Dense Fog Advisory
Ends in 51 min
When
Until 11 AM EDT this morning.
Where
Portions of northern Indiana, southwest Michigan, and northwest Ohio.
Issued for this forecast zone · National Weather Service Northern Indiana
What, impacts and precautionsHide details
What
Visibility one quarter mile or less in dense fog.
Impacts
Low visibility could make driving conditions hazardous.
Precautionary actions
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Areas: Elkhart; Lagrange; Steuben; Noble; De Kalb; Marshall; Whitley; Allen; Wabash; Huntington; Wells; Adams; Blackford; Jay; Eastern St. Joseph; Northern Kosciusko; Western St. Joseph; Southern Kosciusko; Cass; St. Joseph; Branch; Hillsdale; Williams; Defiance; Paulding; Van Wert
See it on weather.gov (opens in a new tab)

Observed 9:45 AM EDT at KFWA

Decatur, IN weather

Foggy and 46°8°, 9°5° warmer than a typical Oct 24.

Forecasts differ

Now 46°8°

Fog

Wind: Calm; Light through 10 PM
Visibility (notable): 0.1 mi0.2 km; Dense fog
Dew point: 46°8°; Comfortable
Humidity: 100%; Air 46°8°, dew point 46°8° · fog or dew likely
UV index: 1Low; Moderate 12–5 PM · peak 4
Air quality: 65Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.47 inHg1032 hPa; Rising slowly · +0.03 inHg+1.0 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

3°2° warmer than this time yesterday (43°6° then, 46°8° now)

Good hours for

Fog until noon
Above 60°16° today by 1 PM
High 69°21° today at 5 PM
Below 60°16° tonight after 8 PM
Low 43°6° tomorrow at 8 AM

