FNUS75 KBOU 211245 FWSBOU SPOT FORECAST FOR PHANTOM CANYON UNIT 2 3 BLACKLINING...NATURE CONSERVANCY NATIONAL WEATHER SERVICE DENVER CO 645 AM MDT WED APR 21 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A COOL...MOIST AND STABLE AIRMASS WILL REMAIN IN PLACE OVER NORTHERN COLORADO FOR THE NEXT SEVERAL DAYS. WITH A LOW PRESSURE AREA OVER THE GREAT BASIN AND HIGHER PRESSURE OVER EASTERN COLORADO AND THE PLAINS...MOIST SOUTHEASTERLY FLOW WILL CONTINUE OVER THE REGION. AN UPPER LEVEL LOW APPROACHING THE STATE FROM THE WEST WILL INCREASE SOUTHERLY FLOW ALOFT AND CAUSE SOME DESTABILIZATION ALOFT WITH AFTERNOON SHOWERS AND A FEW EMBEDDED THUNDERSTORMS. UNSETTLED WEATHER IS EXPECTED TO CONTINUE THROUGH FRIDAY. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........CLOUDY. CHANCE OF THUNDERSTORMS AFTER 1200. MAX TEMPERATURE.....50-56. MIN HUMIDITY........58-66%. WIND (20 FT)........UPSLOPE/UPVALLEY 4-10 MPH UNTIL 0900...THEN SOUTHEAST 13-19 MPH. TRANSPORT WINDS.....LIGHT WINDS UNTIL 1200...THEN SOUTH 12-16 MPH. MIXING HEIGHT.......500-1000 FT AGL UNTIL 1300...THEN 3500-4000 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 1300. GOOD AFTER 1500. HAINES INDEX........3 VERY LOW. .TONIGHT... SKY/WEATHER.........CLOUDY. CHANCE OF THUNDERSTORMS UNTIL 2100...THEN SCATTERED RAIN SHOWERS AND ISOLATED THUNDERSTORMS. MIN TEMPERATURE.....38-44. MAX HUMIDITY........85-95%. WIND (20 FT)........EAST WINDS 10-20 MPH WITH GUSTS TO AROUND 30 MPH UNTIL 0300...THEN 8-14 MPH. TRANSPORT WINDS.....SOUTHEAST 12-20 MPH. MIXING HEIGHT.......3000-4000 FT AGL UNTIL 2100...THEN 1000-1500 FT AGL. SMOKE DISPERSAL.....FAIR UNTIL 2200...THEN POOR. HAINES INDEX........2 VERY LOW. .THURSDAY... SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS. MAX TEMPERATURE.....50-56. MIN HUMIDITY........52-58%. WIND (20 FT)........SOUTHEAST WINDS 12-18 MPH UNTIL 1500...THEN NORTHEAST 12-16 MPH. TRANSPORT WINDS.....SOUTH 14-24 MPH. MIXING HEIGHT.......500-1000 FT AGL UNTIL 1000 THEN 4000-5000 FT AGL. SMOKE DISPERSAL.....FAIR UNTIL 1000...THEN GOOD UNTIL 1400...THEN FAIR UNTIL 1500...THEN POOR. HAINES INDEX........2 VERY LOW. .FORECAST DAYS 3 THROUGH 5... .FRIDAY...CHANCE OF RAIN SHOWERS UNTIL 1800...THEN RAIN AND SNOW LIKELY. LOWS IN THE MID 30S. HIGHS IN THE UPPER 40S. WEST WINDS AROUND 18 MPH WITH GUSTS TO AROUND 35 MPH. .SATURDAY...RAIN AND SNOW LIKELY UNTIL 0600...THEN CHANCE OF RAIN AND SNOW UNTIL 1800...THEN SLIGHT CHANCE OF RAIN AND SNOW. LOWS IN THE MID 30S. HIGHS IN THE MID 40S. NORTHWEST WINDS AROUND 18 MPH WITH GUSTS TO AROUND 45 MPH. .SUNDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN AFTER 1800. LOWS IN THE MID 30S. HIGHS AROUND 50. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. EXPERIMENTAL FIRE WEATHER TABLE FOR PHANTOM CANYON UNIT 2 3 BLACKLINING. +++ 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 04/21-06 93 0 41 84 SW 3 3 3 1 NW20 1045 S 6 5021 P 04/21-07 93 0 42 83 S 3 1 1215 S 6 5612 P 04/21-08 92 0 43 81 S 3 1 1386 S 6 6203 P 04/21-09 92 0 45 76 SE 5 5 2 1 NW12 1557 S 5 6794 P 04/21-10 92 0 47 70 SE 7 1 2257 S 7 16750 P 04/21-11 91 0 49 66 SE 10 1 2958 S 9 26706 P 04/21-12 89 30 51 63 SE 13 13 2 4 W 7 3659 S 12 36662 P 04/21-13 90 30 52 62 SE 14 4 4083 S 13 44952 F 04/21-14 92 30 53 62 SE 15 4 4508 S 14 53241 F 04/21-15 93 30 53 62 SE 15 15 2 4 SW14 