SMI West (Smoke Management Instructions) Western Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Thursday, September 23, 2010       2:30 PM      Pete Parsons



1.  DISCUSSION AND FORECAST FOR THE WESTERN OREGON AREA FORECAST ZONES 601-623



    FRIDAY



A building ridge of high pressure will begin clearing skies over western Oregon with temperatures returning to normal.  However, light transport winds will make for only marginal ventilation conditions.


     OUTLOOK (SATURDAY-MONDAY)

A very weak weather system is forecast to bring some clouds late Saturday and Sunday.  Although most of the precipitation should stay north of Oregon, some light rain is likely along the northern and central coast and over the north coastal range.  Light rain could penetrate inland as far as the northern Cascades, but southern zones appear as if they will stay dry.  The weak frontal system will cause some increase in transport winds, which will bring some improvement to the ventilation conditions.  The upper-level ridge is forecast to rebound Monday with dry weather and slackening transport winds.



2.  DISPERSION



Zone 601-612 (North Coast Range and Cascades):



MORNING

Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.

Transport wind light and variable but favors S to SW and controlled by local terrain.

Surface wind light and variable but favors S to W and controlled by local terrain.



AFTERNOON

Mixing height rising to 3600 - 4600 ft.

Transport wind similar to morning.

Surface wind similar to morning.



EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.



Zone 615-620 (South Coast Range):



MORNING

Mixing height below 1000 ft early rising to 1500 - 2500 ft by late morning.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.



AFTERNOON

Mixing height rising to 2900 - 3900 ft.

Transport wind similar to morning.

Surface wind similar to morning.



EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.



Zone 616-623 (South Cascades):



MORNING

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.



AFTERNOON

Mixing height 2900 - 3900 ft.

Transport wind similar to morning.

Surface wind similar to morning.



EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.



OUTLOOK:



SATURDAY

Mixing height below 1000 ft early rising to 1900 to 2900 ft by late morning rising to 3000 to 4000 ft during 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.



SUNDAY

Mixing height below 1000 ft early rising to 1800 to 2800 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind SSW to WSW at 6 - 10 mph.  Surface wind SSE to SSW at 4 - 8 mph during the morning becoming light and variable during the afternoon.



MONDAY

Mixing height below 1000 ft early rising to 1600 to 2600 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA

These instructions are valid for burning conducted on Friday, September 24, 2010.

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



Coast Range



Zone 601 and 612

Units should be 750 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.



Zone 602 and 603

No burning allowed.



Zone 615 and 616 west of R8W

Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.



Zone 616 east of R9W

Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.



Zone 618 and 619

Use standard guidance matrix. (See section 5 below.)



Zone 620

Units should be 500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.





Cascades



Zone 605 and 606

Units should be 500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.



Zone 607, 608, 609, 617, and 623

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.



Zone 610 and 611

Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.



Zone 616

Units should be 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.



Zone 620 and 622

No burning allowed.





Siskiyous

Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.



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

4.  SPECIAL NOTE:



    Call the smoke management duty forecaster at (503) 945-7401 to

    discuss burning.  Please do not call individual's numbers to

    discuss daily burning.  If the forecaster is not available,

    leave a message and he will return your call as soon as possible.

    Avoid calling between 2 to 2:30 p.m.



    The 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





5.  STANDARD GUIDANCE MATRIX:



  * Greater than 5000 ft mixing height:  No burning within 5 miles of

    downwind SSRA.  Maximum 100 tons per mile from downwind SSRA.

    Example:  500 ton maximum allowed if burned 5 miles from downwind SSRA.



  * 3000 - 5000 ft mixing height:  No burning within 10 miles of

    downwind SSRA.  Maximum 75 tons per mile from downwind SSRA.

    Example:  750 ton maximum allowed if burned 10 miles from downwind SSRA.



  * Less than 3000 ft mixing height:  No burning within 15 miles of

    downwind SSRA.  Maximum 50 tons per mile from downwind SSRA.

    Example:  750 ton maximum allowed if burned 15 miles from downwind SSRA.



  * All exceptions must be coordinated with the duty forecaster

    prior to ignition.

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