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Dec
12

Freezing Fog Impacting Northeastern Indiana

Posted By · December 12, 2014 at 11:55 pm

Caution is advised if you’re traveling into the northeastern corner of Indiana overnight into early Saturday.  Reports of a heavy mist that’s freezing on contact and creating slick roads, with numerous accidents in Whitley and Allen counties.  A Freezing Fog Advisory is in place up there until 7am and includes Marion, Peru, Hartford City and Fort Wayne.

FREEZING FOG ADVISORY PLANNER MORNING

Though isolated pockets of freezing fog or drizzle are possible farther south… it shouldn’t be a widespread problem.  However the stagnant air in place across central Indiana is.  The combination of a strong temperature inversion (warm air over cold air), light wind and overcast allows pollutants to build to unhealthy levels this weekend.  In my 17 years I can’t recall a Freezing Fog Advisory and Air Quality Action Alert at the same time.  The Air Quality Alert includes of the Indianapolis metro area and surrounding counites as well as Munice and Kokomo.

AIR QUALITY ACTION DAY AIR QUALITY ACTION DAY 2 RPM 4PM PLANNER AFTERNOON

Conditions remain cloudy and stagnant Sunday… though temperatures gradually warm to near 50 degrees Sunday afternoon.  Some mist and fog is possible again early Sunday, but much of the day is dry.

RPM SUN 4PM COLTS HIGHS SUNDAY 7DAY

 Rain becomes likely Monday afternoon as the first of two systems to impact us next week arrives.  Colder air returns Wednesday and may set the stage for a potential wintry weather maker across the Ohio Valley and Great Lakes.  This may mark the transition to a stormy change to the overall pattern for the second-half of the month.  Stay tuned and check back for updates.  Have a great weekend – Sean Ash

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Dec
12

Cloudy Weekend With Unhealthy Air Quality

Posted By · December 12, 2014 at 4:42 pm

**** Air Quality Action Days This Weekend Due To Stagnant Air/High Particulates****

Low cloud overcast arrived a few hours earlier than expected for most of the region today.  Underneath this blanket of gray it’s chilly with temperatures in the low to middle 30s.  Eastern Indiana reaps the reward of geography today with the clouds to arrive last there.  That gives way to an increasing low cloud deck tonight.

VIS1KM CONNERSVILLE INDY

Central Indiana will be stuck under this cloud blanket for at least the next 48 hours, as warm air (near 50 degrees) at 4-5,000 feet traps colder air (30s) at the surface.  This temperature “inversion” prevents very little “mixing” of the atmosphere… breeding low cloudiness, haze, fog and mist at ground level.  Air particulates will also gather and reach levels that are unhealthy for groups with sensitive respiratory systems.  If you’re in the group you’ll need to minimize outdoor time this weekend.

AIR QUALITY ACTION DAY AIR QUALITY ACTION DAY 2 TEMPERATURE INVERSION PLANNER EVENING

Tonight:  The clouds due serve as insulation overnight and keep temperatures fairly steady in the lower 30s.  Areas of low visibility are possible along with some patchy drizzle.  The
“blanket” keeps lows near freezing as opposed to near 20 Friday morning under a clear sky.

RPM RPM 7AM PLANNER MORNING RPM 4PM PLANNER AFTERNOON

The Weekend:  Afternoon high temperatures struggle into the lower 40s Saturday, hold steady Saturday night and creep to near 50 degrees Sunday afternoon… despite remaining overcast.  So it’s a cloudy, cool tailgate for the Colts game Sunday at Lucas Oil Stadium.

RPM SUN 7AM RPM SUN 4PM COLTS RPM SUN 5PM HIGHS SUNDAY

Rain becomes likely Monday afternoon as the first of two systems to impact us next week arrives.  Expect rain to continue Monday night into Tuesday morning.  Colder air returns Wednesday and may set the stage for wintry precipitation next weekend.

RPM MONDAY EURO

Long range models continue to indicate signals of winter weather maker in the eastern U.S. heading into next weekend.  Though at this time there remains a good deal of uncertainty regarding strength, location, temperature profiles.  It’s on our watch and we’ll post updates between now and then and keep you update.

