909  
FNUS71 KLWX 191433  
FWSLWX  
 
SPOT FORECAST FOR SLATE LICK RX...U.S. FOREST SERVICE  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
933 AM EST WED FEB 19 2020  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 EST ON FEBRUARY 19.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A COLD FRONT HAS PUSHED EAST OF THE AREA. SKIES ARE CLEARING OUT  
RAPIDLY BEHIND THE FRONT WITH MOSTLY SUNNY SKIES BY AFTERNOON.  
 
A STRONG AREA OF HIGH PRESSURE WILL BEGIN BUILDING OVER THE  
REGION TONIGHT INTO THURSDAY MORNING, BRINGING DRY AND CHILLIER  
CONDITIONS. HOWEVER, LOW PRESSURE WILL TRACK ACROSS THE SOUTHERN  
UNITED STATES THURSDAY AND OFF THE CAROLINA COAST THURSDAY NIGHT.  
THE NORTHERN EDGE OF ITS PRECIPITATION SHIELD MAY REACH CENTRAL  
VIRGINIA AND SOUTHERN MARYLAND.  
 
HIGH PRESSURE WILL RETURN FRIDAY INTO THE WEEKEND. TEMPERATURES  
WILL MODERATE THIS WEEKEND AS THIS HIGH MOVES OFFSHORE.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT).  
CWR.................0 PERCENT.  
MAX TEMPERATURE.....AROUND 49.  
MIN HUMIDITY........29 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 6 TO 8 MPH.  
MIXING HEIGHT.......4700 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 14 TO 22 MPH.  
SMOKE DISPERSAL.....FAIR (25800 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (79700 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (EST) 10 AM NOON 2 PM 4 PM  
SKY (%).........65 39 64 51  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
CWR.............0 0 0 0  
TEMP............43 47 49 47  
RH..............41 32 29 30  
20 FT WIND......N 6 NW 8 NW 8 NW 6  
20 FT WIND GUST.12 14 14 12  
MIX HGT (FT)....1600 2900 4300 4600  
MIXNG WIND......NW 18 NW 21 NW 21 NW 17  
VRATE KT-FT/100026 53 77 68  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (65-75 PERCENT).  
CWR.................0 PERCENT.  
MIN TEMPERATURE.....AROUND 30.  
MAX HUMIDITY........66 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS AROUND 5 MPH EARLY IN THE  
EVENING BECOMING LIGHT.  
MIXING HEIGHT.......200 FT AGL.  
TRANSPORT WINDS.....NORTH 2 TO 10 MPH.  
SMOKE DISPERSAL.....FAIR (16300 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (500 KNOT-FT) LATE IN THE  
NIGHT.  
 
TIME (EST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........21 17 22 19 38 77  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
CWR.............0 0 0 0 0 0  
TEMP............42 38 35 33 31 32  
RH..............37 44 52 56 61 61  
20 FT WIND......NW 5 NW 4 NW 3 N 2 NE 2 E 2  
20 FT WIND GUST.8 6 5  
MIX HGT (FT)....1800 300 600 400 300 300  
MIXNG WIND......NW 10 NW 8 NW 8 NW 5 N 2 N 2  
VRATE KT-FT/100016 2 4 2 1 1  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT).  
CWR.................10 PERCENT.  
MAX TEMPERATURE.....AROUND 40.  
MIN HUMIDITY........41 PERCENT.  
WIND (20 FT)........LIGHT WINDS.  
MIXING HEIGHT.......3500 FT AGL.  
TRANSPORT WINDS.....NORTH 1 TO 3 MPH SHIFTING TO THE WEST AROUND 2  
MPH EARLY IN THE AFTERNOON, THEN SHIFTING TO  
THE NORTHEAST 2 TO 3 MPH LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (700 KNOT-FT).  
 
TIME (EST) 6 AM 9 AM NOON 3 PM  
SKY (%).........85 88 88 85  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
CWR.............0 0 10 10  
TEMP............31 34 37 39  
RH..............66 58 52 48  
20 FT WIND......NE 1G2 NE 2 N 2G4 N 3G4  
MIX HGT (FT)....200 1300 3100 2900  
MIXNG WIND......NE 3 N 2 W 2 N 2  
VRATE KT-FT/10001 3 6 6  
 

 
FORECASTER...MARTIN  
REQUESTED BY...BRENT FOLTZ  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2002497.0/LWX  
.DELDT 02/19/20  
.FORMATTERVERSION 1.0.26  
 
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