Category: Forecast Discussion

Turning Significantly Warmer Towards The End Of The 10-Day Period…

The upcoming 10-days will run cooler than normal, overall, but it’s the cool on the front end that will be most noticeable before a nice warming trend develops towards the weekend and into early parts of Week 2.

After a chilly work week (relative to average), 60s will return this weekend and temperatures will zip into the lower and middle 70s early next week, before approaching 80° by the middle of next week.

Despite the showers that will impact central Indiana today, it’s mostly a dry pattern over the upcoming 10-day period.  Additional rain chances will continue Tuesday (scattered, nuisance-level) and with a frontal passage Friday. With that said, 10-day rainfall will only run between one half and three quarters of an inch for most of the region.

The majority of the Ohio Valley will run drier than normal through the period.

Permanent link to this article: https://indywx.com/2018/04/23/turning-significantly-warmer-towards-the-end-of-the-10-day-period/

VIDEO: Weekend Weather Rambles…

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Permanent link to this article: https://indywx.com/2018/04/21/video-weekend-weather-rambles/

VIDEO: Beautiful Friday And Looking Ahead To Next Week…

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Permanent link to this article: https://indywx.com/2018/04/20/video-beautiful-friday-and-looking-ahead-to-next-week/

Midweek Weather Rambles: Calmer Times On The Horizon…

I. It’s a state divided this afternoon with winter across the northern third of the state (most are in the 30s), seasonable spring conditions central (low-mid 60s), and 70°+ downstate. Unfortunately, we’ll all turn colder tonight and as low pressure scoots east across the Ohio Valley, it’ll help pull a swath of wet snow across the northern half of Indiana after midnight through the predawn hours Thursday.  Further north and northeast, a wet accumulation of an inch or less can be expected.

II.  We’ll turn cooler to close the week, but with an increasingly sunny time of things, we forecast a very pleasant open to the weekend.  High pressure will remain in control of our weather into early next week.  Really the only item of interest will be a gusty easterly breeze at times Sunday into Monday.  We’ll watch a storm system get shunted south and stay dry here.  Overnight lows will remain chilly through the weekend.

III.  The next opportunity for meaningful precipitation should arrive the middle of next week (Tuesday-Wednesday) time frame, and even this doesn’t look like a big deal.  From this distance, it seems like 0.10″ to 0.25″ will come from that system.

IV.  As we look ahead, the relative cold looks to relax as we put a wrap on April and open May.  Additionally, we also note the EPS painting much of the northern tier into the Ohio Valley with a drier than normal signal.  Sure looks like conditions are finally improving for #Plant18 to get underway in earnest…

Permanent link to this article: https://indywx.com/2018/04/18/midweek-weather-rambles-calmer-times-on-the-horizon/

VIDEO: Gusty Storms For Some Wednesday PM Then Calmer Times Arrive…

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Permanent link to this article: https://indywx.com/2018/04/17/video-gusty-storms-for-some-wednesday-pm-then-calmer-times-arrive/

Looking Ahead To The Merry Month Of May…

Folks are growing tired of the cold and snow, and for good reason; it’s mid-April for goodness sakes.  As of today, we’re currently ranked as the 5th snowiest spring (March-May) in recorded history, with Indianapolis recording 14.2″ thus far.  By the way, we’re only .3″ from moving into the 4th place spot.

With that said, it’s not just April that’s been unusually cold and snowy, but the entire year thus far.  As of April 15th, year-to-date CONUS temperatures are running more than 1° below average:

More specific to Indianapolis, here’s the monthly temperature breakdown so far for 2018:

  • April: 5.7° below normal (MTD)
  • March: 3.3° below normal
  • February: 5.6° above normal
  • January: 3.0° below normal

As we look ahead, there are a couple of key items that we’re monitoring closely to get a better idea as to where this pattern is heading as we rumble into the merry month of May:

NAO- does it show signs of finally flipping to a positive state with any sort of duration?

MJO- does it go into the “wheelhouse” or continue to rumble into the milder phases (5 and 6 this time of year)?

