Spot Forecast Issued by NWS Sterling, VA
000
FNUS71 KLWX 160857
FWSLWX
Spot Forecast for Evick Knob...USFS
National Weather Service Baltimore MD/Washington DC
457 AM EDT Tue Apr 16 2024
Forecast is based on ignition time of 0500 EDT on April 16.
If conditions become unrepresentative...contact the National Weather
Service.
Please contact our office if you have questions
or concerns with this forecast.
.DISCUSSION...
A cold front will slowly approach this location during the morning
hours before stalling nearby. The drier air behind this feature
will lower daytime RH values into the 30 to 35 percent range. By
later this afternoon and evening, the system should gradually push
across the Allegheny Highlands as a warm front. Being in close
proximity to the frontal boundary will yield scattered showers
along with isolated thunderstorms for this afternoon and early
evening. Gusty and erratic winds may accompany any of the stronger
storms.
A more widespread wetting rain is expected on Wednesday,
accompanied by a slight chance for some thunderstorms. South winds
will prevail through the period, with some increase in transport
winds on Wednesday afternoon.
A weak cold front tracks through on Thursday before a stronger
frontal system approaches the area by late in the work week. Above
normal temperatures are likely this week before turning cooler
this weekend.
.REST OF TONIGHT...
Sky/weather.........Mostly cloudy (60-70 percent).
CWR.................0 percent.
Min temperature.....Around 50.
Max humidity........77 percent.
Eye level winds.....Light winds.
Wind (20 ft)........Light winds.
Transport winds.....Northeast around 7 mph.
Smoke dispersal.....Poor (2200 knot-ft).
Haines Index........2 or very low potential for large plume
dominated fire growth.
TIME (EDT) 5AM
Sky (%).........63
Weather cov.....
Weather type....
Tstm cov........
CWR.............0
Temp............53
RH..............71
20 FT wind dir..N
20 FT wind spd..3
20 FT wind gust.5
Eye lvl wnd dir.N
Eye lvl wnd spd.2
Eye lvl wnd gst.3
Transp wind dir.NE
Transp wind spd.7
Haines index....2
Vrate kt-ft/1K..2
Ventrate Cat....PR
.TODAY...
Sky/weather.........Partly sunny (55-65 percent). Scattered rain
showers late in the afternoon. Isolated
thunderstorms late in the afternoon.
CWR.................0 percent increasing to 40 percent late in the
afternoon.
Max temperature.....Around 73.
Min humidity........35 percent.
Eye level winds.....Light winds becoming south up to 5 mph in the
late morning and afternoon.
Wind (20 ft)........Light winds becoming south 5 to 8 mph in the
late morning and afternoon. Gusty and erratic
winds expected near thunderstorms late in the
afternoon.
Transport winds.....Northeast 5 to 7 mph shifting to the southeast
3 to 7 mph late in the morning, then shifting
to the southwest 8 to 10 mph in the afternoon.
Smoke dispersal.....Poor (1900 knot-ft) early in the morning
increasing to good (31600 knot-ft) in the
afternoon.
Haines Index........2 to 5 or very low to moderate potential for
large plume dominated fire growth.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
Sky (%).........55 41 50 57 63 71
Weather cov..... SCTTRD SCTTRD
Weather type....NONE NONE NONE NONE RNSHWR RNSHWR
Tstm cov........ ISOLTD ISOLTD
CWR.............0 0 0 0 40 40
Temp............51 53 62 69 73 73
RH..............77 66 48 39 35 41
20 ft wind......NE 3 S 2 S 5 S 7 S 8 S 8
20 ft wind gust. 3 6 9 12 12
Eye level wind..NE 2 S 1 S 3 S 4 S 5 S 5
Eye lvl wnd gst. 2 4 5 7 7
Transport wind..NE 7 NE 5 SE 3 S 7 SW 10 SW 10
Haines index....2 2 3 4 5 5
Vrate kt-ft/1K..2 2 4 14 30 32
Ventrate Cat....POOR POOR POOR POOR POOR POOR
.TONIGHT...
Sky/weather.........Mostly cloudy (75-85 percent). Scattered
showers and isolated thunderstorms early in the
evening. Isolated rain showers overnight.
CWR.................40 percent decreasing to 20 percent in the evening
and overnight, then decreasing to 10 percent.
Min temperature.....Around 57.
Max humidity........90 percent.
Eye level winds.....South winds around 4 mph.
Wind (20 ft)........South winds 5 to 7 mph. Gusty and erratic winds
expected near thunderstorms in the evening.
Transport winds.....South 7 to 10 mph.
Smoke dispersal.....Fair (21400 knot-ft) early in the evening
decreasing to poor (1000 knot-ft) late in the
night.
Haines Index........2 to 5 or very low to moderate potential for
large plume dominated fire growth.
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
Sky (%).........79 86 79 75 74 79
Weather cov.....SCTTRD ISOLTD ISOLTD ISOLTD ISOLTD
Weather type....RNSHWR RNSHWR RNSHWR NONE RNSHWR RNSHWR
Tstm cov........SCTTRD ISOLTD ISOLTD
CWR.............40 20 20 10 20 20
Temp............69 64 61 58 58 57
RH..............51 63 72 80 77 86
20 ft wind......S 7 SW 6 S 6 S 6 S 7 S 7
20 ft wind gust.10 8 8 8 9 9
Eye level wind..S 4 SW 4 S 4 S 4 S 4 S 4
Eye lvl wnd gst.6 5 5 5 5 5
Transport wind..S 10 S 10 S 8 S 7 S 8 SW 8
Haines index....5 4 3 3 3 2
Vrate kt-ft/1K..21 5 2 1 1 1
Ventrate Cat....POOR POOR POOR POOR POOR POOR
.WEDNESDAY...
Sky/weather.........Mostly cloudy (80-90 percent). Chance of rain
showers early in the morning. Slight chance of
thunderstorms late in the afternoon.
CWR.................10 percent increasing to 50 percent.
Max temperature.....Around 72.
Min humidity........51 percent.
Eye level winds.....South winds up to 7 mph.
Wind (20 ft)........South winds 6 to 12 mph. Gusty and erratic
winds expected near thunderstorms late in the
afternoon.
Transport winds.....Southwest 6 to 14 mph increasing to 16 to 20
mph late in the afternoon.
Smoke dispersal.....Poor (500 knot-ft) early in the morning
increasing to good (35700 knot-ft) in the
afternoon.
Haines Index........2 to 4 or very low to low potential for large
plume dominated fire growth.
TIME (EDT) 6 AM 10 AM 2 PM
Sky (%).........85 92 84
Weather cov..... CHANCE CHANCE
Weather type....NONE RNSHWR RNSHWR
Tstm cov........ S CHC
CWR.............10 30 50
Temp............57 65 71
RH..............86 75 53
20 FT wind......S 7G9 SW 6G9 S 9G13
Eye level wind..S 4G5 SW 4G5 S 5G8
Transport wind..SW 7 SW 9 SW 14
Haines index....2 4 4
Vrate kt-ft/1K..1 5 12
Ventrate Cat....POOR POOR POOR
$$
Forecaster...Rubin-Oster
Requested by...Collett
Type of request...PRESCRIBED
.TAG 2411022.0/LWX
.DELDT 04/16/24
.FormatterVersion 2.0.0
.EMAIL Jay.Collett@usda.gov