SMI West (Smoke Management Instructions) (no subject)

Wed Nov 3 16:25:33 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Wednesday, November 3, 2010       2:30 PM      Jim Little

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

    THURSDAY
*** Poor to Marginal Smoke Dispersal Conditions Continue ***
Thursday's upper air pattern will be very similar to Wednesday's - just shifted slightly eastward.  Upper flow over the region will be from the southwest.  Low level flow, however, will be transitioning from offshore to onshore during the day.  Shifting transport winds will make burning close to SSRA's problematical.  Expect mixing heights generally between 1500 and 2000 feet and transport winds light south or southeast turning to west or northwest during the afternoon.
    EXTENDED OUTLOOK (FRIDAY - SUNDAY)
On Friday an upper level trough approaches from the west.  Associated cooler air aloft should allow for higher maximum mixing heights for improved ventilation conditions.  A weakening surface front associated with the trough reaches the coast by evening for some light rain Friday night.  The upper trough moves through early Saturday and there will be some stabilization during the mid part of the day.  However another relatively weak front will brings more rain during the afternoon.  Expect a few left-over showers Sunday, fair smoke dispersal conditions and transport winds mostly from the southwest.

2.  DISPERSION

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

MORNING

Mixing height below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height 1000 - 2000 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 605-611 (North Cascades):

MORNING

Mixing height below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 1300 - 2300 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 1000 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.

AFTERNOON

Mixing height rising to 1500 - 2500 ft.

Transport wind similar to morning.

Surface wind similar to morning.

EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 500 ft early rising to 1000 - 1600 ft by late morning.

Transport wind ESE to SSE at 5 - 9 mph.

Surface wind ESE to SSE at 4 - 8 mph.

AFTERNOON

Mixing height rising to 2000 - 3000 ft.

Transport wind becomes light and variable.

Surface wind becomes light and variable and controlled by local terrain.

EVENING

Mixing height lowers below 1000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

OUTLOOK:

FRIDAY

In the north mixing height below 1000 ft early rising to 1000 to 1600 ft by late morning rising to 1600 to 2600 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 1600 to 2600 ft by late morning rising to 2500 to 3500 ft during the afternoon.  Transport wind light and variable during the morning becoming W to NW at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 4 - 8 mph during the afternoon.

SATURDAY

In the north mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind S to SSW at 8 - 14 mph during the morning becoming SSW to SW at 12 - 24 mph during the afternoon.  Surface wind S to SW at 8 - 12 mph during the morning becoming light and variable during the afternoon.

SUNDAY

Mixing height below 1000 ft early rising to 1000 to 1900 ft by late morning rising to 2800 to 3800 ft during the afternoon.  Transport wind SW to W at 4 - 8 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 Thursday, November 4, 2010.

=================================================================

Coast Range

Zone 601, 612, and 616 east of R9W

Units should be 750 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 602 and 603

No burning allowed.

Zone 615 and 616 west of R8W

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

Zone 618 and 619

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

Zone 620

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

Cascades

Zone 605, 606, 620, and 622

No burning allowed.

Zone 607, 608, 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 1000 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 616

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

Siskiyous

Units should be 750 tons or less, spaced 15 miles apart, and 15 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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