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: Friday, May 1, 2009       2:35 PM      Nick Yonker

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

Upper level ridge is passing by to the east this afternoon as increasing clouds from a frontal system and trough moving up from the southwest pushes in this evening.  Increasing rain arrives overnight and early Saturday morning.  Air mass will be somewhat stable during the night and early morning but cooler air moving in aloft, plus increasing southerly flow, will make for good mixing and dispersion on Saturday.

    OUTLOOK (SUNDAY - TUESDAY):

Upper trough continues to move in Sunday with more moisture increasing during the morning hours on Sunday.  Rain will continue on and off into Sunday before drying out during the evening.  Another front will move in later Monday bringing more rain and wind.  Expect continued cool, breezy, and showery conditions into Tuesday.  Air mass will be mostly unstable through the period, and with brisk SW'erly flow, smoke dispersion will remain mostly excellent.

2.  DISPERSION

SATURDAY
Mixing height below 3000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 2800 - 3800 ft during the evening.

Transport wind WSW to WNW at 9 - 15 mph.

Surface wind SW to W at 4 - 8 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

SUNDAY
Mixing height 3300 to 4300 ft during the morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 13 - 25 mph during the morning becoming WSW to W at 20 - 35 mph during the afternoon.  Surface wind SSE to SSW at 6 - 12 mph during the morning becoming W to NW at 12 - 24 mph during the afternoon.

MONDAY
Mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSE to SSW at 10 - 20 mph during the morning becoming SSE to SSW at 15 - 30 mph during the afternoon.  Surface wind SSE to SSW at 8 - 12 mph.

TUESDAY
Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SW to W at 22 - 38 mph.  Surface wind SW to W at 15 - 25 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 Saturday, May 2, 2009.
    ==================================================================

Avoid ignitions within 10 miles to the SSW through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the SSE through WNW in or near drainages leading to SSRAs.  No additional restrictions necessary.

    =========================================================
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


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