FNUS75 KBOU 211643 FWSBOU SPOT FORECAST FOR HELO TRAINING...USFS NATIONAL WEATHER SERVICE DENVER CO 1038 AM MDT TUE AUG 21 2012 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A WEAKER WEST TO NORTHWESTERLY FLOW ALOFT ASSOCIATED WITH A RIDGE OF HIGH PRESSURE WILL BE OVER THE AREA THROUGH THIS EVENING. ENOUGH MOISTURE WILL BE PRESENT FOR AN ISOLATED THUNDERSTORM OR TWO LATE THIS AFTERNOON AND EVENING. THE FLOW ALOFT WILL BECOME WEST TO SOUTHWESTERLY LATE TONIGHT AND WEDNESDAY AS A STORM SYSTEM MOVES INTO THE NORTHERN ROCKIES. THERE WILL BE A BETTER CHANCE OF THUNDERSTORMS DEVELOPING WEDNESDAY AFTERNOON WITH INCREASING WEST TO SOUTHWEST WINDS AS WELL. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TODAY... SKY/WEATHER.........MOSTLY SUNNY (10-20%) UNTIL 1200...THEN PARTLY CLOUDY(30-40%). SLIGHT CHANCE OF THUNDERSTORMS AFTER 1500. MAX TEMPERATURE.....71-75. MIN HUMIDITY........22-26%. 20-FOOT WINDS.......SOUTH TO SOUTHEAST WINDS AROUND 5 MPH UNTIL 1200...THEN UPSLOPE/UPVALLEY 4-10 MPH UNTIL 1500...THEN SOUTHEAST 4-7 MPH. TRANSPORT WINDS.....WEST AROUND 8 MPH. MIXING HEIGHT.......7800-8800 FT AGL UNTIL 1200...THEN 10400-11400 FT AGL. SMOKE DISPERSAL.....FAIR UNTIL 1100...THEN GOOD. HAINES INDEX........2 VERY LOW. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS UNTIL 2100. MIN TEMPERATURE.....43-47. MAX HUMIDITY........65-68%. 20-FOOT WINDS.......SOUTHEAST WINDS 6-7 MPH UNTIL 2100...THEN DOWNSLOPE/DOWNVALLEY 2-8 MPH UNTIL 2400...THEN WEST 7-13 MPH. TRANSPORT WINDS.....SOUTHWEST 4-8 MPH. MIXING HEIGHT.......8600-9600 FT AGL UNTIL 2000. BELOW 1000 FT AGL AFTER 2400. SMOKE DISPERSAL.....FAIR UNTIL 1900. POOR AFTER 0300. HAINES INDEX........2 VERY LOW. .WEDNESDAY... SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS AFTER 1200 UNTIL 1500...THEN CHANCE OF THUNDERSTORMS. MAX TEMPERATURE.....72-75. MIN HUMIDITY........25-30%. 20-FOOT WINDS.......WEST WINDS 7-13 MPH. TRANSPORT WINDS.....WEST 5-16 MPH. MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0700. 9400-10400 FT AGL AFTER 1200. SMOKE DISPERSAL.....POOR UNTIL 0900...THEN FAIR UNTIL 1000...THEN GOOD UNTIL 1200...THEN VERY GOOD UNTIL 1300...THEN GOOD UNTIL 1600...THEN FAIR. HAINES INDEX........5 MODERATE. FIRE WEATHER TABLE FOR HELO TRAINING. +++ 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 WR AT 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 08/21-10 4 0 0 64 34 SW 5 5 2 1 NW17 7342 NW 9 55070 F 08/21-11 4 4 1 67 31 SE 3 3 2 1 NW17 8989 NW 8 62104 G 08/21-12 37 4 1 69 29 E 3 3 2 1 NW17 10637 NW 7 69138 G 08/21-13 37 4 1 72 28 E 3 3 2 1 W17 10920 W 8 71918 G 08/21-14 37 4 1 73 27 SE 3 3 2 1 W17 11204 W 8 74699 G 08/21-15 37 10 2 74 27 SE 5 5 2 2 W17 11488 W 8 77480 G 08/21-16 37 10 2 74 26 SE 6 6 2 2 W17 10942 W 8 71501 G 08/21-17 37 10 2 73 26 SE 7 7 2 2 W16 10397 W 7 65522 G 08/21-18 43 10 2 72 27 SE 7 7 2 2 W16 9851 SW 7 59544 F 08/21-19 43 10 2 69 30 SE 6 6 2 2 W15 8422 SW 7 53317 F 08/21-20 43 10 2 65 33 S 5 5 2 2 W14 6993 SW 8 47090 F 08/21-21 43 0 0 62 37 S 3 3 2 1 W14 5564 SW 8 40863 F 08/21-22 43 0 0 60 40 S 3 3 2 1 W16 3796 SW 8 27665 P 08/21-23 43 0 0 57 44 SW 3 3 2 1 W18 2028 SW 7 14467 P 08/22-00 14 0 0 54 49 W 5 5 2 1 W21 260 SW 6 1269 P 08/22-01 14 0 0 51 55 W 6 6 2 1 W22 221 W 