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: Monday, October 4, 2010       2:35 PM      Jim Little



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


    TUESDAY
Monday's trough splits...a portion moves across central Canada and the rest becomes a cut-off low over southern California.  An upper ridge develops offshore and noses into Washington while a surface thermal trough develops in the central valley of California.  This will give a northerly or northeasterly flow most areas and dry weather for the region.  Warmer air aloft with the ridge will suppress mixing heights.  Smoke dispersal conditions will generally be fair to good.
    EXTENDED OUTLOOK (WEDNESDAY - FRIDAY)
The upper level cut-off low remains over southern California on Wednesday as a thermal trough builds northward overnight Tuesday to off the SW Oregon Coast.  Weather will remain dry but maximum mixing heights will deteriorate.  By Thursday afternoon the upper level low is pulling out over NE Nevada.  This will bring a chance of showers to the area.  Transport winds will be light an variable.  Recommend against planning any burns close to smoke sensitive areas on Thursday.  Friday some scattered showers are still possible from the remains of the upper level low.  Mixing heights will improve and transport winds will be generally SW-W.

2.  DISPERSION



TUESDAY



Zone 630 and 632:

Mixing height 1700 - 2700 ft during the morning.  Afternoon mixing height rises to 3800 - 4800 ft then lowers to 2800 - 3800 ft during the evening.



Transport wind N to NE at 10 - 16 mph during the morning.  Transport wind increases to NNE to ENE at 14 - 28 mph during the afternoon and evening.



Surface wind N to NE at 8 - 14 mph during the morning.  Surface wind increases to NNE to NE at 12 - 22 mph during the afternoon then decreases to NNE to NE at 8 - 14 mph during the evening.



Zone 633 - 638:



Transport wind NNE to NE at 12 - 22 mph throughout the day.



Surface wind NNE to NE at 10 - 20 mph during the morning and afternoon.  Surface wind decreases to NNE to ENE at 6 - 10 mph during the evening.





OUTLOOK:



WEDNESDAY

Mixing height below 1000 ft early rising to 1600 to 2600 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind NE to E at 4 - 8 mph during the morning becoming NNE to NE at 10 - 16 mph during the afternoon.  Surface wind light and variable during the morning becoming NNE to NE at 8 - 14 mph during the afternoon.



THURSDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3300 to 4300 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



FRIDAY

Mixing height below 1000 ft early rising to 1700 to 2700 ft by late morning rising to 4300 to 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 Tuesday, October 5, 2010.

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



Zone 630 and 632:

Avoid ignitions within 12 miles to the N through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the N through E 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:

Avoid ignitions within 15 miles to the NNE through ENE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the NNE through E in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4:00pm.



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

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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