SMI Northeast (Smoke Management Instructions) (no subject)

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Sunday, October 3, 2010       2:35 PM      Jim Little



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


    MONDAY
A full latitude upper level trough moves into the Pacific Northwest on Monday.  The atmosphere aloft cools considerably for higher maximum mixing heights.  By evening the axis of the trough will be over the Cascade crest and moving east.  Moisture rotation northward from California ahead of the trough should produce areas of light rain.  Transport winds should generally be from the northwest through north.
    EXTENDED OUTLOOK (TUESDAY - THURSDAY)
On Tuesday the southern portion of the upper trough cuts off as an upper level low over southern California leaving the Pacific Northwest under an upper level ridge oriented SW-NE.  Warmer aloft will suppress maximum mixing heights a bit.  Winds will be generally northerly to north-northeasterly.  On Wednesday the upper level low over California is nearly stationary and cut off from the main westerly flow aloft which is north of the Pacific Northwest.  Warm air aloft holds maximum mixing heights down in northeast zones and smoke dispersal conditions will only be fair there.  The upper low over California weakens on Thursday and moves off to the northeast.  Mixing heights recover for better ventilation except in the northeast where smoke dispersal conditions will be poor.



2.  DISPERSION



MONDAY



Zone 630 and 632:

Mixing height 1800 - 2800 ft during the morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 2200 - 3200 ft during the evening.



Transport wind WNW to NNW at 8 - 12 mph during the morning.  Transport wind increases to NW to N at 10 - 20 mph during the afternoon and increases to NNW to N at 16 - 30 mph during the evening.



Surface wind WNW to NNW at 6 - 10 mph during the morning.  Surface wind increases to NW to N at 9 - 15 mph during the afternoon and evening.



Zone 633 - 638:

Mixing height 1000 - 1800 ft during the morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 1300 - 2300 ft during the evening.



Transport wind WNW to NNW at 8 - 12 mph throughout the day.



Surface wind WNW to NNW at 6 - 10 mph.



OUTLOOK:



TUESDAY

In the west mixing height 1400 to 2400 ft during the morning rising to 3800 to 4800 ft during the afternoon.  In the east mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind N to NE at 9 - 15 mph during the morning becoming NNE to NE at 12 - 24 mph during the afternoon.  Surface wind NNW to NE at 6 - 10 mph during the morning becoming NNE to NE at 10 - 20 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft early rising to 1800 to 2800 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind ENE to ESE at 4 - 8 mph during the morning becoming light and variable during the afternoon.



THURSDAY

Mixing height below 1000 ft early rising to 2000 to 3000 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 Monday, October 4, 2010.

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



Zone 630 and 632:

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



Zone 633 - 638:

Delay ignitions until 10:00am.  Avoid ignitions within 15 miles to the WNW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the WNW through NNE in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4:00am.



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

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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