Suppression Forecast Issued by NWS Sterling, VA
000
FNUS71 KLWX 262109
FWSLWX
Spot Forecast for Castle...Monogahela NF
National Weather Service Baltimore MD/Washington DC
509 PM EDT Thu Apr 26 2018
Forecast is based on request time of 1800 EDT on April 26.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
Low pressure will approach the area tonight before passing through
Friday. A period of soaking rain is expected late tonight through
Friday morning ahead of the low. Drier conditions will gradually
return Friday afternoon through Friday night behind the departing
low.
A cold front will pass through the area Saturday and high pressure
will return for Sunday and Monday with dry and cool conditions for
this time of year. The high will move offshore during the middle
portion of next week and a southwest flow will cause a big warmup
in temperatures.
.TONIGHT...
Sky/weather.........Partly cloudy (45-55 percent) then becoming
cloudy (85-95 percent). Rain overspreading the
area after midnight. Patchy fog after midnight.
CWR.................0 percent increasing to 90 percent.
Min temperature.....Around 45.
Max humidity........83 percent.
Wind (20 ft)........Light winds.
Mixing height.......3600-5300 ft AGL decreasing to 1100-2700 ft AGL
in the late evening and overnight.
Transport winds.....Northeast 5 to 9 mph.
Smoke dispersal.....Poor to fair (7700-21200 knot-ft).
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........50 100 100 100 100 100
WEATHER COV..... S CHC S CHC CHANCE DEFNTE DEFNTE
WEATHER TYPE....NONE RAIN RAIN RAIN RAIN RAIN
CWR.............0 20 20 40 90 90
TEMP............64 59 55 52 50 48
RH..............40 49 57 63 68 77
20 FT WIND......W 3 NE 3 NE 3 NE 3 NE 3 N 3
20 FT WIND GUST.5 4 5 4 4
MIX HGT (FT)....5300 4500 2700 1600 1600 1200
MIXNG WIND......SW 5 S 5 SE 7 E 9 E 9 NE 8
VRATE KT-FT/100021 18 16 13 13 8
.FRIDAY...
Sky/weather.........Mostly cloudy (80-90 percent). Patchy fog in
the morning. Rain in the morning, then chance
of rain showers in the afternoon.
CWR.................90 percent decreasing to 40 percent.
Max temperature.....Around 63.
Min humidity........56 percent.
Wind (20 ft)........Light winds becoming west 5 to 6 mph late in
the afternoon.
Mixing height.......1100-2300 ft AGL increasing to 6200-7100 ft
AGL.
Transport winds.....Northwest 3 to 10 mph shifting to the west 14
to 16 mph early in the afternoon.
Smoke dispersal.....Poor to good (6700-44900 knot-ft) increasing to
excellent (74600 knot-ft) early in the
afternoon.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........96 100 100 98 91 72
WEATHER COV.....DEFNTE LIKELY LIKELY CHANCE CHANCE CHANCE
WEATHER TYPE....RAIN RAIN RAIN RAIN RNSHWR RNSHWR
CWR.............90 70 70 40 40 40
TEMP............47 49 55 59 61 62
RH..............79 80 72 64 60 56
20 FT WIND......N 3 N 2 N 3 NW 3 NW 4 W 6
20 FT WIND GUST.4 5 6 7
MIX HGT (FT)....1100 1300 1700 3500 6200 7100
MIXNG WIND......NE 8 N 8 NW 5 NW 6 W 14 W 16
VRATE KT-FT/10008 9 7 18 75 100
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (55-65 percent) then becoming
partly cloudy (35-45 percent). Chance of rain
showers early in the evening.
CWR.................40 percent decreasing to 10 percent.
Min temperature.....Around 44.
Max humidity........79 percent.
Wind (20 ft)........West winds 5 to 6 mph early in the evening
becoming light.
Mixing height.......4400-6300 ft AGL decreasing to 2000-3700 ft AGL
in the late evening and overnight.
Transport winds.....West 16 to 20 mph.
Smoke dispersal.....Good to excellent (41000-88300 knot-ft)
decreasing to good (31600 knot-ft) after
midnight.
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........61 44 32 28 26 32
WEATHER COV.....CHANCE S CHC S CHC
WEATHER TYPE....RNSHWR RNSHWR RNSHWR NONE NONE NONE
CWR.............40 20 20 10 10 10
TEMP............60 56 53 50 48 47
RH..............58 64 69 71 74 74
20 FT WIND......W 6 W 4 W 4 W 4 SW 3 SW 4
20 FT WIND GUST.7 6 6 6 6 7
MIX HGT (FT)....6300 4400 3100 2200 2000 2500
MIXNG WIND......W 16 W 16 W 17 W 18 W 18 W 18
VRATE KT-FT/100088 62 46 35 32 39
$$
Forecaster...Martin
Requested by...Peter To
Type of request...WILDFIRE
.TAG 1808016.0/LWX