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

Sat May 16 14:30:11 PDT 2009

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

ISSUED: Saturday, May 16, 2009       2:35 PM      Nick Yonker

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

Upper level ridge will remain strong over the region through tomorrow providing probably the warmest temperatures of the year.  Air mass will remain stable with a brief period of good mixing during maximum afternoon heating.  Wind flow will be rather light and variable leading to mostly poor to fair smoke dispersion.

    OUTLOOK (MONDAY - WEDNESDAY):

Upper ridge will shift to the east on Monday as an upper trough and minor front approach.  Marine push will move in during the afternoon, cooling down the very warm temperatures.  Trough and front move in Tuesday providing cooler and breezy conditions.  Air mass destabilizes and dispersion improves under the brisk onshore flow.  Trough moves to the east Wednesday with a flat ridge replacing it.  Wind flow turns northerly again.

2.  DISPERSION

SUNDAY

Zone 630 and 632:
Mixing height below 1000 ft early rising to 2200 - 3200 ft by late morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to WSW to WNW at 6 - 10 mph during the afternoon then shifts to NNW to NNE at 8 - 14 mph during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WSW to NW at 5 - 9 mph during the afternoon and evening.

Zone 633 - 638:
Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises to 3500 - 4500 ft then lowers below 1000 ft during the evening.

Transport wind SE to SSW at 4 - 8 mph during the morning.  Transport wind shifts to SW to WNW at 6 - 12 mph during the afternoon and shifts to WNW to NNW at 8 - 12 mph during the evening.

Surface wind light and variable and controlled by local terrain.  Surface wind increases to W to NNW at 4 - 8 mph during the evening.

OUTLOOK:

MONDAY
Mixing height below 1000 ft early rising to 1800 to 2800 ft by late morning rising to 3300 to 4300 ft during the afternoon.  Transport wind light and variable during the morning becoming SW to WSW at 10 - 18 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to WNW at 6 - 10 mph during the afternoon.

TUESDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind SW to W at 12 - 24 mph during the morning becoming WSW to WNW at 18 - 32 mph during the afternoon.  Surface wind SW to W at 10 - 20 mph during the morning becoming W to NW at 15 - 25 mph during the afternoon.

WEDNESDAY
Mixing height 3500 to 4500 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind NW to N at 6 - 10 mph.  Surface wind light and variable during the morning becoming NNW to NNE at 5 - 9 mph during the afternoon.

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 Sunday, May 17, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.

Zone 633 - 638:
Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Watch for shifting transport winds.  Recommend against burning units that will smolder significantly overnight.

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