Category: 7-Day Outlook

Focus On Mid Week Flood/ Storm Threat…

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35/ 50

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Accumulating snow?

Forecast Updated: 02.19.14 @ 8:00a

One More Calm Day…A weak front blew through early Wednesday and produced a light shower for southeast parts of the state.  Sunshine will return Wednesday along with a blustery northwest wind.  It’ll be another mild day.

Concern For Flooding And Severe…With continued melting of a deep snow pack, combined with around an inch of rain (most of which falls within a 3 hour time period Thursday) and the stage will certainly be set for flooding.  In fact, we remain very concerned for flooding Thursday. If you live in a flood prone area, please prepare to seek higher ground Thursday as flood waters rise.

The second concern is a severe potential Thursday evening.  While the greatest threat for severe weather will remain south and east of our immediate region, we’ll have to be mindful of the potential of damaging straight line wind gusts Thursday evening.  The greatest threat lies between 5PM and 8PM Thursday as a line of thunderstorms pushes east through the state.  Again, damaging straight line winds, in excess of 60 MPH, is our greatest concern at present time.  Stay tuned.  Drier and much colder air will roar in behind the front Thursday night on strong and gusty northwest winds.

Weak Weekend Disturbances…A couple of fast moving disturbances will pass through the region this weekend and could spark scattered snow showers in the much colder air.

Accumulating Snow Early Next Week…Model data continues to struggle in the mid range handling energy coming east before what continues to look like a big blast of arctic air to wrap up February.  As of now, we’re targeting Tuesday for best chances of accumulating snow, but stress this a low confidence forecast in regards to timing at present.  Stay tuned.

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Permanent link to this article: https://indywx.com/2014/02/18/focus-on-mid-week-flood-storm-threat/

Sunday Afternoon Thoughts…

1.) A scan over the latest data continues to point towards an absolute mess of a Monday afternoon.  Our accumulation ideas remain relatively unchanged from this morning’s update, aside from “beefing” expected snow totals for Indy’s northern ‘burbs by 1″.  Most of this falls from noon to 6pm and will be followed by a dry, cold, and blustery Monday night.  After likely a white-nuckle evening commute Monday, the combination of sub-freezing temperatures and gusty northwest winds Monday night will likely lead to another rough commute for Tuesday morning.

** We caution that this will be another “now cast” situation when it comes to precipitation types and their respected precise zones tomorrow afternoon.  Stay tuned here or to your favorite local weather media for updates and potential changes.**

  • Indianapolis northern ‘burbs, including Zionsville: 2-4″ snow and sleet with less than 0.10 of freezing rain.
  • Indianapolis proper: 2″ snow and sleet with around 0.10 of freezing rain
  • Indianapolis southern ‘burbs, including Greenwood: 1″ snow and sleet with up to 0.25 freezing rain.

Snow:IceForecast021714

2.) We continue to monitor what will be a brief thaw and associated flood risk mid week.  Even without rain, water rise would occur and urban flooding from the combination of melting snow and blocked (from all of the snow) drainage zones.  When you add 0.50-1″ of rain atop the melting then problems could arise Wednesday into Thursday.  Additionally, we’ll need to prepare for the likelihood of dense fog Wednesday as milder air surges north over a deep snow pack.

3.) For anyone thinking spring is setting in during our mid week thaw will need to think again. Latest model data continues to suggest we reverse things quickly later this week and for the upcoming weekend.  In fact, some model data, including the European, suggests central Indiana is under the gun for a weekend winter storm.  We’ll continue to monitor closely…

021614ECSatWinterStorm022214

4.)  Additionally, prospects continue to grow for another extended period of well below normal cold and renewed wintry precipitation chances in the long term (into March).  Both the GFS and European models are in agreement on the mid to long range pattern with a trough settling back into the eastern half of the country.

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Permanent link to this article: https://indywx.com/2014/02/16/sunday-afternoon-thoughts/

Cold Today; Messy Monday Ahead.

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20/ 39

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1-3″ (and ice)

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Forecast Updated 02.16.14 @ 11:15a

Cold Sunday…Fresh off celebrating our snowiest winter on record (surpassed last night at IND at 51.6″ and the Record Event Report can be found here), we’ll enjoy a dry day, but blowing and drifting snow will remain an issue in the open country. A few breaks in the cloud cover can be expected this afternoon on what will otherwise be a rather cloudy day.  Highs will only climb into the lower to middle 20s (well below the average high of 40 and closer to the normal low of 24).  Yes, our cold, snowy winter just keeps on keepin’ on!

