500  
FNUS71 KLWX 231249  
FWSLWX  
 
SPOT FORECAST FOR MILLS CREEK UNIT 1...USFS  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
849 AM EDT MON SEP 23 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON SEPTEMBER 23.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A COLD FRONT WILL APPROACH FROM THE WEST TODAY, PASSING ACROSS THE  
REGION THIS EVENING AND TONIGHT. HOT TEMPERATURES ARE EXPECTED AND  
A FEW SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE POSSIBLE  
WITH THIS FRONT. HIGH PRESSURE AND DRY CONDITIONS WILL THEN RETURN  
TUESDAY AND WEDNESDAY. ANOTHER COLD FRONT WILL CROSS THE AREA  
THURSDAY, BUT THE CHANCES FOR WIDESPREAD RAINFALL ARE VERY LOW.  
LVORI INDEX WILL BE BETWEEN 6 AND 7 MEANING THAT THE RISK OF  
LOW VISIBILITIES IS LOW.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). SLIGHT CHANCE OF  
SHOWERS LATE IN THE AFTERNOON.  
CWR.................10 PERCENT INCREASING TO 20 PERCENT LATE IN THE  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 86.  
MIN HUMIDITY........41 PERCENT.  
WIND (20 FT)........WEST WINDS 7 TO 8 MPH.  
MIXING HEIGHT.......6600 FT AGL.  
TRANSPORT WINDS.....WEST 17 TO 23 MPH.  
SMOKE DISPERSAL.....GOOD (48000 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (113100 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (EDT) 10 AM NOON 2 PM 4 PM  
SKY (%).........24 21 34 56  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
CWR.............0 0 10 10  
TEMP............76 81 84 86  
RH..............60 49 43 42  
20 FT WIND......W 7 W 8 W 7 W 8  
20 FT WIND GUST.12 13 11 13  
MIX HGT (FT)....3000 5700 6600 5500  
MIXNG WIND......W 18 W 23 W 17 W 18  
VRATE KT-FT/100048 113 99 89  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING  
PARTLY CLOUDY (30-40 PERCENT). SLIGHT CHANCE OF  
SHOWERS EARLY IN THE EVENING.  
CWR.................20 PERCENT DECREASING TO 10 PERCENT EARLY IN  
THE EVENING.  
MIN TEMPERATURE.....AROUND 59.  
MAX HUMIDITY........90 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 5 TO 7 MPH.  
MIXING HEIGHT.......0 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 6 TO 15 MPH.  
SMOKE DISPERSAL.....GOOD (38300 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (0 KNOT-FT) LATE IN THE  
NIGHT.  
 
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........63 55 51 44 34 27  
WEATHER COV.....S CHC  
WEATHER TYPE....RNSHWR NONE NONE NONE NONE NONE  
CWR.............20 10 10 10 0 0  
TEMP............81 73 69 66 65 62  
RH..............51 68 78 87 87 87  
20 FT WIND......W 7 W 6 W 6 W 6 NW 6 NW 6  
20 FT WIND GUST.11 10 10 10 8 7  
MIX HGT (FT)....2900 200 BLW100 200 200 200  
MIXNG WIND......W 15 W 7 W 7 W 8 W 7 NW 6  
VRATE KT-FT/100038 1 0 2 1 1  
   
TUESDAY
 
 
SKY/WEATHER.........SUNNY (5-15 PERCENT).  
CWR.................0 PERCENT.  
MAX TEMPERATURE.....AROUND 77.  
MIN HUMIDITY........37 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 5 TO 6 MPH.  
MIXING HEIGHT.......5600 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 5 TO 14 MPH.  
SMOKE DISPERSAL.....POOR (0 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (54900 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (EDT) 6 AM 9 AM NOON 3 PM  
SKY (%).........19 7 2 4  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
CWR.............0 0 0 0  
TEMP............59 65 73 76  
RH..............90 70 49 39  
20 FT WIND......NW 5G7 NW 6G10 NW 6G10 NW 6G10  
MIX HGT (FT)....BLW100 1000 4000 5500  
MIXNG WIND......NW 6 NW 8 NW 14 NW 12  
VRATE KT-FT/10000 7 48 55  
 

 
FORECASTER...ROSA  
REQUESTED BY...LARRY SHAW  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1915039.11/LWX  
.DELDT 09/23/19  
.FORMATTERVERSION 1.0.26  
 
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