Category: Winter Storm

Cold Today; Messy Monday Ahead.

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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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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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Snowy Weekend Ahead Or Not?

With today’s latest forecast model runs in house, we have excellent run-to-run consistency, the only problem is, that run-to-run consistency amongst each model continues to disagree with one another. We…

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Accumulating Snow Isn’t Finished

Good morning!  After a night complete with impressive snow totals, lightning and thunder reported downtown shortly after 6am, and significant drifting in the open country, things have “calmed” as of this post.  That said, the accumulating snow isn’t finished and will rotate back into central Indiana by late morning.

We think an additional 1-2″ of snow will fall with the highlighted area of snow below as it tracks east-northeast.  This snow is courtesy of the upper level low moving through the region.  Our storm total here at IndyWx.com HQ- 5 miles northwest of Zionsville is at 8.6″ so far.

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Permanent link to this article: https://indywx.com/accumulating-snow-isnt-finished/

Major Winter Storm Underway

11:00p update

Snowfall has been falling to “beat the band” the past couple hours across central Indiana.  Just within the past 54 minutes we’ve added 1.2″ here at IndyWx.com HQ in southeast Boone County.  Storm totals thus far are approaching 7″ as of this report.

While you’ll note the drier push of air invading portions of south-central Indiana, it’s likely accumulating snow continues across central Indiana, especially from the I-70 corridor and points north, becoming more widespread and growing in intensity yet again during the overnight.  The culprit?  The highlighted upper low which will “carry” accumulating snow east through the night into Wednesday…

ULDefZone

6:00p update

A major winter storm is underway and currently producing snowfall rates in excess of 1″ per hour across most of central Indiana.  We already have snowfall reports of 4-5″ coming in and those numbers will grow deeper and expand as we progress through the night.

This is a widespread winter storm and impacting a huge chunk of territory.  Here’s a look at the radar at 6:30, via Intellicast:

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Notice the moisture connection with the Gulf of Mexico.  Moisture-rich air continues to stream north into the cold air mass in place and resulting in extreme snowfall rates of 1-2″ per hour…these will continue through the evening before intensity improves late tonight.

The Storm Prediction Center has had to issue a mesoscale discussion to account for the heavy snow ratios.  Additionally, don’t be shocked if you hear a rumble or two of thunder tonight in the heavier snow bands.

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As we move forward, the dry slot, common with a mature cyclone, and discussed here originally Sunday will move northeast and result in a break in the snow across the region towards the 11 o’clock hour from the southwest.

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That said, snow will “fill” back in across central Indiana early Wednesday morning and produce additional accumulations.

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Much more later!

Permanent link to this article: https://indywx.com/major-winter-storm-underway/