This morningUp to 53°12° by 11 AM · Cloudy
This afternoonUp to 69°21° by 5 PM · Partly cloudy
TonightDown to 45°7° by 5 AM · Partly cloudy
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 72°22° by 4 PM · Mostly cloudy
Tomorrow nightDown to 47°8° by 5 AM · Mostly cloudy
Monday morningUp to 50°10° by 9 AM · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 10a	Fog	49°9° (likely 46°8° to 49°9°)	49°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	95%	1
Sat 11a	Fog	53°12° (likely 49°9° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	80%	92%	2
Sat 12p	Partly sunny	57°14° (likely 50°10° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 4 mph7 km/h	72%	74%	3
Sat 1p	Partly sunny	63°17° (likely 53°12° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 5 mph7 km/h	60%	51%	4
Sat 2p	Partly sunny	66°19° (likely 55°13° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 5 mph7 km/h	54%	47%	4
Sat 3p	Partly sunny	67°19° (likely 57°14° to 67°19°)	67°19°	0%	0 mph0 km/h, gusts 5 mph8 km/h	50%	56%	3
Sat 4p	Partly sunny	68°20° (likely 59°15° to 68°20°)	68°20°	0%	0 mph0 km/h, gusts 5 mph8 km/h	49%	50%	3
Sat 5p	Partly sunny	69°21° (likely 60°16° to 69°21°)	69°21°	0%	0 mph0 km/h, gusts 5 mph8 km/h	45%	47%	2
Sat 6p	Partly sunny	67°19° (likely 58°14° to 67°19°)	67°19°	0%	0 mph0 km/h, gusts 6 mph10 km/h	50%	45%	1
Sat 7p	Partly cloudy	63°17° (likely 54°12° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 6 mph10 km/h	58%	48%	0
Sat 8p	Partly cloudy	59°15° (likely 51°11° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 7 mph12 km/h	69%	49%	0
Sat 9p	Mostly clear	54°12° (likely 50°10° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 8 mph14 km/h	80%	46%	0
Sat 10p	Clear	52°11° (likely 49°9° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 9 mph14 km/h	86%	44%	0
Sat 11p	Clear	51°11° (likely 48°9° to 51°11°)	51°11°	0%	0 mph0 km/h, gusts 8 mph13 km/h	86%	42%	0
Sun 12a	Clear	50°10° (likely 48°9° to 50°10°)	50°10°	0%	0 mph0 km/h, gusts 8 mph14 km/h	86%	30%	0
Sun 1a	Clear	49°9° (likely 47°8° to 49°9°)	49°9°	0%	0 mph0 km/h, gusts 7 mph12 km/h	89%	27%	0
Sun 2a	Clear	48°9° (likely 45°7° to 48°9°)	48°9°	0%	0 mph0 km/h, gusts 7 mph11 km/h	89%	5%	0
Sun 3a	Clear	47°8° (likely 44°7° to 47°8°)	47°8°	0%	0 mph0 km/h, gusts 7 mph11 km/h	89%	5%	0
Sun 4a	Clear	46°8° (likely 43°6° to 46°8°)	46°8°	0%	0 mph0 km/h, gusts 7 mph11 km/h	93%	10%	0
Sun 5a	Clear	45°7° (likely 43°6° to 46°8°)	45°7°	0%	0 mph0 km/h, gusts 7 mph11 km/h	93%	10%	0
Sun 6a	Clear	44°7° (likely 42°6° to 44°7°)	44°7°	0%	0 mph0 km/h, gusts 8 mph13 km/h	96%	9%	0
Sun 7a	Clear	44°7° (likely 42°6° to 44°7°)	44°7°	0%	0 mph0 km/h, gusts 7 mph11 km/h	96%	1%	0
Sun 8a	Sunny	43°6° (likely 41°5° to 43°6°)	43°6°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	4%	0
Sun 9a	Mostly sunny	45°7° (likely 43°6° to 46°8°)	45°7°	0%	0 mph0 km/h, gusts 8 mph13 km/h	100%	15%	0
Sun 10a	Mostly sunny	52°11° (likely 49°9° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 7 mph12 km/h	89%	46%	1
Sun 11a	Mostly sunny	57°14° (likely 54°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 8 mph13 km/h	77%	61%	2
Sun 12p	Mostly sunny	62°17° (likely 59°15° to 63°17°)	62°17°	0%	0 mph0 km/h, gusts 7 mph12 km/h	67%	69%	3
Sun 1p	Partly sunny	67°19° (likely 63°17° to 67°19°)	67°19°	0%	5 mph8 km/h from S, gusts 6 mph9 km/h	54%	63%	4
Sun 2p	Partly sunny	70°21° (likely 65°18° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 7 mph11 km/h	49%	71%	4
Sun 3p	Cloudy	70°21° (likely 66°19° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 7 mph12 km/h	47%	80%	4
Sun 4p	Cloudy	72°22° (likely 67°19° to 72°22°)	72°22°	0%	0 mph0 km/h, gusts 8 mph13 km/h	43%	65%	3
Sun 5p	Cloudy	70°21° (likely 66°19° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 7 mph12 km/h	46%	70%	2
Sun 6p	Partly sunny	69°21° (likely 63°17° to 69°21°)	69°21°	0%	0 mph0 km/h, gusts 5 mph9 km/h	51%	67%	1
Sun 7p	Partly cloudy	66°19° (likely 58°14° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph10 km/h	54%	67%	0
Sun 8p	Cloudy	59°15° (likely 56°13° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 7 mph12 km/h	67%	68%	0
Sun 9p	Partly cloudy	56°13° (likely 55°13° to 58°14°)	56°13°	0%	0 mph0 km/h, gusts 7 mph12 km/h	72%	54%	0
Sun 10p	Partly cloudy	54°12° (likely 53°12° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 8 mph13 km/h	74%	24%	0
Sun 11p	Clear	53°12° (likely 51°11° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 7 mph11 km/h	77%	29%	0
Mon 12a	Partly cloudy	52°11° (likely 50°10° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 6 mph9 km/h	80%	56%	0
Mon 1a	Partly cloudy	51°11° (likely 48°9° to 51°11°)	51°11°	0%	0 mph0 km/h, gusts 6 mph9 km/h	80%	60%	0
Mon 2a	Partly cloudy	50°10° (likely 47°8° to 51°11°)	50°10°	0%	0 mph0 km/h, gusts 7 mph12 km/h	83%	74%	0
Mon 3a	Cloudy	49°9° (likely 45°7° to 50°10°)	49°9°	0%	0 mph0 km/h, gusts 7 mph11 km/h	86%	79%	0
Mon 4a	Cloudy	48°9° (likely 45°7° to 50°10°)	48°9°	0%	0 mph0 km/h, gusts 7 mph11 km/h	86%	77%	0
Mon 5a	Cloudy	47°8° (likely 44°7° to 49°9°)	47°8°	0%	0 mph0 km/h, gusts 6 mph10 km/h	89%	67%	0
Mon 6a	Partly cloudy	46°8° (likely 44°7° to 48°9°)	46°8°	0%	0 mph0 km/h, gusts 7 mph11 km/h	93%	63%	0
Mon 7a	Partly cloudy	45°7° (likely 43°6° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 6 mph9 km/h	93%	60%	0
Mon 8a	Partly sunny	46°8° (likely 43°6° to 49°9°)	46°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	93%	46%	0
Mon 9a	Partly sunny	50°10° (likely 44°7° to 54°12°)	50°10°	0%	0 mph0 km/h, gusts 5 mph7 km/h	86%	35%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Fog. High 69°21°, low 43°6°. Typical 60°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Fog, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  Dry
Official NWS forecast
Today: Areas of fog before noon. Mostly sunny, with a high near 69. Southeast wind around 0 mph.
Tonight: Mostly clear, with a low around 43. Southeast wind around 0 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–69°21°
Low, likely
42°6°–45°7°
Typical high / low
60°16° / 40°4°
Wind
8 mph12 km/h, gusts 14 mph22 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 72°22°, low 45°7°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 72. Southeast wind 0 to 5 mph.
Night: Partly cloudy, with a low around 45. South wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–72°22°
Low, likely
41°5°–45°7°
Typical high / low
60°16° / 40°4°
Wind
8 mph12 km/h
UV peak
4
Monday, Oct 26. Cloudy. High 72°22°, low 47°8°. Typical 59°15° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Partly sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 71°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 72. West wind around 0 mph.
Night: Mostly cloudy, with a low around 47.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
70°21°–72°22°
Low, likely
43°6°–47°8°
Typical high / low
59°15° / 40°4°
Wind
7 mph11 km/h, gusts 12 mph19 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 66°19°, low 47°8°. Typical 59°15° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 66.
Night: Mostly cloudy, with a low around 47.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
65°18°–71°22°
Low, likely
47°8°–50°10°
Typical high / low
59°15° / 39°4°
Wind
10 mph15 km/h, gusts 18 mph29 km/h
UV peak
3
Wednesday, Oct 28. Cloudy. High 72°22°, low 52°11°. Typical 58°14° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 72.
Night: Mostly clear, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–73°23°
Low, likely
47°8°–54°12°
Typical high / low
58°14° / 39°4°
Wind
10 mph15 km/h, gusts 20 mph32 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 72°22°, low 47°8°. Typical 58°14° / 38°3°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 72.
Night: Partly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 72°22°).
High, likely
72°22°–74°23°
Low, likely
47°8°–53°12°
Typical high / low
58°14° / 38°3°
Wind
12 mph19 km/h, gusts 24 mph38 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 70°21°, low 47°8°. Typical 57°14° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Partly cloudy, with a low around 47.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–75°24°
Low, likely
43°6°–53°12°
Typical high / low
57°14° / 38°3°
Wind
11 mph17 km/h, gusts 22 mph36 km/h
UV peak
2
Saturday, Oct 31. Cloudy. High 71°22°, low 51°11°. Typical 57°14° / 38°3°. Rain 0.03 in0.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°17°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 57°14°
  40% chance · 0.07 in1.7 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–77°25°
Low, likely
45°7°–56°13°
Typical high / low
57°14° / 38°3°
Wind
11 mph18 km/h, gusts 24 mph39 km/h
UV peak
3
Sunday, Nov 1. Drizzle. High 70°21°, low 57°14°. Typical 56°13° / 37°3°. Rain 0.42 in11 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  50% chance · 0.09 in2.3 mm
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  50% chance · 0.07 in1.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  50% chance · 0.16 in4 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  40% chance · 0.15 in3.9 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–72°22°
Low, likely
50°10°–61°16°
Typical high / low
56°13° / 37°3°
Wind
20 mph32 km/h, gusts 32 mph52 km/h
UV peak
2
Monday, Nov 2. Rain. High 63°17°, low 57°14°. Typical 56°13° / 37°3°. Rain 0.6 in15 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Rain, 62°17°
  40% chance · 0.17 in4.3 mm
2. Afternoon
  noon–6 PM
  Rain, 63°17°
  40% chance · 0.29 in7.3 mm
3. Evening
  6 PM–midnight
  Rain, 60°15°
  30% chance · 0.62 in16 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
58°14°–70°21°
Low, likely
53°12°–64°18°
Typical high / low
56°13° / 37°3°
Wind
21 mph34 km/h, gusts 39 mph63 km/h

