Category: Forecast Discussion

Looking At The Week Ahead…

The second half of the weekend will feature beautiful weather, albeit breezy conditions at times.  Strong southwesterly winds will gust upwards of 40 MPH this afternoon, but also aid in pushing mid to upper 70s northward into central Indiana.  Despite the strong winds, we still recommend finding a way to get outside and enjoy this weather!

Highs will run close to 15° above average this afternoon.

Stormy weather returns Monday as a frontal boundary slips into the state.  A couple storms may become strong or severe Monday afternoon and the Storm Prediction Center highlights northwestern portions of the state for a Slight Risk.  Damaging straight line winds are of greatest concern with any severe storm that may develop.

High pressure returns for midweek and supplies a dry regime, along with increasing sunshine and temperatures that will run slightly above average (mid-40s at night and 65°-70° during the day).

There are questions once to the end of the period as the GFS and European handle the evolution of our late-week storm differently.  The GFS brings energy out into the Ohio Valley and results in unsettled weather returning Friday, continuing into Easter weekend, while the European is slower.  We’ll keep an eye on things over the next few days and update accordingly.  The GFS suggests some localized heavier downpours would be possible in the Friday-Sunday period as the majority of the 7-day precipitation snapshot below falls within the timeframe.

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Word On The Weeklies…

New JMA Weeklies stream in on Thursday mornings and we send out a Thursday morning report, in detail, to our clients dissecting the latest data, but want to try and start making public comments on the model here, as well.

The overall idea after looking at the JMA Weeklies is wet and warm over the upcoming (4) weeks relative to average. That said, there will be periods of drier times, especially Week 1, and late season chill- as can be expected every April.

Week 1:

Week 2:

Weeks 3-4:

The big picture is one that shows a drier pattern developing across the East during Week 1, but we caution that this drier regime doesn’t look to “lock” in.  Data suggests we get back to an active pattern between Week’s 2-4, biased wetter than normal in the Mid West and Plains.  The other screaming message is that a busy severe season should continue through the period.  Cold sets up across the Pacific Northwest, associated with the “mean” trough position, while spring-like warmth continues to build across our region in overall terms.  We know what that means as storms eject off the Rockies and track east…

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Monday Morning Rambles…

1.)  Showers moved through the region early this morning and we’ll go through several dry hours before dealing with our next round of rain and thunderstorms by evening.  Most widespread coverage of showers and thunderstorms appears to come in the 5p-7p range.

2.)  We’ll get a breather on Tuesday, but our next storm system will move in quickly and begin impacting central Indiana during the day Wednesday.  A couple strong to severe thunderstorms are possible Wednesday and will require our attention over the next day, or so.  We’ll have more details with our updated 7-day later today.

3.)  We’ll get into the colder side of the storm to close the work week and thoughts will shift from storms to snow.  Wind-whipped snow showers will be a good bet in the unseasonably cold air Thursday into Friday morning.

4.)  Timing will once again be our friend as we push into the weekend.  Weak high pressure will arrive on the scene and help ensure dry conditions.  After a cold start Saturday, a moderating trend will develop.

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Thursday Morning Rambles…

1.)  Morning showers and thunderstorms continue to impact north-central Indiana this morning and given the look to downstream trends on radar and satellite, it would seem like it’s going to be tough to get into any sort of significant sunshine this afternoon. This is great news as it’ll limit severe potential.  That said, we still can’t rule out a severe thunderstorm this evening with large hail and damaging straight line winds of greatest concern.  The updated (9a eastern) outlook from the Storm Prediction Center continues the “enhanced risk” for the southern half of Indiana.

2.)  We bracket the hours of 2p-8p (couple hours earlier from yesterday’s thinking) as the period of potential most widespread strong to severe thunderstorms across central Indiana, and the HRRR forecast radar shows what the radar may look like this evening. Have a means of getting the latest warnings.

3.)  Scattered showers will continue into Friday morning before drier air arrives during the evening hours.

4.)  This drier trend Friday PM is one that will continue into the weekend.  High pressure will supply mostly dry weather through the entire weekend (small shower chances return Sunday evening), including sunshine.

5.)  Another active period of weather awaits next week, including multiple rain chances early and late week.  The latter storm looks to be the bigger event with heavy rain and thunderstorm potential Wednesday into Thursday.  7-day rain numbers check in between 1.5″-2″ with locally heavier amounts.

6.)  The story becomes a chilly one next weekend, and models suggest central Indiana may be dealing with frost and freeze conditions by next Saturday or Sunday morning.

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Timing Thursday Storms…

Happy Wednesday!  Today’s sunshine sure was nice and I hope you had an opportunity to get outside and enjoy it.  Unfortunately, the pleasant weather won’t last as a storm system begins to impact central Indiana as early as the overnight period.  Clouds will continue to thicken tonight and showers and thunderstorms (non-severe) will arrive during the predawn hours.

We note short-term, high resolution, forecast radar data brings the initial wave of thunderstorms through the city during the 2a-3a time frame early Thursday morning.

Multiple rounds of showers and thunderstorms will likely impact central Indiana through the mid and late morning hours Thursday.

As we press into the early afternoon hours, model data suggests we see a “lull” in the stormy weather and potentially even a few breaks in the cloud cover.  This would serve to “up the ante” in regards to the prospects of severe weather potential Thursday afternoon, particularly mid and late afternoon through the evening hours.  Accordingly, the Storm Prediction Center continues to highlight central Indiana for the risk of severe weather Thursday.

In fact, given a look at the most recent data, I wouldn’t be surprised to see the “enhanced” risk area expand further north in future updates.  This would also include all modes of severe weather (large hail, damaging straight line winds, and potentially a tornado). As things stand this evening, we bracket the hours of 4p and 10p Thursday for the greatest potential of severe weather.

Forecast radar paints a stormy picture Thursday evening and, as mentioned above, a few of these storms could become severe.

As we push into the overnight hours Thursday into Friday, unsettled weather will continue, but we’ll get rid of the severe potential.  “Nuisance” type showers will continue into the first half of Friday before drier air arrives Friday afternoon and evening.  This drier theme will settle in for the weekend and provide a very pleasant open to April.

Ensure you remain weather-aware Thursday and have a means of getting the latest warnings.

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