SMI West (Smoke Management Instructions) (no subject)

Mon Feb 14 08:08:36 PST 2011

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Monday, February 14, 2011       7:30 AM      Jim Little

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

A low pressure system off the northern California coast is headed northeastward toward Vancouver Island this morning.  The low is embedded in a broad cold trough is located over the northern Pacific Ocean.  This is giving a generally southwesterly flow aloft over the region.  Rainfall will be increasing in northwestern Oregon this afternoon but amounts during the day will only reach a tenth of an inch or so.  Expect heavier amounts this evening and overnight.  Much of southwestern Oregon should remain dry during the day.  As the low tracks northward strong gusty winds will develop tonight and high wind warnings are out for coastal regions of the state.  Mixing heights are quite high and smoke dispersal conditions are good today.

With the renewed rainfall and anticipated lowering snow levels after today we will suspend writing daily forecasts beginning this afternoon.  Forecasts will resume when burning conditions improve and activity increases.  In the meantime individual burns may be handled by calling the Smoke Management forecast desk in Salem at 503-945-7401.

2.  DISPERSION

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

MORNING

Mixing height above 5000 ft.

Transport wind SSW at 25 - 45 mph.

Surface wind SSW to SW at 14 - 28 mph.

AFTERNOON

Mixing height above 5000 ft.

Transport wind SSW at 29 - 49 mph.

Surface wind similar to morning.

EVENING

Mixing height remains above 5000 ft.

Transport wind SW at 26 - 46 mph.

Surface wind SSW to WSW at 15 - 29 mph.

Zone 605-611 (North Cascades):

MORNING

Mixing height above 5000 ft.

Transport wind SSW at 22 - 40 mph.

Surface wind SSW at 20 - 36 mph.

AFTERNOON

Mixing height above 5000 ft.

Transport wind SSW at 18 - 32 mph.

Surface wind SSW to SW at 16 - 30 mph.

EVENING

Mixing height remains above 5000 ft.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING

Mixing height above 5000 ft.

Transport wind SSW at 20 - 36 mph.

Surface wind S to SSW at 15 - 29 mph.

AFTERNOON

Mixing height 4200 - 5000 ft.

Transport wind SSW at 22 - 40 mph.

Surface wind SSW at 18 - 32 mph.

EVENING

Mixing height rising above 5000 ft.

Transport wind decreases to SSW to SW at 18 - 30 mph.

Surface wind SSW to SW at 15 - 25 mph.

Zone 616-623 (South Cascades):

MORNING

Mixing height 4000 - 5000 ft.

Transport wind SSE to SSW at 14 - 28 mph.

Surface wind SSE to S at 15 - 25 mph.

AFTERNOON

Mixing height 3900 - 4900 ft.

Transport wind SSW to SW at 16 - 30 mph.

Surface wind SSW to SW at 13 - 25 mph.

EVENING

Mixing height 3800 - 4800 ft.

Transport wind SSW at 20 - 34 mph.

Surface wind S to SSW at 15 - 29 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA

These instructions are valid for burning conducted on Monday, February 14, 2011.

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

Coast Range

Zone 601 and 612

Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  North of Tillamook in Zone 601, use standard guidance matrix. (See section 5 below.)

Zone 602 and 603

Units should be 750 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  North of T3N in Zone 602, use standard guidance matrix. (See section 5 below.)

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 616 east of R9W

Units should be 750 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.

Cascades

All zones except zone 611

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA in Zone 605 and 606.  Avoid ignitions north of T24S in Zone 616.

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 8 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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