FNUS75 KBOU 201248 FWSBOU SPOT FORECAST FOR SKY ISLAND...USFS NATIONAL WEATHER SERVICE DENVER CO 648 AM MDT THU OCT 20 2011 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A NORTHWEST FLOW ALOFT WILL PREVAIL AS AN UPPER LEVEL RIDGE OF HIGH PRESSURE REMAINS OVER THE REGION. AIRMASS WILL REMAIN DRY TODAY WITH RELATIVE HUMIDITIES APPROACHING SINGLE DIGITS. RIDGE TOP OBSERVATIONS INDICATE THE AIRMASS IS QUITE DRY BUT NOT AS EXTREMELY DRY AS YESTERDAY. WINDS WILL DECREASE MID TO LATE AFTERNOON AS WINDS ALOFT DECREASE AND THE PRESSURE GRADIENT WEAKENS. BY SUNSET...EXPECT WINDS TO BE LIGHT. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........SUNNY. MAX TEMPERATURE.....58-62. MIN HUMIDITY........7-12%. 20-FOOT WINDS.......NORTHWEST WINDS 5-12 MPH. GUSTS UP TO 20 MPH...MAINLY IN THE MORNING. TRANSPORT WINDS.....NORTHWEST 9-20 MPH. MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1000. 7400-8400 FT AGL AFTER 1200. SMOKE DISPERSAL.....POOR UNTIL 1000. GOOD AFTER 1200. HAINES INDEX........3 VERY LOW. .TONIGHT... SKY/WEATHER.........CLEAR. MIN TEMPERATURE.....27-32. MAX HUMIDITY........40-50%. 20-FOOT WINDS.......NORTHWEST WINDS AROUND 5 MPH UNTIL 2100...THEN DOWNSLOPE/DOWNVALLEY 2-8 MPH. TRANSPORT WINDS.....WEST 4-12 MPH. MIXING HEIGHT.......7800 FT AGL UNTIL 1900. BELOW 1000 FT AGL AFTER 2100. SMOKE DISPERSAL.....GOOD UNTIL 1900. POOR AFTER 2100. HAINES INDEX........5 MODERATE. .FRIDAY... SKY/WEATHER.........MOSTLY SUNNY. MAX TEMPERATURE.....62-66. MIN HUMIDITY........6-11%. 20-FOOT WINDS.......NORTHWEST WINDS 7-13 MPH. GUSTS UP TO 20 MPH LATE IN THE AFTERNOON. TRANSPORT WINDS.....WEST 8-16 MPH. MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 1000. 9200-10200 FT AGL AFTER 1400. SMOKE DISPERSAL.....POOR UNTIL 1000. EXCELLENT AFTER 1500. HAINES INDEX........5 MODERATE. FIRE WEATHER TABLE FOR SKY ISLAND. +++ 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 10/20-06 0 0 0 31 54 W 9 15 3 1 NW22 141 W 9 1193 P 10/20-07 0 0 0 30 59 W 9 15 3 1 NW23 152 W 9 1288 P 10/20-08 0 0 0 28 63 NW 9 15 2 1 NW24 162 NW10 1383 P 10/20-09 0 0 0 31 55 NW 9 15 2 1 NW26 173 NW10 1478 P 10/20-10 0 0 0 36 44 NW10 16 2 1 NW26 2126 NW13 34967 P 10/20-11 0 0 0 45 31 NW12 17 2 1 NW26 4078 NW16 68455 G 10/20-12 0 0 0 50 25 NW12 18 2 1 NW26 6031 N20 101944 V 10/20-13 0 0 0 53 21 NW12 18 2 1 NW29 6946 N17 100599 V 10/20-14 0 0 0 58 17 NW10 16 2 1 NW31 7860 NW15 99255 G 10/20-15 0 0 0 59 15 NW 9 15 2 1 NW32 8775 NW13 97911 G 10/20-16 0 0 0 60 14 NW 8 8 2 1 NW32 8423 NW12 88074 G 10/20-17 0 0 0 59 13 NW 6 6 2 1 NW31 8071 W12 78238 G 10/20-18 1 0 0 58 13 NW 5 5 2 1 NW30 7719 W10 68402 G 10/20-19 1 0 0 52 17 NW 3 3 2 1 NW31 5217 W 8 45828 F 10/20-20 1 0 0 45 22 W 3 3 3 1 NW32 2715 W 6 23254 P 10/20-21 1 0 0 42 27 W 3 3 3 1 NW33 213 W 3 680 P 10/20-22 1 0 0 39 30 W 2 2 3 1 NW32 192 W 3 563 P 10/20-23 1 0 0 36 34 W 2 2 4 1 NW31 171 W 3 446 P 10/21-00 1 0 0 35 36 CALM 1 4 1 NW31 151 W 2 329 P 10/21-01 1 0 0 33 40 CALM 1 4 1 NW31 145 