FNUS75 KBOU 120345 FWSBOU SPOT FORECAST FOR LEFTHAND CANYON FIRE...USFS NATIONAL WEATHER SERVICE DENVER CO 840 PM MST FRI MAR 11 2011 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...SURFACE WINDS WILL CONTINUE TO DIE DOWN THE EVENING AS THE SHIFT TO DOWNSLOPE/DOWNVALLEY BREEZES LATER THIS EVENING. AND AS TEMPERATURES FALL...RELATIVE HUMIDITIES WILL RISE. FOR SATURDAY... LIGHT DOWNSLOPE/DOWNVALLEY BREEZES EARLY IN THE MORNING WILL GRADUALLY SHIFT TO AN EASTERLY DIRECTION BY LATE MORNING...AND REMAIN LIGHT IN SPEED. ALSO LOOK FOR A GRADUAL INCREASE IN CLOUD COVER ABOVE MOUNTAIN TOP LEVEL THROUGH THE DAY IN ADVANCE OF A WEAK UPPER LEVEL WEATHER DISTURBANCE DROPPING OUT OF IDAHO AND WESTERN WYOMING. EVEN WITH THE INCREASED CLOUD COVER TEMPERATURES SHOULD AGAIN REMAIN WELL ABOVE AVERAGE. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TONIGHT... SKY/WEATHER.........PARTLY CLOUDY(30-40%). MIN TEMPERATURE.....26-30. MAX HUMIDITY........73-78%. 20-FOOT WINDS.......SOUTH-SOUTHEAST WINDS 7-13 MPH UNTIL AROUND 2200...THEN DOWNSLOPE/DOWNVALLEY AROUND 8 MPH. TRANSPORT WINDS.....SOUTHWEST 8-14 MPH. MIXING HEIGHT.......1400-2400 FT AGL UNTIL 2400...LOWERING TO BELOW 1000 FT AGL AFTER 0300. SMOKE DISPERSAL.....POOR. HAINES INDEX........4 LOW. .SATURDAY... SKY/WEATHER.........PARTLY CLOUDY(30-45%) UNTIL 1400...THEN BECOMING MOSTLY CLOUDY. ISOLATED RAIN SHOWERS AFTER 1500. MAX TEMPERATURE.....52-55. MIN HUMIDITY........29-34%. 20-FOOT WINDS.......DOWNSLOPE/DOWNVALLEY WINDS AROUND 9 MPH UNTIL AROUND 1030...THEN UPSLOPE/UPVALLEY 5-10 MPH. TRANSPORT WINDS.....WEST 14-20 MPH. MIXING HEIGHT.......1800-2800 FT AGL UNTIL 1000...RISING TO 6000-7000 FT AGL BY 1400. SMOKE DISPERSAL.....POOR UNTIL 0900...BECOMING GOOD AFTER 1100. HAINES INDEX........2 VERY LOW. .SATURDAY NIGHT... SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW SHOWERS UNTIL 2300...THEN A SLIGHT CHANCE OF SNOW SHOWERS. MIN TEMPERATURE.....26-31. MAX HUMIDITY........74-79%. 20-FOOT WINDS.......WEST-NORTHWEST WINDS 7-12 MPH. TRANSPORT WINDS.....WEST 10-16 MPH. MIXING HEIGHT.......4800 FT AGL UNTIL 1900...THEN 2600 FT AGL UNTIL 2000...THEN BELOW 1000 FT AGL UNTIL 2100...THEN 1800 FT AGL UNTIL 2200...THEN 3600 FT AGL UNTIL 2300...THEN 3800-4800 FT AGL UNTIL 0500...THEN 3200 FT AGL. SMOKE DISPERSAL.....FAIR UNTIL 1900...THEN POOR UNTIL 2200...THEN FAIR UNTIL 2300...THEN GOOD UNTIL 0200...THEN FAIR UNTIL 0400...THEN POOR. HAINES INDEX........2 VERY LOW. .SUNDAY... SKY/WEATHER.........MOSTLY CLOUDY(50-60%). SLIGHT CHANCE OF RAIN SHOWERS AND SNOW SHOWERS UNTIL 1700. MAX TEMPERATURE.....55-58. MIN HUMIDITY........25-30%. 