News & Events

Air Quality (PM2.5) Forecast for Oct 20

Tuesday, October 21, 2008

Regional Maximum PM 2.5 Concentrations:
Monday October 20, 2008:
PM 2.5 – GREEN (44 AQI or 13.4 µg/m3)

Wednesday, October 22, 2008:
Fine Particulates (PM 2.5) – Code GREEN

Short-Term Discussion: Clouds held off a bit more than expected overnight allowing temperatures to once again dip below the freezing mark. The cold front looks like it has cleared the area and is currently working its way through New Jersey. Northwesterly winds will pick up this afternoon though we should also get some peaks of sunshine. Fine-particulate concentrations should begin to drop over the next couple of hours falling back into the green range where they should stay for the next day or so.

Some clearing overnight with light northerly winds and temperatures falling into the mid 30s in some of the outlying areas. Becoming partly sunny and breezy on Thursday with afternoon temperatures only expected to climb into the low 50s in most spots. Brisk northerly winds and low humidity levels should keep Wednesday’s fine-particulate concentrations in the code GREEN (good) range.

Extended: High pressure should keep us dry through the first part of the weekend. A storm system will develop over the lower Mississippi Valley then head into the Northeast on Saturday. Much cooler air will filter in from central Canada behind this system ensuring a cool start for next week. Air-quality readings should stay in the good range through Thursday then slowly climb as humidity levels increase ahead of this next storm system.