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: Saturday, May 29, 2010       2:35 PM      Pete Parsons



NOTE:  IN HONOR OF MEMORIAL DAY, THE SMOKE MANAGEMENT WEATHER OFFICE WILL BE CLOSED ON SUNDAY, MAY 30th, AND NO FORECASTS/INSTRUCTIONS WILL BE ISSUED. NORMAL WEATHER OPERATIONS WILL RESUME ON MONDAY, MAY 31ST.



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


    SUNDAY

A weak and transitory upper-level ridge will bring partly cloudy and dry conditions.  Maximum temperatures will recover to near normal with fair to good afternoon smoke dispersal conditions.  As the ridge shifts east late, a weak weather system, in a westerly flow aloft, will bring increasing clouds.

    OUTLOOK (MONDAY-WEDNESDAY)

Skies will be with mostly cloudy Monday with scattered showers, mainly in zones 633-638.  Temperatures will be slightly cooler than on Sunday, but daytime heating may combine with cooling aloft to produce a few afternoon thunderstorms.  On Tuesday, a flat and transitory upper-level ridge will turn the flow aloft northwesterly with some drying and stabilizing of the air mass.  Temperatures will likely remain slightly below normal under partly cloudy skies with just a slight chance of a shower.  Westerly flow aloft will drive a Pacific frontal system into Washington and northern Oregon Wednesday.  Skies will turn mostly cloudy with slightly cooler temperatures and a chance of showers.  Smoke dispersal conditions should be fair to good during the period, although transport winds will be light on Tuesday.


2.  DISPERSION



SUNDAY

Mixing height below 1500 ft early rising to 3500 - 4500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1000 - 2000 ft during the evening.



Transport wind SSW to WSW at 4 - 8 mph during the morning and afternoon.  Transport wind becomes light and variable and controlled by local terrain during the evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WSW to NW at 4 - 8 mph during the afternoon then becomes light and variable during the evening.



OUTLOOK:



MONDAY

Mixing height 2300 to 3300 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SW to WSW at 8 - 14 mph during the morning becoming WSW to WNW at 8 - 12 mph during the afternoon.  Surface wind SSW to W at 5 - 7 mph during the morning becoming WNW to NNW at 5 - 9 mph during the afternoon.



TUESDAY

Mixing height 2200 to 3200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WSW to WNW at 4 - 8 mph during the afternoon.  Surface wind light and variable during the morning becoming W to NW at 4 - 8 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind SSW to WSW at 10 - 20 mph.  Surface wind S to SW at 6 - 10 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 Sunday, May 30, 2010.

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



Avoid ignitions within 12 miles to the SSW through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSW through WNW in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.



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

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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