EURO 2 7DAY

Check back for updates on a highly changeable long range forecast.  Have a great weekend – Sean Ash

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Dec
11

Cold Start Friday Morning And Clouds Return This Weekend

Posted By · December 11, 2014 at 11:47 pm
A layer of clouds will depart by sunrise Friday morning and allow for a seasonably cold night in Central Indiana.  You’ll need the heavy coats in the morning with temperatures in the lower to middle 20s.  Wind chills will likely be in teens for the bus stop.
LOWS TONIGHT PLANNER FRIDAY
We’re advising that you soak up what will be the brightest day of the next seven on Friday.  After the chilly start afternoon highs creep into the lower 40s with a light wind.
RPM RPM SATURDAY MORNING RPM SATURDAY 7AM
A strong temperature inversion plays role of sun spoiler this weekend.  A layer of warmth at 5,000 will essentially trap colder air at the surface and help for low cloudiness to develop.  The end result will be slower warming than initially anticipated and highs Saturday in the lower to mid 40s.  Though Sunday is dry, it will likely remain fairly cloudy.  However there may be enough mixing the second half of the weekend to allow temperatures to near 50 degrees.
HIGHS SATURDAY RPM SUNDAY 7AM RPM SUNDAY 4PM
Either way our next chance of considerable precipitation will be Monday into Tuesday with a period of rain.  This system brings a return to seasonably chilly temperatures Wednesday and Thursday.  We’ll need to watch the end of next week for our next chance of snow.  Have a great evening – Sean Ash
HIGHS SUNDAY 7DAY

 

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Dec
11

Dry Streak Stays

Posted By · December 11, 2014 at 3:23 am
The chill stays, but the sun comes out today. A north northwest wind will be the main cause of us not being allowed to get out of the 30s today. Still, a dry streak will continue for several days.
There will be a mix of clouds and sun on  Friday.  Highs will be in the upper 30s on today and in the lower 40s on Friday.
We are still forecasting a gradual warming trend into the weekend, that will bring high temperatures into the upper 40s and lower 50s. Even though it won’t be a completely sunny day, it does appear we should get close to 50 for the Colts game Sunday. The next best chance for rain is later Monday and Tuesday.
On This Date in Central Indiana Weather History……
1967 : Tornadoes in Daviess and Knox Counties destroy a house trailer and damage several farm buildings.

Daypartextended

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Dec
10

Cold Now but Milder Air in the Forecast

Posted By · December 10, 2014 at 4:26 pm
The clouds are holding tough across central Indiana.  We do expect some clearing over the next few days.  Temperatures overnight are forecast in the range of 25-30 degrees.
planner
There will be a mix of clouds and sun on Thursday and Friday.  Highs will be in the upper 30s on Thursday and in the lower 40s on Friday.
We are still forecasting a gradual warming trend into the weekend, that will bring high temperatures into the upper 40s and lower 50s.  The next best chance for rain is later Monday and Tuesday.
7DAY
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Dec
10

Staying Cool Today… Warm Up on the Way

Posted By · December 10, 2014 at 11:11 am

Cloud cover will keep us cool around Central Indiana today, but just wait until you see the weekend forecast!

Highs remain below our “normal” high of 40 for this time of year.  We’ll only top  out in the mid 30s today thanks to the stubborn clouds.

new wednesday planner

Tonight the clouds break and temps fall into the 20s.

We will enjoy more sunshine tomorrow, but temperatures will remain cool with highs still struggling to reach the 40 degree mark.

A big warm up comes our way for the weekend more sunshine.  By Sunday we could hit 50!

Soak up the dry time while you can, more rain is back in the forecast by Monday.

new wednesday 7 day

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Dec
09

Winter Chill

Posted By · December 9, 2014 at 4:26 pm
It is cloudy, cold and breezy and it will stay that way Tuesday night.  A few flurries are still possible, as temperatures fall into the middle and upper 20s.
The chill is here to stay through at least Thursday.  Morning clouds will give way to a bit of sunshine later Wednesday.  Highs are only forecast in the middle and upper 30s.
planner RPM rpm1
Highs will be stuck in the 30s on Thursday too, but we should see a bit more sunshine.
Clouds return on Friday, as a milder air mass starts to move our way.  Highs will be in the 40s on Friday.  We are forecasting upper 40s and lower 50s for the weekend.
Some of the latest analysis shows a slight chance for a stray shower early Sunday.  We will keep it out of the forecast for now, with the better chance for rain arriving later Monday into Tuesday.
7DAY
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Dec
08

Rain Will Change to Snow Overnight

Posted By · December 8, 2014 at 10:42 pm

By late Monday evening, temperatures were still above freezing across central Indiana.  Light rain continued to fall, but the colder air was close.  There were snow reports across Illinois.

The colder air will continue to push into central Indiana overnight and the rain will start to change to snow.  We are not forecasting an accumulating snow, but bridges and overpasses could be a bit slick early Tuesday, with temperatures near freezing.  Highs on Tuesday will only be in the middle and upper 30s.  There will be a few snow showers and flurries scattered across the area on Tuesday.

rpm2 planner

The rest of the 7 day forecast is quiet, with cold air expected through Thursday.

7DAY

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