Category: Long Range Discussion

Tracking Multiple Storm Systems Between Now And Month’s End…

As Thanksgiving and the “official” kickoff to the holiday season nears, the weather pattern sure appears as if it’ll become a bit more hectic and busy in nature. In the short-term, we’re forecasting another significant wind event Thursday. While likely not to the magnitude of what we saw across central IN last Sunday, sustained southwest winds of 20-25 MPH will develop Thursday with gusts approaching 50 MPH.

That leads us to Friday and the upcoming weekend. While most of the day Friday will be rain-free, we’ll notice a lowering and thickening cloud deck by afternoon and evening and light rain will eventually follow. This has to do with a “wavy” frontal boundary that will be draped across the central Ohio Valley. It was only a couple of days ago where most modeling pegged this frontal boundary to lie across the southern Great Lakes region (which would’ve led to a warmer and drier weekend, locally). Alas, we can expect periods of light rain and chilly weather Saturday with heavier, steadier rain arriving Sunday as the cold front sweeps through the region. Drier and cooler air will then filter into the region as we progress through the early parts of Thanksgiving week, itself.

Model data agrees that between 1″ and 1.3″ of rain will fall across immediate central Indiana with this event (total between Friday night and Sunday). Officially, on a broader scale, we’ll forecast 0.75″ to 1.25″ with locally heavier amounts possible.

After a quieter couple of days to open Thanksgiving week, itself, we’re tracking 2 additional storms next week. The first will likely arrive Wednesday with gusty showers and blustery conditions.

The 2nd storm system will blow into town Friday and Saturday. The trade-off in between, if we’re lucky, will be a pleasant (seasonably cool and dry) Thanksgiving holiday.

To no surprise, the European ensemble sees a wetter than normal close to the month upcoming, including a good chunk of the Ohio Valley, Southeast, and East Coast.

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Another Strong Wind Event On Deck; Weekend Turns Unsettled, And Looking Ahead To Early December…

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Thanksgiving Nears: Now All We Can Do Is Watch Things Play Out…

We continue to watch substantial changes in the high latitudes and the modeling (on a daily basis) is being forced to correct towards more of a blocky look by Thanksgiving week. My suspicion is this has to do with Phase 2 of the MJO.

This morning, note the changes highlighted from now (image 1) to the 2 positives beginning to combine (image 2) to eventually form more of a high latitude ridge, or block (image 3).

Lack of any sort of blocking observed presently. As such, the chilly air masses that do impact the region are very transient.
Changes begin taking place next week as 2 separate areas of high pressure form over AK and Baffin Bay/ Greenland.
That then forms a more “mature” high latitude block by Thanksgiving.

By the time we get to Thanksgiving, note how there’s a totally different look and a pattern has ‘suddenly’ developed that can drive cold air (in more of a sustained manner) south into the Lower 48- particularly eastern portion of the country.

This doesn’t just happen overnight, but what we should begin to see on the modeling is more substantial cold shots for the last 10 days of November, including the threat of some sort of wintry “fun and games” from the Plains, stretching out to the Great Lakes and interior Northeast around Thanksgiving, itself. (Too soon to call for the OHV).

My suspicion is this is all thanks to the MJO. Note how the European continues to slow things in Phase 2 (a cold phase this time of year for our portion of the country).

The question then becomes “can we take things back into Phase(s) 7, 8, and 1 in December (all traditionally cold phases).

Or do we roll right into Phases 3, 4, 5, and 6 (all big time warm phases). That’s what our December forecast hinges on and we’ll keep a very close eye on things. Stay tuned.

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Coming To A Fork In The Road: Long-Winded Discussion Where The Pattern Is Headed Late Nov and Dec…

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VIDEO: A Lot On The Table Over The Next Couple Weeks…

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