Hot Dome Arrives

Welcome to the beginning of a multi-day stretch of stuffy conditions.  Heat indices already nearing 100 degrees in Central Indiana and most top out at that mark for several hours this afternoon.

HEAT INDEX 4PM HI

The Heat Advisory technically begins Friday at 10am and lasts until Saturday at 8pm.  But it will be plenty uncomfortable prior and after that time frame.

FRI HI HEAT ADVISORY

While heat steals the headlines, and rightfully so, remember we’ll dealing with locally heavy storms Friday into Sunday afternoon.

RADAR

We’re monitoring a storm complex over Lake Michigan and it’s possible by late day it could approach the far northern and northeastern portions of the WTHR viewing area… including cities like Peru, Marion and possibly as far south as Kokomo.

friday 5pm

This places Central Indiana in the firing line Friday into the weekend.  While there’s a daily storm chance there will also plenty ample dry time to allow highs to jump into the 90s with dangerous heat indices in the 100 to 110 range.

SPC FRIDAY

HEAT INDEX WEEKEND

Stay safe and take the heat seriously this weekend friends – Sean Ash

Heat Advisory Issued For Central Indiana

Late day heat indices across Central Indiana have hit 90 degrees and higher… with the exception of rain-cooled Putnam County.  Greencastle’s experiencing one of the isolated showers on Live Doppler 13 Radar.

temps current heat index

We don’t expect much coverage this evening or tonight, but rain/storm chances remain in the forecast each day into Monday afternoon.

The time for talk is just about over, and we’ve been talking about the impending heat wave since last week.

HEAT ADVISORY

Though our forecast hasn’t changed much since then… the National Weather Service in Indianapolis made it somewhat official today with the issuance of Heat Advisory to begin for most Friday and carryover into Saturday.

However it should be noted that heat and humidity will be uncomfortable Thursday too and deserves your attention to limit outdoor activity.

NORTH HEAT INDEX

You can already see the oppressive triple figure heat indices in the central U.S. where a large chunk of real estate is under an Excessive Heat Warning.  As expected these continue to expand eastward with the building hot dome.

HOT DOME FRIDAY MORNING

We noted in the forecast Tuesday there would be “ridge runners” or clusters of rain and heavy storms building/tracking on the edge of the hottest air.  We’ll need to watch for these locally heavy rain-makers Thursday and again Friday morning as we’ll be close to the “lid” that caps the atmosphere from storms.

HEAT WARNINGS HEAT ADVISORY DMA

Anyway you slice it conditions for Brickyard 400 will be less than ideal.  If you’re heading to IMS either Friday, Saturday or Sunday you’re going to need to take the heat seriously.

Latest indications suggest the high heat/humidity combo lasts into Monday along with scattered heavy storms.  Check back for updates – Sean Ash

THURSDAY HI FRIDAY HI SATURDAY HI

PLANNER

HEAT INDEX BARS 7DAY

Possibly Hottest Stretch Of Days In Indianapolis Since 2012

You can definitely feel the difference the sun is making today in Central Indiana with temperatures returning to the mid and upper 80s and 10 to 15 degrees warm than 24 hours ago.

TEMPS 24HR CHANGE INDIANS

It will be a warm evening at Victory Field for Indianapolis Indians baseball and only a slight storm chance heading into tonight.

7PM TODAY MIDNIGHT 5AM

We’re monitoring a storm complex in southern Iowa and widely scattered storms across Illinois.  These should stay west of the metro area but could impact western and southwestern Indiana late evening and tonight.

Muggy temperatures in the 70s with a light wind leads to more areas of dense fog Wednesday morning.

TONIGHT WEDNESDAY

Temperatures rapidly jump into the 80s by noon Wednesday and near 90 degrees to finish the day with a chance of storms.

HOT DOME 1

There will be considerably more dry weather than storms the next 24 hours, but we’re certainly not ruling out locally heavy storms the next few days with Central Indiana being on the edge of the “hot dome” centered in the Central U.S.

HOT DOME 2

In the core of the “hot dome” the atmosphere has a lid over it to suppress storm development… much like the lid over a boiling pot of water on the stove.  But around the “lid” storms erupt, like steam from the boiling pot of water, in highly unstable, moist air to deliver quite a punch as they track east-southeast.  We call these storms Ridge Riders as they go up and over the center of upper ridging in the jet stream.

