FNUS75 KBOU 171755 FWSBOU SPOT FORECAST FOR CHASM MEADOW PROJECT...NPS NATIONAL WEATHER SERVICE DENVER CO 1150 AM MDT THU SEP 17 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...HIGH PRESSURE WILL BE OVER THE AREA THROUGH FRIDAY WITH LIGHT WINDS ALOFT. AS A RESULT...THE TYPICAL DIURNAL SURFACE WIND PATTERN WILL EXIST...THOUGH THE WINDS WILL FAVOR AN EASTERLY DIRECTION DURING THE AFTERNOON. THE AIRMASS WILL BE DRY...THOUGH THERE WILL BE ENOUGH MOISTURE FOR AFTERNOON BUILDUPS. NO PRECIPITATION IS EXPECTED. THE DRY AIRMASS WILL ALLOW FOR TEMPERATURES OVERNIGHT TO DROP INTO THE MID 30S. HIGH PRESSURE WILL PERSIST THROUGH THE WEEKEND WITH MAINLY DRY CONDITIONS CONTINUING. THE MOISTURE WILL GRADUALLY INCREASE SATURDAY AND SUNDAY AHEAD OF AN APPROACHING UPPER LEVEL SYSTEM. THIS WILL PROVIDE FOR A SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS. COOLER AIR WILL MOVE INTO THE AREA SUNDAY NIGHT...WITH TEMPERATURES COLD ENOUGH FOR SNOW. COOLER CONDITIONS TO PERSIST ON MONDAY WITH A CHANCE FOR SHOWERS. WINDS ALOFT WILL INCREASE A BIT SUNDAY. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TODAY... SKY/WEATHER.........PARTLY CLOUDY (35%). MAX TEMPERATURE.....44-48. MIN HUMIDITY........48-52%. 20-FOOT WINDS.......EAST 6-12 MPH. TRANSPORT WINDS.....EAST 5-12 MPH. MIXING HEIGHT.......2000-2600 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR. MIN TEMPERATURE.....35-40. MAX HUMIDITY........65-70%. 20-FOOT WINDS.......SOUTHEAST 8-13 MPH...DECREASING TO 4-8 MPH AFTER 2200. TRANSPORT WINDS.....SOUTHEAST 4-8 MPH SHIFTING TO THE SOUTHWEST AFTER 2400. MIXING HEIGHT.......400-1400 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .FRIDAY... SKY/WEATHER.........MOSTLY SUNNY UNTIL 1400...THEN PARTLY CLOUDY(35-45%). MAX TEMPERATURE.....50-55. MIN HUMIDITY........40-45%. 20-FOOT WINDS.......EAST 8-14 MPH. TRANSPORT WINDS.....NORTHWEST 3-7 MPH UNTIL 1200...THEN EAST 5-12 MPH. MIXING HEIGHT.......2800-3800 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .FORECAST DAYS 3 THROUGH 5... .SATURDAY...PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS AFTER 1200. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 50S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .SUNDAY...PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS AFTER 1200. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 50S. WEST WINDS AROUND 12 MPH WITH GUSTS TO AROUND 25 MPH. .MONDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS UNTIL 1800. COLDER. LOWS IN THE MID 30S. HIGHS AROUND 40. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. EXPERIMENTAL FIRE WEATHER TABLE FOR CHASM MEADOW PROJECT. +++ 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 09/17-11 7 0 45 51 SE 7 1 1925 E 8 13853 P 09/17-12 31 3 46 52 E 9 9 4 1 E22 2394 E 8 17919 P 09/17-13 31 3 46 54 E 9 1 2476 E 9 18986 P 09/17-14 31 3 47 55 E 10 1 2558 E 9 20053 P 09/17-15 31 3 47 57 E 10 10 4 1 E14 2640 E 9 21120 P 09/17-16 31 3 47 57 E 10 1 2456 E 9 19722 P 09/17-17 31 3 