SMI South Central (Smoke Management Instructions) South Central Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

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

ISSUED: Monday, December 7, 2009       7:30 AM      Jim Little
1.      DISCUSSION AND FORECAST FOR THE WESTERN OREGON AREA FORECAST ZONES 601-623

A cold, dry, week with a fairly stable atmosphere is in store for western Oregon.  An arctic air mass has overspread Oregon.  A strong high in the northern Gulf of Alaska combined with an upper low over southern Oregon is giving northeast winds aloft over the region.  Surface and transport winds will be generally northeasterly and quite strong except in southwest Oregon where winds will be lighter and more northerly.  Mixing heights will provide for mostly generally marginal to fair smoke dispersal conditions.

2.  DISPERSION

Zone 601, 602, 603 and 612 (North Coast Range):

MORNING
Mixing height 2100 - 3100 ft.
Transport wind NE to E at 12 - 24 mph.
Surface wind NE to E at 10 - 18 mph.

AFTERNOON
Mixing height lowers to 1500 - 2500 ft.
Transport wind similar to morning.
Surface wind NE to ENE at 9 - 15 mph.

EVENING
Mixing height 1000 - 1900 ft.
Transport wind NE to ENE at 12 - 22 mph.
Surface wind NNE to ENE at 6 - 12 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind E to SE at 10 - 16 mph.
Surface wind E to ESE at 10 - 18 mph.

AFTERNOON
Mixing height lowers to 2400 - 3400 ft.
Transport wind E to ESE at 8 - 12 mph.
Surface wind ENE to ESE at 6 - 12 mph.

EVENING
Mixing height rising to 3600 - 4600 ft.
Transport wind E to SE at 8 - 14 mph.
Surface wind E to SE at 8 - 12 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height 1800 - 2800 ft.
Transport wind ENE to ESE at 5 - 9 mph.
Surface wind ENE to ESE at 4 - 8 mph.

AFTERNOON
Mixing height 2800 - 3800 ft.
Transport wind shifts to N to NE at 6 - 12 mph.
Surface wind shifts to NNW to NE at 5 - 9 mph.

EVENING
Mixing height lowers below 1000 ft.
Transport wind shifts to NE to E at 5 - 9 mph.
Surface wind becomes light and variable and controlled by local terrain.

Zone 616-623 (South Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind ENE to ESE at 9 - 15 mph.
Surface wind ENE to ESE at 8 - 14 mph.

AFTERNOON
Mixing height 4100 - 5000 ft.
Transport wind ENE to ESE at 5 - 9 mph.
Surface wind ENE to ESE at 4 - 8 mph.

EVENING
Mixing height lowers below 1000 ft.
Transport wind similar to afternoon.
Surface wind becomes light and variable and controlled by local terrain.

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

Coast Range

Zone 601, 602, 603, 612, 615, 616 west of R8W, 618, 619, and 620
Use standard guidance matrix. (See section 5 below.)  Avoid burning directly upwind of coastal SSRAs.

Zone 616 east of R9W
Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.


Cascades

Zone 605 and 606
No burning allowed.

Zone 607 and 608
Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 609, 610, and 611
Units should be 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 616 and 617
Units should be 750 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 620, 622, and 623
Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.


Siskiyous
Units should be 1500 tons or less, spaced 8 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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