FNUS71 KBGM 172100 FWSBGM SPOT FORECAST FOR SNYDER...NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE BINGHAMTON, NY 500 PM EDT WED APR 17 2013 FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON APRIL 18. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... HIGH PRESSURE OVER EASTERN CANADA WILL SHIFT OFF TO THE NORTHEAST TONIGHT ALLOWING SOUTHEASTERLY ONSHORE FLOW TO DEVELOP BY THURSDAY MORNING IN THE AREA. THIS WILL ALLOW RELATIVE HUMIDITIES TO REMAIN HIGH ON THURSDAY, GENERALLY AROUND 40%. WINDS WILL INCREASE DURING THE DAY WITH GUSTS APPROACHING 20-25 MPH DURING THE AFTERNOON, THOUGH AT THAT ELEVATION THEY MAY BE A LITTLE LESS THAN FORECAST. PATCHY DRIZZLE EXPECTED TO DEVELOP AFTER 3 PM TOMORROW AND CONTINUE THROUGH THURSDAY NIGHT. RELATIVE HUMIDITIES WILL CONTINUE TO RISE THROUGH THE DAY FRIDAY, AHEAD OF A STRONG COLD FRONT ON SOUTHERLY WINDS. SCATTERED SHOWERS EXPECTED TO DEVELOP LATE FRIDAY AFTERNOON AND CONTINUE FRIDAY NIGHT ALONG WITH A CHANCE OF THUNDERSTORMS. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT). MIN TEMPERATURE.....AROUND 38. MAX HUMIDITY........89 PERCENT. WIND (20 FT)........ SLOPE/VALLEY.......NORTHEAST WINDS 5 TO 9 MPH IN THE EVENING...BECOMING LIGHT. MIXING HEIGHT.......4300 FT AGL...DECREASING TO 300 FT AGL EARLY IN THE EVENING. TRANSPORT WINDS.....NORTHEAST 8 TO 9 MPH...BECOMING SOUTHEAST 12 TO 21 MPH LATE IN THE EVENING. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).............5 5 7 7 2 16 WEATHER COV......... WEATHER TYPE........NONE NONE NONE NONE NONE NONE TSTM COV............ TEMP................60 55 48 43 39 38 RH..................36 47 63 76 85 85 20 FT WIND..........N 6 N 5 NE 4 E 3 E 2 E 2 20 FT WIND GUST.....10 5 5 MIX HGT (FT)........4300 300 300 300 300 300 TRANSPORT WIND......NE 9 NE 8 NE 8 E 12 SE 14 SE 14 .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT)...THEN BECOMING MOSTLY CLOUDY (80-90 PERCENT). PATCHY DRIZZLE LATE. MAX TEMPERATURE.....AROUND 62. MIN HUMIDITY........44 PERCENT. WIND (20 FT)........ SLOPE/VALLEY.......LIGHT WINDS...BECOMING SOUTHEAST 5 TO 14 MPH WITH GUSTS UP TO 25 MPH EARLY IN THE MORNING. MIXING HEIGHT.......300-2000 FT AGL...INCREASING TO 3500-3900 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....SOUTH 21 TO 28 MPH. TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).............23 29 48 72 91 96 WEATHER COV......... PATCHY WEATHER TYPE........NONE NONE NONE NONE NONE DRZL TSTM COV............ TEMP................40 44 50 56 61 62 RH..................85 79 61 49 44 48 20 FT WIND..........E 2 E 3 SE 6 SE 9 SE 9 SE 9 20 FT WIND GUST.....5 5 10 15 25 15 MIX HGT (FT)........300 2000 2000 3500 3900 3900 TRANSPORT WIND......SE 21 SE 23 SE 23 S 25 S 26 S 26 .THURSDAY NIGHT... SKY/WEATHER.........CLOUDY (90-100 PERCENT). PATCHY DRIZZLE. MIN TEMPERATURE.....AROUND 53. MAX HUMIDITY........96 PERCENT. WIND (20 FT)........ SLOPE/VALLEY.......SOUTHEAST WINDS 7 TO 12 MPH. MIXING HEIGHT.......1800-3500 FT AGL...DECREASING TO 300-1100 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....SOUTH 26 TO 35 MPH...INCREASING TO AROUND 37 MPH LATE. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).............95 90 92 94 100 100 WEATHER COV.........PATCHY PATCHY PATCHY PATCHY PATCHY PATCHY WEATHER TYPE........DRZL DRZL DRZL DRZL DRZL DRZL TSTM COV............ TEMP................61 59 57 56 54 54 RH..................53 62 72 80 90 90 20 FT WIND..........SE 7 SE 6 SE 6 SE 5 SE 5 SE 5 20 FT WIND GUST.....10 10 10 10 MIX HGT (FT)........3500 2400 2400 1800 1100 1100 TRANSPORT WIND......S 28 S 26 S 26 S 32 S 35 S 35 .FRIDAY... SKY/WEATHER.........CLOUDY (95-100 PERCENT). ISOLATED SHOWERS LATE. SCATTERED SHOWERS LATE. MAX TEMPERATURE.....AROUND 71. MIN HUMIDITY........57 PERCENT. WIND (20 FT)........ SLOPE/VALLEY.......SOUTH WINDS 7 TO 13 MPH. MIXING HEIGHT.......300-1700 FT AGL...INCREASING TO 3800-4700 FT AGL LATE IN THE MORNING. TRANSPORT WINDS.....SOUTH 37 TO 46 MPH...INCREASING TO AROUND 51 MPH LATE. TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).............100 100 100 100 100 100 WEATHER COV......... SCTTRD WEATHER TYPE........NONE NONE NONE NONE NONE RNSHWR TSTM COV............ TEMP................53 55 61 66 70 71 RH..................96 90 78 68 57 57 20 FT WIND..........SE 5 SE 5 S 6 S 7 S 7 S 8 20 FT WIND GUST..... 10 10 10 15 MIX HGT (FT)........300 1700 1700 3900 4700 4700 TRANSPORT WIND......S 37 S 37 S 37 S 44 S 46 S 46 $$ FORECASTER...P. NICOSIA REQUESTED BY...MATT BOSS TYPE OF REQUEST...PRESCRIBED .TAG 20130418.SNYDE.01/BGM