Wednesday Morning Weather Rambles…

1.)  Talk about number-busting cold.  With a fresh snowpack and clear skies overnight, temperatures plummeted (even colder than some high resolution data suggested yesterday evening). Officially, it’s the coldest December morning in Indianapolis since Christmas Eve 2013.  We note even a few communities below zero (talking about you Crawfordsville, Zionsville, and Greenfield).

Even colder air rushes in tonight behind a secondary arctic cold front.  Expect an increase in cloudiness, scattered snow flurries, and strengthening NW winds by late afternoon and early evening.  As the reinforcing bitter air pours into the region, wind chill values will fall to 10-20 below zero tonight into Thursday morning.  That’s dangerous stuff, friends, and requires limited time outdoors.  The National Weather Service has issued a *Wind Chill Advisory* 10p this evening until 11a Thursday.

gfs_windchill_indy_62.)  Our next storm will approach Friday evening. Clouds will increase and thicken as the day gives way to evening and a wintry mix of snow, sleet, and freezing rain will overspread central IN Friday night.  With snow on the ground and the recent bitter blast, we have concerns the cold air won’t be “dislodged” as quickly as last weekend.  The end result may be a period of accumulating freezing rain/ sleet Friday night into early Saturday morning.  We’ll keep a close eye on things.

nam_ptype_slp_mc_25Regardless, icy precipitation will transition to rain during the day Saturday as temperatures briefly surge above freezing.  “Brief” is the key word there as temperatures plummet Saturday night, courtesy of fresh arctic air oozing back in.  A secondary wave of moisture may result in additional wintry issues Saturday night.  Additionally, with sharply colder air returning, “flash freeze” concerns loom Saturday night, as well.

3.)  Another “lobe” of arctic air will plunge into the area Saturday night and help set-up a frigid close to the weekend.  We’ll have to be on sub-zero watch again.

d44.)  Our attention then shifts to what may very well be an active Christmas week in the weather department.  We continue to think the frigid times of this week will relax.  That said, it’ll remain cold enough with a favorable storm track to result in wintry issues as Christmas nears.  Far too early for specifics with this 10+ days out, but keep it in the back of your mind that the weather pattern continues to look active and at least present a threat of wintry precipitation at times Christmas week.

ecmwf-ens_z500a_us_10

Another Arctic Shot Inbound…

screen-shot-2016-12-11-at-2-49-00-pmHighlights:

  • Even colder this week than last
  • Light snow chances
  • Bigger storm next weekend

Bitterly Cold Week Ahead…We’ll kick off the work week with mostly dry, but mostly cloudy and continued cold conditions.  Be careful if traveling early in the morning as some refreezing may take place across central IN during the overnight.

Reinforcing arctic air will begin to blow into town mid week and an area of light snow may precede this next arctic punch to the gut Tuesday.  Scattered snow showers and flurries will fly in the bitterly cold, arctic, air mass Wednesday and Thursday.  Along with highs only in the teens Thursday, expect below zero wind chills.

Eyes will then shift to the end of the week as our next storm of significance approaches.  This storm appears to be stronger than this past weekend’s system, but similar to this weekend’s overall pattern, we expect a “mild up” and mostly a liquid event across central parts of the state.  The primary reason?  Lack of high latitude blocking to keep the storm track south (more on that in another post later tonight or Monday).  Add in a “feisty” southeast ridge that keeps flexing it’s muscle and you have the makings for what’s likely another cutter to the Lakes.  Unlike this current event, we will have to keep an eye on a potential second wave of moisture moving along the front Sunday as the arctic air returns.

Upcoming 7-Day Precipitation Forecast:

  • Snowfall: 1″ – 2″
  • Rainfall: 0.75″ – 1.00″

Busy Winter Pattern…

screen-shot-2016-12-07-at-7-59-56-amHighlights:

  • Arctic air blows in tonight
  • Winter storm potential this weekend
  • Another blast of arctic air next week

Busy Times Ahead…The fun and active winter pattern has arrived and will keep us forecasters on our toes as we go through the next couple weeks.  Early sunshine will give way to an increasingly cloudy sky this afternoon and a couple snow flurries or scattered light snow showers may precede the arctic plunge this evening.  Snow lovers, unfortunately the arctic wave didn’t materialize as we once thought.  (Hang in there, you have many more snow opportunities ahead).  We’ll turn windy tonight and wind chills will fall into the single digits by Thursday morning.  We’ll stay dry, but cold to wrap up the work week.

