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 26, 2010       2:35 PM      Pete Parsons



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



    SUNDAY


A flat upper-level ridge is forecast to get forced east of the state by a strengthening southwesterly flow aloft.  A surface thermal trough will begin the day near the Cascades and progress eastward, into eastern Oregon, by evening.  That will induce onshore flow into the western most zones late in the day with continued light, mostly southerly, transport winds across the eastern zones.  Temperatures will be well above normal under sunny skies. High daytime mixing heights will provide good smoke dispersal conditions.

    OUTLOOK (MONDAY-WEDNESDAY)

As a fairly strong upper-level trough slowly approaches the coastline, southwesterly flow aloft will increase across Oregon Monday and Tuesday.  The surface thermal trough is forecast to shift eastward, to near the Oregon/Idaho border.  Increasing onshore flow will likely bring several degrees of cooling to the western zones each day, with eastern zones seeing the cooling by Tuesday.  A few showers or thunderstorms may develop over the eastern mountains late Monday, with a better chance of late-day showers or thunderstorms on Tuesday. The upper-level trough is forecast to finally move over Oregon Wednesday.  Onshore transport winds and cool air aloft will drop temperatures to below normal and likely produce at least a few mountain showers. Smoke dispersal conditions should be good during the outlook period, although transport winds will be mostly light and somewhat variable, over the eastern zones, Monday and Tuesday.


2.  DISPERSION



SUNDAY



Zone 630 and 632:

Mixing height below 500 ft early rising to 4300 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2000 - 3000 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to WSW to NW at 4 - 8 mph during the afternoon then shifts and increases to NW to NNW at 10 - 20 mph during the evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WSW to NW at 4 - 8 mph during the afternoon then shifts and increases to NW to N at 8 - 12 mph during the evening.



Zone 633 - 638:

Mixing height below 500 ft early rising to 4300 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2000 - 3000 ft during the evening.



Transport wind light and variable and controlled by local terrain.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



MONDAY

Mixing height below 1000 ft early rising to 4200 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WSW to WNW at 8 - 14 mph during the afternoon.  Surface wind light and variable during the morning becoming WSW to WNW at 8 - 12 mph during the afternoon.



TUESDAY

Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming SW to W at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to W at 6 - 10 mph during the afternoon.



WEDNESDAY

Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 4 - 8 mph during the morning becoming NW to NNW at 8 - 12 mph during the afternoon.  Surface wind WNW to NNW at 4 - 8 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 27, 2010.

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



Zone 630 and 632:

Avoid ignitions within 10 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles in all directions of SSRAs.



Zone 633 - 638:

Avoid ignitions within 10 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles in all directions of SSRAs.



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

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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