SMI Northeast (Smoke Management Instructions) (no subject)

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Sunday, October 10, 2010       2:35 PM      Jim Little



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


    MONDAY
The remains of Sunday's active front are well to the east on Monday.  Upper level flow is nearly due west to east but there is a hint of an upper level ridge building offshore.  Because of the recent rains, low levels of the atmosphere will initially remain moist and fog is likely in many valley locations.  Transport winds will be generally northwesterly and mixing heights should allow for fair smoke dispersal conditions.
    EXTENDED OUTLOOK (TUESDAY - THURSDAY)
The ridge aloft continues to develop Tuesday.  Initially it will be offshore but it will drift eastward to over the Pacific Northwest by afternoon.  Warm air aloft and sinking air with the upper ridge will suppress mixing heights and transport winds will be light and variable, hampering ventilation conditions.  By Wednesday the upper ridge axis will extend from central Nevada, through central Oregon and northward to Alberta.  It will continue its eastward drift.  Maximum mixing heights will be further suppressed and ventilation conditions will only be marginal.  On Thursday the upper ridge continues its push east.  Flow aloft becomes southwesterly and temperatures aloft begin to cool.  This will help maximum mixing heights recover to a more favorable level.  Transport winds will be generally southerly or south-southwesterly.

2.  DISPERSION



MONDAY



Zone 630 and 632:

Mixing height 1300 - 2300 ft during the morning.  Afternoon mixing height rises to 3400 - 4400 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 NW to N at 6 - 12 mph during the afternoon then shifts to N to NE at 5 - 9 mph during the evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NNW to NNE at 6 - 12 mph during the afternoon then becomes light and variable during the evening.



Zone 633 - 638:

Mixing height 2200 - 3200 ft during the morning.  Afternoon mixing height rises to 3200 - 4200 ft then lowers below 1000 ft during the evening.



Transport wind WNW to NNW at 5 - 9 mph during the morning and afternoon.  Transport wind becomes light and variable and controlled by local terrain during the evening.



Surface wind WNW to NNW at 5 - 9 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.



OUTLOOK:



TUESDAY

Mixing height below 1000 ft early rising to 1400 to 2400 ft by late morning rising to 2900 to 3900 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



WEDNESDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2300 to 3300 ft during the afternoon.  Transport wind light and variable during the morning becoming ESE to SSE at 4 - 8 mph during the afternoon.  Surface wind light and variable.



THURSDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable during the morning becoming S to SW at 4 - 8 mph during the afternoon.  Surface wind light and variable during the morning becoming S to SW at 4 - 8 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 Monday, October 11, 2010.

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



Zone 630 and 632:

Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles to the NW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:30pm.



Zone 633 - 638:

Avoid ignitions within 15 miles to the WNW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:30pm.



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

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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