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, June 24, 2010       2:35 PM      Pete Parsons



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



    FRIDAY


A weak upper level trough will shift east of the Cascades by midday and progress to near the Idaho border by the evening.  The chance of afternoon showers or thundershowers will continue across mainly the eastern zones with northwesterly flow aloft and increasing onshore transport winds stabilizing the air mass over the western zones.  Temperatures will be near normal with fair to good smoke dispersion.

    OUTLOOK (SATURDAY-MONDAY)

A flat upper-level ridge will move over Oregon Saturday with a stable northwesterly flow both aloft and at transport level.  Skies should become mostly sunny with continued near normal temperatures.  The weakening ridge is forecast to get forced just east of the state Sunday and Monday by a strengthening southwesterly flow aloft.  A surface thermal trough is forecast to move over the region, with transport winds becoming generally light and temperatures shooting above normal.  No significant precipitation is expected during the outlook period, but a chance of showers will return by late Monday. Smoke dispersion should be fair to good during the outlook period.


2.  DISPERSION



FRIDAY



Zone 630 and 632:

Mixing height below 1500 ft early rising to 4300 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2500 - 3500 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to WNW to NNW at 8 - 14 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WNW to NNW at 8 - 14 mph during the afternoon and evening.



Zone 633 - 638:

Mixing height below 1500 ft early rising to 3200 - 4200 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 WNW to NNW at 6 - 10 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain.  Surface wind increases to NW to N at 5 - 9 mph during the evening.



OUTLOOK:



SATURDAY

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 NW to N at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 4 - 8 mph during the afternoon.



SUNDAY

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.



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.



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, June 25, 2010.

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



Zone 630 and 632:

Avoid ignitions within 10 miles to the W through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the W through N in or near drainages leading to SSRAs.



Zone 633 - 638:

Avoid ignitions within 12 miles to the W through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the WSW through N in or near drainages leading to 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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