FNUS75 KBOU 251325 FWSBOU SPOT FORECAST FOR USA PRO CHALLENGE 2012 - STAGE 5 GOLDEN TO BOULDER ...COUNTY NATIONAL WEATHER SERVICE DENVER CO 725 AM MDT SAT AUG 25 2012 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A COLD FRONT BLEW BY THE BOULDER AREA JUST BEFORE SUNRISE THIS MORNING. IN ITS WAKE NORTHERLY WINDS OF 10 TO 15 MPH ALONG THE FRONT RANGE. BESIDES THE SHIFT TO NORTHERLY WINDS AND SLIGHTLY COOLER TEMPERATURES...A BANK OF LOW CLOUDS AND PATCHY DENSE FOG HAS MOVED SOUTH INTO NORTHEAST COLORADO IN THE PAST HOUR OR TWO. BELIEVE THE BULK OF THIS CLOUDINESS WILL PASS TO THE EAST OF THE BOULDER COUNTY AREA DURING THE NEXT 3-5 HOURS. HOWEVER...IT IS POSSIBLE THE BOULDER AREA COULD SEE THE WESTERN FRINGE OF THIS LOW CLOUD DECK BRUSHING THE AREA BETWEEN 7:30 AND 10 AM THIS MORNING. DO NOT ANTICIPATE ANY PRECIPITATION WITH THESE CLOUDS. BY EARLY AFTERNOON SHOULD SEE A BREAK IN THE CLOUDS...THEN A RETURN OF SCATTERED CLOUDS MAINLY OVER THE FOOTHILLS WITH AFTERNOON HEATING. CANNOT RULE OUT A STRAY WEAK THUNDERSTORM OVER THE FOOTHILLS... BUT CHANCES ARE ANY STORM DEVELOPMENT SHOULD REMAIN SOUTH OF INTERSTATE 70. BY EVENING SKIES WILL GRADUALLY IN THE BOULDER AREA. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........MOSTLY SUNNY UNTIL 0800...THEN PARTLY CLOUDY(30-50%) UNTIL 1300...THEN MOSTLY SUNNY UNTIL 1600...THEN PARTLY CLOUDY(30-40%) AGAIN. MAX TEMPERATURE.....81-84. MIN HUMIDITY........23%. 20-FOOT WINDS.......NORTHWEST WINDS AROUND 8 MPH UNTIL 1000...THEN EAST 5-8 MPH. TRANSPORT WINDS.....NORTH 8-12 MPH UNTIL 1200...THEN SOUTHWEST AROUND 4 MPH. MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0700...THEN 5600-6600 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 0900...THEN FAIR UNTIL 1000...THEN POOR. HAINES INDEX........4 LOW. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR. MIN TEMPERATURE.....57. MAX HUMIDITY........59%. 20-FOOT WINDS.......EAST WINDS 5-6 MPH UNTIL 2100...THEN DOWNSLOPE/DOWNVALLEY 2-8 MPH UNTIL 0300...THEN WEST 6-7 MPH. TRANSPORT WINDS.....SOUTH 4-8 MPH UNTIL 2400...THEN SOUTHWEST AROUND 4 MPH. MIXING HEIGHT.......4800-5600 FT AGL UNTIL 2000. BELOW 1000 FT AGL AFTER 2400. SMOKE DISPERSAL.....POOR. HAINES INDEX........3 VERY LOW. .SUNDAY... SKY/WEATHER.........MOSTLY SUNNY UNTIL 1200...THEN PARTLY CLOUDY. MAX TEMPERATURE.....91. MIN HUMIDITY........18%. 