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

Tue Apr 13 13:12:03 PDT 2010

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

ISSUED: Tuesday, April 13, 2010       2:30 PM      Jim Little

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

An upper level low sets up about 200 miles west of Waldport, Oregon giving south to southwest flow aloft.  An upper short wave in this flow sill bring showers mainly to southwestern Oregon with those showers moving northward during the evening hours.

OUTLOOK (THURSDAY - SATURDAY)

On Thursday the upper low backs off and moves west, farther off the coast.  The upper short wave will rotate out of the state into Washington early in the morning leaving the region dry with a southerly flow aloft.  Expect good mixing heights and good burning conditions most areas.  On Friday the upper low continues off the coast with another weak short wave moving northward across the region producing scattered showers.  On Saturday a front develops offshore and moves to the northern coast late in the afternoon.  Elsewhere expect dry weather with strong southerly transport winds and mixing heights high enough for good smoke dispersal conditions.

    OUTLOOK (THURSDAY - SATURDAY)

2.  DISPERSION

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

MORNING
Mixing height 2100 - 3100 ft.
Transport wind NE to E at 4 - 8 mph.
Surface wind NE to E at 4 - 8 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind becomes light and variable.
Surface wind becomes light and variable and controlled by local terrain.

EVENING
Mixing height 1000 - 1600 ft.
Transport wind increases to NW to NNW at 10 - 16 mph.
Surface wind increases to WNW to NNW at 6 - 10 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height 4300 - 5000 ft.
Transport wind NNW to NNE at 4 - 8 mph.
Surface wind NNW to NE at 4 - 8 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind becomes light and variable.
Surface wind becomes light and variable and controlled by local terrain.

EVENING
Mixing height 1100 - 2100 ft.
Transport wind increases to N to NE at 4 - 8 mph.
Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING
Mixing height 2000 - 3000 ft.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height 3000 - 5000 ft.
Transport wind shifts to SSW to W at 6 - 10 mph.
Surface wind increases to SW to W at 4 - 8 mph.

EVENING
Mixing height lowers below 1000 ft.
Transport wind shifts to SSE to SW at 4 - 8 mph.
Surface wind becomes light and variable and controlled by local terrain.

Zone 616-623 (South Cascades):

MORNING
Mixing height 3500 - 4500 ft.
Transport wind SE to SSW at 4 - 8 mph.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind becomes light and variable.
Surface wind similar to morning.

EVENING
Mixing height 1400 - 2400 ft.
Transport wind increases to WSW to WNW at 4 - 8 mph.
Surface wind WSW to WNW at 4 - 8 mph.

OUTLOOK:

THURSDAY
In the north mixing height below 1000 ft early rising to 2900 to 3900 ft by late morning rising to 4200 to 5000 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 3600 to 4600 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.

FRIDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4400 to 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SATURDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSE to SSW at 8 - 14 mph.  Surface wind light and variable.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Wednesday, April 14, 2010.
=================================================================

Coast Range

Zone 601 and 612
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 602 and 603
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 615, 616 west of R8W, and 620
Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.  No burning allowed south of T35S in Zone 620.

Zone 616 east of R9W
Units should be 500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 618
Units should be 2000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Zone 619
Units should be 1500 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.

Cascades

Zone 605, 606, 620, and 622
Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 607 and 608
Units should be 2000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 609, 617, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Zone 610 and 611
Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 616
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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