FNUS73 KJKL 021123 FWSJKL SPOT FORECAST FOR TIPRELL A B...NPS NATIONAL WEATHER SERVICE JACKSON KY 723 AM EDT TUE APR 2 2013 FORECAST IS BASED ON IGNITION TIME OF 1125 EDT ON APRIL 02. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A RIDGE OF SURFACE HIGH PRESSURE WILL CONTINUE TO BUILD INTO EASTERN KY FROM THE NORTHWEST TODAY...AND THEN PASS BY TO OUR NORTH ON WEDNESDAY. WITH THE PROXIMITY OF THE HIGH...WINDS WILL GENERALLY BE HELD TO 10 MPH OR LESS THROUGH WEDNESDAY. WINDS WILL GENERALLY BE STRONGEST TODAY AND A BIT LIGHTER ON WEDNESDAY. ACCORDINGLY...THE VENT RATE WILL ALSO BE HIGHER TODAY COMPARED TO WEDNESDAY. VENT RATE PROJECTIONS ARE LISTED IN THE TABLE BELOW. A SEASONABLY COOL AND DRY AIRMASS COUPLED WITH STRONG HEATING FROM THE EARLY APRIL SUNSHINE WILL LEAD TO RATHER LOW RELATIVE HUMIDITY EACH AFTERNOON THROUGH WEDNESDAY...WITH WEDNESDAY EXPECTED TO BE THE DRIER OF THE TWO DAYS. A LOW PRESSURE SYSTEM WILL APPROACH THE AREA WEDNESDAY NIGHT AND THURSDAY...EVENTUALLY BRINGING A LIKELIHOOD OF RAIN BY LATE ON THURSDAY AFTERNOON. .TODAY... SKY/WEATHER.........SUNNY. TEMPERATURE.........AROUND 40 AT IGNITION...MAX AROUND 53. HUMIDITY............38 PERCENT AT IGNITION...MIN 22-26 PERCENT. WIND (20 FT)........NORTHWEST AROUND 4 MPH AT IGNITION...BECOMING NORTHWEST 6 TO 9 MPH AROUND 1300. SURROUNDING RIDGE...NORTHWEST AROUND 5 MPH AT IGNITION...BECOMING NORTHWEST AROUND 11 MPH AROUND 1300. RIDGETOP WIND.......NORTHWEST AROUND 5 MPH AT IGNITION...BECOMING NORTHWEST AROUND 11 MPH AROUND 1300. POP.................0 PERCENT. LAL.................1. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH AT IGNITION...MAX 3. MIXING HEIGHT.......AROUND 3900 FT AGL AT IGNITION...INCREASING TO 4100-5400 FT AGL AROUND 1300. TRANSPORT WINDS.....NORTHWEST AROUND 8 MPH AT IGNITION...BECOMING NORTHWEST 9 TO 14 MPH AROUND 1300. DISPERSION INDEX....65. TIME (EDT) 11 AM 1 PM 3 PM 5 PM 7 PM SKY (%)............10 13 16 27 32 WEATHER COV........ WEATHER TYPE.......NONE NONE NONE NONE NONE TEMP...............38 45 50 52 51 RH.................40 33 25 22 23 20 FT WIND.........NW 3 NW 6 NW 8 W 8 NW 7 20 FT WIND GUST....5 10 15 15 10 RIDGETOP WIND......NW 5 NW 10 NW 12 W 12 NW 10 MIX HGT (FT).......3900 4800 5400 5600 4300 TRANSPORT WIND.....NW 8 NW 10 W 13 W 14 NW 14 VENT RATE (KT-FT)..27326 43191 56961 65080 52347 HAINES INDEX.......3 3 3 3 3 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR. TEMPERATURE.........AROUND 28. HUMIDITY............MAX 63 PERCENT. WIND (20 FT)........NORTHWEST WINDS 5 TO 6 MPH EARLY BECOMING LIGHT. SURROUNDING RIDGE...NORTHWEST 5 TO 10 MPH. RIDGETOP WIND.......NORTHWEST 5 TO 10 MPH. POP.................0 PERCENT. LAL.................1. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. TIME (EDT) 8 PM 10 PM MIDNGT 2 AM 4 AM 6 AM SKY (%).........34 30 25 21 16 9 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............48 38 35 33 31 29 RH..............26 37 46 52 55 61 20 FT WIND......NW 6 NW 3 N 3 N 2 N 2 NW 2 20 FT WIND GUST.10 5 5 5 5 5 RIDGETOP WIND...NW 10 NW 5 N 5 N 5 N 5 NW 5 MIX HGT (FT)....3600 1500 1600 1100 600 500 TRANSPORT WIND..NW 15 NW 15 N 15 N 14 NE 14 NE 13 HAINES INDEX....3 3 3 3 3 3 .WEDNESDAY... SKY/WEATHER.........SUNNY. TEMPERATURE.........MAX AROUND 58. HUMIDITY............MIN 18-22 PERCENT. WIND (20 FT)........NORTHWEST 2 TO 5 MPH...BECOMING NORTHEAST AROUND 6 MPH AROUND 1200. SURROUNDING RIDGE...NORTHEAST 5 TO 10 MPH. RIDGETOP WIND.......NORTHEAST 5 TO 10 MPH. POP.................0 PERCENT. LAL.................1. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......600-1400 FT AGL EARLY...INCREASING TO 3100-4300 FT AGL AROUND 1100. TRANSPORT WINDS.....NORTH NORTHEAST 7 TO 10 MPH. DISPERSION INDEX....31. TIME (EDT) 8 AM 10 AM NOON 2 PM 4 PM 6 PM SKY (%)............5 6 7 8 11 14 WEATHER COV........ WEATHER TYPE.......NONE NONE NONE NONE NONE NONE TEMP...............27 33 42 48 52 53 RH.................65 51 36 25 21 22 20 FT WIND.........NW 2 N 3 N 5 N 6 N 6 N 5 20 FT WIND GUST....5 5 10 10 10 10 RIDGETOP WIND......NW 5 N 5 N 5 N 10 N 10 N 5 MIX HGT (FT).......600 3100 4000 4300 4000 3800 TRANSPORT WIND.....NE 10 N 9 N 8 N 8 N 8 NE 9 VENT RATE (KT-FT)..5217 2460 27930 30000 28000 29740 HAINES INDEX.......3 3 3 3 3 3 $$ FORECASTER...PELTON REQUESTED BY...BURN BOSS SASHA ERNST TYPE OF REQUEST...PRESCRIBED .TAG 20130402.TIPRE.01/JKL