W 2 310 P 10/21-02 1 0 0 32 43 CALM 1 5 1 NW31 138 W 2 291 P 10/21-03 1 0 0 32 43 CALM 1 5 1 NW31 132 W 2 272 P 10/21-04 1 0 0 31 45 CALM 1 5 1 NW30 134 W 2 282 P 10/21-05 1 0 0 32 44 CALM 1 5 1 NW29 135 W 2 291 P 10/21-06 1 0 0 30 48 W 6 6 5 1 NW28 137 W 7 756 P 10/21-07 1 0 0 32 45 W 5 5 5 1 NW25 151 W 6 780 P 10/21-08 1 0 0 34 40 W 5 5 5 1 W24 166 W 6 804 P 10/21-09 1 0 0 39 33 W 5 5 5 1 W24 180 W 6 827 P 10/21-10 1 0 0 45 26 W 6 6 5 1 W24 2017 W 8 23885 P 10/21-11 1 0 0 52 19 W 7 7 5 1 W24 3854 W12 46943 F 10/21-12 20 2 0 58 15 W 8 13 5 1 W26 5691 NW14 70001 G 10/21-13 20 2 0 61 13 W 9 15 4 1 W29 7077 NW16 104377 V 10/21-14 20 2 0 62 11 W10 17 4 1 W32 8462 W18 138753 V 10/21-15 20 2 0 63 10 W12 18 3 1 W35 9847 W21 173129 E 10/21-16 20 2 0 62 10 NW12 18 3 1 W36 10169 W21 186716 E 10/21-17 20 2 0 59 11 NW10 16 3 1 W36 10491 NW22 200303 E 10/21-18 23 10 2 55 13 NW 9 15 3 1 W36 10814 NW23 213890 E 10/21-19 23 10 2 50 15 NW 8 14 3 1 NW33 7644 NW18 146162 V 10/21-20 23 10 2 45 20 NW 8 8 2 1 NW31 4474 NW14 78433 G 10/21-21 23 10 2 41 25 NW 7 7 2 1 NW30 1304 NW 9 10705 P 10/21-22 23 10 2 39 29 NW 7 7 2 1 NW28 969 NW 8 7648 P 10/21-23 23 10 2 38 32 W 6 6 2 1 NW26 633 NW 7 4592 P 10/22-00 21 4 1 38 35 W 6 6 2 1 NW26 298 W 6 1535 P 10/22-01 21 4 1 37 38 W 6 6 2 1 W28 264 W 6 1368 P 10/22-02 21 4 1 37 41 W 6 6 2 1 W30 229 W 6 1201 P 10/22-03 21 4 1 36 43 W 6 6 2 1 W32 195 W 6 1034 P 10/22-04 21 4 1 36 45 W 6 6 2 1 W31 191 W 6 987 P 10/22-05 21 4 1 35 47 W 5 5 2 1 NW30 188 W 6 941 P 10/22-06 19 3 1 35 48 W 5 5 2 1 NW29 184 W 6 894 P 10/22-07 19 3 1 36 46 W 3 3 2 1 NW30 202 W 5 882 P 10/22-08 19 3 1 38 42 W 3 3 2 1 NW32 220 W 5 869 P 10/22-09 19 3 1 41 37 W 3 3 2 1 NW33 238 W 5 857 P 10/22-10 19 3 1 46 30 W 5 5 2 1 NW32 2532 W 7 29016 P 10/22-11 19 3 1 52 23 W 7 7 2 1 NW31 4825 W10 57175 F 10/22-12 19 0 0 57 19 NW 9 15 2 1 NW31 7119 NW14 85334 G 10/22-13 19 0 0 59 16 NW10 17 2 1 NW32 7877 NW15 103499 V 10/22-14 19 0 0 61 15 NW12 18 2 1 NW35 8635 NW16 121663 V 10/22-15 19 0 0 61 14 NW12 18 2 1 NW37 9393 NW17 139828 V 10/22-16 19 0 0 60 13 NW10 17 2 1 NW39 9131 NW17 133972 V 10/22-17 19 0 0 57 14 NW 9 15 2 1 NW40 8868 NW16 128117 V 10/22-18 18 3 1 54 16 NW 8 13 2 1 NW41 8606 NW16 122262 V 10/22-19 18 3 1 52 17 NW 7 7 2 1 NW43 5921 NW14 82763 G 10/22-20 18 3 1 46 22 NW 6 6 2 1 NW43 3236 NW10 43265 F 10/22-21 18 3 1 43 26 NW 6 6 2 1 NW44 551 NW 8 3766 P 10/22-22 18 3 1 41 30 NW 6 6 2 1 NW45 469 NW 7 3087 P 10/22-23 18 3 1 39 35 W 6 6 2 1 NW46 388 W 7 2409 P 10/23-00 6 3 1 38 38 W 6 6 2 1 NW47 306 W 7 1730 P 10/23-01 6 3 1 36 42 W 6 6 2 1 NW47 272 W 7 1510 P 10/23-02 6 3 1 35 45 W 5 5 2 1 NW45 239 W 6 1289 P 10/23-03 6 3 1 35 46 W 5 5 2 1 NW44 205 W 6 1068 P 10/23-04 6 3 1 34 48 W 5 5 2 1 NW44 198 W 6 1011 P 10/23-05 6 3 1 35 49 W 5 5 2 1 NW44 191 W 6 954 P 10/23-06 3 2 0 32 53 W 5 5 2 1 NW44 184 W 6 896 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...DAVE HOWARD REASON FOR REQUEST...PRESCRIBED .TAG 20111020.SKYIS.01/BOU