46 58 E 10 1 2271 E 9 18323 P 09/17-18 19 3 46 57 SE 12 12 5 1 E 8 2087 E 9 16925 P 09/17-19 19 3 45 60 SE 9 1 1776 E 9 14224 P 09/17-20 19 3 43 63 SE 9 1 1466 SE 9 11523 P 09/17-21 19 3 43 64 SE 8 8 5 1 E 8 1155 SE 9 8822 P 09/17-22 19 0 42 64 SE 7 1 975 SE 7 6242 P 09/17-23 19 0 41 63 SE 5 1 796 SE 5 3661 P 09/18-00 5 0 40 63 S 2 2 6 1 E13 617 S 2 1081 P 09/18-01 5 0 40 61 S 2 1 488 S 2 842 P 09/18-02 5 0 39 59 CALM 1 359 SW 2 603 P 09/18-03 5 0 39 57 CALM 1 5 1 E14 230 W 2 364 P 09/18-04 5 0 39 56 CALM 1 221 CALM 301 P 09/18-05 5 0 39 54 NW 2 1 212 CALM 239 P 09/18-06 5 0 38 53 E 3 3 6 1 E16 197 CALM 172 P 09/18-07 5 0 39 52 E 2 1 365 CALM 314 P 09/18-08 5 0 40 51 CALM 1 533 CALM 457 P 09/18-09 5 0 42 48 CALM 1 6 1 E16 701 CALM 600 P 09/18-10 5 0 44 45 NE 2 1 1395 N 3 5809 P 09/18-11 5 0 47 42 E 6 1 2089 NE 5 11018 P 09/18-12 27 0 49 40 E 8 8 5 1 E15 2782 E 7 16227 P 09/18-13 27 3 50 40 E 10 1 3190 E 7 19462 P 09/18-14 38 3 51 40 E 12 1 3599 E 7 22696 P 09/18-15 38 3 52 42 E 13 20 5 1 E14 4007 E 7 25931 P 09/18-16 38 3 52 43 E 12 1 3867 E 7 24147 P 09/18-17 38 3 52 44 E 10 1 3726 E 7 22364 P 09/18-18 38 3 51 45 E 9 9 4 1 E 9 3586 E 7 20580 P 09/18-19 38 3 50 47 E 8 1 2899 E 7 17301 P 09/18-20 38 3 47 50 SE 8 1 2212 E 8 14023 P 09/18-21 28 0 45 52 SE 7 7 5 1 NE10 1525 SE 8 10744 P 09/18-22 28 0 43 53 SE 6 1 1176 SE 7 7811 P 09/18-23 28 0 42 53 S 6 1 826 S 6 4878 P 09/19-00 17 0 40 53 SW 6 6 6 1 E 9 476 SW 5 1945 P 09/19-01 17 0 40 53 SW 7 1 384 SW 6 1805 P 09/19-02 17 0 39 53 W 9 1 292 W 7 1666 P 09/19-03 17 0 38 53 W 10 10 6 1 E 3 200 W 9 1527 P 09/19-04 17 0 38 53 W 10 1 187 W 9 1458 P 09/19-05 17 0 38 54 W 10 1 174 W 9 1390 P 09/19-06 17 0 37 55 W 10 10 6 1 N 2 160 W 9 1322 P 09/19-07 17 0 38 54 W 9 1 357 W 9 2486 P 09/19-08 17 0 40 52 W 9 1 553 W 8 3651 P 09/19-09 17 0 42 49 W 8 8 6 1 N 5 750 W 7 4815 P 09/19-10 17 0 44 46 W 7 1 1643 NW 7 9444 P 09/19-11 38 0 47 43 W 6 1 2537 NW 7 14073 P 09/19-12 38 0 49 41 W 6 6 3 1 N 3 3431 NW 6 18701 P 09/19-13 58 20 50 41 W 6 3 5081 NW 7 28825 P 09/19-14 58 20 51 41 W 7 3 6730 W 7 38949 P 09/19-15 58 20 52 42 SW 7 7 4 3 NW 8 8380 W 7 49072 F 09/19-16 58 20 52 43 SW 6 3 7167 W 6 39840 P 09/19-17 58 20 51 44 S 6 3 5954 W 6 30609 P 09/19-18 58 20 51 46 S 5 5 4 3 NW10 4741 W 6 21377 P 09/19-19 58 20 49 48 S 5 3 3329 W 5 14968 P 09/19-20 58 20 47 51 S 6 3 1917 SW 5 8560 P 09/19-21 28 20 45 53 S 6 6 3 3 NW10 506 SW 5 2152 P 09/19-22 28 0 43 55 SW 6 1 392 SW 6 1709 P 09/19-23 28 0 42 56 SW 6 1 278 SW 6 1266 P 09/20-00 19 0 41 56 SW 6 6 3 1 NW 9 165 W 6 824 P 09/20-01 19 0 40 56 SW 7 1 169 W 7 1042 P 09/20-02 19 0 39 56 SW 8 1 174 W 8 1260 P 09/20-03 19 0 39 57 W 9 9 5 1 W 9 179 W 9 1478 P 09/20-04 19 0 38 57 W 12 1 177 W 12 1683 P 09/20-05 19 0 38 57 W 13 1 175 W 13 1888 P 09/20-06 19 0 38 57 W 14 21 4 1 W13 174 W 14 2093 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 $$ FORECASTER...LESZCYNSKI...WFO BOULDER REQUESTED BY...DISPATCH REASON FOR REQUEST...HAZMAT .TAG 20090917.CHASM.01/BOU