September 21, 4 PM Weather Forecast Update

Latest on rainfall timing Sunday.

Posted: Sep 21, 2019 3:39 PM
Updated: Sep 21, 2019 4:17 PM

We are already seeing earmarks of the winter regime a bit.  The unseasonably cold weather in western & central Canada (high of 33 with low near 20 with snow in Calgary, Alberta next week [with many trees that will still be fully-clothed in foliage, even if it is in the process of changing color] & hard freezing on the move southward into the Rockies) & the unseasonable hot upper ridge in the Southeast with more mid 90s & record warmth for the South & then moving up into the Northeast.

It is a battle that the Southeast ridge is showing signs of winning as it expands again by next weekend.

It still looks like some of that cold in Canada, the Rockies & Northern Plains may be discharged in early October.

These extremes will be a winter mainstay with a lot of cold & warm extremes & "Polar Vortex" episodes interspersed with sudden mass thaws with t'storms & spring warmth.  High wind events will buffer the extremes (like last winter).

Should average out between all the fluctations colder, wetter & snowier than normal.

________________________________________________________________________________________

MARGINAL RISK of severe weather is up viewing area-wide for Sunday.

I think that if there is an upgrade to SLIGHT RISK anywhere, it would be from south-central Illinois, through Missouri to Oklahoma, not here.

We will monitor.

Any rainfall morning through afternoon looks very spotty & brief as main area of rainfall slows down.

With this slow-down it may rain heavily & storm west of us all night tonight through Sunday.  Given already high rivers from recent heavy rainfall from the Plains to western & northwestern Corn Belt, the 3-8" totals will lead to a lot of flash & then renewed river flooding.

This means a windy (south to south-southwest 15-30 mph) & drier Sunday & a very warm to hot one, too (with clouds/sun).  I went for highs back to 84-90 (heat indices 88-94) after only 69-74 tonight.  Much of the area will be 87-90, while the northwest will be a bit cooler at 84.

Note the line of storms with bows & LEWPs Missouri to Illinois by Sunday mid- to late-afternoon & all of the heavy rainfall.

This should move eastward & impact our northwestern counties by 4 p.m., get to Benton County by 5:30 p.m. & train over that western/northwestern county zone through 8 p.m. before it makes more headway eastward into Tippecanoe County & the heart of the viewing area.

Line will gradually weaken as front gradually becomes anafrontal, but the risk of an isolated severe storm or two is up from 4-9 p.m. for the viewing area.

Widespread rainfall in a band should follow the line Sunday night.

Line should continue to weaken to next to nothing more than a wind shift & cool down once it exits our area.  It will substantially outrun the band of rainfall as cold front becomes completely anafrontal (rainfall occurs nearly completely behind the front as winds at mid-levels completely parallel the surface frontal boundary).

Any lingering showers will exit Monday morning, followed by partly cloudy skies & highs 70-76 with areas of fog & lows of 47-51 Monday night.

It appeared that two bands of heavier rainfall would set up in our area in yesterday's data:  northwest areas & southeast areas (2" amounts) with an overall 1-2" rain area-wide.

Latest data suggests the western & northwestern areas may see 1-2.5" of rainfall, while the rest of the area sees 1" of rainfall or a bit less.

Next potential of any rainfall (after low to mid 70s highs Tuesday) would be Tuesday late evening-night & again Wednesday late (highs 75-80 Wednesday).

Count on summery weather next weekend with 85-90 after 80-85 Friday & 70s Thursday.

Warm front will surge northward, bathing us in warmth & humidity with strong south to southwest winds.  This will occur as very potent Southeast U.S. subtropical ridge re-expands to the north & northwest.

Storms are possible perhaps Saturday night to Sunday with some severe risk.  We will monitor.

West Lafayette
Clear
79° wxIcon
Hi: 86° Lo: 64°
Feels Like: 80°
Kokomo
Clear
80° wxIcon
Hi: 87° Lo: 63°
Feels Like: 80°
Rensselaer
Clear
81° wxIcon
Hi: 86° Lo: 63°
Feels Like: 80°
Fowler
Clear
79° wxIcon
Hi: 87° Lo: 63°
Feels Like: 80°
Williamsport
Clear
83° wxIcon
Hi: 87° Lo: 62°
Feels Like: 83°
Crawfordsville
Clear
81° wxIcon
Hi: 87° Lo: 62°
Feels Like: 81°
Frankfort
Clear
81° wxIcon
Hi: 86° Lo: 62°
Feels Like: 81°
Delphi
Clear
82° wxIcon
Hi: 88° Lo: 64°
Feels Like: 81°
Monticello
Clear
82° wxIcon
Hi: 89° Lo: 66°
Feels Like: 81°
Logansport
Clear
81° wxIcon
Hi: 86° Lo: 62°
Feels Like: 80°
Warm and windy with plenty of sunshine!
WLFI Temps
WLFI Planner

Indiana Coronavirus Cases

Data is updated nightly.

Cases: 947918

Reported Deaths: 15377
CountyCasesDeaths
Marion1291181990
Lake635721103
Allen53899761
Hamilton44082449
St. Joseph42122590
Elkhart33803491
Vanderburgh30574449
Tippecanoe26915251
Johnson23727418
Hendricks22410342
Porter21832347
Clark17562231
Madison17492385
Vigo16302285
Monroe14545191
LaPorte14389239
Delaware14183222
Howard13971273
Kosciusko11498135
Hancock10935166
Warrick10737178
Bartholomew10635170
Floyd10514208
Wayne10077226
Grant9213204
Morgan8928160
Boone8463111
Dubois7791123
Dearborn769490
Henry7691133
Noble7466101
Marshall7409128
Cass7219118
Lawrence7026153
Shelby6647111
Jackson661386
Gibson6190107
Harrison609386
Huntington604495
Montgomery5853105
DeKalb581091
Knox5535104
Miami548888
Putnam543268
Clinton537465
Whitley529354
Steuben501768
Wabash488692
Jasper483861
Jefferson474492
Ripley457777
Adams446068
Daviess4231108
Scott409165
Clay394957
White393858
Greene393392
Wells389884
Decatur388797
Fayette378578
Posey362341
Jennings356056
Washington334747
LaGrange325175
Spencer321136
Fountain318455
Randolph317190
Sullivan309449
Owen287064
Starke282864
Fulton280454
Orange277859
Jay257038
Perry254152
Carroll245229
Franklin242838
Rush237030
Vermillion235050
Parke221420
Tipton212055
Pike211740
Blackford170534
Pulaski168551
Crawford147318
Newton145845
Benton143916
Brown135846
Martin130217
Switzerland126910
Warren115616
Union98511
Ohio80511
Unassigned0482

COVID-19 Important links and resources

As the spread of COVID-19, or as it's more commonly known as the coronavirus continues, this page will serve as your one-stop for the resources you need to stay informed and to keep you and your family safe. CLICK HERE

Closings related to the prevention of the COVID-19 can be found on our Closings page.

Community Events