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

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Thursday, October 28, 2010       7:30 AM Update     Pete Parsons



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



TODAY (THURSDAY)



The transitory upper-level ridge that was over the region on Wednesday is forecast to rapidly shift eastward to over the northern Rockies.  An approaching upper-level trough is digging southward offshore and is forecast to be centered about 300 miles west of the northern California coast by this afternoon.  A moist south-southwesterly flow aloft will spread rain across the region during the day.  Rainfall totals will likely range from one-quarter to three-quarters of an inch, with the greatest totals in the south and west.  Warming aloft will suppress mixing heights more than previously forecast, so this update was issued.  Please note the more restrictive burning instructions, as compared with the previous forecast.  The snow level will rise to 5500 feet north and 6500 feet south.  Transport winds will be mostly southeasterly with marginal smoke dispersal conditions.



2.  DISPERSION



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



MORNING

Mixing height 1500 - 2500 ft.

Transport wind ESE to SSE at 6 - 10 mph.

Surface wind E to SE at 4 - 8 mph.



AFTERNOON

Mixing height 1900 - 2900 ft.

Transport wind ESE to S at 6 - 12 mph.

Surface wind similar to morning.



EVENING

Mixing height 1000 - 1500 ft.

Transport wind E to SE at 4 - 8 mph.

Surface wind becomes light and variable but favors E to SE and controlled by local terrain.



Zone 615-620 (South Coast Range):



MORNING

Mixing height 1700 - 2700 ft.

Transport wind ESE to SSE at 6 - 12 mph.

Surface wind ESE to SSE at 4 - 8 mph.



AFTERNOON

Mixing height 2100 - 3100 ft.

Transport wind similar to morning.

Surface wind similar to morning.



EVENING

Mixing height 1000 - 2000 ft.

Transport wind similar to afternoon.

Surface wind becomes light and variable but favors SE and controlled by local terrain.



Zone 616-623 (South Cascades):



MORNING

Mixing height 2000 - 3000 ft.

Transport wind SE to S at 12 - 22 mph.

Surface wind SE to S at 10 - 18 mph.



AFTERNOON

Mixing height 2300 - 3300 ft.

Transport wind decreases to ESE to SSE at 8 - 12 mph.

Surface wind decreases to ESE to SSE at 6 - 10 mph.



EVENING

Mixing height 1300 - 2300 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.



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

These instructions are valid for burning conducted on Thursday, October 28, 2010.

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



Coast Range



All Zones

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





Cascades



Zone 605 and 606

No burning allowed.  A few small units are possible away from the SSRA.  Call the forecaster.



Zone 607, 608, and 611

Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.



Zone 609, 610, 620, and 623

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



Zone 616 and 617

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.



Zone 622

Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.





Siskiyous

Units should be 750 tons or less, spaced 15 miles apart, and 15 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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