FNUS75 KBOU 231102 FWSBOU SPOT FORECAST FOR ONAHU...NPS NATIONAL WEATHER SERVICE DENVER CO 502 AM MDT THU SEP 23 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...AN UPPER TROUGH OVERHEAD WILL BE MOVING EAST TODAY WITH THE UPPER RIDGE BUILDING BACK IN THROUGH THE WEEKEND. A FEW LIGHT SHOWERS WILL MOVE OVER THE FIRE THIS MORNING...BUT DRY AND SUBSIDENT AIR ON THE BACKSIDE OF THE TROUGH WILL QUICKLY DISSIPATE SHOWERS AND CLEAR SKIES FOR THE AFTERNOON. TEMPERATURES WILL BE SLIGHTLY WARMER THAN YESTERDAY WITH HUMIDITIES BOTTOMING OUT IN THE MID 20 PERCENT RANGE. WEST TO NORTHWESTERLY WINDS WILL INCREASE IN SPEED TODAY ON THE BACKSIDE OF THE TROUGH...AND THE SUBSIDENCE SHOULD PUSH THE WINDS DOWN OVER THE FIRE...ESPECIALLY DOWN INTO THE EAST TO WEST ALIGNED VALLEYS AND DRAINAGES TO THE WEST OF THE FIRE. FRIDAY WILL SEE WARMER AND DRIER CONDITIONS UNDER THE BUILDING RIDGE. A WEAK COLD FRONT WILL MOVE SOUTHWEST INTO NORTHEASTERN COLORADO SATURDAY MORNING WITH LITTLE TO NO PRECIPITATION EXPECTED. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........MOSTLY CLOUDY UNTIL 0900...THEN PARTLY CLOUDY(40-50%). SLIGHT CHANCE OF THUNDERSTORMS UNTIL 1200. MAX TEMPERATURE.....61. MIN HUMIDITY........25%. 20-FOOT WINDS.......BREEZY. WEST WINDS 15-25 MPH WITH GUSTS TO 35 MPH. TRANSPORT WINDS.....WEST 21-32 MPH UNTIL 1200...THEN 32-36 MPH. MIXING HEIGHT.......2400-3400 FT AGL UNTIL 1000...THEN 6800-7800 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 0700. EXCELLENT AFTER 1200. HAINES INDEX........2 VERY LOW. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR. MIN TEMPERATURE.....34. MAX HUMIDITY........59%. 20-FOOT WINDS.......WEST WINDS 11-17 MPH WITH GUSTS TO 30 MPH UNTIL 2400...THEN NORTHEAST 4-7 MPH. TRANSPORT WINDS.....WEST 20-28 MPH UNTIL 2400...THEN SOUTHWEST 8-12 MPH. MIXING HEIGHT.......5600-6600 FT AGL UNTIL 2000. BELOW 1000 FT AGL AFTER 2400. SMOKE DISPERSAL.....EXCELLENT UNTIL 1900. POOR AFTER 2400. HAINES INDEX........4 LOW. .FRIDAY... SKY/WEATHER.........SUNNY. MAX TEMPERATURE.....72. MIN HUMIDITY........16%. 20-FOOT WINDS.......WEST WINDS 9-15 MPH. TRANSPORT WINDS.....WEST 9-20 MPH UNTIL 1200...THEN 20-28 MPH. MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0700. 10400-11400 FT AGL AFTER 1500. SMOKE DISPERSAL.....POOR UNTIL 0900...THEN FAIR UNTIL 1000...THEN GOOD UNTIL 1100...THEN VERY GOOD UNTIL 1200...THEN EXCELLENT. HAINES INDEX........4 LOW. .FORECAST DAYS 3 THROUGH 5... .SATURDAY...CLEAR. LOWS IN THE LOWER 30S. HIGHS AROUND 70. WEST WINDS AROUND 6 MPH. .SUNDAY...CLEAR. LOWS IN THE LOWER 30S. HIGHS IN THE MID 70S. NORTH WINDS AROUND 5 MPH. .MONDAY...CLEAR. LOWS IN THE LOWER 30S. HIGHS IN THE MID 70S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. FIRE WEATHER TABLE FOR ONAHU. +++ 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 09/23-04 89 69 39 92 SW 8 1 1256 W 16 18652 P 09/23-05 89 69 39 89 W 9 1 1445 W 18 23727 P 09/23-06 64 24 40 84 W 10 10 2 2 SW49 1634 W 21 28803 P 09/23-07 64 24 41 83 W 12 2 2383 W 22 46628 F 09/23-08 64 24 41 84 W 13 2 3132 W 23 64453 G 09/23-09 52 24 43 81 W 14 22 2 2 W38 3880 W 24 82277 G 09/23-10 52 24 46 71 W 16 2 4909 W 28 123314 V 09/23-11 52 24 51 57 W 18 2 5937 W 31 164350 E 09/23-12 34 5 55 48 