Snow And Ice Issues Monday…A storm system will move through the region Monday and deliver a mixture of precipitation types across central Indiana.  The way we see things unfolding as of this forecast update brings a wintry mix of sleet and snow into the city around noon with periods of moderate to even heavy wintry precipitation falling into the mid to late afternoon hours before we begin to see the shield of moisture push northeast.  This will be a “thump and go” type event.

As for precipitation type, this remains a challenge and will require much fine tuning later tonight and through the day tomorrow (another now cast scenario).  We’re thinking mostly snow is the dominant form of precipitation from the northern suburbs of Indianapolis and points north.  Here, 2-3″ of wet snow is possible, polished off with a light glaze of a freezing rain/sleet mixture before precipitation ends.  For the city, itself, we think around 1-2″ of snow is possible with a glaze of freezing rain of around a tenth of an inch. Farther south, to include the southern Indianapolis suburbs, an icy mixture of sleet and freezing rain will be the concern with glaze potential approaching one quarter inch.  Again, we caution this is our best idea at this point and we’ll post some fresh thoughts later this evening.

Needless to say, tomorrow stands to include treacherous driving conditions in and around central Indiana and the National Weather Service will likely issue Winter Weather/ Freezing Rain Advisories later this afternoon to account for the wintry conditions anticipated tomorrow afternoon.

Flooding Concerns On The Rise…With such a deep snowpack across central Indiana, combined with a frozen ground, flooding concerns will be on the rise as early as the middle to latter part of the week.  We think dry and chilly (albeit milder) conditions will be with us Tuesday, but low clouds, fog, and drizzle likely develop by Wednesday as milder air streams north over the snowpack locked in across the region.

By Thursday, our attention turns to the potential of heavy rain and a couple of thunderstorms as a cold front blows through the region.  Early ideas of Thursday rainfall numbers would suggest anywhere from .50-1″ of rain is laid down and when combined with the heavy snow pack and milder air, flooding concerns will certainly be present.  Needless to say, if you live in a flood prone area, please monitor the situation closely later this week.

Winter Blows Back In…As promised, the briefly milder shot of air would be just that- brief.  We continue to monitor data that suggests a colder, more wintry, pattern blows right back into the region to wrap up February.

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Permanent link to this article: https://indywx.com/2014/02/16/cold-today-messy-monday-ahead/

Saturday Morning Notes…

* Your full, updated, 7-Day Forecast will be published later tonight. 1.) In the long range, credit the Canadian model for being spot on with yesterday’s snow storm.  It was…

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Permanent link to this article: https://indywx.com/2014/02/15/saturday-morning-notes/

Valentine’s Day Snow

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Forecast Updated 02.14.14 @ 11:00a

Accumulating Valentine’s Day Snow…The Canadian led the charge and other modeling has followed suit.  The region will deal with accumulating snow Valentines Day as low pressure moves southeast out of Missouri into the Tennessee Valley.  We think snow will fall at a good clip, periodically heavy, and begin around mid morning around the city.  In fact, a strip of 2-5″ of snow is likely to be laid down between Indianapolis and Louisville later today.  Latest radar trends from upstream and banding features suggest snowfall amounts may reach 6″ along the I-70 corridor. Needless to say, if you have travel plans this afternoon plan for snow covered roads and slick travel.

A fresh shot of arctic air will drill south into the region tonight and result in Saturday “wake up” temperatures in the single digits with a biting northwest wind.

Another Fast Moving Clipper…After a mostly dry Saturday, we forecast light snow to build back into the region Saturday night into early Sunday.  This will only be a light snow event and most amounts will be in the dusting to 1″ category.  The sun should quickly return Sunday afternoon, though it’ll remain colder than normal.

Foggy Start To The Week…As a southerly air flow transports milder air north and over the snow pack across central Indiana fog will develop.  It’s possible some freezing drizzle is dealt with Monday morning before temperatures rise above freezing.  Prepare for a downright gloomy start to the work week.  A cold front will push through the region Monday evening and lead to a period of showers, potentially transitioning to light snow or a light wintry mix Monday night as cold air sweeps back in.

A Spring Tease…A spring tease will have many Hoosiers wanting to break out the shorts by the mid week period.  In fact, highs will zoom into the 60s Thursday, courtesy of a strong and gusty southwest breeze.  The downside?  A line of showers and gusty thunderstorms later in the day.  While we still have a week to monitor this situation, the possibility is there for a few storms to reach severe levels across the Ohio Valley region.  Stay tuned as we monitor this developing weather situation.

