December 2017 archive
Highlights:
- Lake effect squalls this afternoon
- Another arctic shot early next week
- Light snow chances
Hope You Like It Cold…Upper level energy is moving through the region this morning and is responsible for the scattered snow showers. Dry air “ate away” at the initial moisture and as a result we’re generally only looking at a dusting for most of central Indiana. The exception to that will be a narrow, but potentially intense lake effect snow band and embedded squalls that set up shop this afternoon. Under this band, an inch or two of snow will quickly accumulate.
Reinforcing cold, arctic air will pour into the state Monday night and Tuesday and will be accompanied by scattered snow showers. Another fast-moving disturbance will provide a shot of snow showers Wednesday night into Thursday.
All-in-all, no significant snow is on the horizon, but that may begin to change as Christmas nears. After brief moderation in the pattern next weekend, we’ll reload the cold pattern and likely see a stormy regime unfold, as well. Modeling suggests the southern stream will become more active in the weeks ahead…
Upcoming 7-Day Precipitation Forecast:
- Snowfall: 1″
- Rainfall: 0.00″
Permanent link to this article: https://indywx.com/2017/12/09/cold-week-ahead-light-snow-chances/
Highlights:
- Cold times
- First accumulating snow of the season
- Additional disturbances to monitor next week
Snow Arrives Late Friday Night And Early Saturday…75% of our Thursday featured overcast skies and periodic flurries and light snow. Thankfully, a bit of drier air is working in to provide a brighter close to the day. A cold night is on deck as many fall into the teens.
A fast moving upper air disturbance will drop southeast into the Ohio Valley Saturday. This will help spread a swath of snow across central Indiana overnight Friday into the wee morning hours Saturday. Additionally, we’ll have to monitor the potential of enhanced lake effect bands across central and east-central portions of the state Saturday morning into the early afternoon. In general, we expect 1″ to 2″ of snow to accumulate across central Indiana, but note there may be a couple of heavier totals where lake effect bands set up.
Another fast-paced disturbance will blow into town Monday night into Tuesday, followed by another Wednesday night into Thursday. Cold weather will dominate through the period.
Upcoming 7-Day Precipitation Forecast:
- Snowfall: 2″ – 3″
- Rainfall: 0.00″
Permanent link to this article: https://indywx.com/2017/12/07/fast-moving-northwest-flow/
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Permanent link to this article: https://indywx.com/2017/12/06/video-first-stab-at-weekend-snowfall-totals-busy-winter-pattern-is-only-just-beginning/
Highlights:
- Cold air settles in
- 1st accumulating snow of the season
- Active northwest flow pattern remains
Unseasonably Cold…Northwest winds helped usher in a much colder air mass Tuesday behind an early morning frontal passage. While a couple of flurries are possible Wednesday, we’re mostly dry through the midweek stretch. We’ll notice resurgent cold and wind Wednesday night into Thursday. Heavy winter gear will be warranted.
Eyes will then turn to an approaching clipper system in what’s just the beginning of a busy northwest flow regime. We expect clouds to increase Friday evening and snow to develop overnight, continuing into the day Saturday. Given the dynamics in play, we still circle this period for the first accumulating snow event of the season. Sure enough, latest model data is also trending snowier during this timeframe. Another snow event looms late Monday into Tuesday with fresh arctic air drilling south early next week…
Upcoming 7-Day Precipitation Forecast:
- Snowfall: 1″ – 3″
- Rainfall: 0.00″
Permanent link to this article: https://indywx.com/2017/12/05/cold-pattern-has-arrived-accumulating-snow-friday-night-saturday/
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Permanent link to this article: https://indywx.com/2017/12/05/video-much-colder-busy-clipper-pattern/
Highlights:
- Falling temperatures Tuesday
- Much colder
- Active northwest flow
Winter Engaged…Showers and embedded thunderstorms will rumble across the state during the overnight as a cold front draws closer. This is a “game changer” of a cold front, separating anomalous warmth over the past few days to a locked and loaded winter pattern. Temperatures will fall through the day Tuesday and just enough wrap around moisture will be present to support mention of evening flurries.
Morning scattered snow showers will continue early Wednesday before a reinforcing blast of arctic air blows into town at night. This will set up a frigid close to the work week and feature a fast paced northwest flow pattern into the upcoming weekend. We’ll have to remain very focused on upper level energy over the weekend. Models have been struggling (as expected given the pattern) on the specifics and we know this type regime can overachieve in the snow department. As things stand now, a period of snow showers with light accumulation still seems like a good bet Friday into Saturday.
Another (potentially more significant) snow event looms early next week…
Upcoming 7-Day Precipitation Forecast:
- Snowfall: 1″
- Rainfall: 0.25″ – 0.75″
Permanent link to this article: https://indywx.com/2017/12/04/here-comes-winter/
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Filed under Arctic Cold, Forecast Discussion, Forecast Models, Rain, snow, T-storms, Unseasonably Cool Weather, Unseasonably Warm, Weather Videos, Windy
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December 4, 2017
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Permanent link to this article: https://indywx.com/2017/12/04/video-partys-over-after-today/
Highlights:
- Showers and t-storms Monday night
- Turning much colder
- Snowy close to the work week
Changes Loom…We couldn’t have asked for a more delightful weekend to open December. Plentiful sunshine helped warm afternoon highs into the 55-60 degree range both Saturday and Sunday across central Indiana. We sure hope you found a way to get out and enjoy it as major changes loom.
A cold front responsible for ushering in these changes will blow through the state Tuesday morning. Ahead of the cold front, look for a line of showers and thunderstorms Monday night. For the most part, rain should be southeast of our region before the morning rush Tuesday. Winds will shift to the northwest and help usher in a much colder air mass through the day. This will set the tone for what the rest of the week will hold (and for that matter, most of the rest of the month).
Cold, dry conditions will be with us for midweek before a vigorous upper level disturbance races southeast across the Ohio Valley to close the work week. Snow showers and unseasonably cold conditions are a given Thursday night through Saturday morning and we’ll have to continue to monitor things closely for the prospects of the season’s first accumulating snow Friday. These type events have been known to “overachieve.”
The cold pattern is just setting in and shows no signs of departing in the longer range. Additional wintry “mischief” looms next week…
Upcoming 7-Day Precipitation Forecast:
- Snowfall: 1″ – 2″
- Rainfall: 0.50″ – 0.75″
Permanent link to this article: https://indywx.com/2017/12/03/winter-sets-in/
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Filed under AO, Arctic Cold, EPO, Forecast Discussion, Forecast Models, PNA, snow, Unseasonably Cool Weather, Unseasonably Warm, Weather Videos
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December 1, 2017
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Permanent link to this article: https://indywx.com/2017/12/01/video-winter-set-to-lock-in/
