FNUS71 KCTP 251047 FWSCTP SPOT FORECAST FOR TUNNEL HILL...PA BUREAU OF FORESTRY NATIONAL WEATHER SERVICE STATE COLLEGE PA 647 AM EDT WED MAR 25 2009 FORECAST IS BASED ON REQUEST TIME OF 0627 EDT ON MARCH 25. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE IN STATE COLLEGE. .DISCUSSION... A RIDGE OF HIGH PRESSURE WILL SLIDE TO THE EAST OF THE DISTRICT TODAY ALLOWING AN INCREASING SOUTHERLY FLOW OR AIR TO DEVELOP. IN ADDITION...VERY DRY LOW AIR AND A BRIEF FEW HOUR PERIOD OF RELATIVE HUMIDITY IN THE 25 TO 35 PERCENT RANGE...WILL COMBINE WITH THE DRY FINE FUELS TO CREATE AN ELEVATED THREAT FOR WILDFIRE GROWTH AND SPREAD TODAY...MAINLY ACROSS THE HIGHER TERRAIN OF NORTHERN AND WESTERN PENNSYLVANIA DURING THE LATE MORNING HOURS. EAST TO SOUTHEAST WINDS OF 5 TO 10 MPH...WILL SHIFT TO THE SOUTHEAST AND INCREASE TO 10 TO 15 MPH LATE THIS MORNING. THE WIND WILL ALSO GUST BETWEEN 20 AND 25 MPH LATE THIS MORNING THROUGH THE EARLY AFTERNOON. LIGHT RAIN WILL MOVE INTO THE WESTERN MOUNTAINS LATER THIS AFTERNOON...AND OVERSPREAD THE REST OF CENTRAL PENNSYLVANIA AND THE SUSQUEHANNA VALLEY TONIGHT. STEADIER...RAIN WILL DEVELOP THURSDAY AFTERNOON INTO THURSDAY NIGHT AS A WAVE OF LOW PRESSURE MOVES NORTHEAST FROM THE TENNESSEE VALLEY. BETWEEN ONE QUARTER...AND ONE HALF OF AN INCH OF MUCH NEEDED RAINFALL IS LIKELY DURING THIS PERIOD. .TODAY... SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS LATE. MAX TEMPERATURE.....AROUND 50. MIN HUMIDITY........28 PERCENT. WIND (20 FT)........SOUTHEAST WINDS 5 TO 10 MPH. LAL.................NO TSTMS. MIXING WINDS........SOUTH 23 TO 32 MPH...DECREASING TO 22 TO 23 MPH EARLY IN THE AFTERNOON. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. CHANCE OF PCPN......10 PERCENT. TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).........70 75 78 81 87 93 99 100 97 100 100 100 WEATHER COV..... CHC CHC WEATHER TYPE.... RW RW TEMP............31 33 35 36 39 41 46 50 50 49 48 47 RH..............31 33 34 36 37 36 31 28 29 31 32 34 20 FT WIND DIR..E E E E SE SE SE SE SE SE SE SE 20 FT WIND SPD..4 5 5 5 6 6 7 7 7 7 8 8 20 FT WIND GUST.10 10 10 15 15 15 15 15 15 15 15 15 TRANSP WIND DIR.S S S S S S S S S S S S TRANSP WIND SPD.32 32 30 29 26 25 24 23 22 22 22 23 CHC OF PCPN (%).0 0 0 0 0 10 10 10 10 10 40 40 LAL.............1 1 1 1 1 1 1 1 1 1 1 1 HAINES INDEX....4 4 4 4 4 3 3 3 2 2 2 2 .TONIGHT... SKY/WEATHER.........CLOUDY. A CHANCE OF RAIN SHOWERS EARLY IN THE EVENING...THEN RAIN SHOWERS LIKELY EARLY IN THE EVENING. MIN TEMPERATURE.....AROUND 34. MAX HUMIDITY........86 PERCENT. WIND (20 FT)........SOUTHEAST WINDS 5 TO 9 MPH. LAL.................NO TSTMS. MIXING WINDS........SOUTH 21 TO 30 MPH...DECREASING TO 16 TO 20 MPH LATE. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. CHANCE OF PCPN......60 PERCENT. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........100 100 100 100 100 100 WEATHER COV.....CHANCE LIKELY LIKELY LIKELY LIKELY LIKELY WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR TEMP............45 43 41 39 38 36 RH..............38 45 52 60 70 77 20 FT WIND......SE 7 SE 6 SE 5 SE 5 SE 5 SE 4 20 FT WIND GUST.15 15 10 10 10 10 TRANSPORT WIND..S 25 S 30 S 30 S 26 S 21 S 17 CHC OF PCPN (%).40 60 60 60 60 60 LAL.............1 1 1 1 1 1 HAINES INDEX....2 2 2 2 2 2 .THURSDAY... LAL.................NO TSTMS. MIXING WINDS........SOUTHEAST 6 TO 15 MPH...DECREASING TO 3 TO 5 MPH LATE. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. CHANCE OF PCPN......60 PERCENT. TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM TRANSPORT WIND..S 15 S 14 S 10 S 8 SE 7 SE 5 CHC OF PCPN (%).60 50 50 50 70 70 LAL.............1 1 1 1 1 1 HAINES INDEX....2 2 2 2 2 2 $$ FORECASTER...WFO CTP/LAMBERT REQUESTED BY...JOE KELLERT TYPE OF REQUEST...WILDFIRE .TAG 20090325.TUNNE.01/CTP