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: Tuesday, October 26, 2010       2:35 PM      Jim Little



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


    WEDNESDAY
A ridge of high pressure in the upper atmosphere covers the Pacific Northwest on Wednesday but an upper level low is also intensifying about 450 miles west of Brookings.  Skies will be partly cloudy and transport winds will be generally southwesterly through southeasterly.  Maximum mixing heights will be in the 3500 to 4000 foot range for fair smoke dispersal conditions
    EXTENDED OUTLOOK (THURSDAY - SATURDAY)
The upper level low moves to about 400 miles west of San Francisco on Thursday.  Upper flow over Oregon backs to southwesterly. Warm air aloft suppresses mixing heights for just marginal smoke dispersal conditions.  On Friday the upper level low drops southward to off the southern California coast.  Very limited moisture remains over the Pacific Northwest for mostly dry conditions.  Smoke dispersal conditions remain marginal.  On Saturday the upper low opens up and moves northeast as a weak upper level trough.  Smoke dispersal conditions will be slow to improve and the southerly transport winds of Friday will continue.



2.  DISPERSION



WEDNESDAY



Zone 630 and 632:

Mixing height below 1000 ft early rising to 1700 - 2700 ft by late morning.  Afternoon mixing height rises to 3300 - 4300 ft then lowers to 2500 - 3500 ft during the evening.



Transport wind SSE to S at 12 - 24 mph during the morning.  Transport wind increases to SSE to SSW at 22 - 38 mph during the afternoon and increases to SSE to SSW at 25 - 45 mph during the evening.



Surface wind SE to S at 10 - 16 mph during the morning.  Surface wind increases to SSE to SSW at 13 - 25 mph during the afternoon and evening.



Zone 633 - 638:

Mixing height below 1000 ft early rising to 1400 - 2400 ft by late morning.  Afternoon mixing height rises to 3300 - 4300 ft then lowers to 2500 - 3500 ft during the evening.



Transport wind SE to S at 10 - 16 mph during the morning.  Transport wind increases to SSE to S at 16 - 30 mph during the afternoon and increases to SE to S at 20 - 36 mph during the evening.



Surface wind SE to S at 8 - 14 mph during the morning.  Surface wind increases to SE to S at 10 - 22 mph during the afternoon and evening.



OUTLOOK:



THURSDAY

Mixing height 1500 to 2500 ft throughout the day.  Transport wind SSE to S at 17 - 31 mph.  Surface wind SE to S at 10 - 18 mph.



FRIDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning and through the afternoon.  Transport wind light and variable during the morning becoming SSE to SW at 4 - 8 mph during the afternoon.  Surface wind light and variable.



SATURDAY

Mixing height below 1000 ft during the morning rising to 2700 to 3700 ft during the afternoon.  Transport wind light and variable during the morning becoming SSE to SSW at 5 - 9 mph during the afternoon.  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 Wednesday, October 27, 2010.

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



Zone 630 and 632:

Avoid ignitions within 12 miles to the SSE through S of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSE through S in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.



Zone 633 - 638:

Delay ignitions until 10:00am.  Avoid ignitions within 15 miles to the SE through S of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SE through S in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  Recommend against burning units that will smolder significantly overnight.



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

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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