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: Sunday, October 24, 2010       2:35 PM      Jim Little



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


    MONDAY
A 180 mph jet stream remains aimed directly at Oregon on Monday.  Sunday's wet and windy storm will be well to the east of the region, but showers and possible thunderstorms will linger.  Cool air aloft will allow for high mixing heights and good smoke dispersal conditions most areas.  Snow level will be about 5000 feet.
    EXTENDED OUTLOOK (TUESDAY - THURSDAY)
The upper level jet slackens and drops southward while weak high pressure aloft begins to build over the eastern Pacific on Wednesday.  There will still be a few scattered showers.  Mixing heights will remain high most areas.   By Wednesday the upper level ridge moves over the Pacific Northwest and an upper low develops about 450 miles west of the Washington Coast.  Low level flow goes south or south-southeasterly.  Subsidence aloft (sinking air motion) suppresses maximum mixing heights but smoke dispersal conditions will remain fair to good most areas.  On Thursday the center of the upper low moves to within about 250 miles of the northern Oregon Coast.  Upper flow becomes southwesterly over the region.  A Pacific weather system moves into Washington and Oregon during the day.  Rain spreads in from the southwest by afternoon.



2.  DISPERSION



MONDAY



Zone 630 and 632:

Mixing height 3600 - 4600 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2400 - 3400 ft during the evening.



Transport wind SW to W at 14 - 28 mph.



Surface wind SW to W at 10 - 20 mph during the morning and afternoon.  Surface wind decreases to SW to W at 8 - 14 mph during the evening.



Zone 633 - 638:

Mixing height 2700 - 3700 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 3500 - 4500 ft during the evening.



Transport wind WSW to W at 16 - 30 mph throughout the day.



Surface wind WSW to W at 12 - 24 mph.



OUTLOOK:



TUESDAY

Mixing height 2100 to 3100 ft during the morning rising to 4000 to 5000 ft during the afternoon.  Transport wind SW to W at 10 - 20 mph during the morning becoming W to NW at 10 - 20 mph during the afternoon.  Surface wind SW to W at 8 - 12 mph during the morning becoming W to NW at 8 - 12 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable during the morning becoming SE to S at 6 - 10 mph during the afternoon.  Surface wind light and variable.



THURSDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 3500 to 4500 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 Monday, October 25, 2010.

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



Zone 630 and 632:

Avoid ignitions within 10 miles to the SW through WNW of 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 WSW through W of 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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