844  
FNUS71 KAKQ 250955  
FWSAKQ  
 
SPOT FORECAST FOR NASSAWANGO-U39...THE NATURE CONSERVANCY  
NATIONAL WEATHER SERVICE WAKEFIELD VA  
555 AM EDT THU APR 25 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON APRIL 25.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE AT 757-899-5734.  
   
DISCUSSION
 
 
HIGH PRESSURE BUILDS NORTH OF THE AREA TODAY, SLIDING OFFSHORE  
LATER THIS WEEK. SOME PASSING SCATTERED SHOWERS THIS MORNING, WITH  
PARTIAL CLEARING THIS AFTERNOON. WINDS REMAIN NORTHEAST 10 TO 12 MPH  
TODAY WITH AFTERNOON MINUMUM RELATIVE HUMIDITY VALUES REMAINING  
RELATIVELY HIGH (~60%) WITH PERSISTENT ONSHORE FLOW.  
   
TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). SCATTERED RAIN  
SHOWERS IN THE MORNING.  
CHANCE OF PCPN......30 PERCENT.  
MAX TEMPERATURE.....AROUND 54.  
MIN HUMIDITY........59 PERCENT.  
WIND (20 FT)........NORTHEAST WINDS 9 TO 12 MPH.  
MIXING HEIGHT.......2800 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 18 TO 24 MPH.  
SMOKE DISPERSAL.....FAIR (16200 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (50400 KNOT-FT) IN THE  
AFTERNOON.  
LVORI...............3.  
ADI.................13 EARLY IN THE MORNING INCREASING TO 64 IN THE  
AFTERNOON.  
HAINES INDEX........2 TO 3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........47 48 50 52 51 48 49 47 46  
WEATHER COV.....SCT SCT  
WEATHER TYPE....RW RW  
TSTM COV........  
CHC OF PCPN (%).30 30 10 10 10 0 0 0 0  
TEMP............50 51 53 53 53 53 53 52 52  
RH..............71 66 59 59 59 59 59 59 59  
20 FT WIND DIR..NE NE NE NE NE NE NE NE NE  
20 FT WIND SPD..11 11 12 12 11 11 10 10 10  
20 FT WIND GUST.19 19 20 20 19 19 16 16 16  
MIX HGT (KFT)...2.2 2.3 2.4 2.5 2.7 2.8 2.7 2.6 2.5  
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE  
TRANSP WIND SPD.24 23 22 22 21 21 20 20 18  
LVORI...........3 1 1 1 1 1 1 1 1  
ADI.............64 63 61 48 47 64 59 57 53  
HAINES INDEX....2 2 2 2 2 2 2 2 2  
VRATE KT-FT/1K..46 46 46 48 48 50 46 44 40  
VENTRATE CAT....FR FR FR FR FR FR FR FR PR  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
MIN TEMPERATURE.....AROUND 36.  
MAX HUMIDITY........92 PERCENT.  
WIND (20 FT)........EAST WINDS 5 TO 9 MPH IN THE EVENING BECOMING  
LIGHT.  
MIXING HEIGHT.......500 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 9 TO 17 MPH.  
SMOKE DISPERSAL.....GOOD (31400 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (3900 KNOT-FT) LATE IN THE  
NIGHT.  
LVORI...............3.  
ADI.................46 EARLY IN THE EVENING DECREASING TO 4 LATE IN  
THE NIGHT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........44 41 38 31 27 24 27 34 38 38 38 38  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............50 49 47 48 46 45 44 43 43 42 42 41  
RH..............63 68 71 68 76 79 82 86 86 86 86 89  
20 FT WIND DIR..E E E E E E NE NE NE NE NE NE  
20 FT WIND SPD..9 7 6 6 5 4 4 3 3 3 3 3  
20 FT WIND GUST.14 12 11 9 8 7 7 6 5 5 6 6  
MIX HGT (KFT)...2.1 1.7 1.3 1.2 0.9 0.7 0.6 0.5 0.5 0.5 0.5 0.5  
TRANSP WIND DIR.NE E E E NE NE NE NE NE NE NE NE  
TRANSP WIND SPD.17 16 15 14 12 10 9 9 9 9 10 12  
LVORI...........1 3 3 3 4 4 4 5 5 5 5 5  
ADI.............46 18 7 6 5 5 4 4 4 4 5 5  
HAINES INDEX....2 2 2 2 2 2 2 2 2 2 2 2  
VRATE KT-FT/1K..31 24 17 14 9 6 5 4 4 4 4 5  
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....AROUND 59.  
MIN HUMIDITY........37 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING EAST 5 TO 10 MPH EARLY IN  
THE MORNING.  
MIXING HEIGHT.......3900 FT AGL.  
TRANSPORT WINDS.....EAST 13 TO 15 MPH.  
SMOKE DISPERSAL.....POOR (7800 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (42600 KNOT-FT) IN THE  
AFTERNOON.  
LVORI...............4.  
ADI.................6 EARLY IN THE MORNING INCREASING TO 60 IN THE  
AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........31 17 10 6 2 2  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CHC OF PCPN (%).0 0 0 0 0 0  
TEMP............40 40 47 53 56 59  
RH..............92 92 63 46 42 37  
20 FT WIND......NE 4 NE 5 E 7 E 9 E 10 E 9  
20 FT WIND GUST.7 9 13 15 16 14  
MIX HGT (FT)....700 1400 2600 3400 3900 3400  
TRANSPORT WIND..NE 13 E 15 E 15 E 14 E 13 E 13  
LVORI...........6 4 1 1 1 1  
ADI.............6 28 51 60 46 51  
HAINES INDEX....2 2 2 2 2 2  
VRATE KT-FT/1K..8 19 35 42 43 36  
VENTRATE CAT....POOR POOR POOR FAIR FAIR POOR  
 

 
FORECASTER...MONTEFUSCO  
REQUESTED BY...GABRIEL CAHALAN  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2412394.0/AKQ  
.DELDT 04/25/24  
.FORMATTERVERSION 2.0.0  
.EMAIL GCAHALAN@TNC.ORG  
 
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