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: Monday, May 24, 2010       2:35 PM      Jim Little

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

    TUESDAY

An upper level low remains about 6000 miles west of Vancouver Island on Tuesday.  Counter clockwise flow around that low drives a Pacific weather system mainly into northern California but enough moisture spreads northward for scattered showers throughout the region.  Mixing heights will be high enough for good smoke dispersal conditions.  Transport winds will be generally south to southeast.

    OUTLOOK (WEDNESDAY-FRIDAY)

The upper low elongates on a NW/SE axis but remains offshore on Wednesday.   Upper flow will be from the south or southeast across Oregon.  There will be enough moisture for scattered showers.  By Thursday the upper low consolidates off the southwest Oregon coast.  Moisture continues to stream around the low and spread south to north across the region.  The low finally drifts east and a drier northerly flow sets up across the region.  Expect dry weather, and with some sunshine, warmer temperatures.  Smoke dispersal conditions should remain fair to good throughout the outlook period.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 3400 - 4400 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2600 - 3600 ft during the evening.

Transport wind SSE to SSW at 12 - 22 mph.

Surface wind SSE to SSW at 9 - 15 mph throughout the day.

Zone 633 - 638:
Mixing height near or above 5000 ft throughout the day.

Transport wind SE to S at 12 - 22 mph during the morning.  Transport wind decreases to SSE to SSW at 10 - 16 mph during the afternoon and evening.

Surface wind SE to S at 10 - 18 mph during the morning.  Surface wind decreases to SE to SSW at 6 - 12 mph during the afternoon and evening.

OUTLOOK:

WEDNESDAY
In the west mixing height 2400 to 3400 ft during the morning rising above 5000 ft during the afternoon.  In the east mixing height 3400 to 4400 ft during the morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 9 - 17 mph during the morning becoming light and variable during the afternoon.  Surface wind S to SW at 6 - 12 mph during the morning becoming light and variable during the afternoon.

THURSDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 8 - 12 mph during the morning becoming WSW to WNW at 10 - 20 mph during the afternoon.  Surface wind WSW to WNW at 5 - 9 mph during the morning becoming WSW to WNW at 9 - 15 mph during the afternoon.

FRIDAY
Mixing height 2200 to 3200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to NNW at 12 - 24 mph during the morning becoming NW to NNW at 18 - 30 mph during the afternoon.  Surface wind NW to NNW at 10 - 20 mph.

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, May 25, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the SSE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSE through SW in or near drainages leading to SSRAs.

Zone 633 - 638:
Avoid ignitions within 10 miles to the SE through SSW of 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/20100524/46dcd85a/attachment.html>