FNUS75 KBOU 030337 FWSBOU SPOT FORECAST FOR EVERGREEN 6B...USFS NATIONAL WEATHER SERVICE DENVER CO 829 PM MST WED DEC 2 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...THE PASSAGE OF A WEAK COLD FRONT AND UPPER LEVEL LOW PRESSURE TROUGH WILL RESULT IN SEVERAL HOURS OF UPSLOPE SNOWFALL IN AND ALONG THE FRONT RANGE LATE TONIGHT AND THURSDAY MORNING. LIGHT ACCUMULATIONS ARE ANTICIPATED MAINLY IN AND NEAR THE FOOTHILLS SOUTH OF THE BOULDER-LARIMER COUNTY LINE. SLOW IMPROVEMENT IS ANTICIPATED THURSDAY AFTERNOON WITH THIS WEATHER SYSTEM EXITING THE AREA. SKIES ARE EXPECTED TO BECOME MOSTLY CLEAR TO PARTLY CLOUDY THURSDAY NIGHT ALLOWING FOR STRONG RADIATIONAL COOLING TO SEND TEMPERATURES BELOW ZERO IN THE BURN AREA. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY WITH A SLIGHT CHANCE OF SNOW UNTIL 2300. THEN CLOUDY WITH SNOW LIKELY. MIN TEMPERATURE.....2 TO 7. MAX HUMIDITY........80%. 20-FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 2-8 MPH. TRANSPORT WINDS.....NORTHWEST 4-8 MPH. MIXING HEIGHT.......LOWERING TO 1200-1800 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .THURSDAY... SKY/WEATHER.........CLOUDY WITH SNOW LIKELY UNTIL 1100...THEN BECOMING MOSTLY CLOUDY IN THE AFTERNOON WITH A CHANCE OF SNOW. MAX TEMPERATURE.....13-17. MIN HUMIDITY........54%. 20-FOOT WINDS.......UPSLOPE/UPVALLEY 4-10 MPH. TRANSPORT WINDS.....NORTHWEST 5-16 MPH. MIXING HEIGHT.......RISING TO 4600-5300 FT AGL BY 1700. SMOKE DISPERSAL.....POOR UNTIL 1000...THEN FAIR UNTIL 1300...THEN GOOD. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .THURSDAY NIGHT... SKY/WEATHER.........MOSTLY CLOUDY UNTIL 2100...THEN PARTLY CLOUDY(30-40%). SLIGHT CHANCE OF SNOW UNTIL 2100. MIN TEMPERATURE.....-6 TO 2. MAX HUMIDITY........76%. 20-FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 2-8 MPH UNTIL 2400...THEN WEST 9-15 MPH. TRANSPORT WINDS.....NORTHWEST 5-12 MPH. MIXING HEIGHT.......2200-3200 FT AGL UNTIL 2100...THEN 600-1600 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .FRIDAY... SKY/WEATHER.........PARTLY CLOUDY(50-60%) UNTIL 1200...THEN MOSTLY CLOUDY. MAX TEMPERATURE.....27. MIN HUMIDITY........24%. 20-FOOT WINDS.......WEST 10-16 MPH. GUSTS UP TO 25 MPH IN THE AFTERNOON. TRANSPORT WINDS.....NORTHWEST 12-20 MPH UNTIL 1200...THEN 24-28 MPH. MIXING HEIGHT.......800-1800 FT AGL UNTIL 1000...THEN 4200-5200 FT AGL UNTIL 1600...THEN 1600-2600 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 1000...THEN FAIR UNTIL 1100...THEN VERY GOOD UNTIL 1500...THEN GOOD UNTIL 1700...THEN POOR. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .FORECAST DAYS 3 THROUGH 5... .SATURDAY...MOSTLY CLOUDY. LOWS AROUND 10. HIGHS IN THE LOWER 30S. WEST WINDS AROUND 13 MPH WITH GUSTS TO AROUND 35 MPH. .SUNDAY...CLOUDY. CHANCE OF SNOW AFTER 0600 UNTIL 1800...THEN SLIGHT CHANCE OF SNOW. LOWS AROUND 12. HIGHS IN THE MID 20S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .MONDAY...CLOUDY. SLIGHT CHANCE OF SNOW UNTIL 1800...THEN CHANCE OF SNOW. LOWS AROUND 11. HIGHS IN THE MID 20S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .TUESDAY...MOSTLY CLOUDY. CHANCE OF SNOW UNTIL 0600...THEN SLIGHT CHANCE OF SNOW. LOWS AROUND 14. HIGHS AROUND 30. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. EXPERIMENTAL FIRE WEATHER TABLE FOR EVERGREEN 6B. +++ DATA IN THE FOLLOWING TABLE HAS BEEN SAMPLED DIRECTLY FROM THE DIGITAL DATABASE. VALUES IN THE TABLE MAY NOT AGREE WITH INFORMATION IN THE NARRATIVE FORECAST. INFORMATION CONTAINED IN THIS TABLE SHOULD NOT BE CONSIDERED AN OFFICIAL FORECAST. PLEASE PROVIDE FEEDBACK IF THE INFORMATION IN THIS TABLE HAS BEEN REPRESENTATIVE AND/OR USEFUL. +++ FORECAST SC PP TF RH 20FT G H L 10K MIXG TRAN VENTL AJTV VALID AT % % F % WIND S I A WIND HGT WIND RATE RATNG MPH T L MPH AGL MPH KT-FT 12/02-20 67 22 10 73 E 6 6 2 1 W37 2799 W 9 21579 P 12/02-21 67 22 10 72 E 6 1 2725 W 8 18058 P 12/02-22 67 22 9 72 E 5 1 2651 W 6 14538 P 12/02-23 96 56 8 72 E 3 3 2 1 W32 2577 W 5 11017 P 12/03-00 96 56 7 75 E 3 1 2669 W 5 11111 P 12/03-01 96 56 5 78 NE 2 1 2761 NW 5 11205 P 12/03-02 96 56 4 80 NE 2 2 2 1 W33 2854 NW 5 11299 P 12/03-03 96 56 4 77 NE 2 1 2784 NW 5 10274 P 12/03-04 96 56 5 73 NE 2 1 2715 NW 3 9249 P 12/03-05 91 73 6 70 NE 2 2 2 1 W29 2645 N 3 8223 P 12/03-06 91 73 6 73 CALM 1 3003 NW 5 12157 P 12/03-07 91 73 5 77 CALM 1 3361 NW 6 16091 P 12/03-08 92 73 5 79 CALM 1 2 1 W23 3718 W 6 20025 P 12/03-09 92 73 7 74 CALM 1 4447 W 8 33775 P 12/03-10 92 73 10 67 SE 2 1 5176 W 10 47525 F 12/03-11 90 40 12 62 SE 3 3 2 1 NW22 5905 W 12 61275 G 12/03-12 90 40 14 58 E 3 1 6270 W 13 72792 G 12/03-13 90 40 14 56 NE 5 1 6635 W 15 84309 G 12/03-14 86 40 14 54 NE 5 5 2 1 NW23 6999 W 16 95825 G 12/03-15 86 40 14 54 NE 5 1 6429 W 15 84790 G 12/03-16 86 40 13 54 E 5 1 5858 NW 14 73755 G 12/03-17 77 30 12 55 E 3 3 2 1 N28 5287 NW 14 62719 G 12/03-18 77 30 8 73 SE 3 1 3102 NW 9 26227 P 12/03-19 77 30 7 76 S 5 1 2530 W 8 19714 P 12/03-20 77 30 6 75 SW 5 5 2 1 N25 1958 W 8 13202 P 12/03-21 77 30 3 75 SW 6 1 1609 W 8 11315 P 12/03-22 77 30 2 75 SW 6 1 1259 W 9 9429 P 12/03-23 56 7 2 74 SW 7 7 2 1 N23 910 W 9 7542 P 12/04-00 56 7 2 73 W 8 1 801 W 9 6764 P 12/04-01 56 7 1 72 W 9 1 693 W 10 5985 P 12/04-02 56 7 1 