Eyes will then shift to the weekend as a developing storm system pushes snow into the region Saturday night.  Snow and/ or a wintry mix will continue Sunday.  Where this remains all snow, it’s likely to be a “plowable” event.  We still need to fine tune the details over the next couple of days to hone in on just where the mixing line will set up.  Thinking now is that from Indianapolis and points north, this is mostly a snow event, but stay tuned.

Another round of snow and wind will blow into town early next week.  This will likely be ahead of an even colder push of air by the middle part of next week.

Upcoming 7-Day Precipitation Forecast:

  • Snowfall: 3″ – 5″
  • Rainfall:  0.10″ – 0.25″

Sunday Mix; Heavier Winter Gear Needed Next Week…

screen-shot-2016-12-03-at-9-48-58-amHighlights:

  • Sunday mix
  • Wet Tuesday
  • Midweek snow and turning bitter

Winter Awaits…Today is chilly and dry. Thankfully, we’ll finally get to see the sun.  Enjoy it into the afternoon as clouds will quickly increase yet again later in the day as our next storm system approaches.

Speaking of that next system, moisture will spread into the chilly air mass Sunday morning.  Across central IN, this will fall as a wintry mix of light snow and chilly light rain.  Further north, this will be a mostly snow event, including a light accumulation possible (slushy amounts under 1″) across far northern portions of the state.  All-in-all, this won’t be a big deal.

We’ll have a brief break in between systems Monday before rain returns at night.  This is courtesy of another wave of low pressure lifting out of the northwest Gulf of Mexico, tracking northeast through the TN Valley and into southeastern Ohio.  Central Indiana snow lovers know that’s a classic track for snow around these parts this time of year.  We’ll keep an eye on it, but as of now, the air mass doesn’t look cold enough (yet).

A much colder pattern looms by the middle of next week.  Along with the arrival of the arctic air mass, we also favor a wave of low pressure delivering accumulating snow prospects Wednesday night into Thursday.  (That high Thursday will come at midnight with temperatures crashing through the day).  We’ll turn bitterly cold to close the week, including wind chills falling to around zero.

This is only the beginning of a very cold and wintry period.  There are plenty of “fun and games” awaiting as we rumble through the next couple weeks…

Upcoming 7-Day Precipitation Forecast:

  • Snowfall: 1″ – 3″
  • Rainfall: 0.75″ – 1.25″

Periods Of Rain; T-storm Chance Tonight…

screen-shot-2016-11-28-at-7-57-02-amHighlights:

  • Rain turns heavy tonight; Storm threat, too
  • Trending colder to open December
  • Next storm arrives over the weekend

A Wet Kick-Off To The Work Week…Moisture is streaming northeast over the Hoosier state this morning and this is really just the beginning of a wet and, eventually, stormy open to the work week.  We may see a brief “lull” in the rain around the lunchtime hour, but heavy rain will increase in coverage this evening and continue into tonight.  Additionally, we’ll introduce thunder into the mix this evening.  In fact, some of the higher resolution, short-term, forecast models hint at a skinny line of thunderstorms that may impact central IN tonight.  Strong wind gusts are of biggest concern with this line.  Here’s an idea of what the radar may look like around 8p.

8phrrrConsiderable cloudiness will remain Tuesday and Wednesday, but both days will be much drier than today.  A secondary wave of low pressure will move northeast along a pressing cold front Wednesday.  Best rain chances Wednesday will fall across eastern sections of the viewing area.

The second half of the week will trend colder.  A sprinkle or flurry is possible Thursday.  The next storm we’re tracking will arrive over the weekend.  Clouds increase Saturday and Sunday offers up the next good chance of rain.  Though details are sketchy at this point, the prospects of a storm system with more wintry significance may arrive just beyond the 7-day period.  Stay tuned.  December is looking quite active and wintry…

Upcoming 7-Day Precipitation Forecast:

  • Snowfall: Trace
  • Rainfall: 1.50″ – 2.00″