SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Saturday, June 5, 2010       2:35 PM      Pete Parsons



1.  DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638



    SUNDAY


The strong westerly jet stream that has already brought two soaking storms to the region will direct another wet weather system across Washington and Oregon.  Significant rainfall is possible again across northeastern Oregon.  Although rainfall totals from this system should generally be less than from the previous two storms, it will help to maintain the areas of minor to moderate flooding already occurring. Clouds and rain will cool surface temperatures back below normal.  Smoke dispersal conditions will be good with high daytime mixing heights and increasing onshore flow.

    OUTLOOK (MONDAY-WEDNESDAY)

No major change to the overall weather pattern is expected.  However, the region will get another brief break between storms on Monday, with skies becoming partly to mostly sunny in the afternoon.  Temperatures will warm to near normal.  Yet another weather system is forecast to bring back a chance of showers by Tuesday afternoon with showers likely Wednesday along with a chance of afternoon thunderstorms.  Temperatures will cool back below normal.  The cool and damp weather pattern is forecast to continue at least through Friday.  High afternoon mixing heights and strong onshore flow will provide good daytime smoke dispersal conditions during the outlook period.


2.  DISPERSION



SUNDAY



Zone 630 and 632:

Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2200 - 3200 ft during the evening.



Transport wind SSW to SW at 15 - 25 mph during the morning and afternoon.  Transport wind decreases to WSW to WNW at 9 - 15 mph during the evening.



Surface wind S to SW at 8 - 12 mph during the morning.  Surface wind shifts to WSW to WNW at 10 - 16 mph during the afternoon then decreases to W to NW at 4 - 8 mph during the evening.



Zone 633 - 638:

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning.  Afternoon mixing height rises to 3500 - 4500 ft then lowers to 1600 - 2600 ft during the evening.



Transport wind SSW to SW at 12 - 22 mph throughout the morning and afternoon.  Transport wind shifts to WNW to NW and decreases to 8 - 12 mph during the evening.



Surface wind SSE to SSW at 6 - 10 mph throughout the morning and afternoon.  Surface wind shifts to WNW to NNW and decreases to 4 - 8 mph during the evening.



OUTLOOK:



MONDAY

Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



TUESDAY

Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning and through the afternoon.  Transport wind SSW to SW at 8 - 12 mph during the morning becoming WSW to WNW at 10 - 20 mph during the afternoon.  Surface wind light and variable during the morning becoming WSW to WNW at 8 - 12 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind WSW to WNW at 9 - 15 mph.  Surface wind WSW to WNW at 8 - 12 mph.



3.  BURNING INSTRUCTIONS FOR NORTHEAST OREGON ZONES 630-638

    The following considerations should be adhered to in addition to

    the requirements of the Oregon Smoke Management Plan. These

    Instructions are valid for burning conducted on Sunday, June 6, 2010.

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



Zone 630 and 632:

Avoid ignitions within 12 miles to the SSW through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.



Zone 633 - 638:

Avoid ignitions within 12 miles to the S through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  Watch for shifting transport winds.



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

4.  SPECIAL NOTE:



    The smoke management forecaster is available at (503)-

    945-7401. Please call this number and not individual's

    numbers to discuss daily burning.  For large burns (over

    2000 tons) or burns extending over a considerable period,

    please request a special forecast.  Avoid calling before

    8 a.m. and between 2 to 3 p.m.



    This 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

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