73 W 10 10 2 1 N26 584 W 10 5207 P 12/04-03 56 7 1 71 W 12 1 528 W 10 4629 P 12/04-04 56 7 0 71 W 13 1 472 W 10 4051 P 12/04-05 53 0 0 70 W 13 13 2 1 N37 416 W 9 3473 P 12/04-06 53 0 -1 71 W 13 1 433 W 10 3720 P 12/04-07 53 0 -1 73 W 13 1 451 W 10 3967 P 12/04-08 53 0 3 61 W 13 13 2 1 N37 468 W 10 4214 P 12/04-09 53 0 12 42 W 10 1 1920 W 14 31861 P 12/04-10 53 0 17 34 W 9 1 3371 NW 17 59508 F 12/04-11 63 0 20 32 W 8 8 2 1 N31 4823 NW 21 87156 G 12/04-12 63 0 21 30 W 9 1 5002 NW 23 100017 V 12/04-13 63 0 27 24 NW 13 1 5182 NW 25 112879 V 12/04-14 63 0 27 25 NW 15 24 3 1 N59 5361 NW 26 125740 V 12/04-15 63 0 25 28 NW 16 1 4017 NW 28 94800 G 12/04-16 63 0 21 36 W 16 1 2673 NW 28 63860 G 12/04-17 50 0 17 46 W 16 25 4 1 N67 1329 NW 29 32920 P 12/04-18 50 0 15 49 W 18 1 984 NW 28 24032 P 12/04-19 50 0 14 50 W 21 1 640 NW 25 15144 P 12/04-20 50 0 13 49 W 22 35 3 1 N55 295 NW 24 6257 P 12/04-21 50 0 13 51 W 22 1 246 W 24 5194 P 12/04-22 50 0 12 53 W 22 1 196 W 24 4131 P 12/04-23 40 0 12 54 W 22 35 2 1 NW46 147 W 24 3067 P 12/05-00 40 0 12 54 W 22 1 137 W 25 2963 P 12/05-01 40 0 11 54 W 23 1 127 W 26 2858 P 12/05-02 40 0 10 54 W 23 37 3 1 NW46 118 W 26 2753 P 12/05-03 40 0 10 55 W 23 1 119 W 26 2688 P 12/05-04 40 0 10 56 W 23 1 120 W 25 2622 P 12/05-05 58 1 10 57 W 22 35 2 1 NW46 121 W 24 2556 P 12/05-06 58 1 9 59 W 21 1 127 W 24 2651 P 12/05-07 58 1 9 61 W 20 1 132 W 24 2745 P 12/05-08 58 1 12 53 W 18 30 2 1 N20 138 W 24 2839 P 12/05-09 58 1 19 40 W 17 1 251 W 24 5505 P 12/05-10 58 1 24 33 W 16 1 365 W 25 8170 P 12/05-11 58 1 26 31 W 15 24 3 1 NW 5 478 W 26 10836 P 12/05-12 58 1 27 31 W 13 1 1071 W 25 22856 P 12/05-13 58 1 31 27 W 10 1 1665 W 24 34877 P 12/05-14 58 1 31 28 W 8 8 2 1 SW 9 2258 W 24 46898 F 12/05-15 58 1 30 31 W 7 1 1562 W 18 31568 P 12/05-16 58 1 26 39 W 6 1 865 W 13 16239 P 12/05-17 83 9 21 48 SW 5 5 2 1 W47 169 SW 6 909 P KEY: FORECAST - MONTH/DAY-HOUR OF FORECAST /24-HOUR CLOCK LOCAL TIME/ VALID AT SC - SKY COVER /PERCENT/ PP - PROBABILITY OF PRECIPITATION /PERCENT/ TF - TEMPERATURE /DEGREES F/ RH - RELATIVE HUMIDITY /PERCENT/ 20FT WIND - 20-FOOT WIND /MPH/ GST - 20-FOOT WIND GUST /MPH/ HI - HAINES INDEX LAL - LIGHTNING ACTIVITY LEVEL 10K WIND - 10000 FEET ABOVE GROUND LEVEL FREE-AIR WINDS /MPH/ MIXG HGT - MIXING HEIGHT /FEET ABOVE GROUND LEVEL/ TRAN WIND - TRANSPORT WINDS /MPH/ VENTL RATE - VENTILATION RATE /KNOT-FEET/ AJTV RATNG - SMOKE DISPERSION ADJECTIVE RATING P - POOR F - FAIR G - GOOD V - VERY GOOD E - EXCELLENT $$ FORECASTER...BAKER WFO BOULDER REQUESTED BY...BILL ALAKAI REASON FOR REQUEST...PRESCRIBED .TAG 20091203.EVERG.01/BOU