SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Thursday, April 15, 2010       2:35 PM      Nick Yonker

****Due to the state furlough day tomorrow, April 16th, the office will not be staffed.  We plan to staff the office on Saturday and Sunday, April 17th and 18th and on the weekends from now on through the spring burning season.****

1.  DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638

Upper level low is in the eastern Pacific with a high pressure ridge to the east of the state.  The low will continue to bring disturbances toward the region Friday with a chance of afternoon showers or thundershowers.  Air mass will remain mostly unstable under seasonally warm, southerly flow aloft.  Expect mostly good smoke dispersion.

    OUTLOOK (SATURDAY - MONDAY):

Weather pattern changes little on Saturday from Friday's pattern.  A few showers are possible over the mountains but unlikely anywhere else.  Upper level low moves closer to the state Sunday with an increasing chance of moisture Monday.  Air mass remains fairly unstable Saturday, stabilizes Sunday, and then destabilizes Monday.

2.  DISPERSION

FRIDAY
Mixing height below 1000 ft early rising to 3500 - 4500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1800 - 2800 ft during the evening.

Transport wind SE to S at 7 - 11 mph during the morning.  Transport wind shifts to SW to WNW at 6 - 10 mph during the afternoon then increases to W to NW at 9 - 17 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to SW to W at 6 - 8 mph during the afternoon and evening.

OUTLOOK:

SATURDAY
Mixing height below 1000 ft early rising to 3300 to 4300 ft by late morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 7 - 11 mph.  Surface wind S to SW at 4 - 8 mph.

SUNDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SE to S at 4 - 8 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

MONDAY
Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind SSE to SSW at 10 - 20 mph during the morning becoming SSW to SW at 15 - 30 mph during the afternoon.  Surface wind SSE to SSW at 6 - 10 mph.

3.  BURNING INSTRUCTIONS FOR NORTHEAST OREGON ZONES 630-638
    The following considerations should be adhered to in addition to
    the requirements of the Oregon Smoke Management Plan. These
    Instructions are valid for burning conducted on Friday, April 16, 2010.
    ==================================================================

        For Friday:

Avoid ignitions within 12 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  Watch for shifting transport winds.

        For Saturday:

Avoid ignitions within 12 miles to the SSE through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSE through WSW of SSRAs.

    =========================================================
4.  SPECIAL NOTE:

    The smoke management forecaster is available at (503)-
    945-7401. Please call this number and not individual's
    numbers to discuss daily burning.  For large burns (over
    2000 tons) or burns extending over a considerable period,
    please request a special forecast.  Avoid calling before
    8 a.m. and between 2 to 3 p.m.

    This forecast is available on the Internet at:
      http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management

    Please ensure your units have been planned and accomplished by checking:
      http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml


Nick Yonker
Meteorology Manager
Oregon Department of Forestry
503-945-7451


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