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

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Fri Jun 25 14:26:52 PDT 2010


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Friday, June 25, 2010       2:35 PM      Pete Parsons



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



    SATURDAY


A flat upper-level ridge will move over Oregon, with a stabilizing northwesterly flow aloft and at transport level, putting an end to the locally heavy showers and thundershowers of the past couple of days.  Skies should become mostly sunny with near normal temperatures.  Smoke dispersal conditions should be good.

    OUTLOOK (SUNDAY-TUESDAY)

The flat upper-level ridge is forecast to get forced east of the state Sunday by a strengthening southwesterly flow aloft.  A weak surface thermal trough will shift over the region by late in the day, with decreasing transport winds and warmer temperatures.  Southwesterly flow aloft will increase Monday and Tuesday with the surface thermal trough slowly progressing eastward across the region.  Eastern zones will likely have light transport winds, with even warmer temperatures, while increasing onshore flow brings several degrees of cooling to the western zones.  There may be enough instability for late-day showers and thunderstorm to develop over the eastern mountains on Monday, with a much better chance of showers and thunderstorms over mainly the eastern mountains by Tuesday.  Smoke dispersal conditions should be good during the outlook period, although transport winds will be mostly light and somewhat variable over the eastern zones.


2.  DISPERSION



SATURDAY

Mixing height below 500 ft early rising to 4000 - 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 NW to N at 6 - 12 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 6 - 10 mph during the afternoon and evening.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising to 3600 to 4600 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



MONDAY

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.  Surface wind light and variable.



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 S to SW at 6 - 10 mph during the morning becoming WSW to WNW at 6 - 10 mph during the afternoon.  Surface wind SSE to SSW at 4 - 8 mph during the morning becoming WSW to NW at 6 - 10 mph during the afternoon.



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 Saturday, June 26, 2010.

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



Avoid ignitions within 10 miles to the W through NNE 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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