237  
FNUS71 KLWX 280626  
FWSLWX  
 
SPOT FORECAST FOR GERTIES FIRE...U.S. FOREST SERVICE  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EST SUN NOV 28 2021  
 
FORECAST IS BASED ON FORECAST START TIME OF 0800 EST ON NOVEMBER 28.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
AN UPPER-LEVEL DISTURBANCE IS PASSING THROUGH THE REGION  
TONIGHT, ALTHOUGH NO PRECIPITATION IS EXPECTED. WINDS WILL REMAIN  
LIGHT AND VARIABLE.  
 
SUNDAY WILL BE MILDER WITH WINDS SHIFTING FROM SOUTHWEST TO WEST  
IN THE MORNING. A COLD FRONT WILL PASS THROUGH DURING THE EARLY  
EVENING, NO PRECIPITATION IS EXPECTED, BUT THERE WILL BE A SUBTLE  
WIND SHIFT TO THE NORTHWEST, AND PERHAPS AN INCREASE IN GUSTINESS.  
BLUSTERY AND CHILLY CONDITIONS ARE EXPECTED MONDAY.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).  
CWR.................0 PERCENT.  
MAX TEMPERATURE.....AROUND 53.  
MIN HUMIDITY........44 PERCENT.  
WIND (20 FT)........WEST WINDS 6 TO 10 MPH. GUSTS UP TO 20 MPH.  
MIXING HEIGHT.......2500 FT AGL.  
TRANSPORT WINDS.....WEST 12 TO 21 MPH.  
SMOKE DISPERSAL.....POOR (5500 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (37700 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (EST) 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........15 22 44 56 58  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE  
CWR.............0 0 0 0 0  
TEMP............40 46 50 52 50  
RH..............55 51 48 44 46  
20 FT WIND......W 6 W 8 W 8 W 8 W 7  
20 FT WIND GUST.16 18 17 14 14  
MIX HGT (FT)....500 1700 2400 2500 1800  
MIXNG WIND......W 12 W 21 W 17 W 17 W 20  
VRATE KT-FT/10006 30 38 37 30  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).  
CWR.................0 PERCENT.  
MIN TEMPERATURE.....AROUND 28.  
MAX HUMIDITY........63 PERCENT.  
WIND (20 FT)........WEST WINDS 6 TO 10 MPH, BECOMING NORTHWEST  
DURING THE EVENING.  
MIXING HEIGHT.......0 FT AGL.  
TRANSPORT WINDS.....WEST 8 TO 17 MPH SHIFTING TO THE NORTHWEST 14  
TO 23 MPH OVERNIGHT, THEN DECREASING TO 8 TO 9  
MPH AFTER 3 AM.  
SMOKE DISPERSAL.....EXCELLENT (62100 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (0 KNOT-FT) LATE IN THE  
NIGHT.  
 
TIME (EST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........35 31 48 40 27 10  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
CWR.............0 0 0 0 0 0  
TEMP............44 40 38 34 32 30  
RH..............53 59 57 61 61 60  
20 FT WIND......W 6 W 6 W 7 NW 6 NW 6 W 6  
20 FT WIND GUST.13 12 13 11 12 12  
MIX HGT (FT)....600 BLW100 200 2500 2400 100  
MIXNG WIND......W 12 W 8 NW 13 NW 21 NW 20 NW 9  
VRATE KT-FT/10006 0 2 45 41 1  
   
MONDAY
 
 
SKY/WEATHER.........SUNNY (15-25 PERCENT).  
CWR.................0 PERCENT.  
MAX TEMPERATURE.....AROUND 42.  
MIN HUMIDITY........37 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 6 TO 12 MPH WITH GUSTS TO AROUND  
22 MPH.  
MIXING HEIGHT.......3900 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 8 TO 14 MPH INCREASING TO 13 TO 22  
MPH IN THE LATE MORNING AND EARLY AFTERNOON,  
THEN SHIFTING TO THE WEST 9 TO 12 MPH LATE IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (0 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (58100 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (EST) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........7 7 10 11 15 24  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
CWR.............0 0 0 0 0 0  
TEMP............29 30 35 40 41 40  
RH..............63 60 52 42 39 39  
20 FT WIND......W 7 W 9 NW 12 NW 12 NW 10 NW 6  
20 FT WIND GUST.11 13 20 22 16 13  
MIX HGT (FT)....BLW100 800 2700 3700 3900 3200  
MIXNG WIND......NW 8 NW 14 NW 22 NW 17 NW 13 W 12  
VRATE KT-FT/10000 10 51 54 43 32  
 

 
FORECASTER...SNYDER  
REQUESTED BY...BRENT FOLTZ  
TYPE OF REQUEST...WILDFIRE  
.TAG 2121543.0/LWX  
.DELDT 11/28/21  
.FORMATTERVERSION 1.0.26  
 
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