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, June 4, 2010       2:35 PM      Pete Parsons



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



    SATURDAY


The region will get a break from the moderate to heavy rains of the past couple of days, as a transitory upper-level ridge pushes an unseasonably strong westerly jet stream slightly north.  High pressure will also build at the surface, resulting in light transport winds.  Partly sunny skies will help temperatures recover to near normal. High afternoon mixing heights will provide good daytime smoke dispersal conditions.

    OUTLOOK (SUNDAY-TUESDAY)

The strong westerly jet stream will direct another, weaker, weather system across Washington and Oregon on Sunday.  Light rain will likely spread across most of the region with local moderate rainfall possible, especially over higher terrain.  However, rainfall amounts should not be as great as they were with the past two storms. Clouds and rain will cool surface temperatures back below normal.  Some drying is expected on Monday with skies becoming partly to mostly sunny.  Temperatures should warm to near normal.  The next system is forecast to bring back a chance of rain by late Tuesday with showery and cooler weather likely Tuesday night and Wednesday.  High afternoon mixing heights will provide fair to good daytime smoke dispersal conditions during the outlook period.


2.  DISPERSION



SATURDAY



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 S to SW at 4 - 8 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon and 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.  Transport wind increases to ESE to S at 4 - 8 mph during the evening.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 2800 to 3800 ft during the afternoon.  Transport wind SSE to SSW at 8 - 14 mph during the morning becoming WSW to W at 13 - 25 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to W at 8 - 12 mph during the afternoon.



MONDAY

Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.



TUESDAY

Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning and through the afternoon.  Transport wind SSW to SW at 8 - 12 mph.  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 Saturday, June 5, 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.  Complete ignitions by 5 p.m.



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.  Complete ignitions by 5 p.m.



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

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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