Oregon Smoke Information

Map Notes:


The map above is not able to show all state air quality monitors. To see the whole set, go to the left column, under Hot Links
and click on DEQ Air Quality map which will bring up a map with many additional state monitors. Round icons represent permanent state air quality monitors, triangular icons represent temporary smoke monitors (when deployed).


Tuesday, June 10, 2014

WILDFIRE SMOKE FORECAST
OREGON DEPARTMENT OF FORESTRY WEATHER OFFICE
330 PM PDT MON JUN 9, 2014
SIGNIFICANT FIRE INFORMATION:
Two Bulls Fire – 10 miles NW of Bend, OR.
For updated “Significant Fire” details, visit ODF’s fire blog at http://wildfireoregondeptofforestry.blogspot.com/ or the Northwest Interagency Coordination Center (NWCC) at http://www.nwccweb.us/index.aspx.
A “Significant Fire Potential” map, for ODF protected lands, is available at (http://nfdrs.smkmgt.com/ODF_Significant_Fire_Potential.png).
AIR QUALITY:
DEQ nephelometer readings returned to near “baseline” levels this afternoon across central Oregon (i.e. Sisters, Bend, Crater Lake) but remain slightly elevated from south-central Oregon across SE Oregon (i.e. Klamath Falls to Burns). Although satellite imagery shows considerably less smoke being produced by the “Two Bulls Fire’ compared to 24 hours ago, there is still some residual smoke along, south, and east of a (Southern Cascades)-(Bend)-(John Day)-(Baker City) line.
Statewide air quality index readings are available at http://www.deq.state.or.us/aqi/index.aspx
SMOKE DISPERSION FORECAST:
Wildfire smoke dispersion depends on the stability of the atmosphere as well as wind direction and speed. A stable atmosphere holds smoke to the ground and an unstable atmosphere allows smoke to rise and dissipate. Smoke is typically mixed to higher altitudes during the afternoon, when daytime heating destabilizes the air mass. Conversely, smoke tends to settle near the ground and in drainages during the overnight and early morning hours.
TODAY:
A stable NW flow aloft is continuing to bring dry weather to the state, with the exception of some morning drizzle along the extreme north coast. An upper-level disturbance cut across Washington today; increasing the onshore flow across Oregon. Transport winds are generally NW-N at 10-20 mph across central Oregon this afternoon; backing to W-NW across eastern Oregon. So long as the increasing winds do not activate the “Two Bulls Fire,” air quality should continue to improve for areas south and east of the fire. If the fire behavior suddenly increases, then areas east-south of the fire will be in the potential path for additional wildfire smoke. Some settling of smoke near the ground is likely tonight, as the air mass stabilizes and winds slacken.
Tuesday:
A dry and stable NW flow aloft should to continue to produce locally brisk afternoon NW transport winds with local drainage flows becoming more dominant Tuesday night. This will lead possible wildfire smoke impacts east-south of the “Two Pulls Fire,” if it is still active.
Wednesday:
The flow aloft weakens as a flat and transitory upper-level ridge moves over Oregon. That will act to decrease the onshore flow and slacken winds across central and eastern Oregon. If the “Two Pulls Fire” is still active, smoke impacts will be possible NE-SE of the fire.
EXTENDED OUTLOOK:
A stronger weather system is forecast to come onshore Thursday and Friday, bringing cooler temperatures, increasing W-NW winds, and a threat of showers to mainly the northern half of Oregon.
Current Weather Forecasts from the Portland, Medford, Pendleton, and Boise National Weather Service offices are available at: http://www.wrh.noaa.gov/pqr/, http://www.wrh.noaa.gov/mfr/, http://www.wrh.noaa.gov/pdt/, and http://www.wrh.noaa.gov/boi/ respectively.
Current Western Region Fire Weather Forecasts are available via: http://www.wrh.noaa.gov/firewx/main.php.
This bulletin is also available at:
ODF Smoke Management Meteorologist

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