20-FOOT WINDS.......WEST WINDS AROUND 5 MPH UNTIL 0900...THEN SOUTH 5-12 MPH UNTIL 1500...THEN WEST 6-7 MPH. TRANSPORT WINDS.....WEST 12-16 MPH. MIXING HEIGHT.......7400-8400 FT AGL. SMOKE DISPERSAL.....FAIR UNTIL 0700...THEN GOOD. HAINES INDEX........2 VERY LOW. .FORECAST DAYS 3 THROUGH 5... .MONDAY...PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 50S. WEST WINDS AROUND 9 MPH WITH GUSTS TO 20 MPH. .TUESDAY...PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE UPPER 50S. WEST WINDS AROUND 6 MPH. .WEDNESDAY...PARTLY CLOUDY. SLIGHT CHANCE OF RAIN AND SNOW AFTER 1800. LOWS IN THE MID 30S. HIGHS IN THE LOWER 60S. SOUTHWEST WINDS AROUND 12 MPH WITH GUSTS TO 20 MPH. .THURSDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW UNTIL 0600. SLIGHT CHANCE OF RAIN. SLIGHT CHANCE OF SNOW AFTER 1800. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 60S. WEST WINDS AROUND 7 MPH WITH GUSTS TO 20 MPH. FIRE WEATHER TABLE FOR LEFTHAND CANYON FIRE. +++ DATA IN THE FOLLOWING TABLE HAS BEEN SAMPLED DIRECTLY FROM THE FORECAST DATABASE. VALUES IN THE TABLE MAY VARY SLIGHTLY FROM INFORMATION IN THE NARRATIVE 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 03/11-20 7 0 45 37 SE 9 15 4 1 W39 1094 S 10 9877 P 03/11-21 7 0 41 43 SE 8 1 1625 S 12 17489 P 03/11-22 7 0 38 50 SE 8 1 2157 S 13 25101 P 03/11-23 23 0 36 55 SE 7 7 2 1 W48 2689 S 14 32712 P 03/12-00 23 0 34 60 S 6 1 2264 S 13 25643 P 03/12-01 23 0 33 63 S 6 1 1840 S 10 18573 P 03/12-02 24 0 32 66 SW 5 5 2 1 W47 1415 S 9 11503 P 03/12-03 24 0 30 67 SW 5 1 1124 SW 7 8208 P 03/12-04 24 0 29 68 W 5 1 834 W 6 4913 P 03/12-05 47 4 29 68 NW 5 5 2 1 W38 543 W 3 1618 P 03/12-06 47 4 29 72 NW 5 1 1007 W 6 6849 P 03/12-07 47 4 30 76 NW 5 1 1472 W 8 12080 P 03/12-08 53 4 37 60 N 5 5 2 1 W40 1936 W 10 17310 P 03/12-09 53 4 42 50 N 5 1 3432 W 14 48992 F 03/12-10 53 4 46 42 E 5 1 4927 W 17 80674 G 03/12-11 59 18 50 36 SE 5 5 2 1 W44 6423 W 20 112355 V 03/12-12 59 18 52 33 SE 5 1 6637 W 18 107338 V 03/12-13 59 18 52 32 SE 3 1 6850 W 17 102321 V 03/12-14 59 18 52 32 SE 3 3 2 1 W39 7064 W 16 97303 G 03/12-15 59 18 52 31 SE 2 1 7060 W 15 92146 G 03/12-16 59 18 52 31 SE 2 1 7057 W 14 86989 G 03/12-17 70 28 52 31 SE 2 2 2 1 W37 7053 W 14 81832 G 03/12-18 