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: Thursday, October 14, 2010       2:35 PM      Pete Parsons



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



FRIDAY



The upper-level flow will turn west-southwesterly, in the wake of a weak cold front that will be exiting the state.  A surface ridge of high pressure will nose onshore with northwesterly to northeasterly transport winds.  It will be cooler with partly cloudy skies and a chance of a morning shower, mainly over the mountains.  Afternoon smoke dispersal conditions will be fair to good.


OUTLOOK (SATURDAY-MONDAY)


The upper-level flow is forecast to turn a bit more southwesterly on Saturday, which will maintain dry conditions.  Warming aloft may begin to suppress afternoon mixing heights with slackening transport winds.  An upper-level trough is forecast to move into California on Sunday and Nevada on Monday, with a ridge amplifying over Oregon.  That will continue to bring dry weather to the region.  Afternoon smoke dispersal conditions will only be fair due to light transport winds and ridging aloft suppressing mixing.



2.  DISPERSION



FRIDAY

Mixing height below 1000 ft early rising to 2300 - 3300 ft by late morning.  Afternoon mixing height rises to 3400 - 4400 ft then lowers below 1000 ft during the evening.



Transport wind NW to N at 5 - 9 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon and evening.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



SATURDAY

Mixing height below 1000 ft early rising to 2100 to 3100 ft by late morning rising to 3800 to 4800 ft during the afternoon.  Transport wind light and variable during the morning becoming WSW to NW at 4 - 8 mph during the afternoon.  Surface wind light and variable.



SUNDAY

Mixing height below 1000 ft early rising to 1700 to 2700 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



MONDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



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 Friday, October 15, 2010.

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



Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4 p.m.



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

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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