Home > USA > Indiana > Allen County > Harlan
Primary air pollutant in the Harlan area:
OZONE - 21 Good
Enjoy your outdoor activities.
Weather Analysis and Air Quality Forecasting Decisions: Fine Particulate: Today will bring temperatures reaching near 30 degrees at the warmest. Skies will be mostly cloudy and dewpoints will be in the 20's. 850 mb temperatures will stay above -10 C and mixing heights will reach near 2000 ft at most. Most of the region is staying dry today, with some snow fall in the more southern counties. Wind direction will vary throughout the day, with wind speeds staying below 10 mph. There is a cold front making its way towards the region today from the northwest, which will move through the state early this weekend. As it moves through tomorrow temperatures will drop to around 20 degrees in the afternoon and there will be a chance of snow. Skies will become overcast. Dewpoints will drop to near 10 degrees and 850 mb temperatures will fall to near 15 C. Mixing heights will reach above 2000 ft and winds will be primarily from the northwest, reaching speeds near 10 mph with gusts near 20 mph. Temperatures will stay cold on Sunday, with highs near 15 degrees, and the chance of snow will persist, particularly near the lake. Dewpoints will stay near 10 degrees and 850 mb temperatures will continue to drop, reaching below -15 C. Cloud cover will decrease during this time and there will be an area of high surface pressure moving into the region behind the previously mentioned cold front. Winds will still be primarily from the northwest, reaching speeds near 10 mph with gusts near 20 mph. Mixing heights will rise to near 3000 ft. Monday will bring slightly warmer temperatures, reaching near 20 degrees at most. Dewpoints will stay above 10 degrees during this time and cloud cover will be scattered. 850 mb temperatures will rise throughout the day, reaching above -5 C, and mixing heights will stay near 2000 ft. Winds will shift to be primarily from the southwest as wind speeds increase slightly. The Canadian model shows a mix of good and moderate PM2.5 today, and then good by the start of next week. The NOAA 6Z BC model nearly agrees, with all moderate today and a decrease into the good range by Sunday. This is consistent with recent measurements, which were a mix of good and moderates this past week. The Canadian smoke model shows scattered smoke across the region today and none over the weekend, while the NOAA smoke model shows no wildfire smoke impacts for the entire period. With relatively varied winds as this week comes to a close, and given recent conditions, moderate PM2.5 buildup will be possible for a couple more days. As winds pick up over the weekend PM2.5 buildup will become less likely. Regional Forecaster Initials: EF
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Good
Primary Pollutant: PM2.5 - 0 Good