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, May 10, 2011       2:35 PM      Jim Little



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



    WEDNESDAY



The upper ridge that brought sunshine to much of the state Tuesday moves east on Wednesday.  In the meantime an upper level low off the west coast of North America becomes the major factor in Pacific Northwest Weather.  A Pacific cold front will move into western Oregon, but the only effect will for northeast Oregon during the day will be increasing clouds.  Maximum mixing heights will be high and transport winds will be generally south-southwesterly.



    OUTLOOK (THURSDAY - SATURDAY)



The upper low is centered about 300 miles west of Vancouver Island Thursday morning drifting slowly southward.  There should be some areas of light rain with the remains of the front.  Temperatures will tumble about 12 degrees from Wednesday's readings.  With cool air aloft mixing heights should be quite high and transport winds will be brisk southerly or southwesterly most areas for good smoke dispersal conditions.



The upper low moves to about 500 miles west of the mouth of the Columbia River by Friday.  Upper level flow will be southerly over the region and with the low so far away expect dry weather. Mixing heights should stay high and transport winds will be southerly.



By Saturday the low aloft will be about 350 miles west of Brookings but slowly rotating toward northern California.  This will bring an increasing chance of rain to the area.  Maximum mixing heights will be high, and transport winds will be generally southerly.





2.  DISPERSION



WEDNESDAY



Zone 630 and 632:

Mixing height 3800 - 4800 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1500 - 2500 ft during the evening.



Transport wind S to SW at 10 - 18 mph throughout the morning and afternoon.  Transport wind shifts to NW to NNW at 10 - 22 mph during the evening.



Surface wind S to SW at 9 - 15 mph throughout the morning and afternoon.  Surface wind shifts to NW to N at 9 - 15 mph during the evening.

Zone 633 - 638:

Mixing height above 5000 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.



Transport wind S to SSW at 8 - 12 mph during the morning.  Transport wind increases to S to SW at 10 - 18 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.



Surface wind S to SSW at 8 - 12 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.



OUTLOOK:



THURSDAY

Mixing height below 1000 ft early rising to 3800 to 4800 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NNW to NNE at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming NNW to NNE at 6 - 10 mph during the afternoon.



FRIDAY

Mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming SE to SSW at 4 - 8 mph during the afternoon.  Surface wind light and variable during the morning becoming SE to SSW at 4 - 8 mph during the afternoon.



SATURDAY

Mixing height below 1000 ft early rising to 2800 to 3800 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming SE to SSW at 4 - 8 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, May 11, 2011.

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



Zone 630 and 632:

Avoid ignitions within 10 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles in all directions of SSRAs.  Watch for shifting transport winds.



Zone 633 - 638:

Avoid ignitions within 12 miles to the SSE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_northeast/attachments/20110510/0fdf05da/attachment.html>