Eight.

This is whether world.

Good evening and welcome to Weather World on this Monday, the 11th of May.

I'm Marisa Ferger alongside Ben Reppert and Ben.

A pretty comfortable day out there today.

Some clouds across parts of the state, but some cool weather coming our way.

Yeah, northwesterly winds are blowing, ushering in a new air mass.

The problem is that air mass is cold enough that we have to talk frost and freeze yet again tonight.

Okay, well, Ben will give us those details in just a couple of minutes.

Also on tonight's show, I'll have the extended forecast, which actually features Ben, a big warm up as we go into this weekend into early next week.

But first, here's Rob Lydick with hashtag headlines.

I'm Rob Lydick and this is Hashtag Headlines, our weekly look at what's been trending in weather and climate news.

We'll get started with hashtag Rocky Mountain.

Snow may snowfall on the Colorado ski slopes is not unusual, but after one of the warmest and driest winters on record, that forced ski resorts to close early, any snow at all is out of the ordinary.

That's what made last week in parts of the Rockies so notable.

A late season storm drops a much needed snowfall throughout the region last Tuesday and Wednesday, and ended up being the biggest of the season for several places.

Boulder recorded 10.7in from the storm, while Denver picked up 5.8in.

That was their biggest snowstorm since 1983.

On average, Denver picks up just 1.4in of snow in the month of May, north of the Mile High City in and around Rocky Mountain National Park.

Some places measured close to 30in, while the snow was a welcome sight for many, it won't be a drought buster.

As of last week, nearly 60% of Colorado was listed in extreme or exceptional drought by the U.S.

Drought Monitor hashtag Mississippi Twisters.

Cleanup is underway in southern Mississippi after several tornadoes destroyed hundreds of homes and injured more than a dozen people last Thursday.

In the days that followed, the National Weather Service survey teams confirmed eight tornadoes.

The strongest was on the ground for nearly 67 miles, was just over a mile wide and was rated an EF3 on the enhanced Fujita scale, with maximum winds up to 137mph.

The destruction largely occurred south of the state capital of Jackson, with debris scattered over 100 miles.

Drones captured footage of near complete devastation to a mixed forest, including some debarking of trees.

Some severe weather is possible in southern Mississippi today before things quiet down for the remainder of the week.

And finally tonight.

Hashtag iridescent clouds.

Many of you have shared some stunning snapshots of recent Pennsylvania rainbows with us over the past few weeks, but they were nothing like what was seen in the skies over Indonesia.

On May 1st, residents captured a meteorological rarity iridescent clouds.

These clouds, sometimes called rainbow clouds or fire rainbows, occur when sunlight interacts with tiny uniform water droplets or ice crystals in the atmosphere, typically after rainfall in a thin cloud.

When light passes through the droplets at just the right angle, it diffracts, bending and separating into its component colors and creating a shimmering prismatic effect.

The viewer has to be at just the right location to see the vivid, otherworldly display.

The video went viral, causing some on social media to claim it was a fake or caused by so-called chemtrails.

Indonesia's meteorology, Climatology and Geophysics agency weighed in and confirmed that the phenomenon is real, natural and related to atmospheric optics.

Yet another example of our awe inspiring atmosphere.

And those are this week's hashtag headlines.

Your Pennsylvania short range forecast is coming up next.

Well, you might have noticed they're on the extremes.

Break.

The lowest temperature in Pennsylvania last week was 27.

I think several locations could outdo that tonight.

We'll talk about that in a moment.

First, we'll take you outside and show you the view from the Penn State golf course this morning.

This camera looks southeast and you'll notice a change in the clouds today.

First, moving from a general right to left, more of a southwest to northeast direction.

And then in the afternoon, the clouds started moving toward the southeast.

And that's an indication of a northwesterly flow that has taken over as high pressure builds in.

And as we alluded to off the top, that's the arrival of a new air mass.

But it's a chilly air mass for this time of the year.

Pretty fun satellite picture to look at today.

You can see some of the higher level clouds streaming from southwest to northeast this morning, with a system that's been on the on the exit.

And then in the wake of that today, some fair weather and low topped cumulus clouds bubbled up with the heating of the day moving from northwest to southeast.

But these are going to crumble quickly tonight.

And that's going to be one of the ingredients that will lead to a pretty chilly mid May night.

Winds have been fairly fresh out of the northwest today.

If you've been outside, you probably noticed that, but these will also be calming down as we head into the overnight hours.

So you combine the clear sky or the clearing sky with these lightning winds, and that is a recipe for a cold night.

Frost and freeze alerts are widespread.

Anyone in the purple?

That is a freeze warning for temperatures generally between about 26 and 32 overnight.

Tonight, this lighter blue color that is a frost advisory, where temperatures are expected to drop between about 32 and 36.

So if you did any planting or if you have any plants in pots or raised beds, it's a good idea tonight to either cover them up or move them inside if you can to protect them.

Even if you're in one of these fringe counties just outside of the advisories, it might not be the worst idea.

If you're trying to save any of that tender vegetation overnight tonight.

The good news is this cold blast is short lived.

You'll notice that the core of the chill is pretty much centered on us right now.

Highs today anywhere from about 10 to 15 degrees below average, only topping out in the 50s.

But over the next couple of days, as high pressure slides off to the east, will be trading that weather more for 60s and even some 70s.

It's going to take some time, though, before we get into this kind of warmth, but I think Marissa has some of that in the extended forecast.

In just a few moments, we've been watching a cold front slide off the eastern seaboard.

It actually got a little bit of a boost in moisture in the last 12 hours, providing some needed rain to parts of the northern Mid-Atlantic.

Although some folks in North Carolina might have wished that this extended down there today.

In any case, that is in the process of moving off the coast, high pressure is centered over the Midwest that is building in.

