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

Thu Sep 16 14:51:11 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Thursday, September 16, 2010       2:30 PM      Pete Parsons

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

    FRIDAY

A very moist southwesterly flow aloft is forecast to direct another weather system onshore.  Unlike the system that brought rain to mainly northwestern Oregon Wednesday night and early Thursday, rainfall from this cold front will likely spread across all of western Oregon, with significant rainfall over southern districts.

     OUTLOOK (SATURDAY-MONDAY)

The moist southwesterly flow aloft will continue over the weekend.  Rain should be widespread across western Oregon with the parent upper-level trough bringing another surge of rain Saturday night and Sunday.  Colder air aloft will keep showers going into Monday with the snow level dropping to 7000 feet north and 8000 feet south.

2.  DISPERSION

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

MORNING

Mixing height below 500 ft early rising to 1000 - 2000 ft by late morning.

Transport wind S to SW at 6 - 10 mph.

Surface wind SSE to SSW at 4 - 8 mph.

AFTERNOON

Mixing height 2000 - 3000 ft.

Transport wind SSW to W at 6 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1500 ft.

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

Surface wind becomes light and variable but favors s and controlled by local terrain.

Zone 605-611 (North Cascades):

MORNING

Mixing height below 500 ft early rising to 2000 - 3000 ft by late morning.

Transport wind SSE to SSW at 4 - 8 mph.

Surface wind light and variable but favors SE to SW and controlled by local terrain.

AFTERNOON

Mixing height 3000 - 4000 ft.

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

Surface wind increases to WSW to WNW at 4 - 8 mph.

EVENING

Mixing height 1000 - 2000 ft.

Transport wind becomes light and variable but favors SE to SW and controlled by local terrain.

Surface wind becomes light and variable but favors SE to SW and controlled by local terrain.

Zone 615-620 (South Coast Range):

MORNING

Mixing height below 500 ft early rising to 2000 - 3000 ft by late morning.

Transport wind SSE to SSW at 5 - 9 mph.

Surface wind light and variable but favors S and controlled by local terrain.

AFTERNOON

Mixing height 2300 - 3300 ft.

Transport wind SSW to WSW at 8 - 12 mph.

Surface wind similar to morning.

EVENING

Mixing height 1000 - 1500 ft.

Transport wind becomes light and variable but favors S and controlled by local terrain.

Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING

Mixing height below 500 ft early rising to 3000 - 4000 ft by late morning.

Transport wind SSE to SSW at 8 - 12 mph.

Surface wind light and variable but favors S and controlled by local terrain.

AFTERNOON

Mixing height 4000 - 5000 ft.

Transport wind SSW to WSW at 8 - 12 mph.

Surface wind increases to WSW to WNW at 4 - 8 mph.

EVENING

Mixing height 1000 - 2000 ft.

Transport wind becomes light and variable but favors SE to SW and controlled by local terrain.

Surface wind becomes light and variable but favors S and controlled by local terrain.

OUTLOOK:

SATURDAY

Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising to 3400 to 4400 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SUNDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind SSE to SSW at 4 - 8 mph during the morning becoming S to SW at 4 - 8 mph during the afternoon.  Surface wind light and variable.

MONDAY

Mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind SW to W at 8 - 12 mph.  Surface wind SSW to WSW at 4 - 8 mph during the morning becoming WSW to NW at 4 - 8 mph during the afternoon.

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

These instructions are valid for burning conducted on Friday, September 17, 2010.

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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.)  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.

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, 616 west of R8W, 619, and 620

Units should be 1500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.  Higher tonnage is possible south of T29S in Zone 616.  Call the forecaster.  South of T35S in Zone 620 units should be 500 tons or less, spaced 15 miles apart, and 15 miles from downwind SSRAs.

Zone 618

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

Cascades

All zones except zone 611

Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  Avoid ignitions north of T24S in Zone 616.

Zone 611

Units should be 750 tons or less, spaced 10 miles apart, and 12 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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