FNUS75 KBOU 121247 FWSBOU SPOT FORECAST FOR LEFTHAND CANYON FIRE...USFS NATIONAL WEATHER SERVICE DENVER CO 547 AM MST SAT MAR 12 2011 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...SURFACE HIGH PRESSURE BUILT OVER NEBRASKA AND NORTHEASTERN COLORADO OVERNIGHT WHICH WILL COMBINE WITH LOWER PRESSURE OVER WESTERN COLORADO TO PRODUCE EASTERLY WINDS INTO THE FOOTHILLS TODAY. COOLER AIR HAS ALSO MOVED INTO THE AREA WHICH WILL IMPROVE RELATIVE HUMIDITY VALUES THROUGH THE AFTERNOON. ALOFT...ZONAL FLOW WITH MODERATE WEST WINDS WILL CONTINUE TODAY AND TONIGHT. AN EMBEDDED WEATHER DISTURBANCE WILL MOVE OVER THE AREA TONIGHT WITH A CHANCE OF RAIN OR SNOW. A WEAK UPPER LEVEL RIDGE WILL BUILD OVER NORTHWESTERN COLORADO ON SUNDAY WHICH WILL SWITCH FLOW ALOFT TO MODERATE NORTHWESTERLY. AT LOWER LEVELS...SOUTHEASTERLY WINDS WILL CONTINUE. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........MOSTLY SUNNY UNTIL 1100...THEN PARTLY CLOUDY(50-60%) UNTIL 1600...THEN MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AFTER 1400. MAX TEMPERATURE.....53-58. MIN HUMIDITY........24-32%. 20-FOOT WINDS.......UPSLOPE/UPVALLEY 6-12 MPH. TRANSPORT WINDS.....WEST 9-20 MPH. MIXING HEIGHT.......RISING TO 6800-7800 FT AGL AFTER 1100. SMOKE DISPERSAL.....POOR UNTIL 1100...THEN VERY GOOD UNTIL 1700...THEN GOOD. HAINES INDEX........2 VERY LOW. .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SNOW SHOWERS UNTIL 2300...THEN SLIGHT CHANCE OF SNOW SHOWERS. MIN TEMPERATURE.....28-34. MAX HUMIDITY........50-58%. 20-FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-8 MPH UNTIL 2100...THEN NORTHWEST 6-12 MPH. TRANSPORT WINDS.....WEST 12-20 MPH. MIXING HEIGHT.......5600-6400 FT AGL UNTIL 2000...THEN LESS THAN 1000 FT AGL. SMOKE DISPERSAL.....GOOD UNTIL 1900...THEN FAIR UNTIL 2100...THEN POOR. HAINES INDEX........3 VERY LOW. .SUNDAY... SKY/WEATHER.........MOSTLY CLOUDY(50-60%) UNTIL 1700...THEN PARTLY CLOUDY(30-40%). SLIGHT CHANCE OF RAIN SHOWERS AND SNOW SHOWERS UNTIL 1700. MAX TEMPERATURE.....51-57. MIN HUMIDITY........24-32%. 20-FOOT WINDS.......UPSLOPE/UPVALLEY 4-10 MPH UNTIL 1200...THEN WEST 6-12 MPH. TRANSPORT WINDS.....WEST 14-20 MPH. MIXING HEIGHT.......4000-5000 FT AGL UNTIL 1000...THEN 7200-8200 FT AGL. SMOKE DISPERSAL.....FAIR UNTIL 0700...THEN GOOD UNTIL 0900...THEN VERY GOOD UNTIL 1700...THEN GOOD. HAINES INDEX........2 VERY LOW. .FORECAST DAYS 3 THROUGH 5... .MONDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND SNOW SHOWERS AFTER 1800. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 60S. WEST WINDS AROUND 7 MPH WITH GUSTS TO 20 MPH. .TUESDAY...PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND SNOW SHOWERS UNTIL 0600. LOWS IN THE MID 30S. HIGHS IN THE MID 50S. WEST WINDS AROUND 7 MPH. .WEDNESDAY...PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS AND SNOW SHOWERS AFTER 1800. LOWS IN THE MID 30S. HIGHS IN THE MID 60S. SOUTHWEST WINDS AROUND 10 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 03/12-05 62 0 29 68 NE 5 5 2 1 W38 575 W 2 1424 P 03/12-06 62 4 36 54 NE 5 1 1748 W 8 23611 P 03/12-07 62 4 37 57 N 6 1 2920 W 14 45797 F 03/12-08 48 4 43 47 N 6 6 2 1 W40 4093 W 20 67984 G 03/12-09 48 4 47 42 N 6 1 4823 W 20 81683 G 03/12-10 48 4 49 39 N 5 1 5552 W 20 95382 G 03/12-11 48 4 50 36 N 5 5 2 1 W44 6282 W 20 109082 V 03/12-12 