SMI Northeast (Smoke Management Instructions) Corrected Zone 630 and 632 mixing heights

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Tuesday, November 2, 2010       2:35 PM      Jim Little



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


    WEDNESDAY
*** Marginal Smoke Dispersal Conditions ***
Upper air charts show a broad ridge with its axis stretching from Arizona northward to Alberta and a broad trough in the Gulf of Alaska and the eastern Pacific about 900 miles west of the coast.  Upper flow over Oregon is southwesterly.  Temperatures aloft will be much warmer than average for this time of year.  The warm air aloft will make the atmosphere very stable for unfavorable smoke dispersal conditions.  Transport winds will be generally from southeast and light, while mixing heights will be quite low.
    EXTENDED OUTLOOK (WEDNESDAY - FRIDAY)
*** Marginal Ventilation Continues Thursday ***
The upper level pattern slowly shifts east with little improvement for Thursday.  By Friday the upper trough approaches from the west and temperatures aloft will be much cooler helping to improve ventilation.  Smoke dispersal conditions become good with a brisk south or south-southwesterly transport wind developing.  The initial weather system will likely not produce rain on Friday, but more moisture moves into the Pacific Northwest for some rain likely Saturday.

2.  DISPERSION



WEDNESDAY



Zone 630 and 632:



Mixing height 1500 - 2500 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.



Transport wind SSE to SSW at 10 - 16 mph during the morning and afternoon.  Transport wind increases to S to SSW at 10 - 22 mph during the evening.



Surface wind SE to SSW at 6 - 10 mph throughout the day.





Zone 633 - 638:

Mixing height 1500 - 2500 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.



Transport wind SE to SSE at 10 - 22 mph during the morning.  Transport wind decreases to SE to S at 8 - 14 mph during the afternoon and evening.



Surface wind SE to S at 9 - 15 mph during the morning.  Surface wind decreases to ESE to S at 6 - 10 mph during the afternoon and evening.



OUTLOOK:



THURSDAY

Mixing height 1200 to 2200 ft throughout the day.  Transport wind SSE to SSW at 6 - 12 mph during the morning becoming SSE to SSW at 10 - 18 mph during the afternoon.  Surface wind SE to SSW at 4 - 8 mph.



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.



SATURDAY

Mixing height below 1000 ft early rising to 3100 to 4100 ft by late morning rising to 4000 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 Wednesday, November 3, 2010.

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



Zone 630 and 632:

Avoid ignitions within 15 miles to the SE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SE through SW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  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 to the ESE through SSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the ESE through SSW in or near drainages leading to 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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_northeast/attachments/20101102/f76ed1f2/attachment.html>