FNUS75 KBOU 211559 FWSBOU SPOT FORECAST FOR COW CREEK...NPS NATIONAL WEATHER SERVICE DENVER CO 959 AM MDT THU APR 21 2011 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...WEAK HIGH PRESSURE WILL BE OVER THE AREA TODAY. MOISTURE TRAPPED WEST OF THE MOUNTAINS WILL PRODUCE SCATTERED SNOW SHOWERS OVER WESTERN SLOPES. ALONG EASTERN SLOPES...SKIES SHOULD CONTINUE MOSTLY SUNNY UNTIL LATER AFTERNOON WHEN HIGH LEVEL MOISTURE WILL BEGIN INCREASING AGAIN FROM THE WEST. THE AIRMASS WILL REMAIN STABLE UNTIL LATE AFTERNOON. MODERATE WESTERLY WINDS ALOFT WILL CONTINUE THROUGH TONIGHT. COOLER AND BREEZY CONDITIONS ARE EXPECTED ON FRIDAY. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TODAY... SKY/WEATHER.........MOSTLY SUNNY UNTIL 1400...THEN PARTLY CLOUDY(40-50%). MAX TEMPERATURE.....50-55. MIN HUMIDITY........32-38%. 20-FOOT WINDS.......WEST WINDS 12-22 MPH. TRANSPORT WINDS.....WEST 24-32 MPH UNTIL 1200...THEN 37-48 MPH. MIXING HEIGHT.......5800-6800 FT AGL. SMOKE DISPERSAL.....VERY GOOD UNTIL 1000. EXCELLENT AFTER 1500. HAINES INDEX........4 LOW. .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED THUNDERSTORMS UNTIL 2300...THEN CHANCE OF SNOW. MIN TEMPERATURE.....26-30. MAX HUMIDITY........78-86%. 20-FOOT WINDS.......BREEZY. WEST WINDS 17-27 MPH UNTIL 2400...THEN 13-23 MPH WITH GUSTS TO 30 MPH. TRANSPORT WINDS.....WEST 32-52 MPH. MIXING HEIGHT.......4400-5400 FT AGL UNTIL 2100...THEN 3200-3800 FT AGL. SMOKE DISPERSAL.....EXCELLENT UNTIL 2100...THEN VERY GOOD UNTIL 2300...THEN GOOD UNTIL 0200...THEN VERY GOOD UNTIL 0400...THEN EXCELLENT. HAINES INDEX........2 VERY LOW. .FRIDAY... SKY/WEATHER.........PARTLY CLOUDY(50-60%). MAX TEMPERATURE.....43-48. MIN HUMIDITY........26-34%. 20-FOOT WINDS.......BREEZY. WEST WINDS 18-28 MPH. GUSTS UP TO 35 MPH. TRANSPORT WINDS.....WEST 53-64 MPH. MIXING HEIGHT.......5200-6200 FT AGL UNTIL 1100...THEN 8600-9600 FT AGL. SMOKE DISPERSAL.....EXCELLENT. HAINES INDEX........4 LOW. .FORECAST DAYS 3 THROUGH 5... .SATURDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS UNTIL 0600...THEN CHANCE OF SNOW SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 40S. SOUTH WINDS AROUND 6 MPH. .SUNDAY...MOSTLY CLOUDY. CHANCE OF SNOW SHOWERS UNTIL 1200...THEN CHANCE OF RAIN SHOWERS. LOWS IN THE UPPER 20S. HIGHS AROUND 50. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .MONDAY...MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND SNOW SHOWERS UNTIL 1800...THEN SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 40S. WEST WINDS AROUND 11 MPH WITH GUSTS TO 25 MPH. FIRE WEATHER TABLE FOR COW CREEK. +++ 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 04/21-09 5 0 39 67 NW 8 8 2 1 W43 5121 W 23 101169 V 04/21-10 5 0 42 56 NW 9 1 5248 W 28 129772 V 04/21-11 8 0 45 47 W 12 1 5376 W 33 158375 E 04/21-12 8 0 47 42 W 13 17 4 1 W49 5503 W 39 186979 E 04/21-13 8 0 49 39 W 14 1 6056 W 40 214475 E 04/21-14 44 0 50 37 W 15 1 6609 W 41 241972 E 04/21-15 44 0 51 36 W 16 23 2 1 W52 7162 W 44 269469 E 04/21-16 44 0 51 36 W 18 1 6645 W 43 248745 E 04/21-17 44 0 50 38 W 21 1 6128 SW 43 228021 E 04/21-18 44 47 48 42 W 23 32 2 4 