FNUS75 KCYS 081357 FWSCYS SPOT FORECAST FOR ILLINOIS CREEK...USFS NATIONAL WEATHER SERVICE CHEYENNE WY 757 AM MDT WED SEP 8 2010 FORECAST IS BASED ON REQUEST TIME OF 0743 MDT ON SEPTEMBER 08. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... VERY WARM AND WINDY CONDITIONS WILL AFFECT MUCH OF THE DISTRICT THROUGH THURSDAY AHEAD OF A COLD FRONT. MOISTURE WILL CONTINUE TO INCREASE OVER THE DISTRICT TODAY AND IN MOST LOCATIONS ON THURSDAY...PRODUCING MINIMUM RELATIVE VALUES OF BETWEEN 17 AND 30 PERCENT. HOWEVER...DRIER AIR MAY SPREAD BACK INTO SOUTH CENTRAL WYOMING THURSDAY AFTERNOON. OVER THAT PART OF THE DISTRICT...NEAR RED FLAG CONDITIONS WILL BE POSSIBLE THURSDAY AFTERNOON. SOUTHERLY WINDS WILL GUST AS HIGH AS 35 MPH TODAY AND AGAIN THURSDAY OVER THE DISTRICT. BOTH DAYS...SCATTERED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED IN THE AFTERNOON AND EVENING HOURS...ESPECIALLY TODAY. THE COLD FRONT MOVES ACROSS THE DISTRICT THURSDAY NIGHT. BEHIND THE FRONT...NORTHWEST WINDS WILL GUST AS HIGH AS 40 MPH AND COOLER TEMPERATURES THROUGH FRIDAY. .TODAY... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT) THEN BECOMING MOSTLY CLOUDY (70-80 PERCENT). SCATTERED SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. TEMPERATURE.........46 AT REQUEST...MAX 66. RH..................67 PERCENT AT REQUEST...MIN 34 PERCENT. WIND (20 FT)........WINDS SOUTHWEST 5 TO 10 MPH INCREASING TO 16 TO 18 MPH WITH GUSTS TO AROUND 35 MPH. CWR.................0 PERCENT INCREASING TO 40 PERCENT IN THE AFTERNOON. LAL.................1 UNTIL 1200...THEN 3. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH AT REQUEST. MIXING HEIGHT.......6100-7700 FT AGL. TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH. SMOKE DISPERSAL.....GOOD TO EXCELLENT /152200 KNOT-FT/ INCREASING TO EXCELLENT (185100-192900 KNOT-FT) IN THE AFTERNOON. TIME (MDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM SKY (%).........54 54 54 74 74 74 WEATHER COV..... SCTTRD SCTTRD SCTTRD WEATHER TYPE....NONE NONE NONE RNSHWR RNSHWR RNSHWR TEMP............41 54 60 64 64 66 RH..............67 45 37 35 37 36 20 FT WIND......SW 8 SW 12 SW 14 SW 16 SW 17 SW 17 20 FT WIND GUST.20 25 30 35 35 35 HAINES INDEX....2 2 2 2 2 2 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING PARTLY CLOUDY (45-55 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. TEMPERATURE.........MIN 42. RH..................MAX 86 PERCENT. WIND (20 FT)........SOUTH WINDS 8 TO 17 MPH AND GUSTY IN THE EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH...THEN BECOMING SOUTHWEST AROUND 8 MPH EARLY IN THE MORNING. CWR.................40 PERCENT DECREASING TO 10 PERCENT AFTER MIDNIGHT. LAL.................3 UNTIL 2400...THEN 1. HAINES INDEX........2 TO 3 OR OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3900 FT AGL DECREASING TO 300 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....SOUTH 17 TO 26 MPH SHIFTING TO THE SOUTHWEST 13 TO 16 MPH LATE IN THE EVENING. SMOKE DISPERSAL.....GOOD (51200-90600 KNOT-FT) DECREASING TO POOR (3300-4200 KNOT-FT) AFTER MIDNIGHT. TIME (MDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........69 69 69 48 48 48 WEATHER COV.....CHANCE CHANCE CHANCE WEATHER TYPE....RNSHWR RNSHWR RNSHWR NONE NONE NONE TEMP............63 56 49 46 44 42 RH..............39 53 68 76 79 86 20 FT WIND......SW 14 SW 14 S 9 S 5 S 5 SW 6 20 FT WIND GUST.30 25 20 10 10 15 HAINES INDEX....3 3 3 2 2 2 .THURSDAY... SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. TEMPERATURE.........MAX 64. RH..................MIN 27 PERCENT. WIND (20 FT)........SOUTHWEST WINDS 10 TO 17 MPH. GUSTS UP TO 20 MPH INCREASING TO 30 MPH IN THE LATE MORNING AND AFTERNOON. CWR.................10 PERCENT INCREASING TO 30 PERCENT IN THE AFTERNOON. LAL.................1 UNTIL 1200...THEN 3. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3600 FT AGL INCREASING TO 7000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 17 TO 26 MPH. SMOKE DISPERSAL.....GOOD (53500-78400 KNOT-FT) INCREASING TO EXCELLENT (153400-160400 KNOT-FT) IN THE AFTERNOON. TIME (MDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........48 48 38 50 50 50 WEATHER COV..... CHANCE CHANCE CHANCE WEATHER TYPE....NONE NONE NONE RNSHWR RNSHWR RNSHWR TEMP............43 47 57 61 63 64 RH..............79 65 42 35 30 28 20 FT WIND......SW 10 SW 10 SW 13 SW 14 SW 14 SW 14 20 FT WIND GUST.20 20 25 30 30 30 HAINES INDEX....2 2 2 2 2 2 $$ FORECASTER...JAMSKI REQUESTED BY...BONENBERGER TYPE OF REQUEST...WILDFIRE .TAG 20100908.ILLIN.01/CYS