005
FNUS71 KLWX 201350
FWSLWX
SPOT FORECAST FOR BIG LEVELS FIRE...USDA FOREST SERVICE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
850 AM EST FRI DEC 20 2024
FORECAST IS BASED ON FORECAST START TIME OF 0900 EST ON DECEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
AN AREA OF LOW PRESSURE AND COLD FRONT WILL IMPACT THE AREA TODAY
INTO EARLY SATURDAY, BRINGING PERIODS OF LIGHT RAIN AND SNOW. PRECIPITATION WILL
REMAIN IN THE FORM OF SPRINKLES OR FLURRIES THIS MORNING BEFORE TRANSITIONING
OVER TO LIGHT SCATTERED SHOWERS WITH A FEW SNOWFLAKES MIXED IN LATER THIS
MORNING AND INTO THE AFTERNOON AS THE MAIN WAVE OF ENERGY SWEEPS THROUGH.
PRECIPITATION AMOUNTS WILL BE FAIRLY LIMITED TO A FEW ONE HUNDREDTHS
ACROSS THE FIRE LOCATION. HIGH TEMPERATURES TODAY WILL TOP OUT AROUND 35 DEGREES
WITH LIGHT WEST WINDS AT 5 TO 10 MPH. MINIMUM RELATIVE HUMIDITY VALUES WILL
BOTTOM OUT BETWEEN 85 TO 90 PERCENT.
THESE VALUES RECOVER BACK BETWEEN 90 TO 100 PERCENT TONIGHT WITH A FEW LINGERING
SPRINKLES BEFORE MIDNIGHT. LOWS WILL FALL BACK AROUND 25 DEGREES UNDER
PARTLY CLOUDY SKIES.
SUNNY SKIES AND BREEZY CONDITIONS ARE EXPECTED SATURDAY UNDER POST WEST
TO NORTHWEST FLOW. HIGHS WILL STRUGGLE TO MAKE 30 DEGREES WITH WIND GUSTS
BETWEEN 30 TO 35 MPH. HIGHEST WINDS WILL OCCUR LATE MORNING AND EARLY AFTERNOON
DUE TO MIXING. WITH THE COLD TEMPERATURES AND ADDED WIND EXPECT WIND CHILLS
IN THE TEENS THROUGHOUT THE DAY,
EVEN COLDER WEATHER ARRIVES SUNDAY WITH LESS WIND AS HIGH PRESSURE SETTLES
OVER THE REGION. DRY CONDITIONS CONTINUE THROUGH MONDAY WITH PRECIPITATION
CHANCES INCREASING FOR THE MIDDLE OF NEXT WEEK.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT SHADING). SLIGHT CHANCE OF
RAIN AND SNOW IN THE AFTERNOON.
CWR.................10 PERCENT INCREASING TO 20 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 35.
MIN HUMIDITY........85 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 MPH IN
THE LATE MORNING, THEN SHIFTING TO THE
WEST 5 TO 10 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 5 TO 6 MPH SHIFTING TO THE WEST 6 TO
8 MPH EARLY IN THE AFTERNOON, THEN SHIFTING TO
THE NORTHWEST 8 TO 10 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3900 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (15600 KNOT-FT) IN THE
AFTERNOON.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHWEST UP TO 4 MPH IN
THE LATE MORNING AND EARLY AFTERNOON, THEN
SHIFTING TO THE WEST LATE IN THE AFTERNOON.
TIME (EST) 9 AM 11 AM 1 PM 3 PM 5 PM
SKY (%).........79 75 77 76 73
WEATHER COV..... S CHC S CHC S CHC
WEATHER TYPE....NONE NONE SNOW SNOW RNSN
TSTM COV........