The North Atlantic Oscillation (NAO) is a bit troubling as it shows signs of heading towards a negative phase once again as we open the month of May.  This would promote the threat of colder than normal temperatures continuing in early May. With that said, May is the first month of the next several (until winter returns) where the overall influence of the NAO state begins to lessen it’s grip.  Unlike from the mid and late winter months into the early spring (Jan through April), mid and late spring, through the fall, isn’t controlled by the NAO.  With May being a “transition” month, we’ll favor a colder than average pattern continuing during the early portion of May as the NAO looks to trend negative.  As we move towards mid and late month, we won’t rely on the NAO like we have been lately as the said influence “wanes.”

The Madden Julian Oscillation (MJO) is forecast by most data to head towards the “null” phase.  The consensus of modeling takes it into the wheelhouse after traversing Phase 3 (present) which is a cold phase.  The end result?  Unfortunately, we can’t rely on the MJO with any sort of confidence from this distance for the month of May.

Looking at the data itself, the CFSv2 and European Weeklies (just to name a couple) show conflicting ideas.  The CFSv2 (courtesy of weatherbell.com) is in the warmer than normal camp for May while the NEW European Weeklies (courtesy of weathermodels.com) suggest the chill lingers throughout the month.

While we have conflicting temperature ideas, both suggest a drier than average month emerging:

At the end of the day, our call on May’s forecast from mid-April would be for an early cooler than average start before flipping towards more of a seasonable to slightly warmer than normal regime.  Our idea all along this spring has been that when this pattern flips, the potential is present to jump right to a summery feel.  In the face of the new European Weeklies, we still feel this warmer idea mid and late May is on the table.  We’re in agreement with the data of a drier than average month.

Permanent link to this article: https://indywx.com/2018/04/16/looking-ahead-to-the-merry-month-of-may/

VIDEO: Wintry Feel To Open The Week And Longer Range Thoughts…

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Permanent link to this article: https://indywx.com/2018/04/16/video-wintry-feel-to-open-the-week-and-longer-range-thoughts/

VIDEO: Cold And Snowy Open To The Work Week…

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Permanent link to this article: https://indywx.com/2018/04/15/video-cold-and-snowy-open-to-the-work-week/

Week Ahead: Cool Continues To Dominate…

A significant spring storm system will continue to grab headlines through the short-term. In addition to a raging blizzard across the northern tier into the Great Lakes, severe weather will be an issue across the deep South today.  Here on the home front, morning rain will give way to drier conditions for the afternoon and evening hours only to return yet again tonight and into Sunday morning.

At times, rain will fall at a moderate to heavy intensity tonight into Sunday, especially across the eastern half of the state.  Additional rainfall totals of 1″ to 2″ can be expected in and around the city, itself, and points east.

The other item of interest tonight will be the tight temperature gradient across the state.  Don’t be surprised by perhaps as much of a 30° spread from north to central parts of the state this evening as the “backdoor” cold front begins to drop south.  You’ll certainly notice once the front passes.

Eventually, cold will overwhelm and the second half of the weekend will wrap up on a downright “raw” note.  As precipitation wraps around the area of low pressure Sunday night and Monday, it’ll fall as snow here.  In fact, snowfall intensity is likely to be great enough to put down a coating in spots Monday morning across central Indiana.

Drier weather returns Tuesday before a weak weather system deliver gusty winds and a possible shower Wednesday (not a big deal).  The majority of the upcoming week will run well below average- highlighted by the coldest day on Monday and reinforcing chill Thursday and Friday.

Our next storm system of significance will be slated for an arrival next weekend. While we’ll have to fine tune timing as we get closer, plan on increasing rain chances as the day progresses next Saturday.

Permanent link to this article: https://indywx.com/2018/04/14/week-ahead-cool-continues-to-dominate/

VIDEO: Looking At The Weekend And Next Week…

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Permanent link to this article: https://indywx.com/2018/04/13/video-looking-at-the-weekend-and-next-week/

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