4932 S 14 61530 G 04/21-16 94 30 53 62 SE 15 4 4819 S 15 61149 G 04/21-17 96 30 53 63 SE 16 4 4707 S 15 60769 G 04/21-18 96 30 52 65 SE 16 16 2 4 SW18 4594 S 15 60388 G 04/21-19 96 30 51 68 SE 17 4 3956 S 17 56458 F 04/21-20 96 30 49 73 SE 18 4 3319 SE 18 52529 F 04/21-21 96 40 47 80 SE 18 28 2 2 SW13 2681 SE 21 48599 F 04/21-22 96 40 45 85 SE 18 2 2291 SE 21 41832 F 04/21-23 96 40 44 87 SE 18 2 1901 SE 22 35065 P 04/22-00 96 40 44 89 SE 16 16 2 2 S15 1510 SE 22 28298 P 04/22-01 96 40 43 90 E 12 2 1150 SE 20 20616 P 04/22-02 96 40 42 90 E 7 2 790 SE 16 12934 P 04/22-03 96 40 42 89 NE 3 3 2 2 S16 430 SE 14 5251 P 04/22-04 92 40 42 89 E 6 2 929 SE 17 15968 P 04/22-05 84 40 42 88 E 10 2 1428 SE 20 26684 P 04/22-06 80 30 42 86 SE 14 14 2 1 S29 1927 SE 22 37400 P 04/22-07 80 30 43 83 SE 15 1 2319 SE 23 45725 F 04/22-08 80 30 44 79 SE 14 1 2712 SE 23 54051 F 04/22-09 80 30 46 73 SE 13 13 2 1 S25 3105 SE 23 62376 G 04/22-10 80 30 49 64 SE 13 1 3699 SE 23 71723 G 04/22-11 80 30 50 61 SE 13 1 4293 SE 22 80964 G 04/22-12 73 47 51 58 SE 13 13 2 1 S23 4887 SE 21 90205 G 04/22-13 73 47 52 56 SE 13 1 5023 SE 17 73644 G 04/22-14 73 47 53 55 E 13 1 5159 S 13 57083 F 04/22-15 73 47 53 54 NE 13 13 2 1 S25 5295 S 9 40522 F 04/22-16 73 47 53 54 NE 14 1 5217 S 7 33330 P 04/22-17 73 47 53 55 N 14 1 5139 SW 6 26138 P 04/22-18 73 47 52 57 N 14 22 2 1 SE22 5061 W 5 18945 P 04/22-19 73 47 50 59 N 14 1 4906 W 7 29315 P 04/22-20 73 47 47 63 NW 14 1 4751 NW 10 39684 P 04/22-21 73 47 45 64 NW 14 14 2 1 SW 8 4596 NW 13 50053 F 04/22-22 73 47 43 64 NW 14 1 3766 NW 17 49807 F 04/22-23 73 47 42 63 NW 14 1 2937 NW 22 49561 F 04/23-00 86 30 40 65 NW 14 22 2 1 N 6 2108 NW 26 49315 F 04/23-01 86 30 40 65 NW 15 1 1854 W 29 45555 F 04/23-02 86 30 39 65 W 16 1 1600 W 31 41795 F 04/23-03 86 30 38 67 W 17 28 2 1 N12 1347 W 32 38035 P 04/23-04 86 30 38 66 W 18 1 1469 W 36 45666 F 04/23-05 86 30 38 68 W 20 1 1591 W 38 53298 F 04/23-06 86 48 37 68 W 21 33 2 1 N16 1713 W 41 60930 G 04/23-07 86 48 38 67 W 21 1 2644 W 37 79623 G 04/23-08 86 48 40 61 W 21 1 3575 W 33 98316 G 04/23-09 86 48 43 54 W 20 31 2 1 NW 7 4506 W 30 117009 V 04/23-10 86 48 44 51 W 18 1 4670 W 29 115498 V 04/23-11 86 48 45 50 W 18 1 4834 W 28 113987 V 04/23-12 98 48 46 49 W 17 28 2 1 W 5 4998 W 26 112475 V 04/23-13 98 48 46 47 W 17 1 4985 W 28 120502 V 04/23-14 98 48 47 47 W 16 1 4973 W 30 128529 V 04/23-15 98 48 47 48 W 16 25 2 1 NW 9 4961 W 32 136556 V 04/23-16 98 48 47 49 W 16 1 4985 W 33 142550 V 04/23-17 98 48 47 50 W 16 1 5010 NW 35 148543 V 04/23-18 98 64 46 52 NW 16 25 2 1 NW14 5034 NW 36 154537 E 04/23-19 98 64 45 56 NW 17 1 4890 NW 38 159646 E 04/23-20 98 64 42 61 NW 18 1 4745 NW 40 164755 E 04/23-21 98 64 41 65 NW 20 31 2 1 N39 4601 NW 43 169864 E 04/23-22 98 64 40 68 NW 21 1 4047 NW 44 151234 E 04/23-23 98 64 39 69 NW 22 1 3493 N 44 132604 V 04/24-00 98 64 38 73 NW 23 37 2 1 N33 2939 N 45 113974 V 04/24-01 98 64 37 74 NW 24 1 2878 N 46 114770 V 04/24-02 98 64 37 74 NW 25 1 2816 N 47 115565 V 04/24-03 98 64 36 75 NW 26 41 2 1 N22 2754 N 48 116361 V 04/24-04 98 64 36 73 NW 26 1 2917 N 48 123835 V 04/24-05 98 64 35 73 NW 26 1 3081 N 49 131309 V 04/24-06 73 52 35 72 NW 26 43 2 1 NW16 3245 N 49 138783 V 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...ERICK STAHLIN REASON FOR REQUEST...PRESCRIBED .TAG 20100420.PHANT.02/BOU