10 days15 days30 days

The outlook

Today
Dry, high 69°, low 43°.
Tomorrow
Dry, high 72°, low 45°, warming up.
Monday
Dry, high 72°, low 47°.
Rest of week
Highs 63–72°; chance of precipitation on Sunday, Monday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (IWX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

St. Marys River at Decatur

1.4 mi

Below flood stage

Level: 3.1 ft
Flow: 60 cfs

Reading from Sat 8:55 AM · NWS gauge page

St. Marys River at Pleasant Mills

5.6 mi

Level: 4.0 ft

Reading from Sat 9 AM · NWS gauge page

St. Marys River at Willshire

9.1 mi

Level: 2.6 ft

Reading from Sat 9 AM · NWS gauge page

Wabash River at Linn Grove

14 mi

Below flood stage

Level: 4.8 ft
Flow: 53 cfs

Reading from Sat 8:45 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 82% less heating than a typical week.

This week 20Typical 113

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 11
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at.

Comfort

Dry air outside (dew point 46°F).

Open the windows?

Today, 1:00 PM–7:00 PM

Good stretch to open the windows.

Is this typical?

Berne Wwtp · official normals 1991–2020 · records 1910–2026

Oct 24, today vs a typical year

Today’s expected high is 9°5° warmer than typical.

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

Decatur weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 45 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 30 min less
Golden hour: 6:08–7:03 PM; Morning 7:43–8:39 AM
Blue hour: 7:03–7:14 PM; Morning 7:33–7:43 AM; first light 7:33 AM

Stars tonight? Fair

Mostly clear 2–7:34 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:14 AM · rises 5:43 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Decatur. A level horizon.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Dense Fog Advisory