70's. This will create additional runoff, likely worsening the problems for flooded areas in the coming days. Even with drastic changes on the way for the weekend, the situation won't necessarily improve. Weekend rain will make for additional runoff, while any snow that accumulates in the high country (think: higher peaks) will mean more snowpack that then needs to melt later in the spring.

Keep an eye on Flood Warnings here.

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