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, November 1, 2010       2:35 PM      Jim Little



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


    TUESDAY
*** Marginal Smoke Dispersal Conditions ***
A strong high pressure area will be centered over Las Vegas, Nevada on Tuesday while a major trough develops about 1000 miles to the west in the Gulf of Alaska and eastern Pacific Ocean.  Upper flow over the area will be west-southwest with very stable conditions developing.  Expect dry weather and partly cloudy skies.  Mixing heights will be suppressed and transport winds will be mostly light and variable.
    EXTENDED OUTLOOK (WEDNESDAY - FRIDAY)
*** Marginal or Occasionally Poor Ventilation Conditions Through the Week ***
By Wednesday the upper high looses strength and drifts east.  Flow aloft backs to southwest.  Transport winds switch to southeast through east most areas.  Maximum mixing heights remain low and nighttime inversions will hold any residual smoke close to the ground.  The upper ridge re-strengthens on Thursday for continued low maximum mixing heights and unfavorable ventilation conditions.   An upper disturbance moving through on Friday will lift maximum mixing heights to more favorable levels.

2.  DISPERSION



TUESDAY



Zone 630 and 632:

Mixing height below 500 ft early rising to 1000 - 1800 ft by late morning.  Afternoon mixing height rises to 2600 - 3600 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to ENE to ESE at 5 - 9 mph during the afternoon and increases to E to SE at 9 - 15 mph during the evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NE to E at 4 - 8 mph during the afternoon then becomes light and variable during the evening.



Zone 633 - 638:

Mixing height below 500 ft early rising to 1000 - 2000 ft by late morning.  Afternoon mixing height rises to 2500 - 3500 ft then lowers below 1000 ft during the evening.



Transport wind SSW to WSW at 4 - 8 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon then increases to ESE to SSE at 8 - 14 mph during the evening.



Surface wind light and variable and controlled by local terrain.  Surface wind increases to ESE to SSE at 4 - 8 mph during the evening.



OUTLOOK:



WEDNESDAY

In the west mixing height 1800 to 2800 ft throughout the day.  In the east mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning lowering below 1000 ft during the afternoon.  Transport wind SE to S at 10 - 18 mph during the morning becoming SE to SSW at 6 - 10 mph during the afternoon.  Surface wind ESE to S at 6 - 10 mph during the morning becoming light and variable during the afternoon.



THURSDAY

Mixing height below 1000 ft during the morning rising to 1400 to 2400 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



FRIDAY

Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 4500 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, November 2, 2010.

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



Zone 630 and 632:

Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles in all directions of SSRAs.  Complete ignitions by 3:00pm.



Zone 633 - 638:

Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles in all directions of SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:00pm.



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

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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