CWR.............10 10 20 20 20
TEMP............30 31 33 33 33
RH..............88 96 89 85 89
20 FT WIND......SW 3 SW 5 W 6 W 6 W 7
20 FT WIND GUST.7 8 10 12 12
EYE LEVEL WIND..SW 2 SW 3 W 4 W 4 W 4
EYE LVL WND GST.4 5 6 7 7
MIX HGT (FT)....1000 1400 2000 1900 1300
TRANSPORT WIND..SE 5 S 6 W 7 W 9 NW 8
VRATE KT-FT/1K..4 7 12 16 9
VENTRATE CAT....POOR POOR POOR POOR POOR
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT SHADING) THEN BECOMING
PARTLY CLOUDY (30-40 PERCENT SHADING). SLIGHT CHANCE OF
SNOW EARLY IN THE EVENING.
CWR.................20 PERCENT DECREASING TO 10 PERCENT IN THE LATE
EVENING AND OVERNIGHT.
MIN TEMPERATURE.....AROUND 25.
MAX HUMIDITY........92 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 7 TO 14 MPH. GUSTS UP TO 31
MPH.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....NORTHWEST 2 TO 9 MPH INCREASING TO 16 TO 21 MPH
AFTER 3 AM.
SMOKE DISPERSAL.....FAIR (23800 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (200 KNOT-FT) LATE IN THE
NIGHT.
EYE LEVEL WINDS.....NORTHWEST WINDS UP TO 8 MPH. GUSTS UP TO 31
MPH.
TIME (EST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........72 59 37 32 29 28
WEATHER COV.....S CHC S CHC
WEATHER TYPE....SNOW SNOW NONE NONE NONE NONE
TSTM COV........
CWR.............20 20 10 10 10 10
TEMP............32 32 31 30 28 27
RH..............92 92 85 81 78 74
20 FT WIND......NW 7 NW 8 NW 9 NW 9 NW 13 NW 14
20 FT WIND GUST.14 16 18 21 26 31
EYE LEVEL WIND..NW 4 NW 5 NW 5 NW 5 NW 8 NW 8
EYE LVL WND GST.8 10 11 13 16 19
MIX HGT (FT)....900 300 200 100 600 1300
TRANSPORT WIND..NW 7 NW 5 NW 3 NW 2 NW 9 NW 21
VRATE KT-FT/1K..5 1 1 0 5 24
VENTRATE CAT....POOR POOR POOR POOR POOR POOR
SATURDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT SHADING).
CWR.................10 PERCENT.
MAX TEMPERATURE.....AROUND 28.
MIN HUMIDITY........46 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 13 TO 16 MPH WITH GUSTS TO
AROUND 33 MPH.
MIXING HEIGHT.......5000 FT AGL.
TRANSPORT WINDS.....NORTHWEST 18 TO 22 MPH BECOMING 20 TO 21 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (7400 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (125200 KNOT-FT) IN THE AFTERNOON.
EYE LEVEL WINDS.....NORTHWEST WINDS 8 TO 10 MPH WITH GUSTS TO
AROUND 19 MPH.
TIME (EST) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........20 17 19 26 24 15
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............10 0 0 0 0 0
TEMP............25 25 26 27 27 25
RH..............74 62 57 50 46 50
20 FT WIND......NW 14 NW 16 NW 15 NW 14 NW 14 NW 13
20 FT WIND GUST.32 32 32 30 28 28
EYE LEVEL WIND..NW 8 NW 10 NW 9 NW 8 NW 8 NW 8
EYE LVL WND GST.19 19 19 18 17 17
MIX HGT (FT)....500 1500 4300 5000 4900 4200
TRANSPORT WIND..NW 20 NW 22 NW 32 NW 29 NW 24 NW 21
VRATE KT-FT/1K..8 29 115 120 97 75
VENTRATE CAT....POOR POOR VYGD VYGD GOOD GOOD
FORECASTER...TAYLOR
REQUESTED BY...MATHIAS CUISON
TYPE OF REQUEST...WILDFIRE
.TAG 2428590.3/LWX
.DELDT 12/20/24
.FORMATTERVERSION 2.0.0
.EMAIL MATHIAS.CUISON@USDA.GOV,MARCUS.SEWELL@USDA.GOV
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