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: Monday, October 11, 2010       2:35 PM      Jim Little



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


    TUESDAY
A broad ridge in the upper atmosphere covers the region on Tuesday.  This ridge extends from a high centered just off the northern California coast.  Subsidence aloft will cap mixing heights at around 3000 feet and transport winds will be very light.  The light winds mean burns should be planned for locations well away from SSRA's.
    EXTENDED OUTLOOK (WEDNESDAY - FRIDAY)
The upper ridge drifts east and by Wednesday its axis will lie on a line from Nevada to Alberta.  Continued subsidence will keep mixing heights low and smoke dispersal conditions will be marginal.  By Thursday the upper ridge moves east and an upper trough in the Gulf of Alaska turns flow aloft to southwesterly.  Mixing heights should improve most areas and smoke dispersal conditions will improve to fair.  Friday will see dry weather, light southwesterly transport winds, and fair to good smoke dispersal conditions.


2.  DISPERSION



TUESDAY



Zone 630 and 632:

Mixing height 1500 - 2500 ft during the morning.  Afternoon mixing height rises to 2700 - 3700 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain.  Transport wind increases to SSE to SSW at 8 - 14 mph during the evening.



Surface wind light and variable and controlled by local terrain.



Zone 633 - 638:

Mixing height 1600 - 2600 ft during the morning.  Afternoon mixing height rises to 2700 - 3700 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain.  Transport wind increases to SSE to SSW at 8 - 14 mph during the evening.



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



OUTLOOK:



WEDNESDAY

In the west mixing height 1700 to 2700 ft throughout the day.  In the east mixing height below 1000 ft early rising to 1700 to 2700 ft by late morning and through the afternoon.  In the west transport wind SSE to SSW at 13 - 25 mph.  In the east transport wind SE to S at 10 - 18 mph.  Surface wind SE to SSW at 8 - 12 mph.



THURSDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2700 to 3700 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.



FRIDAY

Mixing height below 1000 ft early rising to 1300 to 2300 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  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 Tuesday, October 12, 2010.

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



Zone 630 and 632:

Avoid ignitions within 15 miles to the SE through SW of SSRAs.  Complete ignitions by 3:30pm.



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.  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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