MCIR <3> 3
FPCN39 CWLW 231347
SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR INCLUDING THE
NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF
ENVIRONMENT CANADA AT 7:00 AM PST TUESDAY 23 FEBRUARY 1999 FOR TODAY.
 
 VENTILATION INDICES (TEMPERATURE) AND MIXING HEIGHTS.
 MIXING HEIGHTS IN METRES ABOVE SEA LEVEL.
 AVERAGE WINDS IN KNOTS.
  
  SPOT INDICES ARE DETERMINED BY THE ASPECT AND ELEVATION OF THE SITES.
  COMPARE WINDS, TEMPERATURES AND ELEVATION WITH THE SITES HERE
  TO DETERMINE THE INDEX IN ANY OTHER AREA.
   
   SOUTHERN INTERIOR
	
   UPPER      ***** MORNING ******    ***** AFTERNOON ****
	AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
			   (mASL)  (kt)            (mASL)  (kt)
   FRSR CANYN   KEL      80    5     200  18     80    8    2350  19
   KAMLOOPS     KEL      87    5     950   8     60    9    2700   9
   OKANAGAN     KEL      33    4     500   8     60    8    2550  10
   CASTLEGAR    SPOK      9    2     500   8     56    5    2250   9
   CRANBROOK    SPOK     10    0     950   8     60    4    2050   8
   REVELSTOKE   KEL       9    2     450   8     75    4    2200   8
															
   *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
	HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
															 
    FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
				  900m     1800m    2700m
    PENTICTON    W   11   W   24   W   43
    CRANBROOK             W   19   W   48
																		   
    TODAY'S VENTING: GOOD.
																			
    VENTING FOR WEDNESDAY: FAIR.
																			 
																			  
																			   
																				
	CENTRAL INTERIOR/NORTHEAST
																				 
	UPPER      ***** MORNING ******    ***** AFTERNOON ****
	AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
																																		(mASL)  (kt)            (mASL)  (kt)
																																		WILLIAMS L   P.G.     70    0    2350   8     80    4    3950  10
																																		PR. GEORGE   P.G.     70    2    2100   8     80    5    3700  10
																																		SMITHERS     P.G.     60    0    2500   6     80    4    2300  10
																																		WELLS GRAY   P.G.     70    2    2100   8     80    4    4000  10
																																		FT NLSN      F.N.     31   -6     700   8     37   -5     750   8
																																		FT STJOHN    F.N.     64    0    1250  12     89    3    1800  15
																																		 
																																		 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
																																		 HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
																																		  
																																		  FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
																																					   900m     1800m    2700m
																																					   PR. GEORGE            W   35   W   50
																																					   SMITHERS              SW  28   SW  50
																																						
																																						TODAY'S VENTING:  GOOD EXCEPT FAIR FORT NELSON REGION.
																																						 
																																						 VENTING FOR WEDNESDAY: FAIR.
																																						  
																																						   
																																							
																																							 
																																							 COAST
																																							  
																																	 UPPER      ***** MORNING ******    ***** AFTERNOON ****
																																	  AIR      VI  Tmp  MXG HT  Wnd    VI  Tmp  MXG HT  Wnd
																																					 (mASL)  (kt)            (mASL)  (kt)
																																	 VANCOUVER    QUIL     62    6     550   8     80    9    1550  10
																																	 FRASER VLY   QUIL     59    6     500   8     80    9    1450  10
																																	 SRN VRISL    QUIL     48    6     400  10     80    9    1350  10
																																	 CNTRL VRISL  QUIL      9    4      50   7     80    8    1150  10
																																	 NRN VRISL    HRDY     27    4     250   8     80    6    1050  10
																																	 TERRACE      ANT      10    2     200  10     82    3    1250  10
																																	 STEWART      ANT      10    2     200  10     80    3    1220  10
																																																					  
  																																  *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
																																  HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
																																																					   
																																	   FORECAST UPPER WINDS FOR TUESDAY AFTERNOON (WINDS IN KM/H):
	  																																			900m     1800m    2700m
																																		VANCOUVER    S   17   SW  22   W   30
																																		PORT HARDY   S   31   S   39   SW  37
																																		SANDSPIT     S   41   S   41   S   37
																												 
																																				 TODAY'S VENTING: GOOD.
																																																									  
																																				  VENTING FOR WEDNESDAY: GOOD.
																																																									   
																																																										
																																																										 
																																																										  
																																				  VENTILATION GUIDELINES:
																																		0-33.....POOR
																																		  34-54.....FAIR
																																			55-100.....GOOD.
																																																																		VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
																																																																		 
																																																																		  
																																																																		  END/JMS