SMI South Central (Smoke Management Instructions) (no subject)

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Tuesday, November 16, 2010       2:40 PM      Jim Little



1.  DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625


    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

Mixing height below 1000 ft during the morning.  Afternoon mixing height rises to 2700 - 3700 ft and rises to 3200 - 4200 ft during the evening.



Transport wind SW to WSW at 20 - 34 mph during the morning.  Transport wind increases to SW to WSW at 24 - 42 mph during the afternoon and increases to SW to WSW at 29 - 49 mph during the evening.



Surface wind SSW to SW at 10 - 18 mph during the morning.  Surface wind increases to SW to WSW at 13 - 25 mph during the afternoon and evening.



OUTLOOK:



THURSDAY

Mixing height 2700 - 3700 ft during the morning and through the afternoon.  Transport wind SW to WSW at 32 - 52 mph during the morning becoming SW to WSW at 16 - 30 mph during the afternoon.  Surface wind SW to WSW at 18 - 32 mph during the morning becoming SW to WSW at 10 - 18 mph during the afternoon.



FRIDAY

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning rising to 3500 - 4500 ft during the afternoon.  Transport wind SSW to WSW at 8 - 12 mph.  Surface wind SSW to WSW at 4 - 8 mph.



SATURDAY

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning rising to 4500 - 5000 ft during the afternoon.  Transport wind WSW to WNW at 8 - 12 mph during the morning becoming SSE to SSW at 8 - 12 mph during the afternoon.  Surface wind SW to WNW at 4 - 8 mph during the morning becoming SSE to SW at 4 - 8 mph during the afternoon.



3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER

    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Wednesday, November 17, 2010.

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Avoid ignitions within 12 miles to the SW through WSW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.



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4.  SPECIAL NOTE:



    The smoke management forecaster is available at (503)

    945-7401.  The smoke management forecaster is available

    to discuss specific burns.  The duty forecaster phone

    number is (503) 945-7401. Please call this number and

    not individual's numbers to discuss daily burning. Please

    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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