20-FOOT WINDS.......NORTHWEST WINDS 6-7 MPH UNTIL 0900...THEN UPSLOPE/UPVALLEY 4-10 MPH UNTIL 1200...THEN SOUTHEAST 5-6 MPH. TRANSPORT WINDS.....NORTHWEST 4-8 MPH. MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800. 12000-13000 FT AGL AFTER 1200. SMOKE DISPERSAL.....POOR UNTIL 1400...THEN FAIR UNTIL 1600...THEN POOR. HAINES INDEX........4 LOW. FIRE WEATHER TABLE FOR USA PRO CHALLENGE2012 - STAGE5 GOLDENTO BOULDER . +++ 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 WR AT 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 08/25-07 4 2 0 60 31 CALM 1 3 1 NW13 1352 N10 14330 P 08/25-08 8 2 0 64 27 NE 3 3 3 1 NW13 2544 N12 27288 P 08/25-09 11 2 0 69 24 N 5 5 2 1 NW12 3736 N13 40247 F 08/25-10 11 2 0 73 23 NE 3 3 2 1 NW10 4323 N 9 33877 P 08/25-11 6 2 0 76 25 NE 5 5 2 1 NW 9 4909 N 7 27507 P 08/25-12 18 7 1 78 27 E 5 5 2 1 W 9 5496 N 5 21138 P 08/25-13 7 7 1 80 26 SE 5 5 2 1 W14 6008 NW 3 17981 P 08/25-14 29 7 1 81 25 E 2 2 2 1 W18 6521 SW 2 14825 P 08/25-15 26 7 1 82 24 E 6 6 2 1 W22 7033 S 2 11669 P 08/25-16 23 7 1 82 23 E 5 5 2 1 W22 6584 S 3 20957 P 08/25-17 19 7 1 81 24 E 6 6 2 1 W20 6135 S 6 30244 P 08/25-18 22 4 1 80 25 E 6 6 2 1 W16 5686 S 8 39531 P 08/25-19 22 4 1 77 28 E 5 5 2 1 W15 4793 S 8 32832 P 08/25-20 22 4 1 74 32 SE 2 2 2 1 W14 3899 S 8 26133 P 08/25-21 15 4 1 71 36 CALM 1 2 1 W13 3005 S 7 19434 P 08/25-22 15 4 1 69 39 CALM 1 2 1 W13 2097 S 6 13122 P 08/25-23 15 4 1 67 43 CALM 1 2 1 W13 1189 S 3 6811 P 08/26-00 4 4 1 64 48 CALM 1 2 1 W13 281 S 2 500 P 08/26-01 4 4 1 62 53 SW 2 2 2 1 W12 237 S 2 507 P 08/26-02 4 4 1 60 57 W 3 3 2 1 W12 194 W 3 514 P 08/26-03 4 4 1 59 59 W 5 5 2 1 W10 150 W 3 521 P 08/26-04 4 4 1 58 58 W 6 6 3 1 W10 150 W 5 627 P 08/26-05 4 4 1 58 57 W 7 7 3 1 W 9 149 W 6 734 P 08/26-06 17 1 0 58 55 W 7 7 4 1 W 9 148 W 7 840 P 08/26-07 17 1 0 59 53 W 6 6 4 1 W 9 717 W 6 3139 P 08/26-08 17 1 0 66 42 NW 5 5 4 1 W 9 1286 NW 6 5437 P 08/26-09 17 1 0 73 34 NW 2 2 4 1 NW10 1856 NW 5 7736 P 08/26-10 17 1 0 79 29 N 2 2 3 1 W 6 4962 NW 3 16254 P 08/26-11 17 1 0 82 26 E 3 3 3 1 W 7 7944 NW 3 25384 P 08/26-12 30 1 0 85 23 E 5 5 2 1 W 8 10925 NW 3 34515 P 08/26-13 30 1 0 87 21 E 5 5 2 1 W 8 11739 NW 3 39138 P 08/26-14 30 8 2 89 20 SE 6 6 2 1 W 9 12554 W 3 43762 F 08/26-15 30 8 2 90 19 SE 6 6 2 1 NW 9 13368 W 5 48385 F 08/26-16 30 8 2 90 18 SE 6 6 3 1 NW 9 12808 W 3 39481 P 08/26-17 30 8 2 89 18 SE 6 6 3 