183
FNUS71 KLWX 022158
FWSLWX
SPOT FORECAST FOR TROUT POND DAY USE...USFS
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
558 PM EDT THU APR 2 2026
FORECAST IS BASED ON IGNITION TIME OF 1800 EDT ON APRIL 02.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
A BOUNDARY SEPARATING MUCH COOLER MARINE AIR FROM WARM AND HUMID
AIR WILL REMAIN STALLED OUT NEAR THE POTOMAC HIGHLANDS INTO THE
CENTRAL SHENANDOAH VALLEY THROUGH TONIGHT. THE BOUNDARY WILL
RETURN NORTH AS A WARM FRONT FRIDAY AND IT WILL TURN OUT
NOTICEABLY WARMER FOR MOST AREAS FRIDAY AFTERNOON.
WARM AND HUMID CONDITIONS WILL CONTINUE THROUGH SATURDAY BEFORE A
STRONG COLD FRONT PASSES THROUGH THE AREA SUNDAY. THIS BOUNDARY
WILL BRING WIDESPREAD SHOWERS WITH ITS PASSAGE. AN UPPER-LEVEL
TROUGH WILL BUILD OVERHEAD BEHIND THE BOUNDARY FOR EARLY NEXT WEEK
AND IT WILL TURN OUT MUCH COOLER.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT). CHANCE OF RAIN SHOWERS
EARLY IN THE EVENING.
CWR.................60 PERCENT EARLY DECREASING TO 10 PERCENT.
CHANCE OF THUNDER...23 PERCENT.
TEMPERATURE.........65 AT IGNITION...MIN 56.
RH..................73 PERCENT AT IGNITION...MAX 90 PERCENT.
WIND (20 FT)........WINDS SOUTHEAST AT 9 MPH AT
IGNITION...OTHERWISE SOUTH WINDS 7 TO 9 MPH.
GUSTS UP TO 20 MPH EARLY IN THE EVENING THEN 21
MPH EARLY IN THE MORNING. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE
EVENING.
MIXING HEIGHT.......1100 FT AGL AT IGNITION...OTHERWISE 200 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 15 MPH.
SMOKE DISPERSAL.....FAIR /14700 KNOT-FT/ AT IGNITION. MIN...POOR
/2100 KNOT-FT/.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........59 52 51 46 46 61 58 51 56 57 53 62
WEATHER COV.....LKY LKY CHC SCH
WEATHER TYPE....RW RW RW RW
TSTM COV........SCH SCH
CWR.............60 60 30 20 10 0 0 0 0 0 0 0
CHC OF THDR (%).20 20 0 10 0 0 0 0 0 0 0 0
TEMP............65 64 63 61 59 58 57 56 56 56 56 56
RH..............73 75 72 75 80 80 80 86 83 83 83 83
20 FT WIND DIR..SE SE SE SE SE SE S S S S S S
20 FT WIND SPD..9 8 8 8 7 7 7 7 7 7 8 9
20 FT WIND GUST.20 20 20 18 18 17 17 16 16 17 18 21
MIX HGT (KFT)...1.1 0.4 0.2 0.3 0.2 0.3 0.3 0.4 0.3 0.3 0.3 0.2
TRANSP WIND DIR.SE SE SE SE SE SE S S S S S S
TRANSP WIND SPD.15 12 12 12 12 10 10 9 10 10 12 13
VRATE KT-FT/1K..15 4 2 3 2 3 3 3 2 2 3 2
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS LATE IN THE AFTERNOON.
CWR.................10 PERCENT INCREASING TO 20 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF THUNDER...13 PERCENT.
TEMPERATURE.........MAX 78.
RH..................MIN 45 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 9 TO 12 MPH WITH GUSTS TO
AROUND 26 MPH.
MIXING HEIGHT.......5300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 13 TO 20 MPH SHIFTING TO THE WEST 14
TO 17 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (2600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (84700 KNOT-FT) IN THE
AFTERNOON.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........62 45 20 26 37 58
WEATHER COV..... S CHC
WEATHER TYPE....NONE NONE NONE NONE NONE RNSHWR
TSTM COV........
CWR.............0 0 0 0 10 20
CHC OF THDR (%).0 0 0 0 10 10
TEMP............56 56 66 73 76 78
RH..............86 86 63 49 46 43
20 FT WIND......S 10 S 12 S 12 SW 10 SW 10 SW 9
20 FT WIND GUST.23 26 26 24 22 21
MIX HGT (FT)....200 400 1300 3900 5300 4600
TRANSPORT WIND..S 13 SW 14 SW 17 W 20 W 18 W 17
VRATE KT-FT/1K..3 4 19 66 85 70
VENTRATE CAT....POOR POOR POOR GOOD GOOD GOOD
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT). SLIGHT CHANCE OF
SHOWERS EARLY IN THE EVENING, THEN CHANCE OF
SHOWERS EARLY IN THE EVENING.
CWR.................20 PERCENT DECREASING TO 10 PERCENT.
CHANCE OF THUNDER...13 PERCENT.
TEMPERATURE.........MIN 62.
RH..................MAX 78 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 8 MPH.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 9 TO 14 MPH.
SMOKE DISPERSAL.....FAIR (27600 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (900 KNOT-FT) LATE IN THE
NIGHT.
TIME (EDT) 6 PM 9 PM MIDNGT 3 AM
SKY (%).........62 58 55 39
WEATHER COV.....S CHC
WEATHER TYPE....RNSHWR NONE NONE NONE
TSTM COV........
CWR.............20 10 10 10
CHC OF THDR (%).10 10 10 0
TEMP............75 68 65 63
RH..............46 63 68 72
20 FT WIND......SW 8G17 S 6G16 SW 7G16 SW 7G16
MIX HGT (FT)....2300 100 100 100
TRANSPORT WIND..SW 14 SW 13 SW 13 W 10
VRATE KT-FT/1K..28 1 1 1
VENTRATE CAT....POOR POOR POOR POOR
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT). SLIGHT CHANCE OF
SHOWERS EARLY IN THE MORNING. CHANCE OF SHOWERS
LATE IN THE AFTERNOON.
CWR.................10 PERCENT INCREASING TO 50 PERCENT.
CHANCE OF THUNDER...11 PERCENT.
TEMPERATURE.........MAX 79.
RH..................MIN 45 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 7 TO 9 MPH WITH GUSTS TO AROUND
20 MPH SHIFTING TO THE SOUTH 10 TO 13 MPH WITH
GUSTS TO AROUND 25 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......6400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 15 MPH SHIFTING TO THE SOUTH 17
TO 21 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (90300 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (101600
KNOT-FT) LATE IN THE AFTERNOON.
TIME (EDT) 6 AM 10 AM 2 PM
SKY (%).........32 43 63
WEATHER COV..... S CHC CHANCE
WEATHER TYPE....NONE RNSHWR RNSHWR
TSTM COV........
CWR.............10 20 50
CHC OF THDR (%).0 0 10
TEMP............62 70 77
RH..............75 63 48
20 FT WIND......SW 7G15 SW 8G17 S 10G21
MIX HGT (FT)....BLW100 1900 6000
TRANSPORT WIND..W 9 SW 8 S 17
VRATE KT-FT/1K..0 14 90
VENTRATE CAT....POOR POOR GOOD
FORECASTER...ROSA
REQUESTED BY...COLLETT
TYPE OF REQUEST...PRESCRIBED
.TAG 2608890.0/LWX
.DELDT 04/02/26
.FORMATTERVERSION 2.0.0
.EMAIL AARON.P.STROBEL@USDA.GOV,JAY.COLLETT@USDA.GOV
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