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

Sun Apr 12 07:45:19 PDT 2009

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

ISSUED: Sunday, April 12, 2009       7:30 AM      Jim Little

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

A strong Pacific weather system will move into the region today.  A warm front is spreading rain into northwestern Oregon this morning.  A cold front will follow later today for more rain and blustery conditions.  Winds will initially be from the south but shift to westerly with the passage of the cold front.  Mixing heights will be high for good smoke dispersal conditions, but rainfall in the northern portion of the region will hamper any burning efforts.

2.  DISPERSION

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

MORNING
Mixing height 2300 - 3300 ft.
Transport wind SSW at 24 - 42 mph.
Surface wind SSE to SSW at 12 - 22 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind shifts to SW to W and decreases to 15 - 25 mph.
Surface wind SSW to WSW at 9 - 15 mph.

EVENING
Mixing height 4100 - 5000 ft.
Transport wind decreases to WSW to WNW at 9 - 15 mph.
Surface wind SSW to WSW at 5 - 9 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height 3700 - 4700 ft.
Transport wind S to SSW at 18 - 30 mph.
Surface wind SSE to SSW at 10 - 18 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind SW at 20 - 34 mph.
Surface wind shifts to SW to W at 9 - 15 mph.

EVENING
Mixing height remains above 5000 ft.
Transport wind decreases to SW to W at 10 - 22 mph.
Surface wind SW to WNW at 5 - 9 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height above 5000 ft.
Transport wind SSW to WSW at 9 - 15 mph.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 4200 - 5000 ft.
Transport wind SW to W at 9 - 15 mph.
Surface wind increases to SSW to W at 6 - 10 mph.

EVENING
Mixing height 2700 - 3700 ft.
Transport wind WSW to WNW at 8 - 14 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 SSW to WSW at 8 - 14 mph.
Surface wind SSW to WSW at 4 - 8 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind WSW to WNW at 8 - 14 mph.
Surface wind shifts to WSW to WNW at 8 - 14 mph.

EVENING
Mixing height 3000 - 4000 ft.
Transport wind similar to afternoon.
Surface wind W to NNW at 5 - 9 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Sunday, April 12, 2009.
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Coast Range

Zone 601 and 612
Units should be 750 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Restrict units in or near corridors to 500 tons or less.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)

Zone 602 and 603
Units should be 300 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Avoid burning in or near corridors.  Units may be 500 tons or less, spaced 8 miles apart, south of the Siuslaw River in Zone 603.

Zone 615
Units should be 1200 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W
Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 616 east of R9W and 620
Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.  Higher tonnage is possible south of T35S in Zone 620.  Call the forecaster.

Zone 618
Units should be 2000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 619
Units should be 1500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Cascades

All zones except zone 611
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  From T18S through T22S in Zone 608 units should be 1000 tons or less, spaced 5 miles apart.

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

Siskiyous
Units should be 1000 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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