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: Friday, November 6, 2009       2:30 PM      Nick Yonker

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

Cold front quickly passed to the east early this morning leaving the region under a cool trough pattern with the jet stream overhead.  This will lead to continued showery and blustery conditions through tomorrow.  Air mass will remain unstable and smoke dispersion excellent.

    OUTLOOK (SUNDAY - TUESDAY)

Upper level trough weakens on Sunday with a minor ridge building in and shutting off most of the shower activity.  However, next front and trough will be fast on its heels and move in Monday morning.  Front gets hung up most of the day near the coast, bringing plenty of moisture there, but little over the Cascades and to the east.  The front will kick through Monday night with the upper level trough slowly moving in on Tuesday.  Expect more cool, moist and unstable conditions.  Smoke dispersion will generally be good to excellent through the period.

2.  DISPERSION

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

MORNING
Mixing height above 5000 ft.
Transport wind SW at 18 - 32 mph.
Surface wind SSW to SW at 10 - 20 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind SW at 22 - 38 mph.
Surface wind SSW to SW at 15 - 25 mph.

EVENING
Mixing height remains above 5000 ft.
Transport wind decreases to SW to W at 14 - 28 mph.
Surface wind decreases to SW to W at 9 - 15 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height above 5000 ft.
Transport wind SW to WSW at 15 - 25 mph.
Surface wind S to SW at 8 - 14 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind SW at 18 - 32 mph.
Surface wind SSW to WSW at 10 - 18 mph.

EVENING
Mixing height remains above 5000 ft.
Transport wind decreases to SW to WSW at 10 - 22 mph.
Surface wind SW to WSW at 8 - 12 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind SW to WSW at 9 - 15 mph.
Surface wind SSE to SW at 6 - 12 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind SW to WSW at 10 - 20 mph.
Surface wind shifts to SW to W at 8 - 12 mph.

EVENING
Mixing height remains above 5000 ft.
Transport wind SW to W at 8 - 12 mph.
Surface wind similar to afternoon.

OUTLOOK:

SUNDAY
In the north mixing height above 5000 ft throughout the day.  In the south mixing height 2500 to 3500 ft throughout the day.  In the north transport wind SSW to SW at 10 - 18 mph.  In the south transport wind SSE to SSW at 4 - 8 mph.  Surface wind SSE to SSW at 4 - 8 mph.

MONDAY
In the north mixing height below 1000 ft early, rising to 3000 to 4000 ft by late morning rising to 4200 to 5000 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 1800 to 2800 ft by late morning rising to 3200 to 4200 ft during the afternoon.  Transport wind SSE to SSW at 25 - 40 mph during the morning becoming SSW to SW at 20 - 35 mph during the afternoon.  Surface wind SSE to S at 12 - 24 mph.

TUESDAY
Mixing height above 5000 ft throughout the day.  Transport wind SW to W at 8 - 14 mph.  Surface wind light and variable during the morning becoming WSW to WNW at 6 - 10 mph during the afternoon.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Saturday, November 7, 2009.
=================================================================

Coast Range

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


Cascades

All zones except zone 611
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Zone 611
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.


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

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