SMI Northeast (Smoke Management Instructions) (no subject)

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Mon Nov 29 14:29:27 PST 2010


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Monday, November 29, 2010       2:35 PM      Jim Little



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


    TUESDAY
The upper ridge that was over the region Monday moves east on Tuesday leaving southwesterly flow aloft over the Pacific Northwest.  A Pacific front will move in from the west.  Cooler air remains over the NE mountains for snow levels at about 3000 feet but southerly flow ahead of the front will bring in warmer air for north central Oregon and snow levels of around 5000 feet.  Maximum mixing heights should be quite high for fair to good smoke dispersal conditions.
    EXTENDED OUTLOOK (WEDNESDAY - FRIDAY)
Upper flow over the region will be generally west-southwest through the outlook period.  On Wednesday the atmosphere stabilizes for drier conditions.  Maximum mixing heights are suppressed somewhat for mostly fair smoke dispersal conditions.  Tuesday's front is reenergized a bit on Thursday and drifts northward for some periods of light rain, then moves east for dry weather again on Friday.  Ventilation conditions will be generally fair Thursday and Friday.



2.  DISPERSION



TUESDAY



Zone 630 and 632:

Mixing height 3500 - 4500 ft during the morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 3000 - 4000 ft during the evening.



Transport wind SSW to SW at 23 - 41 mph during the morning.  Transport wind decreases to SSW to SW at 20 - 36 mph during the afternoon and evening.



Surface wind S to SSW at 13 - 25 mph throughout the day.

Zone 633 - 638:

Mixing height 2900 - 3900 ft during the morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 3000 - 4000 ft during the evening.



Transport wind SSE to SSW at 15 - 25 mph throughout the day.



Surface wind SSE to SSW at 10 - 20 mph.



OUTLOOK:



WEDNESDAY

Mixing height 2200 to 3200 ft during the morning rising to 3000 to 4000 ft during the afternoon.  Transport wind SSW to WSW at 10 - 16 mph during the morning becoming SSE to SSW at 8 - 14 mph during the afternoon.  Surface wind S to SW at 6 - 10 mph.



THURSDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



FRIDAY

Mixing height below 1000 ft during the morning rising to 3000 to 4000 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 Tuesday, November 30, 2010.

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



Zone 630 and 632:

Avoid ignitions within 10 miles to the SSW through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the SSW through WSW 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 SSE through SSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the SSE through WSW in or near drainages leading to SSRAs.  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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listsmart.osl.state.or.us/pipermail/smi_northeast/attachments/20101129/6d553668/attachment.html>


More information about the SMI_Northeast mailing list