FNUS73 KPAH 090051 FWSPAH SPOT FORECAST FOR BLAIR CREEK...USFS NATIONAL WEATHER SERVICE PADUCAH KY 751 PM CDT THU APR 8 2010 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 09. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... TWO BROAD AREAS OF SURFACE HIGH PRESSURE...ONE LOCATED OVER THE SOUTHEAST UNITED STATES AND THE OTHER SPREAD ACROSS THE GULF COAST AND MIDDLE ATLANTIC STATES...WILL HAVE A GREAT INFLUENCE ON FIRE WEATHER PARAMETERS IN THE HEARTLAND THROUGH THE MIDDLE OF NEXT WEEK. INITIALLY...THE COOL AND DRY AIR BEHIND THE COLD FRONT THAT MOVED THROUGH THE HEARTLAND WEDNESDAY NIGHT...WILL SETTLE ACROSS THE AREA TONIGHT AND EARLY FRIDAY. THIS WILL LEAD TO THE DEVELOPMENT OF FROST ACROSS THE AREA OVERNIGHT... WITH THE GREATEST COVERAGE OVER SOUTHEAST MISSOURI AND SOUTHWEST ILLINOIS. ONCE THE FROST EVAPORATES EARLY FRIDAY MORNING...ABUNDANT SUNSHINE WILL HEAT UP THE SURFACE...LEADING TO LOWER HUMIDITIES ACROSS THE HEARTLAND THROUGHOUT THE DAY. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT). AREAS OF FROST AFTER MIDNIGHT. MIN TEMPERATURE.....37. MAX HUMIDITY........73 PERCENT. WIND (20 FT)........NORTHWEST WINDS 5 TO 6 MPH EARLY IN THE EVENING BECOMING LIGHT. CWR.................0 PERCENT. HAINES INDEX........4 TO 5 OR OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4200-6000 FT AGL DECREASING TO 1200-1400 FT AGL. TRANSPORT WINDS.....WEST 15 TO 21 MPH BECOMING SOUTH 0 TO 7 MPH EARLY IN THE EVENING. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........MCLEAR CLEAR CLEAR CLEAR CLEAR CLEAR WEATHER COV..... AREAS AREAS WEATHER TYPE....NONE NONE NONE NONE FROST FROST TEMP............54 48 45 42 41 40 RH..............42 51 54 60 63 65 20 FT WIND......NW 5 NW 2 W 1 W 1 W 1 W 1 20 FT WIND GUST.10 5 MIX HGT (FT)....6000 4900 3200 1400 1200 1200 TRANSPORT WIND..NW 21 SW 7 S 0 S 0 S 0 S 0 CWR.............0 0 0 0 0 0 HAINES INDEX....4 5 5 5 5 5 .FRIDAY... SKY/WEATHER.........SUNNY (0-10 PERCENT). AREAS OF FROST EARLY IN THE MORNING. TEMPERATURE.........53 AT IGNITION...MAX 68. MIN HUMIDITY........43 PERCENT AT IGNITION...MIN 27 PERCENT. WIND (20 FT)........WINDS SOUTHWEST AT 2 MPH AT IGNITION...OTHERWISE BECOMING SOUTHWEST 5 TO 6 MPH LATE IN THE MORNING...THEN BECOMING LIGHT LATE IN THE AFTERNOON. CWR.................0 PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH AT IGNITION...MAX 4. MIXING HEIGHT.......3300 FT AGL AT IGNITION...INCREASING TO 6400 FT AGL. TRANSPORT WINDS.....WEST 0 TO 9 MPH INCREASING TO 13 TO 15 MPH IN THE LATE MORNING AND AFTERNOON. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........CLEAR CLEAR CLEAR CLEAR WEATHER COV.....AREAS WEATHER TYPE....FROST NONE NONE NONE TEMP............39 53 63 67 RH..............67 43 36 31 20 FT WIND......W 1 SW 2 W 5 SW 5 MIX HGT (FT)....1400 3300 4800 6400 TRANSPORT WIND..S 0 W 14 W 15 W 13 CWR.............0 0 0 0 HAINES INDEX....4 4 4 4 $$ FORECASTER...YORK REQUESTED BY...CHARLENE NAZARENKO TYPE OF REQUEST...PRESCRIBED .TAG 20100409.BLAIR.01/PAH