SMI Northeast (Smoke Management Instructions) (no subject)

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Tue Nov 16 14:13:48 PST 2010


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Tuesday, November 16, 2010       2:35 PM      Jim Little



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


    WEDNESDAY
A deep upper level low near the Queen Charlotte Islands supports a strong Pacific front on Wednesday.  This front will move into Washington then drop southward into extreme northwestern Oregon by early afternoon.   Clouds will be on the increase ahead of the front but precipitation will hold off until Thursday.   Transport winds will be generally south-southwesterly and mixing heights high enough for fair smoke dispersal conditions.
    EXTENDED OUTLOOK (THURSDAY - SATURDAY)
The upper low moves to about 150 miles west of Forks, Washington on Thursday.  Expect light rain as the remains of the front move through the region.  Transport winds will be mostly light and variable and smoke dispersal conditions will be good.  On Friday the upper low weakens but a deep cool trough remains just offshore and a surface low continues to spin off the Washington coast. Areas of light precipitation will persist and smoke dispersal conditions will remain good.  On Saturday atmospheric models show a new upper level low dropping into the offshore trough with the low center about 200 miles west of Waldport.  There will be limited moisture for a few showers and maximum mixing heights should top 5000 feet.





2.  DISPERSION



WEDNESDAY



Zone 630 and 632:

Mixing height 1900 - 2900 ft during the morning.  Afternoon and evening mixing rises to 3300 - 4300 ft.



Transport wind SSW to WSW at 20 - 34 mph during the morning.  Transport wind increases to SW to WSW at 24 - 42 mph during the afternoon and evening.



Surface wind SSW to SW at 10 - 20 mph during the morning.  Surface wind increases to SW to WSW at 15 - 25 mph during the afternoon and evening.

Zone 633 - 638:



Transport wind S to SSW at 16 - 30 mph throughout the day.



Surface wind SSE to SSW at 12 - 22 mph.





OUTLOOK:



THURSDAY

In the west mixing height 2900 to 3900 ft during the morning rising above 5000 ft during the afternoon.  In the east mixing height 3900 to 4900 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 12 - 24 mph during the morning becoming SW to W at 10 - 16 mph during the afternoon.  Surface wind WSW to WNW at 10 - 16 mph during the morning becoming SW to WNW at 6 - 10 mph during the afternoon.



FRIDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSE to SSW at 4 - 8 mph.  Surface wind SW to W at 4 - 8 mph.



SATURDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SE to SSW at 8 - 12 mph.  Surface wind SE to SSW at 4 - 8 mph.



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 17, 2010.

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



Zone 630 and 632:

Avoid ignitions within 12 miles to the SW through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the SW through WNW in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.



Zone 633 - 638:

Avoid ignitions within 12 miles to the S through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the S through WNW in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.



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

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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