70 28 46 40 S 3 1 4790 W 10 54846 F 03/12-19 70 28 44 45 SW 5 1 2528 W 7 27861 P 03/12-20 70 28 31 77 W 6 6 2 1 W40 265 W 3 875 P 03/12-21 70 28 43 48 W 5 1 1840 W 9 25747 P 03/12-22 70 28 44 46 W 5 1 3503 W 13 50651 F 03/12-23 70 20 44 46 W 5 5 2 1 W40 5165 W 17 75555 G 03/13-00 70 20 44 45 W 5 1 4838 W 16 68308 G 03/13-01 70 20 43 47 W 6 1 4511 W 15 61061 G 03/13-02 70 20 42 49 W 6 6 2 1 W41 4184 W 15 53815 F 03/13-03 70 20 42 49 W 6 1 3884 W 14 47139 F 03/13-04 70 20 41 49 NW 6 1 3585 W 13 40464 F 03/13-05 53 10 41 50 NW 6 6 2 1 W43 3286 W 12 33789 P 03/13-06 53 10 40 51 W 5 1 4112 W 13 47761 F 03/13-07 53 10 41 49 W 3 1 4939 W 14 61734 G 03/13-08 53 10 46 39 SW 3 3 2 1 W37 5766 W 15 75707 G 03/13-09 53 10 49 35 SW 5 1 6566 W 15 81902 G 03/13-10 53 10 51 32 S 7 1 7365 W 14 88096 G 03/13-11 53 10 53 30 S 8 13 2 1 W32 8165 W 14 94291 G 03/13-12 53 10 52 30 S 7 1 8398 W 14 99102 G 03/13-13 53 10 54 29 S 3 1 8632 W 14 103914 V 03/13-14 53 10 54 28 S 2 2 2 1 W31 8865 W 14 108725 V 03/13-15 53 10 55 27 SW 3 1 8269 W 13 95219 G 03/13-16 53 10 54 28 W 5 1 7673 W 13 81712 G 03/13-17 35 0 52 31 W 7 7 2 1 NW31 7077 W 12 68206 G 03/13-18 35 0 48 35 W 7 1 4766 W 9 45762 F 03/13-19 35 0 46 38 W 7 1 2455 W 8 23317 P 03/13-20 35 0 31 69 W 7 7 2 1 W26 144 W 7 873 P 03/13-21 35 0 44 41 W 8 1 1133 W 8 8464 P 03/13-22 35 0 45 39 W 10 1 2123 W 8 16056 P 03/13-23 11 0 45 39 W 12 18 2 1 W23 3113 W 9 23647 P 03/14-00 11 0 45 37 W 12 1 2608 W 9 19922 P 03/14-01 11 0 44 36 W 12 1 2102 W 9 16197 P 03/14-02 11 0 42 36 W 10 16 2 1 W28 1597 W 9 12471 P 03/14-03 11 0 42 34 W 10 1 1469 W 9 11633 P 03/14-04 11 0 42 32 W 9 1 1340 W 9 10795 P 03/14-05 41 5 42 32 W 9 15 2 1 W31 1211 W 9 9957 P 03/14-06 41 5 41 34 W 8 1 1966 W 10 17224 P 03/14-07 41 5 41 34 W 8 1 2720 W 10 24491 P 03/14-08 41 5 48 28 SW 7 7 2 1 W35 3475 W 10 31758 P 03/14-09 41 5 51 26 SW 6 1 4707 W 13 57188 F 03/14-10 41 5 53 26 SW 6 1 5939 W 15 82619 G 03/14-11 41 5 55 25 SW 6 6 2 1 W38 7171 W 17 108050 V 03/14-12 41 5 54 27 SW 6 1 7451 W 17 115278 V 03/14-13 41 5 56 26 SW 7 1 7731 W 18 122507 V 03/14-14 41 5 57 27 W 7 7 2 1 W41 8011 W 18 129735 V 03/14-15 41 5 58 26 W 7 1 7704 W 18 119850 V 03/14-16 41 5 56 29 W 8 1 7398 W 17 109965 V 03/14-17 41 5 54 32 W 8 13 2 1 W45 7092 W 16 100080 V 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...BOULDER WFO BOULDER REQUESTED BY...KENT SPERRY REASON FOR REQUEST...WILDFIRE .TAG 20110311.LEFTH.01/BOU