FNUS75 KBOU 051150 FWSBOU SPOT FORECAST FOR COW CREEK...NPS NATIONAL WEATHER SERVICE DENVER CO 540 AM MDT SUN SEP 5 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A WARM AND VERY DRY AIRMASS WILL BE SPREADING ACROSS NORTHERN COLORADO TODAY AHEAD OF AN UPPER LEVEL TROUGH. WINDS WILL BE INCREASING THIS MORNING...WITH GUSTY WINDS THEN CONTINUING THROUGH TONIGHT. THIS WILL SIGNIFICANTLY INCREASE THE FIRE DANGER THREAT. WINDY CONDITIONS ARE EXPECTED TO CONTINUE THROUGH MONDAY...BUT TEMPERATURES WILL BE COOLER. HOWEVER...RELATIVE HUMIDITIES WILL REMAIN LOW AND KEEP THE FIRE DANGER THREAT ELEVATED. LIGHTER WINDS WILL PREVAIL TUESDAY AND WEDNESDAY BEFORE ANOTHER TROUGH AND STRONGER WINDS APPROACH FRIDAY. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........MOSTLY SUNNY. MAX TEMPERATURE.....68-73. MIN HUMIDITY........11-13%. 20-FOOT WINDS.......BREEZY. WEST WINDS 14-24 MPH WITH GUSTS TO 35 MPH ON RIDGES. TRANSPORT WINDS.....WEST 20-28 MPH UNTIL 1200...THEN AROUND 36 MPH. MIXING HEIGHT.......1000-2000 FT AGL UNTIL 0800...THEN INCREASING TO 12400-13400 FT AGL BY 1200. SMOKE DISPERSAL.....POOR UNTIL 0800...THEN GOOD UNTIL 1000...THEN EXCELLENT. HAINES INDEX........4 LOW. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY(35-45%). MIN TEMPERATURE.....41. MAX HUMIDITY........44%. 20-FOOT WINDS.......BREEZY. WEST WINDS 15-25 MPH WITH GUSTS TO 35 MPH. TRANSPORT WINDS.....WEST 28-36 MPH UNTIL 2400...THEN AROUND 24 MPH. MIXING HEIGHT.......12800 FT AGL UNTIL 1900...THEN DECREASING TO AROUND 1000 FT AGL AFTER 2400. SMOKE DISPERSAL.....EXCELLENT UNTIL 1900...BECOMING POOR BY 2300. HAINES INDEX........3 VERY LOW. .LABOR DAY... SKY/WEATHER.........MOSTLY SUNNY. MAX TEMPERATURE.....58. MIN HUMIDITY........15%. 20-FOOT WINDS.......WINDY. WEST WINDS 20-30 MPH WITH GUSTS TO 42 MPH. TRANSPORT WINDS.....WEST 32-40 MPH UNTIL 1200...THEN 44-56 MPH. MIXING HEIGHT.......1800-2800 FT AGL UNTIL 0800...THEN 6800-7800 FT AGL UNTIL 1100...THEN 9200-10200 FT AGL UNTIL 1500...THEN 6800-7400 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 0700...THEN VERY GOOD UNTIL 0800...THEN EXCELLENT. HAINES INDEX........4 LOW. .FORECAST DAYS 3 THROUGH 5... .TUESDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 50S. SOUTHWEST WINDS AROUND 12 MPH WITH GUSTS TO 30 MPH. .WEDNESDAY...PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS AFTER 1200. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 50S. SOUTH WINDS AROUND 11 MPH WITH GUSTS TO 25 MPH. .THURSDAY...PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS AFTER 1200. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 60S. SOUTHWEST WINDS AROUND 17 MPH WITH GUSTS TO 30 MPH. EXPERIMENTAL FIRE WEATHER TABLE FOR COW CREEK. +++ 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 09/05-05 15 0 50 27 W 10 1 205 W 12 2061 P 09/05-06 10 0 49 26 W 12 16 3 1 W39 192 W 12 1920 P 09/05-07 10 0 51 25 W 13 1 1321 W 18 33311 P 09/05-08 10 0 54 23 W 15 1 2450 W 24 64701 G 09/05-09 10 0 58 20 W 17 26 2 1 W36 3578 W 31 96091 G 09/05-10 10 0 63 17 W 18 1 6256 W 32 185783 E 09/05-11 10 0 67 15 W 21 1 8933 W 35 275475 E 09/05-12 28 0 69 13 W 22 33 3 1 