6 1132 P 08/22-02 14 0 0 49 59 W 6 6 2 1 W22 182 W 7 995 P 08/22-03 41 0 0 48 61 W 7 7 2 1 W22 143 W 7 858 P 08/22-04 41 0 0 47 62 W 8 8 2 1 W21 138 W 7 866 P 08/22-05 41 0 0 47 64 W 8 13 2 1 W20 133 W 8 874 P 08/22-06 55 0 0 45 68 W 8 13 2 1 W20 128 W 8 881 P 08/22-07 55 0 0 47 66 W 8 13 2 1 W18 1402 W10 17075 P 08/22-08 55 0 0 52 54 W 7 7 2 1 W17 2676 W13 33268 P 08/22-09 55 0 0 60 42 W 7 7 2 1 NW17 3949 W15 49461 F 08/22-10 55 0 0 65 35 W 8 13 4 1 NW15 6062 W14 69817 G 08/22-11 55 0 0 68 32 W 9 15 4 1 NW12 8175 W13 90173 G 08/22-12 74 16 3 71 30 W10 16 4 3 NW10 10287 W13 110529 V 08/22-13 74 16 3 72 30 W 9 14 4 3 W 9 10495 W10 95372 G 08/22-14 74 16 3 72 30 W 7 7 5 3 W10 10704 W 9 80215 G 08/22-15 74 30 9 73 30 W 5 5 5 4 W10 10912 W 7 65058 G 08/22-16 74 30 9 72 32 W 3 3 5 4 W 9 9817 NW 6 52833 F 08/22-17 74 30 9 71 34 W 2 2 4 4 NW 9 8722 NW 5 40607 F 08/22-18 69 26 6 69 37 W 2 2 4 4 NW 9 7627 NW 5 28382 P 08/22-19 69 26 6 66 41 W 2 2 4 4 NW12 5956 NW 3 21522 P 08/22-20 69 26 6 61 49 CALM 1 3 4 N14 4285 W 3 14662 P 08/22-21 69 1 0 57 56 SW 2 2 3 1 N15 2615 W 3 7802 P 08/22-22 69 1 0 54 62 SW 3 3 3 1 N14 1821 W 5 5764 P 08/22-23 69 1 0 52 65 W 6 6 3 1 N10 1027 W 7 3725 P 08/23-00 48 0 0 51 67 W 8 13 3 1 N 8 233 W 8 1686 P 08/23-01 48 0 0 50 68 W 9 14 3 1 NW 6 222 W 9 1735 P 08/23-02 48 0 0 50 70 W 9 15 3 1 NW 5 212 W 9 1783 P 08/23-03 48 0 0 49 72 W 9 15 3 1 NW 3 201 W10 1831 P 08/23-04 48 0 0 49 72 W 9 14 3 1 NW 3 200 W 9 1660 P 08/23-05 48 0 0 49 72 W 8 13 3 1 NW 2 199 W 8 1489 P 08/23-06 41 5 1 48 75 W 7 7 3 1 NW 2 198 W 8 1317 P 08/23-07 41 5 1 49 72 W 6 6 3 1 N 3 1808 NW 8 11312 P 08/23-08 41 5 1 53 62 NW 5 5 3 1 NE 5 3418 N 7 21307 P 08/23-09 41 5 1 59 49 NW 3 3 3 1 E 6 5028 NE 7 31302 P 08/23-10 41 5 1 64 41 N 5 5 3 1 E 7 6145 NE 8 44650 F 08/23-11 41 5 1 66 37 NE 6 6 3 1 SE 7 7261 E 9 57998 F 08/23-12 63 28 8 68 34 E 7 7 3 4 SE 8 8378 E10 71346 G 08/23-13 63 28 8 69 32 E 8 13 3 4 SE 9 8659 E10 75895 G 08/23-14 63 28 8 70 32 E 8 13 4 4 S10 8939 SE10 80443 G 08/23-15 63 28 8 70 32 E 8 13 4 4 S12 9220 SE10 84992 G 08/23-16 63 28 8 70 33 SE 7 7 4 4 S12 8574 SE10 78028 G 08/23-17 63 28 8 68 35 SE 6 6 3 4 SE12 7927 SE10 71064 G 08/23-18 74 31 10 66 38 SE 5 5 3 4 SE12 7281 SE10 64100 G 08/23-19 74 31 10 63 42 S 3 3 3 4 SE12 5723 SE 8 46562 F 08/23-20 74 31 10 59 49 SW 3 3 3 4 SE12 4166 SE 7 29023 P 08/23-21 74 10 2 55 54 SW 3 3 3 2 SE13 2609 S 5 11485 P 08/23-22 74 10 2 53 59 SW 3 3 3 2 SE14 1813 S 5 7898 P 08/23-23 74 10 2 51 62 W 5 5 3 2 SE14 1017 SW 5 4311 P 08/24-00 62 7 1 50 63 W 5 5 3 1 SE16 221 SW 3 724 P 08/24-01 62 7 1 50 64 W 5 5 3 1 SE18 225 SW 3 763 P 08/24-02 62 7 1 49 66 W 6 6 3 1 SE22 229 W 5 803 P 08/24-03 62 7 1 48 68 W 6 6 3 1 SE23 233 W 5 842 P 08/24-04 62 7 1 48 69 W 6 6 3 1 SE24 222 W 3 759 P 08/24-05 62 7 1 48 70 W 6 6 3 1 SE23 211 W 3 676 P 08/24-06 57 23 5 48 73 W 6 6 3 1 SE22 200 W 3 592 P KEY: FORECAST - MONTH/DAY-HOUR OF FORECAST /24-HOUR CLOCK LOCAL TIME/ VALID AT SC - SKY COVER /PERCENT/ PP - PROBABILITY OF PRECIPITATION 0.01 INCH /PERCENT/ WR - PROBABILITY OF WETTING RAIN 0.1 INCH /PERCENT/ AT - 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...WFO BOULDER REQUESTED BY...BROUWER REASON FOR REQUEST...PRESCRIBED .TAG 20120821.HELOT.01/BOU