Spot Forecast
Issued by NWS Sterling, VA

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FNUS71 KLWX 192005
FWSLWX

Spot Forecast for Mills RX...USFS
National Weather Service Baltimore MD/Washington DC
405 PM EDT Fri Apr 19 2024

Forecast is based on ignition time of 0800 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...

Clouds will be on the decrease Saturday, with sunny skies expected
during the afternoon. Min RH values are expected to be around 30
percent, and winds will be out of the northwest. Gusts of 15-25 mph
will be possible during the afternoon hours. Relative humidity values
only rebound to around 55-60 percent Saturday night, and winds will
remain out of the northwest. Lighter north to northwest winds are
expected on Sunday. Mostly cloudy skies are forecast, along with
Min RH values in the mid to upper 30s.

.SATURDAY...

Sky/weather.........Partly sunny (45-55 percent) then becoming
                    sunny (15-25 percent).
CWR.................0 percent.
Max temperature.....Around 67.
Min humidity........30 percent.
Eye level winds.....Northwest winds 5 to 7 mph shifting to the west
                    7 to 8 mph in the afternoon.
Wind (20 ft)........Northwest winds 9 to 14 mph.
Transport winds.....North around 9 mph shifting to the west 8 to 16
                    mph in the late morning and early afternoon,
                    then increasing to 18 to 20 mph late in the
                    afternoon.
Smoke dispersal.....Poor (9800 knot-ft) early in the morning
                    increasing to excellent (107400 knot-ft) in the
                    afternoon.
Haines Index........3 to 6 or very low to high potential for large
                    plume dominated fire growth.

TIME (EDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........75  68  57  48  40  29  21  19  19  19
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0
Temp............55  56  58  60  62  64  65  65  65  64
RH..............74  72  62  53  44  38  33  33  30  30
20 FT wind dir..N   NW  NW  NW  NW  W   W   W   W   W
20 FT wind spd..8   9   9   10  12  12  13  13  14  14
20 FT wind gust.13  14  15  16  17  18  20  21  22  22
Eye lvl wnd dir.N   NW  NW  NW  NW  W   W   W   W   W
Eye lvl wnd spd.5   5   5   6   7   7   8   8   8   8
Eye lvl wnd gst.8   8   9   10  10  11  12  13  13  13
Transp wind dir.N   N   NW  W   W   W   W   W   W   W
Transp wind spd.9   9   8   8   10  14  16  18  20  20
Haines index....3   3   3   3   4   4   5   6   6   6
Vrate kt-ft/1K..10  15  18  23  39  63  83  101 107 97
Ventrate Cat....PR  PR  PR  PR  PR  GD  GD  VGD VGD GD

.SATURDAY NIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (50-60 percent).
CWR.................0 percent.
Min temperature.....Around 40.
Max humidity........57 percent.
Eye level winds.....Northwest winds up to 8 mph.
Wind (20 ft)........Northwest winds 5 to 13 mph.
Transport winds.....Northwest 9 to 16 mph shifting to the north 7
                    to 9 mph overnight.
Smoke dispersal.....Good (56100 knot-ft) early in the evening
                    decreasing to poor (0 knot-ft) late in the
                    night.
Haines Index........3 to 6 or very low to high potential for large
                    plume dominated fire growth.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........21     32     45     58     57     54
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............63     57     52     48     46     44
RH..............31     37     43     49     51     55
20 ft wind......NW 13  NW 9   NW 8   NW 8   NW 7   NW 5
20 ft wind gust.20     15     14     13     10     8
Eye level wind..NW 8   NW 5   NW 5   NW 5   NW 4   NW 3
Eye lvl wnd gst.12     9      8      8      6      5
Transport wind..W 16   NW 10  NW 9   N 10   N 9    N 7
Haines index....6      5      4      3      3      4
Vrate kt-ft/1K..56     3      0      3      2      1
Ventrate Cat....FAIR   POOR   POOR   POOR   POOR   POOR

.SUNDAY...

Sky/weather.........Partly sunny (60-70 percent).
CWR.................10 percent.
Max temperature.....Around 58.
Min humidity........38 percent.
Eye level winds.....Light winds becoming north around 3 mph early
                    in the morning, then shifting to the west up to
                    5 mph in the late morning and afternoon.
Wind (20 ft)........Light winds becoming north around 5 mph early
                    in the morning, then shifting to the west 6 to
                    8 mph in the late morning and afternoon.
Transport winds.....North 3 to 8 mph shifting to the west 2 to 8
                    mph late in the morning.
Smoke dispersal.....Poor (5200 knot-ft) early in the morning
                    increasing to good (42400 knot-ft) in the
                    afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........54     56     65     75     78     69
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      10     10     10     10     10
Temp............43     45     48     52     55     56
RH..............57     53     49     44     40     38
20 ft wind......N 3    N 5    W 6    SW 7   W 8    W 8
20 ft wind gust.7      7      10     13     14     14
Eye level wind..N 2    N 3    W 4    SW 4   W 5    W 5
Eye lvl wnd gst.4      4      6      8      8      8
Transport wind..N 7    NE 8   NW 3   NW 3   W 7    W 8
Haines index....4      4      4      4      4      5
Vrate kt-ft/1K..5      16     10     13     31     42
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   FAIR

$$
Forecaster...Pallozzi
Requested by...Christopher Schultz
Type of request...PRESCRIBED
.TAG 2411298.2/LWX
.DELDT 04/19/24
.FormatterVersion 2.0.0
.EMAIL Christopher.schultz@usda.gov


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