Suppression Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
903
FNUS71 KLWX 200941
FWSLWX
Spot Forecast for Hone Quarry...USFS
National Weather Service Baltimore MD/Washington DC
541 AM EDT Sun Apr 20 2025
Forecast is based on ignition time of 0500 EDT on April 20.
If conditions become unrepresentative...contact the National Weather
Service.
Please contact our office if you have questions
or concerns with this forecast.
.DISCUSSION...
Winds will shift to out of the northwest over the next couple
hours behind a cold front. Winds will be lighter today, but will
gradually shift throughout the day from northwest to northeast to
southeast. RHs are currently in the 70-80% range, but will
decrease during the afternoon to around 55-60%. A shower or
thunderstorm may also be possible during the afternoon or evening
hours (around 20 percent chance).
.REST OF TONIGHT...
Sky/weather.........Cloudy (85-95 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 57.
Max humidity........86 percent.
Wind (20 ft)........Northwest winds around 10 mph.
Mixing height.......100 ft AGL.
Transport winds.....Northwest around 14 mph.
Smoke dispersal.....Poor (1000 knot-ft).
TIME (EDT) 5AM
Sky (%).........88
Weather cov.....
Weather type....
Tstm cov........
CWR.............0
Chc of thdr (%).0
Temp............59
RH..............80
20 FT wind dir..NW
20 FT wind spd..10
20 FT wind gust.20
Mix hgt (kft)...0.1
Transp wind dir.NW
Transp wind spd.14
Vrate kt-ft/1K..1
Ventrate Cat....PR
.TODAY...
Sky/weather.........Mostly cloudy (70-80 percent). Isolated rain
showers late in the afternoon. Scattered rain
showers and isolated thunderstorms late in the
afternoon.
CWR.................10 percent increasing to 40 percent.
Chance of thunder...19 percent.
Max temperature.....Around 72.
Min humidity........51 percent.
Wind (20 ft)........Northwest winds 5 to 9 mph shifting to the
south around 6 mph early in the afternoon, then
shifting to the southeast 6 to 7 mph late in
the afternoon. Gusty and erratic winds expected
near thunderstorms late in the afternoon.
Mixing height.......4800 ft AGL.
Transport winds.....Northwest 9 to 15 mph shifting to the south 9
to 10 mph late in the afternoon.
Smoke dispersal.....Poor (600 knot-ft) early in the morning
increasing to good (33900 knot-ft) in the
afternoon.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
Sky (%).........90 92 74 67 54 68
Weather cov..... ISOLTD ISOLTD
Weather type....NONE NONE NONE NONE RNSHWR RNSHWR
Tstm cov........
CWR.............0 0 0 10 20 20
Chc of thdr (%).0 0 0 0 0 0
Temp............57 57 61 68 71 70
RH..............86 86 75 57 51 57
20 ft wind......NW 9 NW 8 NW 6 W 5 S 6 SE 6
20 ft wind gust.17 16 13 12 13 14
Mix hgt (ft)....100 500 1200 3100 4500 4000
Transport wind..NW 14 N 15 NW 13 NW 10 W 8 S 9
Vrate kt-ft/1K..1 6 14 28 31 32
Ventrate Cat....POOR POOR POOR POOR POOR POOR
.TONIGHT...
Sky/weather.........Mostly cloudy (80-90 percent). Slight chance of
thunderstorms in the evening. Scattered rain
showers through the night. Patchy fog late in
the evening.
CWR.................40 percent decreasing to 30 percent early in
the evening.
Chance of thunder...20 percent.
Min temperature.....Around 51.
Max humidity........96 percent.
Wind (20 ft)........Southeast winds 7 to 9 mph. Gusty and erratic
winds expected near thunderstorms in the
evening.
Mixing height.......100 ft AGL.
Transport winds.....Southeast 10 to 14 mph.
Smoke dispersal.....Fair (15000 knot-ft) early in the evening
decreasing to poor (500 knot-ft) late in the
night.
TIME (EDT) 6 PM 9 PM MIDNGT 3 AM
Sky (%).........80 83 87 86
Weather cov.....SCTTRD CHANCE CHANCE CHANCE
Weather type....RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........ISOLTD S CHC
CWR.............40 30 30 30
Chc of thdr (%).20 20 10 10
Temp............66 58 56 53
RH..............68 90 86 93
20 FT wind......SE 7G15 SE 8G17 SE 8G17 SE 9G18
Mix hgt (ft)....1400 100 100 200
Transport wind..SE 13 SE 10 SE 13 SE 14
Vrate kt-ft/1K..15 1 1 2
Ventrate Cat....POOR POOR POOR POOR
.MONDAY...
Sky/weather.........Cloudy (85-95 percent) then becoming partly
sunny (55-65 percent). Chance of rain showers
early in the morning. Slight chance of rain
showers late in the afternoon.
CWR.................30 percent decreasing to 20 percent.
Chance of thunder...14 percent.
Max temperature.....Around 69.
Min humidity........52 percent.
Wind (20 ft)........South winds 9 to 14 mph with gusts to around 28
mph.
Mixing height.......2700 ft AGL.
Transport winds.....South 12 to 21 mph shifting to the southwest
around 22 mph late in the afternoon.
Smoke dispersal.....Poor (900 knot-ft) early in the morning
increasing to good (50700 knot-ft) in the
afternoon.
TIME (EDT) 6 AM 10 AM 2 PM
Sky (%).........89 67 57
Weather cov.....CHANCE S CHC
Weather type....RNSHWR NONE RNSHWR
Tstm cov........
CWR.............30 10 20
Chc of thdr (%).0 0 10
Temp............51 56 66
RH..............96 83 58
20 FT wind......S 9G20 S 10G22 S 14G28
Mix hgt (ft)....100 500 2600
Transport wind..S 13 S 15 S 20
Vrate kt-ft/1K..2 6 43
Ventrate Cat....POOR POOR FAIR
$$
Forecaster...Belak
Requested by...Collett
Type of request...PRESCRIBED
.TAG 2511071.0/LWX
.DELDT 04/20/25
.FormatterVersion 2.0.0
.EMAIL jay.collett@usda.gov,Aaron.P.Strobel@usda.gov