280
FNUS71 KLWX 092037
FWSLWX

Spot Forecast for Brandywine Campground...USFS
National Weather Service Baltimore MD/Washington DC
437 PM EDT Sun Mar 9 2025

Forecast is based on ignition time of 1700 EDT on March 09.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

.DISCUSSION...

...ELEVATED THREAT FOR RAPID FIRE SPREAD CONTINUES THIS
AFTERNOON...

Sustained west winds continue to decrease this afternoon, with
sustained winds around 10-15mph and gusting up to 25-30mph at the
burn site. Minimum relative humidity values around 25-30 percent
for the rest of this afternoon, then recovering to 60-70 percent
tonight. Temperatures tonight fall to the low 30s.

Winds gradually decrease tonight, with sustained west winds
around 5-10 mph. Gusts drop off after 7pm to around 10-15 mph.

Lighter winds are expected Monday. Continued dry conditions and
temperatures jumping to around 60 degrees. Minimum relative
humidity humidity values around 30-35 percent, with light/variable
wind around 5 mph (varying from west to north). Skies mostly
sunny to partly cloudy as high pressure builds over the region. Smoke
dispersion is forecast to be fair Monday.

Looking to the rest of the week ahead, RHs will gradually rise in
south to southwest flow ahead of an approaching frontal system
late week. Winds gradually increase each day through the end of
the week, but no day looks to have winds that are overly
concerning until perhaps Friday. However, the increasing humidity
should help to quell the wildfire risk during this time.

Significant wetting rain looking more likely next weekend.

.REST OF TODAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Max temperature.....Around 54.
Min humidity........31 percent.
Wind (20 ft)........West winds around 10 mph with gusts to around
                    23 mph.
Mixing height.......4100 ft AGL.
Transport winds.....West around 16 mph.
Smoke dispersal.....Good (58100 knot-ft).

TIME (EDT)      5 PM
Sky (%).........12
Weather cov.....
Weather type....NONE
Tstm cov........
CWR.............0
Temp............54
RH..............31
20 ft wind......W 10
20 ft wind gust.23
Mix hgt (ft)....4100
Transport wind..W 16
Vrate kt-ft/1K..58
Ventrate Cat....FAIR

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Min temperature.....Around 32.
Max humidity........69 percent.
Wind (20 ft)........West winds 5 to 8 mph with gusts to around 20
                    mph early in the evening becoming light.
Mixing height.......0 ft AGL.
Transport winds.....West 6 to 12 mph.
Smoke dispersal.....Fair (28700 knot-ft) early in the evening
                    decreasing to poor (0 knot-ft) late in the
                    night.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........29     14     17     16     5      17
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............52     43     39     36     35     34
RH..............32     49     57     59     59     66
20 ft wind......W 8    W 5    SW 3   SW 3   SW 3   SW 3
20 ft wind gust.20     12     10     9      9      8
Mix hgt (ft)....2900   100    BLW100 100    200    200
Transport wind..W 12   W 5    W 5    W 6    W 7    W 6
Vrate kt-ft/1K..29     1      0      1      1      1
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR

.MONDAY...

Sky/weather.........Sunny (20-30 percent).
CWR.................0 percent.
Max temperature.....Around 61.
Min humidity........33 percent.
Wind (20 ft)........Light winds becoming north around 5 mph late in
                    the afternoon.
Mixing height.......4000 ft AGL.
Transport winds.....West 5 to 8 mph shifting to the northwest 6 to
                    8 mph late in the morning, then becoming variable
at 5 mph or less in the afternoon.
Smoke dispersal.....Poor (100 knot-ft) early in the morning
                    increasing to fair (14500 knot-ft) in the
                    afternoon.

TIME (EDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........8         9         39        23
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
CWR.............0         0         0         0
Temp............33        37        54        60
RH..............69        67        41        34
20 FT wind......SW 2G8    SW 2G7    W 2G7     N 5G8
Mix hgt (ft)....100       500       2500      4000
Transport wind..W 5       W 6       NW 6      SE 2
Vrate kt-ft/1K..0         3         13        8
Ventrate Cat....POOR      POOR      POOR      POOR

$$
Forecaster...Rodriguez
Requested by...Aaron Strobel
Type of request...PRESCRIBED
.TAG 2505462.0/LWX
.DELDT 03/09/25
.FormatterVersion 2.0.0
.EMAIL James.Collett@usda.gov,Colten.Moor@usda.gov,aaron.p.strobel@usda.gov