| Lehigh
Valley Ozone/PM2.5 Forecast
| 
May 25, 2013
|
|
Date: Saturday, May 25, 2013
Action Day?:
No
Temperature: Mid to Upper 60s
Discussion:
*** Saturday’s Forecast: Expect increasing sunshine by early Saturday with a breezy north/northwesterly flow continuing as high pressure builds from the north. The flow from the north will continue to pull a clean, cool, and dry air mass into the region. Both Ozone and PM 2.5 levels will remain inside the good range. Temperatures will fare a bit better than that of Friday as highs will climb back into the mid to upper 60s. Winds will still be gusty at times, but not as strong as that of Friday.
|
Extended Forecast
| Date |
5/25/2013 |
5/26/2013 |
5/27/2013 |
5/28/2013 |
| Ozone |
GREEN
|
GREEN
|
GREEN
|
GREEN
|
| PM |
GREEN
|
GREEN
|
GREEN
|
GREEN
|
Extended:
*** Sunday’s Forecast: Similar conditions will continue again on Sunday with high pressure providing another day of ample sunshine. Winds again will calm a little from the previous day, but will still be breezy enough out of the north for another day of good air quality. Even with ample sunshine, a lack of primary pollutants for Ozone to build off of will limit concentrations to within the good range. Low moisture and plenty of mixing with the breezy flow will again keep PM 2.5 levels well within the good range as well. Forecast highs will be near 70 degrees, which is still a few degrees below normal for this late in May. *** Monday’s Forecast: High pressure will begin to develop more to our south and east, which will gradually turn the flow to more southerly once again. The northwesterly flow will continue for the first half of the day before beginning to shift to more southwesterly. After low concentrations the whole weekend, the shift to southwesterly flow will not allow enough time to see either Ozone or PM 2.5 levels climb out of the good range. Concentrations may end up higher than that of Saturday or Sunday, but will remain good. Forecast highs will climb into the low 70s, but remain just below normal. *** Tuesday’s Forecast: Uncertainty begins to build starting with Tuesday. A warm front will approach the region, but latest computer model runs have shown a variance in timing on when it pushes to our north. Tuesday will see an increase in clouds and greatest chance for showers/thunderstorms so far in forecast. Temperatures will return to normal with highs in the mid to upper 70s. The moisture will begin to return as dew point temperatures will climb back into the 50s and could approach the low 60s. Ozone and especially PM 2.5 may reach the higher end of the good range, but might not reach moderate status until Wednesday. *** Extended Forecast: Warm and moist air will return for the middle and through the rest of next week with winds becoming light and out of the south. Temperatures will return to the mid to upper 80s with a set up that is favorable for at least moderate levels of Ozone and PM 2.5. This will be worth watching as it begins to develop by early next week. --- Roble
|
|
 |
Go to the new
Lehigh Valley - Berks
Air Quality Partnership
web site!
Lehigh Valley
 List
of Partners
Become
a Partner
Partner's
Resource
Meetings
Forecast Info
Forecast
via E-mail
Action Days
Tally
of Forecasts
Forecast
Calendar Monitoring
Current
AQI
Pollution
Levels Forecast Key
|
Back
to Home
