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: Thursday, June 3, 2010       2:35 PM      Pete Parsons



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



    FRIDAY


An unseasonably strong westerly jet stream will direct another potent Pacific storm across Oregon.  Moderate to locally heavy morning rain will give way to afternoon showers and a chance of thunderstorms.  A surface low-pressure system is forecast to track across extreme northwestern Oregon and western Washington in the early morning and then rapidly move into northeastern Washington in the afternoon.  It is not forecast to be a real strong low-pressure system, but the forecast track is favorable to bring brisk southwesterly winds to the region in the afternoon.  Clouds and rain will keep temperatures well below normal, but the snow level is expected to stay above 6000 feet.  High mixing heights and strong transport winds will make for good smoke dispersal conditions.

    OUTLOOK (SATURDAY-MONDAY)


Saturday will be a break between storms, but the strong westerly jet stream will direct a weaker weather system across mainly the northern half of the state Sunday.  Some drying is expected again on Monday with temperatures moderating to near normal.  Daytime smoke dispersal conditions should be fair to good during the period, although transport winds will be light on Saturday.  The long-range computer models show wet conditions possibly returning later next week.



2.  DISPERSION



FRIDAY



Zone 630 and 632:

Mixing height above 5000 ft throughout the day.  Mixing height lowers to 1900 - 2900 ft during the evening.



Transport wind SSW to SW at 22 - 38 mph during the morning.  Transport wind decreases to WSW to W at 14 - 28 mph during the afternoon and decreases to WSW to WNW at 9 - 15 mph during the evening.



Surface wind SW to WSW at 15 - 25 mph during the morning.  Surface wind decreases to WSW to WNW at 10 - 20 mph during the afternoon and decreases to W to NW at 6 - 12 mph during the evening.



Zone 633 - 638:

Mixing height above 5000 ft throughout the day.  Mixing height lowers to 1300 - 2300 ft during the evening.



Transport wind SSW to SW at 22 - 38 mph during the morning.  Transport wind shifts to WSW to WNW and decreases to 15 - 29 mph during the afternoon then decreases to WNW to NNW at 9 - 15 mph during the evening.



Surface wind SW to WSW at 15 - 25 mph during the morning.  Surface wind decreases to WSW to WNW at 10 - 20 mph during the afternoon and decreases to WNW to NNW at 5 - 9 mph during the evening.



OUTLOOK:



SATURDAY

Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



SUNDAY

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 10 - 20 mph.  Surface wind S to SW at 6 - 10 mph during the morning becoming WSW to WNW at 10 - 20 mph during the afternoon.



MONDAY

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 during the morning becoming WNW to NNW at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N 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 Friday, June 4, 2010.

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



Zone 630 and 632:

Avoid ignitions within 10 miles to the SSW through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the SE 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.



Zone 633 - 638:

Avoid ignitions within 12 miles to the SSW through NW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSW through NW 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.  Complete ignitions by 5 p.m.



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

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

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