SW49 5611 SW 43 207297 E 04/21-19 98 47 46 46 W 24 4 4922 SW 44 184170 E 04/21-20 98 47 42 54 W 24 4 4233 W 44 161042 E 04/21-21 98 47 39 65 W 22 31 2 4 SW71 3544 W 45 137914 V 04/21-22 98 47 36 73 W 16 4 3435 W 39 118805 V 04/21-23 98 39 34 78 W 10 1 3327 W 35 99696 G 04/22-00 70 39 33 81 W 7 7 2 1 SW60 3218 W 29 80588 G 04/22-01 70 39 32 81 W 10 1 3320 W 33 97411 G 04/22-02 70 39 31 78 W 16 1 3422 W 38 114233 V 04/22-03 70 39 30 74 W 21 29 2 1 W74 3525 W 43 131056 V 04/22-04 70 39 30 68 W 21 1 3694 W 48 158005 E 04/22-05 70 39 30 61 W 18 1 3864 W 54 184953 E 04/22-06 50 5 28 60 W 17 24 4 1 W69 4034 W 61 211901 E 04/22-07 50 5 29 57 W 18 1 4530 W 61 238382 E 04/22-08 50 5 32 50 W 21 1 5025 W 61 264862 E 04/22-09 50 5 36 42 W 23 32 4 1 W53 5520 W 61 291343 E 04/22-10 50 5 41 35 W 24 1 6758 W 59 337437 E 04/22-11 50 5 43 31 W 25 1 7995 W 56 383530 E 04/22-12 50 5 45 29 W 26 37 3 1 W60 9232 W 54 429624 E 04/22-13 50 5 45 29 W 26 1 9461 W 54 448662 E 04/22-14 50 5 44 30 W 26 1 9690 W 55 467699 E 04/22-15 50 5 45 29 W 26 37 3 1 W70 9918 W 56 486737 E 04/22-16 50 5 45 28 W 25 1 9021 W 58 447309 E 04/22-17 50 5 44 29 W 24 1 8124 W 58 407882 E 04/22-18 59 24 41 33 W 22 31 3 1 W79 7227 W 59 368455 E 04/22-19 59 24 38 36 W 20 1 6207 W 60 319072 E 04/22-20 59 24 34 42 W 18 1 5187 W 60 269690 E 04/22-21 59 24 33 43 W 16 23 4 1 W75 4168 W 61 220307 E 04/22-22 59 24 32 45 W 13 1 4991 W 53 230518 E 04/22-23 59 24 31 46 W 9 1 4867 W 53 222150 E 04/23-00 70 24 32 45 W 7 7 3 1 W76 4742 W 52 213782 E 04/23-01 70 24 31 46 W 7 1 4649 W 47 191362 E 04/23-02 70 24 29 50 W 7 1 4556 W 43 168942 E 04/23-03 70 24 29 51 W 7 7 3 1 W73 4463 W 38 146521 V 04/23-04 70 24 28 52 W 6 1 4455 W 33 129551 V 04/23-05 70 24 28 54 SW 5 1 4447 W 29 112580 V 04/23-06 70 24 27 56 SW 3 3 2 1 W64 4438 W 25 95609 G 04/23-07 70 24 28 59 S 3 1 4721 W 24 97779 G 04/23-08 70 24 30 58 SE 5 1 5003 W 23 99949 G 04/23-09 70 24 33 55 SE 6 6 2 1 W55 5286 W 22 102119 V 04/23-10 70 24 36 52 SE 7 1 5910 W 24 124565 V 04/23-11 70 24 38 52 SE 7 1 6533 W 25 147011 V 04/23-12 67 24 39 50 SE 8 8 2 1 W55 7157 W 28 169457 E 04/23-13 67 24 39 52 SE 9 1 6957 W 25 153660 E 04/23-14 67 24 38 54 SE 9 1 6758 W 23 137863 V 04/23-15 67 24 38 52 SE 9 9 2 1 W55 6559 SW 22 122066 V 04/23-16 67 24 39 49 SE 8 1 6129 SW 22 114612 V 04/23-17 67 24 38 50 S 7 1 5700 SW 22 107158 V 04/23-18 63 28 39 48 S 6 6 2 1 W52 5271 SW 22 99704 G 04/23-19 63 28 38 50 S 6 1 4842 SW 20 84840 G 04/23-20 63 28 36 53 SE 6 1 4413 SW 18 69976 G 04/23-21 63 28 34 57 SE 6 6 2 1 SW53 3984 SW 16 55113 F 04/23-22 63 28 33 60 S 6 1 3593 SW 17 52445 F 04/23-23 63 28 32 62 S 5 1 3203 SW 18 49778 F 04/24-00 67 28 31 65 S 5 5 2 1 W60 2812 SW 20 47110 F 04/24-01 67 28 31 68 S 5 1 2602 SW 17 40835 F 04/24-02 67 28 30 71 SW 3 1 2392 SW 16 34561 P 04/24-03 67 28 30 75 SW 3 3 2 1 W64 2183 SW 15 28286 P 04/24-04 67 28 29 78 SW 3 1 1882 SW 14 22806 P 04/24-05 67 28 29 81 W 2 1 1581 SW 12 17326 P 04/24-06 70 38 30 83 W 2 2 2 1 W46 1280 SW 10 11846 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...MARK MAGNUSON REASON FOR REQUEST...SAR .TAG 20110421.COWCR.01/BOU