Looking longer term, we anticipate the briefly milder spring “tease” to be just that.  Signals are increasingly favorable for a prolonged period of cold, wintry conditions building back into the region as we put a wrap on February and head into March.

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Permanent link to this article: https://indywx.com/2014/02/13/valentines-day-snow/

Accumulating Valentine’s Day Snow

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Forecast Updated 02.12.14 @ 7:50a

Midweek Moderation…While still cold (and still below normal), temperatures will begin to moderate from the frigid readings of the past few days.  Additionally, we’ll continue to enjoy sunny skies both today and Thursday, though we’ll add a gusty southwest breeze into the mix Thursday.

Accumulating Late Week Snow…We’re eyeing two fast moving clipper systems that will deliver accumulating snow for late week.  The first snow event moves in Friday followed by a second snow maker Saturday.  Both have the potential to produce a couple inches of snow across the region and we’ll be able to fine tune these amounts over the next day, or so.

Rainy And Milder…A push of milder air will move in early next week.  Unfortunately, the milder air will come at a cost.  With the heavy snow pack on the ground combined with the warmer air moving in from the southwest we’ll be looking at a gloomy period, including a couple waves of rain.

A push of colder air will swoosh back in here Tuesday night and could lead to a wintry mix before precipitation end.  Looking longer term, we’re still expecting a “taste of spring” late next week!

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Permanent link to this article: https://indywx.com/2014/02/12/accumulating-valentines-day-snow/

Tracking Late Week Snow…

Tue. Wed. Thr. Fri. Sat. Sun. Mon.             -12/ 1 0/ 27 9/ 36 22/ 30 12/ 28 14/ 29 25/ 39  0.00” 0.00″ 0.00”…

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Permanent link to this article: https://indywx.com/2014/02/11/tracking-late-week-snow/

ANOTHER Bitterly Cold Air Mass

Mon. Tue. Wed. Thr. Fri. Sat. Sun.               -1/ 12 -12/ 15 0/ 27 10/ 37 19/ 24 3/ 25 20/ 34  0.00” 0.00″…

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Permanent link to this article: https://indywx.com/2014/02/09/another-bitterly-cold-air-mass/

A Snowy Weekend On Tap

Sat. Sun. Mon. Tue. Wed. Thr. Fri.               5/ 24 16/ 28 -1/ 16 – 9/ 12 – 3/ 26 8/ 34 23/ 33 …

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Permanent link to this article: https://indywx.com/2014/02/08/a-snowy-weekend-on-tap/

Bitterly Cold And Snowy Pattern Rolls Along…

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Forecast Updated: 02.07.14 @ 8:07a

Frigid Close To The Work Week…Arctic high pressure will be centered over the Ohio Valley as we close out the work week.  While this will lead to a mostly sunny sky, downright frigid conditions can be expected.  The day will dawn with temperatures solidly below zero and include wind chill values as cold as 30 degrees below- a painfully cold start to the day, needless to say.

Watching A Weekend Snow Maker…We continue to keep a close eye on the weekend as another round of accumulating snow waits on deck.  Questions remain as to just how much snow accumulates and while model data continues to suggest we’re only looking at a light, 1-3″, weekend snow event at the moment, the chance is still there that modeling begins to trend a little more “robust” with upper level energy as it crosses the Ohio Valley.  High snow ratios will be at play here, meaning we’ll squeeze out more than the usual 1″ of snow for every 10th of an inch of liquid.  We bracket Saturday afternoon into Sunday morning as the best chance of accumulating snow, but note this timing could change as we move through the next 24 hours.  Stay tuned.

Weekend Snow Bookended By A Bitter Feel…A fresh blast of bitterly cold air will pour into the Ohio Valley and Mid West region to kick off the new work week.  Temperatures will average more than 20 degrees colder than seasonal levels to begin the new work week and feature at least one, if not two, night(s) below zero.  The brutally cold, snowy winter of 2013-2014 just keeps on keeping on…

Watching The Southern Stream…Model data is really struggling in the longer term and it has to do with how each respected model set handles energy in the southern and northern branch of the jet stream.  We’re taking a “middle of the line” approach for now, including chances of snow the middle of next week.

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Permanent link to this article: https://indywx.com/2014/02/06/bitterly-cold-and-snowy-pattern-rolls-along/

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