594
FNUS71 KLWX 222030
FWSLWX
SPOT FORECAST FOR BLACK LINE NORTH RIVER...USFS
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
430 PM EDT SUN MAR 22 2026
FORECAST IS BASED ON IGNITION TIME OF 1700 EDT ON MARCH 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
VERY WARM THIS AFTERNOON WITH HIGH TEMPERATURES IN THE LOW 80S AND
RELATIVE HUMIDITY DROPPING TO THE MID 20S ALONG WITH A GUSTY SSW
WIND OF 25 MPH.
A STRONG COLD FRONT WILL PASS THROUGH TONIGHT BRINGING SHOWERS
AND THUNDERSTORMS. AREAS WITH THE GREATEST LIKELIHOOD TO SEE A
WETTING RAIN ARE ALONG AND NORTH OF US-50 TOWARDS THE MASON-
DIXON.
EXPECT GUSTY NORTHWEST WINDS MONDAY BEHIND A STRONG COLD FRONT.
GUSTS OF 20 TO 25 MPH CAN BE EXPECTED ON THE VALLEY FLOOR WITH 30 TO
35 MPH (LOCALLY HIGHER) ALONG THE RIDGES. SKIES WILL TREND PARTLY TO
MOSTLY CLOUDY TO START BEFORE BECOMING MOSTLY SUNNY IN THE AFTERNOON
WITH HIGHS IN THE LOW 60S. MINIMUM RELATIVE HUMIDITY VALUES WILL
FALL INTO THE 25 TO 30 PERCENT RANGE WITHIN A WELL MIXED ENVIRONMENT.
COOLER (NEAR NORMAL) TEMPERATURES WILL RETURN TUESDAY INTO
WEDNESDAY. HIGH PRESSURE SHIFTING OFFSHORE WILL RESULT IN SOUTHERLY
RETURN FLOW BY LATE TUESDAY AFTERNOON. AFTER A COUPLE OF DRY DAYS,
RELATIVE HUMIDITY WILL FALL TO 35 TO 40 PERCENT EACH AFTERNOON, WITH
OVERNIGHT RECOVERIES AROUND 70 PERCENT TUESDAY NIGHT/EARLY WEDNESDAY
MORNING. THE CHANCE FOR WETTING RAINS IS VERY LOW - LESS THAN 10
PERCENT. WIND GUSTS COULD APPROACH 20 MPH WEDNESDAY AFTERNOON.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT). SCATTERED RAIN
SHOWERS AFTER 3 AM. ISOLATED THUNDERSTORMS
AFTER 3 AM. NUMEROUS RAIN SHOWERS EARLY IN THE
MORNING.
CWR.................30 PERCENT INCREASING TO 40 PERCENT AFTER 3 AM,
THEN INCREASING TO 70 PERCENT AFTER 3 AM
INCREASING TO 60 PERCENT EARLY IN THE MORNING.
CHANCE OF THUNDER...24 PERCENT.
TEMPERATURE.........MIN 45.
RH..................MAX 100 PERCENT.
WIND (20 FT)........WEST WINDS 12 TO 16 MPH SHIFTING TO THE
NORTHWEST 13 TO 15 MPH AFTER 3 AM. GUSTS UP TO
30 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS AFTER 3 AM.
MIXING HEIGHT.......300 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 23 MPH SHIFTING TO THE NORTHWEST 15
TO 18 MPH AFTER 3 AM.
SMOKE DISPERSAL.....EXCELLENT (86400 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (3500 KNOT-FT) LATE IN THE
NIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........20 34 47 45 46 50 45 65 80 87 89 89
WEATHER COV..... SCT SCT NUM
WEATHER TYPE.... RW RW RW
TSTM COV........ ISO ISO ISO
CWR.............0 0 0 0 0 0 10 20 30 40 70 60
CHC OF THDR (%).0 0 0 20 20 20 20 20 20 20 20 20
TEMP............75 71 68 65 65 63 62 61 60 59 57 56
RH..............34 41 47 56 56 65 67 70 78 80 90 90
20 FT WIND DIR..SW W W W W W W W W NW NW NW
20 FT WIND SPD..16 14 12 13 13 13 13 14 14 15 14 13
20 FT WIND GUST.29 25 22 23 24 24 25 28 28 29 30 29
MIX HGT (KFT)...4.3 0.8 0.3 0.3 0.3 0.3 0.3 0.4 0.6 0.5 0.5 0.5
TRANSP WIND DIR.W SW W W W W W W W W NW NW
TRANSP WIND SPD.23 16 15 15 16 16 16 16 17 16 15 18
VRATE KT-FT/1K..86 12 4 4 5 4 5 6 9 7 6 8
VENTRATE CAT....GD PR PR PR PR PR PR PR PR PR PR PR
MONDAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT) THEN BECOMING
SUNNY (10-20 PERCENT). SCATTERED RAIN SHOWERS
AND ISOLATED THUNDERSTORMS EARLY IN THE
MORNING, THEN ISOLATED RAIN SHOWERS EARLY IN
THE MORNING.
CWR.................30 PERCENT DECREASING TO 10 PERCENT.
CHANCE OF THUNDER...16 PERCENT.
TEMPERATURE.........MAX 53.
RH..................MIN 44 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 12 TO 18 MPH WITH GUSTS TO
AROUND 32 MPH. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE MORNING.
MIXING HEIGHT.......3300 FT AGL.
TRANSPORT WINDS.....NORTHWEST 15 TO 23 MPH INCREASING TO 26 TO 29
MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (5200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (82900 KNOT-FT) IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........85 69 59 53 41 19 20 14 8 6 5 9
WEATHER COV.....SCT ISO
WEATHER TYPE....RW RW
TSTM COV........ISO
CWR.............30 20 10 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).20 10 0 0 0 0 0 0 0 0 0 0
TEMP............51 50 50 46 48 49 51 50 49 49 48 46
RH..............100 100 96 100 86 71 59 52 48 46 44 45
20 FT WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..12 13 13 15 16 17 18 18 15 15 15 15
20 FT WIND GUST.24 29 26 28 30 31 32 32 32 31 31 32
MIX HGT (KFT)...0.4 0.7 0.8 1.7 1.9 2.2 2.3 2.4 2.5 2.8 3.1 3.3
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.15 15 16 21 22 23 26 28 29 29 29 29
VRATE KT-FT/1K..5 10 12 31 37 43 53 57 64 71 78 83
VENTRATE CAT....PR PR PR PR PR FR FR FR GD GD GD GD
FORECASTER...ROSA
REQUESTED BY...AARON STROBEL
TYPE OF REQUEST...PRESCRIBED
.TAG 2607146.0/LWX
.DELDT 03/22/26
.FORMATTERVERSION 2.0.0
.EMAIL AARON.P.STOBEL@USDA.GOV,VAVIC@FIRENET.GOV
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