FNUS75 KBOU 082023 FWSBOU SPOT FORECAST FOR S ST VRAIN FIRE...COUNTY NATIONAL WEATHER SERVICE DENVER CO 223 PM MDT THU APR 8 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A FLAT RIDGE OF HIGH PRESSURE ALOFT IS MOVING OVER THE STATE TODAY BRINGING A WARMER AND DRIER AIRMASS. HIGH SURFACE PRESSURE OVER WESTERN COLORADO AND LOW PRESSURE OVER WYOMING IS INDUCE SOUTHERLY WINDS. THE PRESSURE GRADIENT WILL TIGHTEN LATER THIS AFTERNOON SWITCHING THE WINDS TO THE SOUTHWEST. HUMIDITY RECOVERIES TONIGHT WILL BE ABOUT 20% LESS THAN LAST NIGHT WITH THE DRIER AIRMASS. A COOL FRONT WILL BE MOVING SOUTH DOWN THE PLAINS TOMORROW MORNING TO SWITCHING WINDS TO BE OUT OF THE SOUTHEAST WITH SLIGHTLY HIGHER HUMIDITIES. A STRONGER COLD FRONT WILL BE MOVING DOWN INTO CENTRAL WYOMING TOMORROW INCREASING INSTABILITY SLIGHTLY IN THE AFTERNOON. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TODAY... SKY/WEATHER.........SUNNY. MAX TEMPERATURE.....57. MIN HUMIDITY........23%. WIND (20 FT)........SOUTHWEST WINDS 9-15 MPH. TRANSPORT WINDS.....WEST AROUND 12 MPH. MIXING HEIGHT.......5200-6000 FT AGL. SMOKE DISPERSAL.....FAIR. HAINES INDEX........2 VERY LOW. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR. MIN TEMPERATURE.....37. MAX HUMIDITY........41%. WIND (20 FT)........WEST WINDS 12-22 MPH WITH GUSTS TO AROUND 30 MPH. TRANSPORT WINDS.....WEST 12-20 MPH. MIXING HEIGHT.......3800-4800 FT AGL UNTIL 2000. SMOKE DISPERSAL.....FAIR UNTIL 1900...THEN POOR. HAINES INDEX........5 MODERATE. .FRIDAY... SKY/WEATHER.........MOSTLY SUNNY UNTIL 1200...THEN PARTLY CLOUDY. MAX TEMPERATURE.....56. MIN HUMIDITY........29%. WIND (20 FT)........UPSLOPE/UPVALLEY 4-10 MPH UNTIL 0900...THEN SOUTHEAST 8-14 MPH. TRANSPORT WINDS.....SOUTHWEST 12-20 MPH. MIXING HEIGHT.......5800-6800 FT AGL AFTER 1100. SMOKE DISPERSAL.....POOR UNTIL 1100. GOOD AFTER 1500. HAINES INDEX........3 VERY LOW. .FORECAST DAYS 3 THROUGH 5... .SATURDAY...PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 50S. NORTHEAST WINDS AROUND 8 MPH. .SUNDAY...MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE MID 60S. SOUTHWEST WINDS AROUND 8 MPH. .MONDAY...PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS AFTER 1200. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. SOUTHWEST WINDS AROUND 10 MPH WITH GUSTS TO AROUND 20 MPH. EXPERIMENTAL FIRE WEATHER TABLE FOR S ST VRAIN FIRE. +++ 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 04/08-14 5 0 55 26 SW 9 1 5687 W 10 53373 F 04/08-15 5 0 56 25 SW 10 10 2 1 W18 5954 SW 12 61964 G 04/08-16 5 0 57 23 SW 13 1 5600 W 12 58461 F 04/08-17 5 0 56 23 W 15 1 5246 W 12 54959 F 04/08-18 12 0 55 23 W 16 23 4 1 W20 4892 W 13 51457 F 04/08-19 12 0 53 25 W 17 1 3598 W 14 39634 P 04/08-20 12 0 49 28 W 17 1 2305 W 16 27810 P 04/08-21 12 0 48 29 W 17 24 5 1 NW20 1012 W 18 15987 P 04/08-22 12 0 46 30 W 18 1 783 W 20 12622 P 04/08-23 12 0 45 31 W 20 1 553 W 20 9257 P 04/09-00 12 0 43 34 W 20 28 4 1 NW12 324 W 21 5892 P 04/09-01 12 0 42 35 W 18 1 328 W 18 5300 P 04/09-02 12 0 40 37 W 17 1 333 W 16 4708 P 04/09-03 12 0 42 35 W 15 21 4 1 NW14 337 W 