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: Wednesday, June 2, 2010       2:35 PM      Jim Little

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

    THURSDAY

An upper level low continues in the Gulf of Alaska producing a west-southwest flow over the Pacific Northwest.  The flow is quite strong, especially for the time of year, with a 125mph plus jet stream cutting across the area at about 30,000 feet.  However, during the day on Thursday the area will be between weather systems and while it will be generally dry I can't rule out a few widely scattered showers. Mixing heights will be high enough to provide good smoke dispersal conditions once morning inversions break.

    OUTLOOK (FRIDAY-SUNDAY)

The heavy rain continues into Friday morning then slowly turns to showers and decreases.  Mixing heights will provide fair to good smoke dispersal conditions.  On Saturday surface high pressure begins to build but showers will continue, slowly decreasing during the day.  At this point Sunday looks like a mostly dry day with partly cloudy skies.  Mixing heights both Saturday and Sunday will be near or above 5000 feet for good smoke dispersal conditions.

2.  DISPERSION

THURSDAY

Zone 630 and 632:
Mixing height 3900 - 4900 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

Zone 633 - 638:
Mixing height 2700 - 3700 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.

Transport wind SW to W at 5 - 9 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon and evening.

Surface wind SW to W at 4 - 8 mph during the morning.  Surface wind becomes light and variable and controlled by local terrain during the afternoon and evening.

OUTLOOK:

FRIDAY
Mixing height above 5000 ft during the morning lowering to 4000 to 5000 ft during the afternoon.  In the west transport wind SW to SW at 24 - 42 mph during the morning becoming WSW to WNW at 20 - 34 mph during the afternoon.  In the east transport wind SSW to SW at 18 - 30 mph during the morning becoming W to WNW at 13 - 25 mph during the afternoon.  Surface wind SSW to SW at 13 - 25 mph during the morning becoming WSW to WNW at 12 - 24 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SUNDAY
Mixing height below 1000 ft early rising to 1500 to 2500 ft by late morning rising to 4500 to 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 Thursday, June 3, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles in all directions of SSRAs.  No additional restrictions necessary.  Complete ignitions by 4:00pm.

Zone 633 - 638:
Avoid ignitions within 15 miles in all directions of SSRAs.  Complete ignitions by 4:00pm.

    =========================================================
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/20100602/8c81b355/attachment.html>