Category: Forecast Discussion

Another Stormy Day Ahead…

The Storm Prediction Center includes the northwestern portions of the state in a Slight Risk of severe weather later this afternoon and evening.  Given the overall set-up and morning trends from data, it wouldn’t surprise us if this threat expands further southeast in future updates later today from the SPC.

Similar to Tuesday, any storms that develop will be capable of locally heavy rain and flash flooding.  While storms should move in a quicker fashion today, precipitable water values (PWATs) remain downright tropical and will exceed 2″ later this afternoon.

Overall storm coverage should become more widespread as we push into the afternoon and evening hours.  Here’s what the radar may look like during the 4p, 6p, and 10p time frames:

From a severe perspective, the biggest concern is damaging straight line winds with stronger storms.  Remain weather-aware later today, friends!

Permanent link to this article: https://indywx.com/2017/06/14/another-stormy-day-ahead/

VIDEO: Hot, Humid Weather Gives Way To Better Storm Chances…

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Permanent link to this article: https://indywx.com/2017/06/13/video-hot-humid-weather-gives-way-to-better-storm-chances/

Model Data Remains Consistent On A More Active Pattern Returning…

Today’s 12z model suite is in and it remains consistent on a more active weather pattern returning to the delight of many Hoosiers! A blend of the GFS and European 10-day rainfall numbers print out 2″ for Indianapolis.  The GFS ensemble ‘mean’ (a blend of 21 individual members) agrees.

Best overall coverage of showers and thunderstorms should come in (3) waves over the upcoming 10-day period:

  • Wednesday into Thursday
  • Saturday into Sunday
  • Middle parts of the following week

While we don’t see any sort of uniform type rains in the upcoming period, the “smattering” of storms should help most neighborhoods get in on the rainy “goods” at one time or another over the upcoming week and a half.  Keep in mind, we’re in mid-June now and it’s mighty difficult to ask for anything much more than scattered storms this time of year on through late-summer…unless a tropical entity gets involved.  That’s just the way this time of year is.  With that said, localized torrential downpours are a very good bet from time to time, beginning as early as mid-week, as precipitable water values approach, or exceed, 2″ (about as moisture-rich as you can ask the air mass to get around these parts) into the upcoming weekend.

As I type this outside on the back porch this evening, I hear the sounds of sprinklers in full-force through the ‘hood.  Thankfully, Mother Nature will help save on the water bill later this week.  Longer-term, you’ll hear us use the word “transient” many times this summer when discussing the overall weather pattern.  Thankfully that tends to result in a fairly busy time of things.  Before you know it, college football season will be back (83 days until my beloved Auburn Tigers kick-off), those wetter autumn storms will return, and thoughts will begin to shift to winter (they may have already started here :-))- not that we’re trying to rush summer away or anything…

Permanent link to this article: https://indywx.com/2017/06/11/model-data-remains-consistent-on-a-more-active-pattern-returning/

Developing Hot Pattern Doesn’t Last; Cooler And Wetter Times Loom…

Through the short-term, there are two words that will sum up Indiana’s weather: Dry and Hot.  We’re entering a stretch where the overall weather pattern will promote an expanding hot dome in the coming days, and put many communities across the state solidly in position to break the 90° mark on multiple days.

Expanding upper ridge means hot times loom late weekend into early next week.

However, this increasingly hot and dry pattern will be a transient one.  This morning’s European model shows the evolution to cooler and increasingly wet, unsettled times nicely as we progress into the 6-10 day period.

The GFS ensemble would also agree in the overall pattern shift back to cooler and unsettled conditions as early as mid-late next week.

The 10-day GEFS ‘mean’ is a beautiful sight as moisture returns.

Updated 7-day out later this afternoon!  Enjoy a beautiful Saturday, friends!

Permanent link to this article: https://indywx.com/2017/06/10/developing-hot-pattern-doesnt-last-cooler-and-wetter-times-loom/

VIDEO: Ready to heat things up this weekend?

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Permanent link to this article: https://indywx.com/2017/06/08/video-ready-to-heat-things-up-this-weekend/

VIDEO: Pleasant Weather Gives Way To Weekend Heat…

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Permanent link to this article: https://indywx.com/2017/06/06/video-pleasant-weather-gives-way-to-weekend-heat/

Dry Times Remain: Briefly Cooler Then The Heat Is On…

Our overall weather pattern will be dominated by short-term cooling, significant warming by the weekend, and dry times continuing.

