626  
FNUS71 KAKQ 211747  
FWSAKQ  
 
SPOT FORECAST FOR MDBWR MARSHLANDS...USFWS  
NATIONAL WEATHER SERVICE WAKEFIELD VA  
1247 PM EST WED FEB 21 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 EST ON FEBRUARY 21.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
HIGH PRESSURE BECOMES ANCHORED OFF THE SOUTHEAST COAST THROUGH  
TONIGHT. A BACKDOOR COLD FRONT DROPS SOUTH ACROSS THE AREA  
THURSDAY, THEN LIFTS BACK NORTH ACROSS THE REGION THROUGH THE  
FRIDAY AFTERNOON AND EVENING.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT).  
MAX TEMPERATURE.....AROUND 72.  
MIN HUMIDITY........67 PERCENT.  
WIND (20 FT)........SOUTH WINDS 10 TO 15 MPH.  
CHANCE OF PCPN......10 PERCENT.  
MIXING HEIGHT.......1200-1800 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.  
 
TIME (EST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).............63 59 55 52 49 46 42 37  
WEATHER COV.........  
WEATHER TYPE........  
TSTM COV............  
TEMP................65 68 69 69 71 70 70 68  
RH..................84 80 72 69 68 70 71 76  
20 FT WIND DIR......SW SW SW SW SW S S S  
20 FT WIND SPD......7 8 8 8 7 7 6 6  
20 FT WIND GUST.....20 20 20 20 20 20 15 15  
MIX HGT (KFT).......0.5 0.6 0.7 1.7 1.8 1.8 1.8 1.3  
TRANSP WIND DIR.....SW SW SW SW SW SW SW SW  
TRANSP WIND SPD.....17 18 16 16 15 15 14 13  
ADI.................15 11 16 27 27 27 26 22  
CHC OF PCPN (%).....10 10 10 10 10 10 10 10  
VRATE KT-FT/1000....8 10 10 25 23 23 22 14  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT), THEN BECOMING  
MOSTLY CLOUDY (65-75 PERCENT). A SLIGHT CHANCE  
OF SHOWERS LATE IN THE EVENING. A CHANCE OF  
SHOWERS AFTER MIDNIGHT.  
MIN TEMPERATURE.....AROUND 51.  
MAX HUMIDITY........96 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 5 TO 8 MPH IN THE EVENING,  
BECOMING LIGHT, THEN BECOMING NORTH AROUND 5  
MPH LATE.  
CHANCE OF PCPN......40 PERCENT.  
 
TIME (EST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).............33 28 34 40 46 51 55 60 69 78 87 90  
WEATHER COV......... SCH SCH CHC CHC CHC CHC CHC  
WEATHER TYPE........ RW RW RW RW RW RW RW  
TSTM COV............  
TEMP................65 63 63 63 62 61 60 58 57 55 55 54  
RH..................81 84 84 84 87 87 87 93 93 96 93 90  
20 FT WIND DIR......S S S SW SW SW SW W W NW N N  
20 FT WIND SPD......6 6 5 5 5 5 4 3 3 4 4 4  
20 FT WIND GUST.....15 15 15 15 10 10 10 5 5 10 10 10  
LVORI...............4 4 5 5 6 6 6 6 6 8 7 6  
CHC OF PCPN (%).....10 10 10 10 10 20 20 40 40 40 40 40  
   
THURSDAY
 
 
SKY/WEATHER.........CLOUDY (90-100 PERCENT). A CHANCE OF SHOWERS  
EARLY IN THE MORNING, THEN A CHANCE OF RAIN IN  
THE MORNING. A CHANCE OF SHOWERS IN THE  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 53.  
MIN HUMIDITY........80 PERCENT.  
WIND (20 FT)........LIGHT WINDS, BECOMING NORTHEAST 5 TO 8 MPH  
EARLY IN THE MORNING.  
CHANCE OF PCPN......50 PERCENT.  
MIXING HEIGHT.......300-1200 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 8 TO 15 MPH.  
 
TIME (EST) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).............92 94 92 97 98 94  
WEATHER COV.........CHANCE CHANCE CHANCE CHANCE CHANCE CHANCE  
WEATHER TYPE........RNSHWR RAIN RAIN RAIN RNSHWR RNSHWR  
TSTM COV............  
TEMP................53 52 52 51 50 48  
RH..................89 86 83 83 80 86  
20 FT WIND..........N 5 NE 5 E 6 E 5 E 5 NE 5  
20 FT WIND GUST.....10 15 15 10 10 10  
MIX HGT (FT)........300 500 700 800 900 1200  
TRANSPORT WIND......N 8 NE 14 E 15 E 15 E 12 NE 8  
ADI.................9 15 17 16 14 12  
CHC OF PCPN (%).....40 50 50 50 50 50  
VRATE KT-FT/1000....2 6 9 10 9 9  
 

 
FORECASTER...RUSNAK  
REQUESTED BY...JOHN ASHCRAFT  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1800862.6/AKQ  
.EMAIL JOHN_ASHCRAFT@FWS.GOV  
 
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