W 21 33 2 1 W44 6966 W 33 205386 E 09/23-13 34 5 57 41 W 22 1 7312 W 35 219708 E 09/23-14 34 5 59 36 W 23 1 7658 W 36 234029 E 09/23-15 34 5 60 33 W 23 37 2 1 W43 8005 W 36 248351 E 09/23-16 34 5 60 29 W 22 1 7537 W 35 224481 E 09/23-17 34 5 60 26 W 20 1 7070 W 32 200612 E 09/23-18 21 0 59 25 W 17 28 3 1 NW48 6602 W 31 176742 E 09/23-19 21 0 56 27 W 15 1 5591 W 28 141183 V 09/23-20 21 0 52 33 W 12 1 4580 W 25 105624 V 09/23-21 8 0 48 40 W 9 15 4 1 NW40 3569 W 23 70065 G 09/23-22 8 0 45 46 W 8 1 2663 W 20 49741 F 09/23-23 8 0 42 52 W 7 1 1757 W 16 29416 P 09/24-00 0 0 41 55 W 6 7 4 1 NW32 851 W 13 9092 P 09/24-01 0 0 39 58 W 4 1 685 W 12 6943 P 09/24-02 0 0 38 59 N 6 1 519 SW 10 4793 P 09/24-03 0 0 37 59 NE 5 6 3 1 W31 353 SW 8 2644 P 09/24-04 0 0 36 59 NE 6 1 336 SW 8 2402 P 09/24-05 0 0 35 59 NE 4 1 319 SW 8 2159 P 09/24-06 0 0 36 57 NE 4 6 4 1 W29 328 SW 7 2126 P 09/24-07 0 0 37 54 NE 6 1 1344 W 10 15537 P 09/24-08 0 0 45 41 NE 6 1 2360 W 13 28948 P 09/24-09 0 0 53 31 NE 7 7 4 1 W31 3375 W 15 42358 F 09/24-10 0 0 60 24 NW 8 1 5048 W 17 80484 G 09/24-11 0 0 64 21 W 10 1 6721 W 20 118609 V 09/24-12 1 0 67 19 W 12 18 4 1 W37 8393 W 22 156734 E 09/24-13 1 0 69 18 W 13 1 9480 W 23 192417 E 09/24-14 1 0 71 17 W 13 1 10566 W 24 228100 E 09/24-15 1 0 72 16 W 13 21 3 1 W40 11652 W 26 263783 E 09/24-16 1 0 71 17 W 12 1 10832 W 25 237619 E 09/24-17 1 0 68 18 W 10 1 10012 W 24 211456 E 09/24-18 1 0 67 18 W 9 15 3 1 W40 9191 W 23 185292 E 09/24-19 1 0 60 23 W 8 1 6716 W 20 129030 V 09/24-20 1 0 54 29 W 6 1 4240 W 15 72768 G 09/24-21 1 0 51 32 W 5 5 3 1 W38 1764 W 10 16506 P 09/24-22 1 0 48 36 W 5 1 1256 W 9 11506 P 09/24-23 1 0 46 39 W 5 1 747 W 8 6506 P 09/25-00 3 0 42 45 W 5 5 3 1 W40 239 W 7 1506 P 09/25-01 3 0 40 50 W 5 1 222 W 7 1332 P 09/25-02 3 0 37 54 W 5 1 205 W 7 1159 P 09/25-03 3 0 36 57 W 5 5 3 1 NW41 188 W 6 985 P 09/25-04 3 0 35 59 W 5 1 185 W 6 945 P 09/25-05 3 0 34 60 W 3 1 181 W 6 906 P 09/25-06 3 0 34 61 W 3 3 3 1 NW35 178 W 6 866 P 09/25-07 3 0 36 54 W 3 1 1127 W 8 12713 P 09/25-08 3 0 42 43 W 3 1 2076 W 12 24559 P 09/25-09 3 0 50 31 W 5 5 3 1 NW29 3025 W 14 36405 P 09/25-10 3 0 58 24 W 7 1 4429 W 15 62903 G 09/25-11 3 0 62 21 W 9 1 5833 NW 17 89402 G 09/25-12 5 0 65 18 W 10 16 3 1 NW30 7236 NW 18 115900 V 09/25-13 5 0 67 18 W 12 1 7639 NW 17 116533 V 09/25-14 5 0 68 17 W 10 1 8042 NW 17 117166 V 09/25-15 5 0 69 17 W 10 16 2 1 NW29 8445 NW 16 117798 V 09/25-16 5 0 68 18 W 10 1 7820 NW 15 100237 V 09/25-17 5 0 66 19 NW 9 1 7196 NW 13 82676 G 09/25-18 5 0 65 21 NW 8 13 2 1 N30 6571 NW 12 65114 G 09/25-19 5 0 58 27 NW 7 1 4523 NW 9 44049 F 09/25-20 5 0 52 33 N 5 1 2475 N 7 22983 P 09/25-21 5 0 49 37 N 3 3 2 1 N30 427 N 5 1918 P 09/25-22 5 0 46 41 N 2 1 353 N 3 1356 P 09/25-23 5 0 44 44 CALM 1 280 N 2 794 P 09/26-00 4 0 41 50 CALM 1 2 1 N28 207 CALM 233 P 09/26-01 4 0 38 54 NE 2 1 196 N 2 338 P 09/26-02 4 0 36 57 N 2 1 186 NW 2 444 P 09/26-03 4 0 35 59 NW 3 3 3 1 N26 176 NW 3 550 P 09/26-04 4 0 34 60 NW 3 1 171 NW 3 514 P 09/26-05 4 0 33 60 N 2 1 165 NW 3 479 P 09/26-06 4 0 33 60 N 2 2 3 1 N24 160 NW 3 443 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...WFO BOULDER REQUESTED BY...FIRE OPERATIONS REASON FOR REQUEST...WILDFIRE .TAG 20100922.ONAHU.01/BOU