Jefferson County Smoke Management Program

The Jefferson County Smoke Management Program is a cooperative effort of Jefferson County Seed Growers and the Jefferson County Rural Fire Protection District, committed to a safe, controlled agricultural field burning season that insures public safety and minimizes, to the greatest degree possible, impacts of smoke on the communities of Central Oregon.

Forecast Information

JEFFERSON COUNTY FIELD BURNING FORECAST
OREGON DEPARTMENT OF FORESTRY WEATHER OFFICE
10:00 AM PDT THU JUL 29 2010
 
WEATHER DISCUSSION:
 
Once again today upper air charts show a weak trough off the coast of North
America and an upper level high centered over the four-corners area of the
southwest United States. This is giving a southwesterly flow aloft over western
Oregon. At lower levels, however, northerly winds are the rule.
 
The morning aircraft sounding shows a weak inversion to about 3600 feet AGL.
This will be broken with a surface temperature of about 84 degrees. (Likely
early this afternoon.)Thunderstorms will be less wide-spread today, but cannot
be ruled out for the area.
 
With the northerly transport winds today is
likely not a good day for significant open-field burning in the area.
TODAY:
 
11am 2pm 5pm 8pm
Temperature: 79 88 89 79
Relative Humidity: 34% 21% 19% 31%
Surface Wind Direction: 010 340 340 330
Surface Wind Speed: 4 7 10 9
Transport Wind Direction: 010 360 350 340
Transport Wind Speed: 5 5 9 5
Estimated Mixing Height: 3400 5500 5600 500
Ventilation Index: 17 28 50 2
 
Sunset: 8:29 pm
 
EXTENDED OUTLOOK:
The upper level trough off the coast will kick out several minor disturbances
before finally moving eastward over the weekend. This will leave the region
under a dry, northerly flow aloft.