W45 11611 W 36 365166 E 09/05-13 28 0 70 12 W 23 1 12292 W 36 384494 E 09/05-14 28 0 71 12 W 23 1 12974 W 36 403822 E 09/05-15 28 0 71 11 W 23 35 3 1 W47 13656 W 36 423150 E 09/05-16 28 0 70 11 W 23 1 13345 W 36 419080 E 09/05-17 28 0 70 11 W 23 1 13034 W 37 415010 E 09/05-18 44 0 68 12 W 22 33 3 1 W45 12724 W 37 410940 E 09/05-19 44 0 65 15 W 20 1 9577 W 37 306909 E 09/05-20 44 0 62 18 W 16 1 6429 W 36 202878 E 09/05-21 44 0 57 23 W 15 23 3 1 W44 3282 W 35 98846 G 09/05-22 44 0 53 28 W 16 1 2274 W 31 67695 G 09/05-23 44 0 51 33 W 17 1 1266 W 28 36543 P 09/06-00 40 0 49 37 W 20 30 3 1 SW48 259 W 24 5391 P 09/06-01 40 0 47 41 W 21 1 239 W 24 4966 P 09/06-02 40 0 46 42 W 23 1 219 W 24 4541 P 09/06-03 40 0 45 43 W 24 37 3 1 W56 199 W 24 4116 P 09/06-04 40 0 43 44 W 25 1 552 W 23 10701 P 09/06-05 40 0 42 44 W 25 1 905 W 23 17285 P 09/06-06 29 0 42 42 W 26 40 3 1 W58 1259 W 22 23870 P 09/06-07 29 0 45 37 W 28 1 3282 W 30 111426 V 09/06-08 29 0 47 32 W 29 1 5305 W 37 198983 E 09/06-09 29 0 50 27 W 30 45 4 1 W64 7328 W 45 286540 E 09/06-10 29 0 53 24 W 29 1 8496 W 48 360969 E 09/06-11 29 0 54 21 W 28 1 9662 W 51 435322 E 09/06-12 29 0 56 19 W 26 40 2 1 W78 10828 W 54 509676 E 09/06-13 29 0 57 18 W 26 1 9703 W 53 448313 E 09/06-14 29 0 57 16 W 25 1 8578 W 52 386950 E 09/06-15 29 0 58 15 W 25 38 4 1 NW67 7452 W 51 325587 E 09/06-16 29 0 57 15 W 24 1 7118 W 46 288441 E 09/06-17 29 0 57 15 W 22 1 6783 W 43 251295 E 09/06-18 6 0 56 15 W 21 31 4 1 W58 6449 W 38 214148 E 09/06-19 6 0 53 17 W 22 1 5731 W 36 179481 E 09/06-20 6 0 51 19 W 22 1 5014 W 32 144814 V 09/06-21 6 0 49 21 W 23 35 3 1 W52 4297 W 30 110146 V 09/06-22 6 0 48 22 W 22 1 3791 W 26 89066 G 09/06-23 6 0 46 24 W 20 1 3285 W 23 67985 G 09/07-00 6 0 44 27 SW 18 28 3 1 W51 2780 W 20 46904 F 09/07-01 6 0 42 28 SW 18 1 2070 W 18 34214 P 09/07-02 6 0 41 28 SW 17 1 1361 W 17 21524 P 09/07-03 6 0 40 29 SW 17 26 3 1 W47 651 SW 16 8834 P 09/07-04 6 0 40 28 W 16 1 558 W 14 7156 P 09/07-05 6 0 40 29 W 15 1 465 W 13 5478 P 09/07-06 6 0 40 29 W 14 21 3 1 W47 372 W 12 3800 P 09/07-07 6 0 41 30 W 12 1 1135 W 13 14296 P 09/07-08 6 0 44 30 W 9 1 1899 W 14 24791 P 09/07-09 6 0 48 29 W 7 7 4 1 W44 2663 W 15 35287 P 09/07-10 6 0 52 28 SW 7 1 3639 W 17 57100 F 09/07-11 6 0 53 29 SW 8 1 4615 W 18 78913 G 09/07-12 34 0 55 30 SW 9 14 4 1 W45 5591 W 21 100726 V 09/07-13 34 0 56 30 SW 9 1 6153 W 21 110142 V 09/07-14 34 0 57 30 SW 10 1 6714 SW 21 119558 V 09/07-15 34 0 58 30 SW 10 16 2 1 W43 7276 SW 21 128975 V 09/07-16 34 0 58 31 SW 12 1 6962 SW 20 121694 V 09/07-17 34 0 57 32 SW 12 1 6648 SW 20 114414 V 09/07-18 34 0 57 33 SW 12 17 3 1 SW35 6333 SW 20 107133 V 09/07-19 34 0 55 37 SW 10 1 09/07-20 34 0 53 43 SW 8 1 09/07-21 34 0 51 48 SW 7 7 1 09/07-22 34 0 50 52 SW 8 1 09/07-23 34 0 49 57 SW 10 1 09/08-00 30 0 48 62 SW 12 17 1 09/08-01 30 0 46 65 SW 12 1 09/08-02 30 0 45 66 SW 12 1 09/08-03 30 0 45 65 S 12 17 1 09/08-04 30 0 44 64 S 13 1 09/08-05 30 0 44 63 S 14 1 09/08-06 30 0 44 62 S 15 23 1 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...WFO BOULDER REQUESTED BY...FIRE OPERATIONS REASON FOR REQUEST...WILDFIRE .TAG 20100904.COWCR.01/BOU