SMI West (Smoke Management Instructions) (no subject)

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Wednesday, December 1, 2010       2:30 PM      Jim Little



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


    THURSDAY
A weak upper disturbance moves across the region.  Skies will be cloudy with a few showers north, while more significant and steady rain continues in the south.  The snow level will be around 3000 feet.  Transport winds will be generally south-southwesterly in the north and northwesterly in the south.  The atmosphere will be fairly stable and smoke dispersal conditions will be marginal in the coast range and poor in the Cascades.
    EXTENDED OUTLOOK (FRIDAY - SUNDAY)
An upper low in the Gulf of Alaska drops southeast to a position about 500 miles off the Oregon coast Thursday.  This will induce a ridge over the Pacific Northwest.  Weather will be generally dry west of the cascades, but the atmosphere will again be very stable.  Expect poor ventilation conditions with best ventilation over the southern coast range.  On Friday the upper low moves to about 600 miles west of San Francisco, California.  The ridge axis shifts east and this will allow the low to spread some moisture northward from California and Nevada.  Precipitation amounts should be very light, but the atmosphere will remain stable and ventilation conditions remain poor.  The remains of the upper low move closer to the California coast on Saturday.  Upper flow over the Pacific Northwest goes to nearly due southerly.  With warm air aloft and plenty of cloud cover and low sun angle for minimal surface heating, maximum mixing heights remain low and most of the region will experience poor ventilation conditions.



2.  DISPERSION



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



MORNING

Mixing height 1700 - 2700 ft.

Transport wind SSW to WSW at 4 - 8 mph.

Surface wind light and variable and controlled by local terrain.



AFTERNOON

Mixing height 2000 - 3000 ft.

Transport wind SW to WSW at 8 - 14 mph.

Surface wind similar to morning.



EVENING

Mixing height 1800 - 2800 ft.

Transport wind SSW to WSW at 10 - 18 mph.

Surface wind increases to SSW to WSW at 5 - 9 mph.



Zone 605-611 (North Cascades):



MORNING

Mixing height 1300 - 2300 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.



AFTERNOON

Mixing height 1300 - 2300 ft.

Transport wind increases to SSW to WSW at 6 - 10 mph.

Surface wind increases to SSW to WSW at 5 - 9 mph.



EVENING

Mixing height 1400 - 2400 ft.

Transport wind SSE to SSW at 8 - 12 mph.

Surface wind SSE to SSW at 6 - 10 mph.



Zone 615-620 (South Coast Range):



MORNING

Mixing height 1000 - 1800 ft.

Transport wind light and variable.

Surface wind light and variable and controlled by local terrain.



AFTERNOON

Mixing height rising to 2000 - 3000 ft.

Transport wind shifts to W to NW at 5 - 9 mph.

Surface wind increases to W to NW at 4 - 8 mph.



EVENING

Mixing height lowers below 1000 ft.

Transport wind shifts to SSW to WSW at 4 - 8 mph.

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



Zone 616-623 (South 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 1000 - 1600 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.



OUTLOOK:



FRIDAY

In the north mixing height 1000 to 1900 ft throughout the day.  In the south mixing height 500 to 500 ft during the morning rising to 1800 to 2800 ft during the afternoon.  Transport wind SSE to SSW at 4 - 8 mph during the morning becoming NE to E at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming NE to E at 4 - 8 mph during the afternoon.



SATURDAY

Mixing height below 1000 ft during the morning rising to 1200 to 2200 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



SUNDAY

Mixing height below 1000 ft during the morning rising to 1100 to 2100 ft during the afternoon.  Transport wind ESE to S 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, December 2, 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.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)



Zone 602 and 603

No burning allowed.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)  Units may be 750 tons or less, spaced 15 miles apart, south of the Siuslaw River in Zone 603.



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

Units should be 1500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.



Zone 620

Units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T35S.  Call the forecaster.





Cascades



Zone 605, 606, 607, 608, 609, 610, 617, and 623

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.



Zone 611

Units should be 750 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.



Zone 620 and 622

No burning allowed.





Siskiyous

Units should be 1000 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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