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

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Thursday, October 28, 2010       2:30 PM      Pete Parsons



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



FRIDAY



An upper-level trough will continue digging southward offshore, with the center of circulation forecast to be about 250 miles off the central California coastline by evening.  Skies will likely remain mostly cloudy, but rain will taper off from north to south.  Additional rainfall totals will generally be less than one-tenth of an inch with the greatest amounts in the south.  Transport winds will decrease and turn mainly E to SE with marginal to fair smoke dispersal conditions.


OUTLOOK (SATURDAY-MONDAY)


The upper-level trough will weaken and gets kicked inland Saturday with the main circulation center moving across northern California and Nevada.  A moist southwesterly flow aloft will keep skies mostly cloudy over all of Oregon with a few areas of light rain.  Transport winds will increase from the south with fair smoke dispersal conditions.



A Pacific cold front will likely spread rain back onshore Saturday evening and across western Oregon Sunday morning.  Snow levels will only drop to around 5000 feet north and 6000 feet south.  Precipitation is forecast to be greatest over Washington and northern Oregon with showers tapering off Sunday afternoon. Smoke dispersion should be fair Sunday, with a building ridge of high pressure rapidly lowering mixing heights Sunday evening.



A warm front will likely bring some rain to mainly coastal and northern areas Monday, with snow levels lifting above 8000 feet.  Increasing southerly transport winds should make for fair some dispersal conditions north, but southern areas could be more stagnant.



2.  DISPERSION



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



MORNING

Mixing height 1000 - 1700 ft.

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

Surface wind light and variable but favors NE to E and controlled by local terrain.



AFTERNOON

Mixing height rising to 1800 - 2800 ft.

Transport wind increases to NE to ESE at 4 - 8 mph.

Surface wind similar to morning.



EVENING

Mixing height lowers below 1000 ft.

Transport wind NE to E at 4 - 8 mph.

Surface wind similar to afternoon.



Zone 605-611 (North Cascades):



MORNING

Mixing height 1300 - 2300 ft.

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

Surface wind light and variable but favors NE to E and controlled by local terrain.



AFTERNOON

Mixing height rising to 2400 - 3400 ft.

Transport wind similar to morning.

Surface wind similar to morning.



EVENING

Mixing height lowers below 1000 ft.

Transport wind increases to N to ESE at 4 - 8 mph.

Surface wind similar to afternoon.



Zone 615-620 (South Coast Range):



MORNING

Mixing height 2000 - 3000 ft.

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

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



AFTERNOON

Mixing height 3000 - 4000 ft.

Transport wind increases to ESE to SSE at 4 - 8 mph.

Surface wind similar to morning.



EVENING

Mixing height 1000 - 1500 ft.

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

Surface wind similar to afternoon.



Zone 616-623 (South Cascades):



MORNING

Mixing height 2000 - 3000 ft.

Transport wind SE to S at 6 - 10 mph.

Surface wind SE to S at 4 - 8 mph.



AFTERNOON

Mixing height 3000 - 4000 ft.

Transport wind similar to morning.

Surface wind ESE to SSE at 4 - 8 mph.



EVENING

Mixing height 1000 - 2000 ft.

Transport wind E to SE at 6 - 10 mph.

Surface wind ENE to ESE at 4 - 8 mph.



OUTLOOK:



SATURDAY

In the north mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3300 to 4300 ft during the afternoon.  In the south mixing height below 1000 ft early rising to 1400 to 2400 ft by late morning rising to 3300 to 4300 ft during the afternoon.  Transport wind SE to S at 6 - 10 mph during the morning becoming SSE to SSW at 14 - 28 mph during the afternoon.  Surface wind light and variable during the morning becoming SE to SSW at 5 - 9 mph during the afternoon.



SUNDAY

Mixing height 2900 to 3900 ft throughout the day.  Transport wind S to SSW at 18 - 32 mph.  Surface wind SE to S at 4 - 8 mph.



MONDAY

Mixing height below 1000 ft early rising to 1200 to 2200 ft by late morning rising to 2800 to 3800 ft during the afternoon.  Transport wind SSE to SSW at 10 - 20 mph.  Surface wind SE to SSW at 5 - 9 mph.



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

These instructions are valid for burning conducted on Friday, October 29, 2010.

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



Coast Range



All Zones

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





Cascades



Zone 605 and 606

No burning allowed. A few small units are possible away from the SSRA.  Call the forecaster.



Zone 607 and 608

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



Zone 609, 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 750 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.  Avoid ignitions north of T24S.  South of T29S higher tonnage is possible.  Call the forecaster.



Zone 617, 620, and 622

Units should be 1000 tons or less, spaced 10 miles apart, and 12 miles from downwind SSRAs.



Zone 623

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





Siskiyous

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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_west/attachments/20101028/684875c6/attachment.html>