HEAT HEAT 2

Heat Warnings/Watches/Advisories to our west likely expand into Central Indiana with expected heat indices peaking out in the 105 to 110 range Friday into Sunday afternoon.

THURSDAY FRIDAY SATURDAY SUNDAY HEAT INDEX CHART

If our forecast highs verify… it would mark the first time since the summer of 2012 Indianapolis has had four consecutive days of highs at/above 93 degrees.

7DAY

This will make it one of the hottest Brickyard 400 weekends ever in Indy and demands the attention of anyone expecting to spends long spells outside.  Stay tuned for updates and thanks for reading the forecast – Sean Ash

Record Rain Today

It was quite the wet and stormy Monday in Central Indiana with the bulk of rainfall occurring in a four to five time period.  Widespread 1″ to 3″ rain amounts fell with some areas seeing 4″ to nearly 6″.

The Indianapolis International Airport finished with a daily record rainfall for this date with 2.71″ so far.  Again that mainly occurred in fours and was more than the rest of the month combined!

WETTEST MONTHS

This balloons the summer total for the city over 12″.  This comes on the heels of the wettest month on record last July and one of the wettest summers on record last year too.

WETTEST SUMMERS

TEMPS OHV TEMPS

Our local atmosphere is fairly worked-over and this should make it tough for new development in Central Indiana.  In fact we’ll likely finish with some welcomed sunshine.

We are going to monitor for storm development in Central Illinois where it’s much warmer and more unstable.  Storms that initiate there would likely target southwestern Indiana but deserves monitoring given the saturated ground.

INDIANS TONIGHT HIGHS WEDNESDAY

After morning dew and mist diminishes… you’ll be able to cut away on the yard tomorrow and have ample time later this week.

CUT CAST

However we do expect additional storm clusters between Tuesday night and Friday morning in the Ohio Valley/Great Lakes, but it’s impossible to pinpoint timing and location.

Hot air and dangerous heat indices of 105 to 110 become the headline heading into Brickyard 400 weekend.  Stay safe and check back – Sean Ash

7DAY

 

Thunderstorm Watch Until 2am Northwestern Indiana

Severe Thunderstorm Watch for northwest Indiana until 2am includes Benton, Cass and White counties.  Widely scattered storms in northern Illinois will gradually build east-southeast and may ultimately arrive in Central Indiana by 4-5am.

WATCH THREATS TONIGHT

While widespread severe weather isn’t expecting, locally severe wind or a brief tornado is possible farther the next few hours.  Otherwise heavy rain, frequent lightning and gusty wind can be expected with most storms tonight into the Monday morning rush hour.

1AM 5AM

It will be much warmer and more humid tonight and that will be the theme this week.  Several bouts with storm clusters can be expected the next several days.

8AM MORNING MONDY AFTERNOON

This is due to Central Indiana being on the edge of the “hot dome” in the Central U.S.  Timing and track are highly uncertain at this time, but periods of heavy storms are possible before the hot dome slides farther east to put a “lid” over Central Indiana and deliver likely the hottest air of the year.

7day

Highs late week into the weekend climb into the mid and upper 90s with heat indices in the 100s.  Stay tuned and stay safe – Sean Ash

Locally Heavy Storms Next 24 Hours

One wave of storms diminished over the Indy metro area but more storms remain in play this evening and overnight.  Although heavy rain and lightning are the most likely storm threats, localized severe wind gusts are possible in stronger storms the next 24 hours.

RADAR RADAR 2

Although heavy rain and lightning are the most likely storm threats, localized severe wind gusts are possible in stronger storms the next 24 hours.

SPC SPC 2

Scattered heavy storms dot Central Indiana Monday and it’s fair game for a storm from sunrise to sunset.  Some storms tomorrow may be severe and we’ll keep storm chances in play nearly everyday this week.

THREATS PLANNER monday

This is due to Central Indiana being on the edge of the “hot dome” in the Central U.S.  Timing and track are highly uncertain at this time, but several bouts of heavy storms are possible before the hot dome slides farther east to put a “lid” over Central Indiana and deliver likely the hottest air of the year.