65 8 51 34 N 5 1 6894 W 20 113915 V 03/12-13 65 8 53 31 N 3 1 7507 W 18 118749 V 03/12-14 65 8 54 30 N 3 3 2 1 W39 8119 W 17 123582 V 03/12-15 65 8 55 28 N 3 1 7864 W 16 111389 V 03/12-16 65 8 54 28 NE 2 1 7610 W 15 99196 G 03/12-17 76 28 52 31 NE 2 2 2 1 W37 7355 W 14 87003 G 03/12-18 76 28 49 36 NE 2 1 6450 SW 12 69693 G 03/12-19 76 28 46 42 NE 2 1 5545 SW 10 52382 F 03/12-20 76 28 44 47 E 3 3 2 1 W40 4640 SW 9 35071 P 03/12-21 76 28 42 50 NE 5 1 4258 SW 13 44246 F 03/12-22 76 28 43 48 NW 5 1 3875 SW 16 53421 F 03/12-23 69 20 43 48 W 6 6 3 1 W44 3493 W 21 62596 G 03/13-00 69 20 43 48 W 7 1 2850 W 21 51650 F 03/13-01 69 20 42 49 NW 9 1 2207 W 22 40704 F 03/13-02 69 20 40 52 NW 9 9 2 1 W46 1565 W 22 29758 P 03/13-03 69 20 40 53 N 8 1 1574 W 20 26856 P 03/13-04 69 20 40 53 N 6 1 1583 W 17 23953 P 03/13-05 53 20 39 53 NE 3 3 2 1 W45 1592 W 15 21051 P 03/13-06 53 20 40 51 N 3 1 2947 W 20 51508 F 03/13-07 53 20 41 49 NW 2 1 3754 W 21 68554 G 03/13-08 53 20 46 39 W 2 2 2 1 W45 4561 W 22 85599 G 03/13-09 53 20 49 35 NW 2 1 5674 W 21 103678 V 03/13-10 53 20 51 32 NW 2 1 6786 W 21 121757 V 03/13-11 53 10 53 30 NW 3 3 2 1 W36 7898 W 21 139837 V 03/13-12 53 10 52 30 NW 5 1 8082 W 20 136027 V 03/13-13 53 10 54 29 W 6 1 8267 W 18 132218 V 03/13-14 53 10 54 28 W 7 7 2 1 W30 8451 W 17 128409 V 03/13-15 53 10 54 28 W 7 1 7990 W 16 110271 V 03/13-16 53 10 54 28 W 7 1 7529 W 14 92133 G 03/13-17 35 0 52 31 W 6 6 2 1 W25 7068 W 12 73995 G 03/13-18 35 0 48 36 W 5 1 4767 W 9 49555 F 03/13-19 35 0 46 39 W 3 1 2466 W 7 25115 P 03/13-20 35 0 31 70 W 3 3 2 1 NW20 165 W 5 675 P 03/13-21 35 0 44 42 W 3 1 1230 W 6 9572 P 03/13-22 35 0 45 40 W 5 1 2295 W 8 18468 P 03/13-23 30 0 45 39 SW 6 6 2 1 W12 3360 W 9 27365 P 03/14-00 30 0 45 37 SW 6 1 2671 W 9 21423 P 03/14-01 30 0 44 37 W 6 1 1983 W 9 15481 P 03/14-02 30 0 42 36 W 6 6 2 1 W17 1294 W 8 9540 P 03/14-03 30 0 42 34 W 6 1 1189 W 9 8982 P 03/14-04 30 0 42 33 W 7 1 1084 W 9 8424 P 03/14-05 41 5 42 32 W 7 7 2 1 W29 979 W 9 7866 P 03/14-06 41 5 41 33 W 6 1 1649 W 13 21028 P 03/14-07 41 5 41 33 W 6 1 2319 W 15 34191 P 03/14-08 41 5 48 26 W 5 5 2 1 W33 2989 W 18 47354 F 03/14-09 41 5 51 24 W 5 1 4139 W 22 87751 G 03/14-10 41 5 53 23 SW 6 1 5288 W 26 128148 V 03/14-11 41 5 55 23 S 6 6 2 1 W40 6438 W 30 168545 E 03/14-12 41 5 54 24 S 6 1 6532 W 31 178793 E 03/14-13 41 5 56 24 SW 7 1 6626 W 32 189042 E 03/14-14 41 5 57 25 SW 7 7 2 1 W37 6720 W 35 199290 E 03/14-15 41 5 58 26 SW 7 1 6196 W 33 177815 E 03/14-16 41 5 56 28 W 6 1 5671 W 31 156340 E 03/14-17 60 10 54 32 W 6 6 2 1 W29 5147 W 30 134866 V 03/14-18 60 10 51 37 W 7 1 3493 W 25 90727 G 03/14-19 60 10 49 40 W 9 1 1840 W 20 46589 F 03/14-20 60 10 34 69 W 10 16 3 1 SW33 187 W 15 2450 P 03/14-21 60 10 46 43 W 12 1 613 W 20 13347 P 03/14-22 60 10 47 41 W 12 1 1039 W 23 24243 P 03/14-23 34 10 47 41 W 12 18 3 1 SW33 1465 W 28 35139 P 03/15-00 34 10 47 41 W 12 1 1432 W 30 36977 P 03/15-01 34 10 46 41 W 10 1 1398 W 32 38815 P 03/15-02 34 10 45 43 W 9 15 3 1 W36 1364 W 35 40653 F 03/15-03 34 10 45 42 W 8 1 1375 W 33 40111 F 03/15-04 34 10 45 42 W 8 1 1385 W 33 39570 P 03/15-05 40 8 44 42 W 7 7 3 1 W44 1396 W 32 39028 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 $$ DANKERS...WFO BOULDER REQUESTED BY...KENT SPERRY REASON FOR REQUEST...WILDFIRE .TAG 20110312.LEFTH.03/BOU