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: Wednesday, May 12, 2010       2:35 PM      Pete Parsons



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


    THURSDAY
A flat upper-level ridge will result in a weak westerly flow.  Skies should be mostly sunny.  After morning inversions, mixing should be fair to good from the late morning through the afternoon, although transport winds will be light and somewhat variable.

    OUTLOOK (FRIDAY-SUNDAY)
A weak upper-level disturbance, in the northwesterly flow aloft, will shift the surface thermal trough into northeastern Oregon Friday afternoon through Saturday.  That will bring some clouds to the region but not much in the way of shower activity.  Temperatures will warm slightly.  Early morning inversions will give way to good afternoon mixing but with only light transport winds at times. The flow aloft is forecast to turn southwesterly and increase on Sunday with a chance of showers.  Mixing should be good but transport winds may be variable.


2.  DISPERSION



THURSDAY



Zone 630 and 632:

Mixing height below 1000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 1000 - 2000 ft during the evening.



Transport wind E to SE at 4 - 8 mph during the morning.  Transport wind shifts to SE to SSW at 4 - 8 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.



Surface wind light and variable and controlled by local terrain.



Zone 633 - 638:

Mixing height below 1000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 1000 - 2000 ft during the evening.



Transport wind light and variable and controlled by local terrain.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



FRIDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind SE to S at 10 - 20 mph during the morning becoming SSE to SSW at 6 - 12 mph during the afternoon.  Surface wind SE to S at 7 - 13 mph.



SATURDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.



SUNDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable during the morning becoming SSW to WSW at 6 - 10 mph during the afternoon.  Surface wind light and variable.



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 Thursday, May 13, 2010.

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



Zone 630 and 632:

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.



Zone 633 - 638:

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.



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

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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