We’re noticing a significant change to the brand of our air mass this evening as a northerly wind is taking hold and helping to usher in lower dew points.  This is only the beginning of a significantly cooler stretch of weather that will take us through the day Tuesday, continuing into Thursday.  While the upper level low will drift south into the Northeast, our region will be dominated by a northerly flow and a much cooler, refreshing air mass into the latter portions of the work week.

In fact, we forecast highs Wednesday to only top the upper 60s, and this will be a good 10°-15° below average for June 7th.  Lows each morning through Friday will start out in the lower-middle 50s for the city, itself, but some outlying neighborhoods will fall deep into the 40s.  Very refreshing, indeed, for early June!

High pressure will dominate our weather through late week, continuing the overall drier than normal theme.

Models slowly begin to increase moisture levels as we move into the weekend and an isolated shower or thunderstorm could develop, but widespread rains of significance aren’t anticipated for the foreseeable future.

The bigger story by the weekend will be a developing hot weather pattern.  Temperatures will be flirting with the 90° mark as early as Sunday and Monday.  Instead of running 10°-15° below normal such as midweek, temperatures by early next week will be running 5°-10° above normal and very much like the “heart” of summer.

Permanent link to this article: https://indywx.com/2017/06/05/dry-times-remain-briefly-cooler-then-the-heat-is-on/

Storms May Rumble In Later Today; Cooler For Midweek…

We’ve enjoyed a warm and beautiful weekend, and most of Sunday will follow that pleasant them.  However, a cold front will drop south into the state later today and this “trigger” mechanism, combined with the heating of the day, will likely spark a broken line of thunderstorms.  These storms will sink south into central Indiana later this evening, and a couple of storms could become strong.

Modeled radar shows how things may evolve later this evening, including time stamps at 5p, 8p, and 10p.

Most significant rainfall will occur across the northern half of the state, including a couple of 1″+ totals in the heavier storms.

As we push into the midweek stretch, cooler, refreshing air will take up residence across the region.  Temperatures will run significantly cooler than average, including lows in the upper 40s for some Wednesday and Thursday morning and highs only in the upper 60s to lower 70s.  Dry weather will continue, as well.

Permanent link to this article: https://indywx.com/2017/06/04/storms-may-rumble-in-later-today-cooler-for-midweek/

JMA Weeklies: Cool Gives Way To More Seasonal Conditions…

The new JMA Weeklies are in and the highlights include:

  • Unseasonably cool conditions Week 1
  • Anomalously wet across the Southeast
  • Warmer, more seasonal early-summer weather arrives

Week 1:

The pattern is dominated by an eastern trough and western ridge. Accordingly, cooler than average conditions will dominate the central and eastern portions of the country.  Very wet conditions should dominate the southern and eastern tier of the country (heaviest rains should fall east and south of Indiana).

Week 2:

The pattern begins to “relax” a bit, locally, with warmer conditions set to develop.  We note three areas of anomalously wet weather- west coast, northern Plains and Southeast.

Weeks 3-4

While the pattern doesn’t seem to promote any sort of significant heat or cool (relative to normal), this is certainly a warmer look, overall, to close the month than how we’re starting.  This look would suggest warm, seasonal, summer conditions locally with average precipitation.  Wet weather continues to dominate the pattern across the south and begins to emerge into the central.

Permanent link to this article: https://indywx.com/2017/06/01/jma-weeklies-cool-gives-way-to-more-seasonal-conditions/

Challenging Northwest Flow Remains…

The region will remain in a challenging northwest flow for the balance of the upcoming 10-14 day period.  This can play havoc with forecast models, particularly from a timing standpoint.  In short, expect a continuation of active weather, including wetter and cooler than normal conditions.

Another weak disturbance will kick up a few scattered showers and potentially an embedded thunderstorm tonight.  Similar to Monday, this will come after a gorgeous day.

Forecast radar at 1a Wednesday shows scattered showers still impacting portions of the state:

The majority of our midweek stretch looks rain-free, but more widespread showers and thunderstorms will return as we push into the weekend.  Recent trends have also slowed the FROPA (frontal passage) down significantly- now perhaps not until late Sunday.

There will be dry time this weekend, but with a moisture laden air mass in place, locally heavy downpours can be expected, including rainfall potential of 1″+ this weekend for neighborhoods that get under a heavier storm.

Longer-term, modeling continues to suggest a cooler than normal pattern persists as we push through the first half of June.

In fact, there may be a couple of days early next week where highs struggle to reach 70° with lows in the upper 40s to lower 50s.  Very refreshing, indeed, for early June.

Permanent link to this article: https://indywx.com/2017/05/30/challenging-northwest-flow-remains/

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