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

Sat May 2 14:19:21 PDT 2009

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Saturday, May 2, 2009       2:30 PM      Nick Yonker

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

First front went through this morning.  Another front will move in from the southwest tonight carried along by a strong SW'erly jet stream.  Moist and unstable southwesterly flow will continue into Sunday before rainfall dissipates during the late morning to early afternoon.  Expect good to excellent mixing and smoke dispersion.

    OUTLOOK (MONDAY - WEDNESDAY)

Upper level trough will remain in the eastern Pacific continuing to pump in more fronts.  Next front arrives Monday afternoon to evening and promises to bring plenty of rain and wind.  Rain turns to showers Tuesday with some brief drying.  Then another front will move Tuesday evening to Wednesday morning.  Expect continued good mixing and smoke dispersion through the period.

2.  DISPERSION

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

MORNING
Mixing height above 5000 ft.
Transport wind light and variable but favors S to SW.
Surface wind light and variable but favors S to SW.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to SW to WSW at 8 - 12 mph.
Surface wind increases to SSW to WSW at 6 - 10 mph.

EVENING
Mixing height 3000 - 4000 ft.
Transport wind SSW to WSW at 10 - 18 mph.
Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING
Mixing height above 5000 ft.
Transport wind light and variable but favors SW to W.
Surface wind light and variable but favors SW to W.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to SW to WNW at 6 - 12 mph.
Surface wind increases to WSW to WNW at 8 - 12 mph.

EVENING
Mixing height 3000 - 4000 ft.
Transport wind SW to W at 6 - 12 mph.
Surface wind SW to WNW at 6 - 10 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind light and variable but favors SW to W.
Surface wind light and variable but favors SW to W.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to W to NW at 8 - 14 mph.
Surface wind increases to W to NW at 8 - 14 mph.

EVENING
Mixing height 2800 - 3800 ft.
Transport wind WSW to WNW at 6 - 10 mph.
Surface wind WSW to WNW at 5 - 9 mph.

OUTLOOK:

MONDAY
In the north mixing height below 1000 ft early, rising to 3300 to 4300 ft by late morning rising above 5000 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSE to SSW at 10 - 16 mph during the morning becoming SSE to SSW at 22 - 38 mph during the afternoon.  Surface wind SE to S at 5 - 9 mph during the morning becoming SSE to S at 12 - 22 mph during the afternoon.

TUESDAY
Mixing height above 5000 ft throughout the day.  Transport wind SSW to SW at 15 - 25 mph.  Surface wind S to SSW at 8 - 14 mph.

WEDNESDAY
Mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to SW at 20 - 35 mph.  Surface wind S to SW at 10 - 18 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Sunday, May 3, 2009.
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Coast Range

Zone 601 and 612
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)

Zone 602, 603, and 620
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Units may be 750 tons or less, spaced 5 miles apart, south of the Siuslaw River in Zone 603.  Higher tonnage is possible south of T35S in Zone 620.  Call the forecaster.

Zone 615
Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W
Units should be 1200 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 616 east of R9W
Units should be 750 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 618
Use standard guidance matrix. (See section 5 below.)

Zone 619
Units should be 2000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Cascades

Zone 605, 606, 607, 608, 609, 616, 617, 622, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T15S through T20S in Zone 608 units should be 1000 tons or less, spaced 5 miles apart.

Zone 610, 611, and 620
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Siskiyous
Units should be 1500 tons or less, spaced 5 miles apart, and 10 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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