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, November 17, 2010       2:35 PM      Pete Parsons



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



THURSDAY



A vigorous cold front will bring rain, snow, and blustery winds to the region in the morning with the snow level around 4000 feet.  In the wake of the front, winds will taper off and steady precipitation will turn to showers by afternoon.  A very cold upper-level trough will drop southward along the British Columbia coastline, to just off the Pacific Northwest coast, with strong westerly flow aloft developing over Oregon and maintaining some shower activity, especially over western facing mountain slopes.  Snow levels will rapidly drop to near 2500 feet by evening.  Expect good smoke dispersal conditions.


OUTLOOK (FRIDAY-SUNDAY)

A very cold upper-level trough will remain over the region during the outlook period with generally fair to good smoke dispersal conditions.



A surface low-pressure center will slowly sag southward, to just off the central Oregon coast, on Friday, with southwesterly transport winds.  Little change in the overall pattern is forecast for Saturday and Sunday.  Snow levels will drop to between 1500 and 2500 feet with showers, mainly over higher terrain.  Transport winds will likely maintain a southerly component through Saturday and turn more westerly by Sunday.



2.  DISPERSION



THURSDAY

Mixing height above 5000 ft throughout the day.  Mixing height lowers to 1800 - 2800 ft during the evening.



Transport wind WSW to WNW at 14 - 24 mph during the morning and afternoon.  Transport wind decreases to WSW to WNW at 8 - 16 mph during the evening.



Surface wind WSW to WNW at 7 - 11 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.



OUTLOOK:



FRIDAY

In the west mixing height 2200 to 3200 ft during the morning rising above 5000 ft during the afternoon.  In the east mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSW to WSW at 7 - 11 mph.  Surface wind light and variable.



SATURDAY

Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 8 - 12 mph.  Surface wind SSE to SSW at 4 - 8 mph.



SUNDAY

Mixing height 2000 to 3000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 4 - 8 mph during the morning becoming W to NW at 10 - 20 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 4 - 8 mph during the afternoon.



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, November 18, 2010.

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



Avoid ignitions within 10 miles to the WSW through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the SSW through WNW in or near drainages leading to SSRAs.



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

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/20101117/fdd33fad/attachment.html>