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

Fri Jun 11 14:31:47 PDT 2010

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY

ISSUED: Friday, June 11, 2010       2:30 PM      Pete Parsons

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

    SATURDAY

An upper-level ridge will move over western Oregon Saturday for dry and warmer conditions.  Transport winds will turn offshore with surface temperatures warming to about 5-10 degrees above normal.  Daytime heating should yield high afternoon mixing heights.  Clearing skies will allow temperatures and mixing heights to quickly drop off in the evening, with residual smoke staying near the ground.

    OUTLOOK (SUNDAY-TUESDAY)

A mostly dry cold front is forecast to push the ridge east of the Cascades Sunday.  A return to onshore flow will likely cool northern zone temperatures several degrees, with northerly transport winds holding southern zones temperatures close to Saturday's values. Onshore flow is forecast to increase across all zones Monday and Tuesday, as a weak upper-level trough comes onshore and turns the flow aloft southwesterly.  Temperatures should cool back below normal north and to near normal south.  Marine low clouds will likely invade the inland northern and central zones, west of the Cascade crest, with some drizzle or showers possible along mainly the western slopes of the northern coast and Cascade ranges.  Skies will likely stay mostly sunny across the extreme southern and eastern zones, where transport winds remain more northerly.  Daytime heating should yield moderately high afternoon mixing heights each day.

2.  DISPERSION

Zone 601, 602, 603, 612 and 615-620 (North and South Coast Range):

MORNING

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.

Transport wind NNE to ENE at 5 - 9 mph.

Surface wind N to NE at 4 - 8 mph.

AFTERNOON

Mixing height rising to 4000 - 5000 ft.

Transport wind shifts to NW to N at 9 - 15 mph.

Surface wind NW to N at 6 - 10 mph.

EVENING

Mixing height lowers below 1500 ft after sunset.

Transport wind NNW to N at 10 - 22 mph.

Surface wind NW to NNW at 10 - 16 mph.

Zone 605-611 and 616-623 (North and South Cascades):

MORNING

Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning.

Transport wind NNE to ENE at 6 - 10 mph.

Surface wind NNE to ENE at 4 - 8 mph.

AFTERNOON

Mixing height above 5000 ft.

Transport wind NNW to NNE at 9 - 15 mph.

Surface wind NNW to NNE at 8 - 12 mph.

EVENING

Mixing height lowers below 2000 ft after sunset.

Transport wind similar to afternoon.

Surface wind similar to afternoon.

OUTLOOK:

SUNDAY

Mixing height below 1000 ft early rising to 3100 to 4100 ft by late morning rising to 4200 to 5000 ft during the afternoon.  Transport wind NNW to NNE at 6 - 12 mph during the morning becoming NW to N at 10 - 20 mph during the afternoon.  Surface wind NNW to NNE at 4 - 8 mph during the morning becoming NW to N at 10 - 16 mph during the afternoon.

MONDAY

Mixing height below 1000 ft early rising to 3100 to 4100 ft by late morning rising to 4200 to 5000 ft during the afternoon.  Transport wind NNW to N at 10 - 22 mph during the morning becoming NNW to N at 16 - 26 mph during the afternoon.  Surface wind NW to N at 9 - 15 mph.

TUESDAY

Mixing height 2200 to 3200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NNW to NNE at 9 - 15 mph.  Surface wind NNW to NNE at 8 - 12 mph.

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

These instructions are valid for burning conducted on Saturday, June 12, 2010.

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

Coast Range

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 Waldport in Zone 612.  Call the forecaster.  Restrict units to 500 tons or less south of T30S in Zone 616.

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 T17S in Zone 603.  Call the forecaster.

Zone 615

Units should be 2000 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.

Zone 618 and 619

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

Zone 620

Units should be 500 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.  Higher tonnage is possible south of the Rogue River.  Call the forecaster.

Cascades

Zone 605, 606, and 616

Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA in Zone 605 and 606.  Higher tonnage is possible south of T20S in Zone 606.  Call the forecaster.  South of T30S in Zone 616 units should be 500 tons or less, spaced 5 miles apart.

Zone 607, 608, and 617

Units should be 2000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  South of T30S in Zone 617 units should be 750 tons or less, spaced 5 miles apart.

Zone 609, 610, and 611

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

Zone 620 and 622

Units should be 500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 623

Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.  South of T36S, use standard guidance matrix. (See section 5 below.)

Siskiyous

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

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

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.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_west/attachments/20100611/99448b5d/attachment.html>