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

Sun May 16 15:47:58 PDT 2010

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

ISSUED: Sunday, May 16, 2010       2:30 PM      Jim Little

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

    MONDAY

An upper level disturbance will move into northern California during the day and upper flow shifts from southwesterly to southerly.  This will push more moisture into the Pacific Northwest.  Rain spreads into the area early in the day.  Mixing heights will be generally in the three to four thousand foot range for fair to good smoke dispersal conditions.

    OUTLOOK (TUESDAY-THURSDAY)

An upper level low in the Gulf of Alaska keeps southwesterly flow aloft over the region for Tuesday.  There will be enough moisture for widely scattered showers.  Smoke dispersal conditions should be marginal to fair.  On Wednesday a well developed Pacific front will move into the area on Wednesday for widespread rain.  Smoke dispersal conditions should be fair to good.  Another system arrives Thursday afternoon for renewed rain with continued fair to good smoke dispersal conditions.

2.  DISPERSION

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

MORNING
Mixing height below 500 ft early rising to 2000 - 3000 ft by late morning.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising to 3500 - 4500 ft.
Transport wind increases to W to NW at 10 - 18 mph.
Surface wind increases to W to NW at 8 - 14 mph.

EVENING
Mixing height 1600 - 2600 ft.
Transport wind SW to W at 10 - 16 mph.
Surface wind SW to WNW at 6 - 10 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height below 1000 ft early rising to 1400 - 2400 ft by late morning.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising to 3500 - 4500 ft.
Transport wind increases to WSW to WNW at 6 - 10 mph.
Surface wind increases to WSW to WNW at 6 - 10 mph.

EVENING
Mixing height 2800 - 3800 ft.
Transport wind W to NW at 4 - 8 mph.
Surface wind W to NW at 4 - 8 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 500 ft early rising to 1500 - 2500 ft by late morning.
Transport wind light and variable.
Surface wind light and variable and controlled by local terrain.

AFTERNOON
Mixing height rising to 4000 - 5000 ft.
Transport wind increases to SSW to WSW at 5 - 9 mph.
Surface wind increases to SSW to WSW at 4 - 8 mph.

EVENING
Mixing height 2900 - 3900 ft.
Transport wind S 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 below 500 ft early rising above 5000 ft by late morning.
Transport wind SW to W at 4 - 8 mph.
Surface wind SW to W at 4 - 8 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind shifts to SSE to SSW at 8 - 14 mph.
Surface wind shifts to S to SW at 6 - 12 mph.

EVENING
Mixing height 1600 - 2600 ft.
Transport wind shifts to SSW to W at 4 - 8 mph.
Surface wind becomes light and variable and controlled by local terrain.

OUTLOOK:

TUESDAY
Mixing height 1900 to 2900 ft during the morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SSW to SW at 8 - 12 mph during the morning becoming SW to W at 9 - 15 mph during the afternoon.  Surface wind SSW to WSW at 6 - 10 mph during the morning becoming SW to W at 8 - 14 mph during the afternoon.

WEDNESDAY
Mixing height 1400 to 2400 ft during the morning rising to 4100 to 5000 ft during the afternoon.  Transport wind SSW to SW at 10 - 16 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

THURSDAY
Mixing height 1400 to 2400 ft during the morning rising to 3200 to 4200 ft during the afternoon.  Transport wind S to SW at 9 - 15 mph during the morning becoming SW to W at 8 - 12 mph during the afternoon.  Surface wind light and variable.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Monday, May 17, 2010.
=================================================================

Coast Range

***Avoid ignitions before 11:00am in Zone 602 and 603.***

Zone 601, 612, and 616 east of R9W
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.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.

Zone 602 and 603
Units should be 300 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Avoid burning in or near corridors.  Higher tonnage is possible south of the Siuslaw River in Zone 603.  Call the forecaster.

Zone 615
Units should be 1500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Zone 616 west of R8W
Units should be 1200 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of T29S.  Call the forecaster.

Zone 618, 619, and 620
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  South of T35S in Zone 620 units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

Cascades

Zone 605, 606, 607, 608, 609, 617, 620, 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 8 miles apart.

Zone 610 and 611
Units should be 1000 tons or less, spaced 8 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.  Avoid ignitions north of T24S.  South of T29S higher tonnage is possible.  Call the forecaster.

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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