And our next weather system is currently taking shape up across the Northern Plains.

We can watch all this evolve over the next 48 hours.

On the Surface map, there's the high building in overnight tonight that's responsible for the sky that will be clearing out the winds, going light to calm.

Then as quickly as that clear weather builds in, it's actually fleeting.

Tomorrow, clouds will begin streaming in from west to east during the afternoon, and then this system will provide us with some rain showers as we head into the day on Wednesday.

Not a ton of precipitation, but enough to keep it in the conversation, that is for sure.

We'll take a closer look at that right now tomorrow morning.

Mainly clear.

That's the cold start.

During the day, a fairly bright day.

Clouds will increase from west to east late in the afternoon, and then tomorrow night into Wednesday it becomes a bit of a showery situation.

First west, then the rain will spread east as we head through the day.

Wednesday Wednesday afternoon.

There could also be a few thunderstorms that get involved as well.

For tonight, though, it is a chilly mid May night north of I-80 and then down the spine of the mountains.

Lots of frosty and breezy hollows.

Cover those plants if you want to save them.

I think far southwest PA and far southeast PA will avoid a frost and a freeze overnight tonight.

That's just about it for Tuesday.

It will be a bright day for most folks and for a while, especially in eastern Pennsylvania.

Eventually, high clouds will begin thickening late in the day in the west, and there could even be a shower in far northwest PA before the day is done, but fairly comfortable.

Highs mainly in the 60s on Tuesday and then Wednesday.

We've got some showers centered on the west in the morning, spreading east in the afternoon.

Temperatures once again, mainly in the 60s.

The extended forecast is next.

This spring.

We've taken quite the temperature roller coaster ride in Pennsylvania, and it looks like that's going to continue into the upcoming extended forecast.

But I can promise you we're going to be on the upswing of that ride.

Before we get to that, here's the water vapor satellite imagery.

We can see this big upper level low just centered across eastern Canada.

And that's been providing us the unsettled weather over the past few days.

The other major thing that's going on is we have a big ridge that's pushing into the western United States that's keeping things quite warm out there.

By the time we get to Thursday, that ridge starts shifting eastward.

We still have remnants of this trough, however, on Thursday.

So I think we'll still have a cool day and a little bit of an unsettled day.

But that starts to push eastward and we start to begin to see this ridge of high pressure move in.

It really starts to dominate as we go into the upcoming weekend, when we see temperatures start rising, as well as a chance for some unsettled weather as well.

The moisture tracker, it's a measure of how much moisture is available in a column of air from the surface up to the cloud level.

On Thursday, we have that front that you already heard about.

It's pushing out to sea.

We get some cooler air moving in behind it.

We may have a few instability showers late Thursday behind that front, but not everybody is going to get wet.

I think Friday is going to be the best day, best chance to have a dry day.

Still coolish outside.

Things really change on Saturday.

That's when we start to see that southwesterly flow pushing in.

But notice the moisture tracker starting to see those values going up a little bit.

So I think there's going to be a chance that we could have some pop up showers, maybe a thunderstorm or two, not only Saturday, Sunday, but also into Monday.

And then that's ahead of a front that's going to be moving in once we get past Monday next week.

The other thing, temperatures are going to be rising still below average as we go into Thursday and then Friday.

But over the weekend, when we start to get that southwesterly flow, that's when the temperatures begin to rise.

It warms up Saturday into the 70s and 80s.

That continues into Sunday.

And then how about the start of the next workweek, getting into the 80s and maybe even tickling the 90s across the Southern Tier early next week.

So finally starting to feel like summer dew points.

Also getting up there to next Monday.

So our forecast is going to start out below average temperature wise, but we're really going to increase as we go towards next Monday.

That system moves out Thursday morning.

Just a little bit of rain in eastern Pennsylvania.

That moves out with the cool day and the cool air aloft.

We may have a few afternoon showers, but other than that, not too much to talk about.

I think the best chance for a bright day is going to be on Friday, but temperatures still below average, and then those temperatures start to skyrocket as we go into the weekend, near average on Saturday, and then above average both Sunday and Monday.

I think we'll have a mix of sun and clouds throughout that period and a chance of a few isolated showers, maybe some rumbles of thunder, but most places I think remain dry.

Monday, I think with the warm air and also those southwesterly winds, I think will start to feel a little bit of a touch of mugginess coming into the region as well.

And we'll be back in a moment with more.

Hopefully that bunnies got a warm spot to go overnight tonight.

Aside from far southwest and far southeast, a frost and freeze conditions will be fairly widespread.

Some areas in the north could be as cold as the mid 20s overnight tonight, cover your plants or any tender vegetation that you want to save.

As clear skies and light winds give way to this unseasonably chilly May night, Tuesday will be a bright day after the frosty start with lots of sunshine.

Temperatures will recover quite nicely from the upper 50s to the upper 60s a pretty pleasant afternoon.

High clouds will start to thicken in western PA, and if you're in far northwest PA, Crawford McKean counties, you could see a shower before the day is done, but the bulk of the rain waits until Tuesday night and into Wednesday.

That rain will spread from west to east across Pennsylvania.

Overall, a dull day.

There could be a few peeks of sun here and there, maybe even a few late day thunderstorms as well.

Temperatures once again in the 60s.

But again, some of this rain certainly needed.

And Marissa, for any folks who have been waiting to plant, I think tomorrow afternoon could actually provide a good opportunity and then everything will get watered on Wednesday.

All right, well, that's good news.

I have not planted yet, but I do feel for all the farmers.

The fruit farmers have had a really tough spring and another tough night tonight.

Okay.

Well thank you so much for that, Ben.

And thank you for joining us.

Come back again tomorrow night.

We'll have the latest edition of Water Watch.

We'll see you then.