SEVERE WX : Flood Warning View Alerts

August 26, 11:45 PM Weather Update

The highest heat indices since July & the tie for highest dew points of the summer.....latest on where we go from here......

Posted: Aug 26, 2018 10:31 PM
Updated: Aug 26, 2018 11:56 PM

After locally heavy rainfall Saturday morning (including up to 3.5" in Miami County) much run-off has occurred into the Wabash upstream from Lafayette.  That said, although the river levels at Logansport & Peru have crested after a quick, sharp rise to flood stage or a bit higher, Lafayette is projected to do so tonight a few feet above flood stage.  The river may make it or even exceed flood stage a bit in Fountain County in the next day or two.

Sunday was an oppressive one with the highest heat indices since July & a tie for the highest dew points of the summer. 

Also, the greatest deviations above normal (daily mean temperature) since June 18 occurred today as morning lows were well into the 70s with highs as high as the lower 90s.

The Heat Advisory issuance extended from much of Illinois to Newton, Jasper & Benton counties.  At Rantoul, Illinois the heat index reached 111 at the NWS/FAA AWOS station at the Rantoul National Aviation Center Airport with a peak dew point of 81! 

Sunday:

Peak dew points

  1.  81  Attica, Miles Farms
  2.  81  Fowler
  3.  80  Remington, Mary Anne's
  4.  80  Covington
  5.  79  Danville-Vermilion County Airport
  6.  79  Peru-Grissom Air Reserve Base
  7.  78  Crawfordsville Municipal Airport
  8.  78  Frankfort Municipal Airport
  9.  78  Kokomo Municipal Airport
  10.  78  Monticello-White County Airport
  11.  77  Logansport-Cass County Airport
  12.  77  Lafayette-Purdue University Airport
  13.  77  Rochester-Fulton County Airport
  14.  75  Crawfordsville, Campbell Ag Service

Note:  Rensselaer-Jasper County Airport AWOS & Winamac APRSWXNET stations appear to have issues with their dew point sensors.  They have been reading too low for a while & today was an example of that.  The automatic observations show a peak dew point of 70 on both stations. Practicing quality-control, I threw those observation sites out on both dew point & heat index lists.

Peak heat indices:

  1.  111   Fowler
  2.  110  Attica, Miles Farms
  3.  110  Remington, Mary Anne's
  4.  108  Covington
  5.  107  Frankfort Municipal Airport
  6.  107  Peru-Grissom Air Reserve Base
  7.  106  Danville-Vermilion County Airport
  8.  104  Rochester-Fulton County Airport
  9.  103  Kokomo Municipal Airport
  10.  103  Monticello-White County Airport
  11.  101  Logansport-Cass County Airport
  12.  100 Crawfordsville, Campbell Ag Service
  13.  100 Crawfordsville Municipal Airport
  14.    99 Lafayette-Purdue University Airport:

Maximum actual air temperatures:

  1.  92  Frankfort Municipal Airport
  2.  92  Remington, Mary Anne's
  3.  92  Fowler
  4.  92  Danville-Vermilion County Airport
  5.  92  Covington
  6.  91  Winamac
  7.  91  Kokomo Municipal Airport
  8.  91  Monticello-White County Airport
  9.  91  Rensselaer-Jasper County Airport
  10.  91  Crawfordsville, Campbell Ag Service
  11.  91  Rochester-Fulton County Airport
  12.  91  Attica, Miles Farms
  13.  91  Crawfordsville, Campbell Ag Service
  14.  90  Logansport-Cass County Airport
  15.  90  Peru-Grissom Air Reserve Base
  16.  90  Lafayette-Purdue University Airport
  17.  87  Crawfordsville Municipal Airport

Bow of severe storms with history of scattered wind damage is moving through western Lower Michigan now & will not have any affect on our weather tonight.

Check out all the rounds of severe storms to our north & northwest now-Tuesday night.  Meanwhile, we will be hot, humid to very humid, hazy, breezy & partly cloudy to mostly sunny.  Highs will run around 90 to as high as 93 Monday-Tuesday with heat indices near 100 to 106 & overnight lows in the muggy 72-76 range.

Still looks like a squall line will approach Tuesday night, but will move through our area in a weakening fashion.  It will be gusting out here after produding a lot of damaging wind from Iowa, Missouri & parts of Kansas to Illinois & Wisconsin.

The gust front may produce gusts of 30-35 mph in the area, it appears.  Some scattered/spotty weakening showers/t'showers are possible.  At this point, any severe risk here looks very low.  We will continue to monitor for changes, however.

By Wednesday morning, it will likely still be mostly cloudy in the area with some elevated showers & storms in central Illinois approaching north of the squall line's outflow boundary/gust front in southern Indiana & Illinois.

These showers/storms look to line up with the actual cold front.  It will still be muggy & warm & sticky Wednesday morning.

So, it appears that some elevated showers & storms are possible Wednesday morning-early afternoon.  Drier weather & less humid air should arrive behind the rainfall.  Highs will be cooler at near 80 to the mid 80s, but it looks muggy until later in the day as north to northwest winds arrive.

From the current standpoint, Thursday looks dry & less humid with highs near 80 to the lower 80s with the front stalled in southern Illinois & Indiana.  Wednesday & Thursday nights look pretty comfortable with lows in the upper 50s to lower 60s.

The front will move back northward, bringing renewed potential of showers & storms Friday to Saturday with muggy conditions & highs in the 80s to 90.

Sunday-Monday are a bit iffy due to lack of confidence on where exactly the front will set up, which determines where the storms also set up.

With some temperature ups & downs, however, temperature trend is still above normal right through mid-September.

Lafayette
Clear
35° wxIcon
Hi: 50° Lo: 25°
Feels Like: 29°
Kokomo
Partly Cloudy
28° wxIcon
Hi: 45° Lo: 24°
Feels Like: 28°
Rensselaer
Clear
28° wxIcon
Hi: 48° Lo: 22°
Feels Like: 28°
Lafayette
Clear
35° wxIcon
Hi: 49° Lo: 24°
Feels Like: 29°
Danville
Clear
33° wxIcon
Hi: 50° Lo: 25°
Feels Like: 33°
Frankfort
Clear
30° wxIcon
Hi: 48° Lo: 23°
Feels Like: 23°
Frankfort
Partly Cloudy
30° wxIcon
Hi: 46° Lo: 23°
Feels Like: 23°
Monticello
Partly Cloudy
30° wxIcon
Hi: 48° Lo: 23°
Feels Like: 30°
Monticello
Clear
30° wxIcon
Hi: 49° Lo: 24°
Feels Like: 30°
Logansport
Clear
30° wxIcon
Hi: 46° Lo: 24°
Feels Like: 30°
Dry, mild conditions continue.
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