651
FNUS71 KLWX 201000
FWSLWX
SPOT FORECAST FOR NORTH RIVER BLACK LINING...USFS
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
600 AM EDT FRI MAR 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 EDT ON MARCH 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
MILDER TODAY WITH A CLIPPER SYSTEM BRINGING SOME RAIN SHOWERS TO THE
AREA LATE IN THE DAY. SOUTHWESTERLY WINDS INCREASE TODAY WITH
MOUNTAIN TOP GUSTS AROUND 25 TO 35 MPH. RAINFALL AMOUNTS HAVE
TRENDED SLIGHTLY UPWARD, WITH 0.1-0.25" EXPECTED (LOCALLY HIGHER
IN ANY THUNDERSTORMS).
CONTINUED ABOVE AVERAGE TEMPERATURES THIS WEEKEND WITH ANOTHER
CHANCE FOR RAIN LATE IN THE WEEKEND WITH A COLD FRONTAL PASSAGE.
COOLER WEATHER RETURNS BY EARLY NEXT WEEK AS CANADIAN HIGH PRESSURE
APPROACHES FROM THE WEST.
TODAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS LATE IN THE AFTERNOON. CHANCE OF
RAIN SHOWERS LATE IN THE AFTERNOON.
CWR.................10 PERCENT INCREASING TO 30 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
MAX TEMPERATURE.....AROUND 61.
MIN HUMIDITY........51 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 8 TO 16 MPH. GUSTS UP TO 35
MPH.
MIXING HEIGHT.......4600 FT AGL.
TRANSPORT WINDS.....WEST 13 TO 21 MPH INCREASING TO SOUTHWEST 24 TO
32 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (1600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (86000 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (104900
KNOT-FT) LATE IN THE AFTERNOON.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........40 35 48 72 90 89
WEATHER COV..... S CHC
WEATHER TYPE....NONE NONE NONE NONE NONE RNSHWR
TSTM COV........
CWR.............0 0 0 0 0 20
CHC OF THDR (%).0 0 0 0 0 0
TEMP............36 38 48 57 60 60
RH..............82 79 63 51 47 51
20 FT WIND......W 7 SW 8 SW 10 SW 14 SW 14 SW 14
20 FT WIND GUST.16 18 23 28 30 31
MIX HGT (FT)....200 200 900 2900 4300 4600
TRANSPORT WIND..W 13 W 14 W 18 W 24 SW 29 SW 32
VRATE KT-FT/1K..2 2 15 60 107 129
VENTRATE CAT....POOR POOR POOR GOOD VYGD VYGD
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF RAIN
SHOWERS EARLY IN THE EVENING, THEN SLIGHT
CHANCE OF RAIN SHOWERS EARLY IN THE EVENING.
CHANCE OF RAIN SHOWERS IN THE LATE EVENING AND
OVERNIGHT.
CWR.................40 PERCENT DECREASING TO 30 PERCENT EARLY IN
THE EVENING, THEN DECREASING TO 20 PERCENT
EARLY IN THE EVENING INCREASING TO 30 PERCENT
LATE IN THE EVENING INCREASING TO 40 PERCENT
DECREASING TO 30 PERCENT OVERNIGHT DECREASING
TO 10 PERCENT.
CHANCE OF THUNDER...13 PERCENT.
MIN TEMPERATURE.....AROUND 45.
MAX HUMIDITY........100 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 14 MPH WITH GUSTS TO AROUND 30
MPH SHIFTING TO THE NORTHWEST 8 TO 9 MPH WITH
GUSTS TO AROUND 22 MPH OVERNIGHT.
MIXING HEIGHT.......300 FT AGL.
TRANSPORT WINDS.....WEST 17 TO 22 MPH SHIFTING TO THE NORTHWEST 15
TO 16 MPH AFTER 3 AM.
SMOKE DISPERSAL.....GOOD (52700 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (3900 KNOT-FT) LATE IN THE
NIGHT.
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........93 58 65 68 57 54
WEATHER COV.....CHANCE S CHC CHANCE CHANCE
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR NONE NONE
TSTM COV........
CWR.............40 20 40 40 10 0
CHC OF THDR (%).0 10 10 10 10 0
TEMP............56 52 51 50 49 48
RH..............62 77 80 83 93 96
20 FT WIND......W 14 W 14 W 12 W 10 NW 9 NW 8
20 FT WIND GUST.30 29 26 24 22 20
MIX HGT (FT)....2800 600 400 300 400 300
TRANSPORT WIND..SW 22 SW 20 W 20 W 17 W 17 NW 16
VRATE KT-FT/1K..53 9 7 5 6 4
VENTRATE CAT....FAIR POOR POOR POOR POOR POOR
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........40 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 6 TO 7 MPH SHIFTING TO THE
SOUTHWEST AROUND 6 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......5100 FT AGL.
TRANSPORT WINDS.....NORTHWEST 8 TO 16 MPH DECREASING TO AROUND 6
MPH EARLY IN THE AFTERNOON, THEN SHIFTING TO
THE WEST 6 TO 10 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3100 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (42800 KNOT-FT) IN THE
AFTERNOON.
TIME (EDT) 6 AM 9 AM NOON 3 PM
SKY (%).........59 59 34 27
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0
CHC OF THDR (%).0 0 0 0
TEMP............46 47 59 65
RH..............96 93 55 40
20 FT WIND......NW 7G18 NW 6G15 NW 6G15 W 6G14
MIX HGT (FT)....300 600 2300 4900
TRANSPORT WIND..NW 16 N 12 N 6 W 7
VRATE KT-FT/1K..4 6 12 30
VENTRATE CAT....POOR POOR POOR POOR
FORECASTER...BELAK
REQUESTED BY...AARON STROBEL
TYPE OF REQUEST...PRESCRIBED
.TAG 2606714.0/LWX
.DELDT 03/20/26
.FORMATTERVERSION 2.0.0
.EMAIL JAMES.COLLETT@USDA.GOV,AARON.P.STROBEL@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page