14 4117 P 04/09-04 12 0 41 36 W 12 1 313 W 12 3275 P 04/09-05 12 0 40 37 W 8 1 288 W 9 2433 P 04/09-06 20 0 38 40 W 6 6 3 1 W14 263 W 7 1591 P 04/09-07 20 0 39 41 SW 5 1 650 W 7 3708 P 04/09-08 20 0 41 41 S 5 1 1037 S 7 5825 P 04/09-09 20 0 44 40 SE 6 6 2 1 SW17 1424 S 7 7942 P 04/09-10 20 0 47 38 SE 7 1 2706 S 8 24544 P 04/09-11 20 0 50 36 SE 9 1 3988 S 10 41146 F 04/09-12 32 0 52 35 SE 10 10 2 1 SW26 5270 SW 13 57749 F 04/09-13 32 0 54 32 SE 12 1 5894 SW 15 76562 G 04/09-14 32 5 55 30 SE 13 1 6517 SW 16 95375 G 04/09-15 32 5 56 29 SE 13 17 2 1 SW35 7141 SW 18 114188 V 04/09-16 32 5 56 29 SE 12 1 6611 SW 17 101787 V 04/09-17 32 5 55 29 SE 10 1 6080 S 17 89386 G 04/09-18 35 1 54 31 SE 9 9 2 1 SW43 5549 S 16 76985 G 04/09-19 35 1 52 32 SE 7 1 4476 S 14 57226 F 04/09-20 35 1 50 34 S 6 1 3404 S 12 37466 P 04/09-21 35 1 48 37 S 5 5 3 1 W38 2331 S 9 17707 P 04/09-22 35 1 46 40 SW 5 1 1951 S 8 14279 P 04/09-23 35 1 45 44 W 6 1 1572 SW 8 10852 P 04/10-00 29 7 44 49 W 7 7 3 1 W31 1192 W 7 7424 P 04/10-01 29 7 43 51 NW 8 1 992 W 8 6388 P 04/10-02 29 7 42 52 NW 9 1 791 NW 8 5351 P 04/10-03 29 7 41 53 NW 10 10 3 1 W40 590 NW 8 4315 P 04/10-04 29 7 40 55 N 9 1 590 NW 7 3790 P 04/10-05 29 7 40 56 N 7 1 589 N 7 3265 P 04/10-06 52 0 40 56 N 6 6 3 1 W43 589 N 6 2740 P 04/10-07 52 0 40 56 NE 5 1 1215 NW 5 3764 P 04/10-08 52 0 41 54 E 5 1 1840 SW 3 4788 P 04/10-09 52 0 43 52 E 5 5 3 1 W44 2465 S 2 5812 P 04/10-10 52 0 45 48 E 6 1 3175 S 5 16289 P 04/10-11 52 0 48 44 E 8 1 3885 SW 7 26766 P 04/10-12 49 1 51 40 NE 9 9 3 1 W35 4594 SW 9 37243 P 04/10-13 49 1 53 37 E 9 1 4770 SW 10 41566 F 04/10-14 49 1 55 35 E 9 1 4945 SW 10 45890 F 04/10-15 49 1 56 34 E 9 9 3 1 W36 5120 SW 12 50214 F 04/10-16 49 1 56 34 E 9 1 5261 SW 12 51806 F 04/10-17 49 1 56 34 E 9 1 5402 S 12 53398 F 04/10-18 49 1 56 34 SE 9 9 3 1 SW35 5544 S 12 54990 F 04/10-19 49 1 53 37 SE 8 1 4417 S 12 43419 F 04/10-20 49 1 51 40 E 8 1 3291 SE 12 31848 P 04/10-21 43 0 49 42 E 7 7 3 1 SW38 2164 SE 10 20278 P 04/10-22 43 0 47 43 E 6 1 2077 SE 10 18064 P 04/10-23 43 0 46 43 E 5 1 1989 S 9 15851 P 04/11-00 18 0 45 43 E 3 3 2 1 SW33 1902 S 8 13637 P 04/11-01 18 0 44 44 NE 3 1 1584 SW 7 10241 P 04/11-02 18 0 43 44 NE 3 1 1266 SW 6 6845 P 04/11-03 18 0 43 44 N 3 3 3 1 W30 948 W 5 3449 P 04/11-04 18 0 42 44 NW 5 1 820 W 5 3352 P 04/11-05 18 0 41 44 NW 5 1 692 W 6 3256 P 04/11-06 40 0 41 43 W 6 6 4 1 W37 564 W 7 3159 P 04/11-07 40 0 42 43 W 7 1 580 W 7 3369 P 04/11-08 40 0 44 41 W 7 1 595 W 7 3579 P 04/11-09 40 0 46 39 W 8 8 4 1 W33 611 SW 7 3789 P 04/11-10 40 0 50 36 SW 9 1 1421 SW 9 13976 P 04/11-11 40 0 54 32 SW 10 1 2230 W 12 24162 P 04/11-12 7 0 58 29 SW 10 10 4 1 W18 3040 W 13 34348 P 04/11-13 7 0 61 25 SW 10 1 4833 W 12 45340 F 04/11-14 7 0 63 22 S 10 1 6625 W 10 56332 F 04/11-15 7 0 64 21 S 12 12 4 1 W 8 8418 SW 9 67324 G 04/11-16 7 0 64 21 S 10 1 7445 SW 8 55091 F 04/11-17 7 0 64 21 S 10 1 6472 SW 7 42858 F 04/11-18 22 5 63 22 SE 10 10 5 1 SW10 5500 S 7 30625 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...S ST VRAIN CMD REASON FOR REQUEST...WILDFIRE .TAG 20100408.SSTVR.01/BOU