SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Tuesday, June 1, 2010       2:35 PM      Jim Little

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

    WEDNESDAY

An upper level low remains in the Gulf of Alaska approximately 600 miles west of the Queen Charlotte Islands.  Winds aloft over the Pacific Northwest will be from the west southwest and drive a Pacific weather front through the region during the day.  Rain will spread into the region early and continue throughout the day.  Warm air streaming northward in advance of the front will suppress mixing heights a bit for just fair smoke dispersal conditions.

    OUTLOOK (THURSDAY-SATURDAY)

The upper low will be in about the same position on Thursday but the region will be between weather systems for mostly cloudy skies but only widely scattered showers.  Cooler air aloft will push afternoon mixing heights well above 5000 feet for good smoke dispersal conditions. Another active Pacific weather system will move across the Northwest on Friday bringing clouds and significant rain to the area.  The rain will taper off Friday night and by Saturday weak surface high pressure builds to the north for drying and warmer temperatures.  Smoke dispersal conditions will be good to excellent Thursday and Friday, but light and variable winds will limit smoke movement on Saturday.

2.  DISPERSION

WEDNESDAY

Zone 630 and 632:
Mixing height 2500 - 3500 ft during the morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 1400 - 2400 ft during the evening.

Transport wind S to SW at 20 - 34 mph during the morning.  Transport wind decreases to SSW to SW at 12 - 24 mph during the afternoon then shifts to W to WNW at 12 - 22 mph during the evening.

Surface wind S to SSW at 12 - 24 mph during the morning.  Surface wind decreases to SSW to WSW at 8 - 12 mph during the afternoon then shifts to WSW to WNW at 8 - 12 mph during the evening.

Zone 633 - 638:
Mixing height 3100 - 4100 ft during the morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 2500 - 3500 ft during the evening.

Transport wind SSW to SW at 12 - 22 mph during the morning and afternoon.  Transport wind decreases to S to SW at 10 - 18 mph during the evening.

Surface wind S to SW at 10 - 16 mph during the morning and afternoon.  Surface wind decreases to S to SW at 6 - 10 mph during the evening.

OUTLOOK:

THURSDAY
In the west mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  In the east mixing height 3100 to 4100 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 6 - 10 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

FRIDAY
Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to SW at 18 - 32 mph during the morning becoming WSW to WNW at 10 - 18 mph during the afternoon.  Surface wind SSW to SW at 12 - 24 mph during the morning becoming WSW to WNW at 9 - 15 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising above 5000 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 Wednesday, June 2, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 15 miles to the S through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 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.  Watch for shifting transport winds.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4:00pm.

Zone 633 - 638:
Avoid ignitions within 12 miles to the S through SW 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.  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: <https://omls.oregon.gov/pipermail/smi_northeast/attachments/20100601/76bb1d5b/attachment.html>