1 NW 8 12247 W 2 30576 P 08/26-18 34 8 2 88 19 SE 6 6 4 1 NW 7 11687 W 2 21672 P 08/26-19 34 8 2 85 21 SE 6 6 4 1 NW 7 8826 W 6 26018 P 08/26-20 34 8 2 81 25 S 7 7 3 1 NW 7 5966 SW 9 30364 P 08/26-21 34 7 1 77 28 SW 7 7 3 1 W 7 3105 S13 34710 P 08/26-22 34 7 1 75 31 SW 7 7 3 1 W 7 2148 S12 23789 P 08/26-23 34 7 1 73 35 SW 6 6 3 1 W 6 1190 S10 12869 P 08/27-00 20 2 0 70 39 SW 6 6 3 1 W 6 233 S 9 1949 P 08/27-01 20 2 0 67 44 SW 7 7 3 1 W 6 200 SW 9 1653 P 08/27-02 20 2 0 65 47 W 8 8 3 1 W 6 166 W 9 1357 P 08/27-03 20 2 0 63 48 W 9 14 3 1 W 7 133 W 9 1061 P 08/27-04 20 2 0 63 49 W 9 14 3 1 W 7 140 W 8 1033 P 08/27-05 20 2 0 62 49 W 9 9 4 1 W 7 147 W 8 1005 P 08/27-06 20 2 0 63 49 W 8 8 4 1 W 7 154 W 7 977 P 08/27-07 20 2 0 64 46 W 7 7 4 1 W 7 518 W 6 2065 P 08/27-08 20 2 0 69 39 NW 5 5 4 1 NW 7 881 NW 5 3154 P 08/27-09 20 2 0 75 32 NW 3 3 4 1 NW 7 1244 NW 3 4242 P 08/27-10 20 2 0 80 27 N 3 3 4 1 NW 7 3622 N 5 13485 P 08/27-11 20 2 0 83 25 NE 3 3 4 1 N 6 5999 N 5 22728 P 08/27-12 29 3 1 86 23 E 5 5 4 1 N 6 8377 N 5 31971 P 08/27-13 29 3 1 88 22 E 5 5 4 1 N 5 9710 NE 3 28731 P 08/27-14 29 3 1 89 21 E 5 5 4 1 NE 3 11043 NE 2 25492 P 08/27-15 29 3 1 90 20 E 5 5 4 1 NE 3 12376 E 2 22253 P 08/27-16 29 3 1 90 20 SE 5 5 4 1 NE 2 11544 E 2 24875 P 08/27-17 29 3 1 89 21 SE 5 5 4 1 CALM 10711 SE 3 27498 P 08/27-18 41 4 1 88 22 SE 5 5 4 1 CALM 9879 S 3 30121 P 08/27-19 41 4 1 85 25 SE 5 5 4 1 CALM 6813 S 5 21484 P 08/27-20 41 4 1 81 29 S 5 5 3 1 CALM 3747 S 6 12847 P 08/27-21 41 4 1 78 32 S 5 5 3 1 S 2 681 S 7 4210 P 08/27-22 41 4 1 76 35 S 6 6 3 1 SW 5 518 S 7 3247 P 08/27-23 41 4 1 74 38 S 6 6 3 1 W 7 355 S 8 2284 P 08/28-00 27 4 1 70 43 SW 6 6 3 1 W 9 192 S 8 1321 P 08/28-01 27 4 1 68 48 SW 6 6 3 1 W 9 171 SW 8 1155 P 08/28-02 27 4 1 66 51 SW 6 6 3 1 W 9 151 SW 8 988 P 08/28-03 27 4 1 64 53 SW 7 7 3 1 W 8 130 SW 7 822 P 08/28-04 27 4 1 64 53 W 7 7 3 1 W 7 134 SW 7 810 P 08/28-05 27 4 1 63 54 W 7 7 3 1 W 6 138 W 7 798 P 08/28-06 25 6 1 64 53 W 7 7 3 1 W 5 142 W 7 786 P KEY: FORECAST - MONTH/DAY-HOUR OF FORECAST /24-HOUR CLOCK LOCAL TIME/ VALID AT SC - SKY COVER /PERCENT/ PP - PROBABILITY OF PRECIPITATION 0.01 INCH /PERCENT/ WR - PROBABILITY OF WETTING RAIN 0.1 INCH /PERCENT/ AT - 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...BAKER...WFO BOULDER REQUESTED BY...JAY STALNACKER REASON FOR REQUEST...SAR .TAG 20120825.USAPR.01/BOU