JET STREAM 7day

Highs late week into the weekend climb into the mid and upper 90s with heat indices in the 100s.  Stay tuned and stay safe – Sean Ash

Stormy Evening Ahead

Oppressively humid air in Central Indiana produces heat indices near 100 degrees today and the tropical air leads to heavy hitting storms too.  Some areas likely pick up a quick 1 to 2 inches of rain…possibly in under a couple of hours.

HEAT INDEX THREATS

While widespread severe doesn’t seem likely, we do expect a few severe wind reports and even a brief tornado remains possible with any boundary interactions.  Storm coverage is expected to increase after 4pm and many locations likely see rain or storms this evening.  Be sure and remain weather aware with the potential for severe weather.

5PM TODAY 9PM 11PM MORNING

Storms diminish after midnight but the humid air hangs tough heading into Thursday.  Sticky air combined with heavy rains this evening produces areas of dense for the morning commute tomorrow.  Additional scattered storms develop Thursday mainly during peak heating when highs reach the mid-80s and heat indices in the 90s.

TONIGHT STORM CHANCES MUGGY METER

We continue to maintain a slight storm chance for Friday but less humid air should arrive to begin the weekend with lows nearing 60 degrees Saturday morning.  Still looking like an active and hot pattern next week with a daily chance of storms – Sean Ash

7DAY

Warming Up This Week

We’re enjoying another nice day in Central Indiana of sunshine and scattered clouds.  Humidity remains tolerable and allows temperatures to drop back into the lower 60s later tonight.

4 CAMS TONIGHT LOWS TONIGHT

A comfortable start Monday morning before temperatures rapidly rise into 80s.  Sky conditions will be similar tomorrow and Tuesday… but there is a chance of isolated storms Tuesday afternoon and humidity continues to climb.

MONDAY MORNING MONDAY AFTERNOON HIGHS TOMORROW

Enjoy the comfy heat for now as the jungle humidity returns mid-week to feed heavy storms for a few days.  Some of the storms could be severe too and please check back for updates.

MUGGY METER 7DAY

The front triggering these storms sets up south of the area by Friday morning to set the stage for more pleasant weather Friday and Saturday.

Have a great evening – Sean Ash

Chance Of Storms Tonight

Thankfully cloud cover put the kibosh on severe weather in Central Indiana… displacing it farther south again across southern Indiana and Kentucky.

TEMPS SPC TEMPS OHV SPC OHV

We’re not completely out of the woods regarding severe weather but at this time I don’t anticipate widespread severe weather.  However, anything that does develop and move across the region likely produces heavy rain, frequent lightning and locally severe wind.

THREATS INDIANS PLANNER TONIGHT

Storm chances Friday may be highest in the morning but pop-up storms remain in play during the afternoon with the approach a cool front.

PLANNER MORNING PLANNER AFTERNOON

The local Muggy Meter remains oppressively high until the weekend when less humid air arrives and sets the stage for a pleasant Saturday and Sunday.

MUGGY METER 7DAY

Long range prospects suggest upper 80s to near 90 this time next week.  Please check back for updates – Sean Ash

Muggy Night Ahead Followed By Severe Storm Threat Thursday

It’s been quite the day in Central Indiana.  After starting with heavy storms and localized flooding rain we’re now enjoying some welcomed sunshine.  Though highs likely fall well short of the forecast upper 80s… it’s certainly going to feel that warm due to tropical dewpoints in the 60s and 70s.

TEMPS RADAR SPC

For now we’re expecting a mainly dry evening but will need to monitor the northern periphery of a storm complex in southern Illinois.  But I believe it weakens when encountering the used-up atmosphere over Central Indiana due to the deluge that started today.

PLANNER TONIGHT PLANNER MORNING PLANNER AFTERNOON

Confidence of any overnight/early morning storms redeveloping remains low due to the lack of forcing and a “cap” in the atmosphere.  We’re going only slight chances tonight and focus more on the Thursday afternoon-Friday morning time frame for potentially widespread damaging wind.

THREATS SPC W

It’s still early in the game and changes to placement and timing are likely the next 24 hours.  But there’s an increased risk of damaging wind from a complex or perhaps multiple complexes of storms riding down from the northwest.

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Be weather aware tomorrow and Friday and we’ll post updated timing/severity info as the event begins to take better shape Thursday morning – Sean Ash