697
FNUS71 KLWX 041708
FWSLWX

Spot Forecast for 4th of July...National Park Service
National Weather Service Baltimore MD/Washington DC
108 PM EDT Fri Jul 4 2025

Forecast is based on forecast start time of 2100 EDT on July 04.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...

Clear skies are expected this evening through tonight with
temperatures dropping from the upper 70s around the start of
the fireworks to the low 70s by midnight. Expect lows tonight
to drop down into the mid 60s by Saturday morning. Winds will
remain very light during this period. As the sun sets, a
stout inversion will set up around 500 ft above ground level.

The inversion will break down by mid-morning on Saturday,
which will be followed by another dry and quiet day across
the region. High temperatures will reach the upper 80s, with
another low humidity day expected.

Sunday will be much of the same, albeit slightly more warm
and humid. There is a non-zero for an afternoon/evening
thunderstorm, but chances remain around 10 percent at most
at this time.

.REST OF TONIGHT...

Sky/weather.........Clear (0-10 percent).
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 66.
Max humidity........87 percent.
Surface winds (mph).Light winds.

TIME (EDT)      9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........5   3   5   0   1   4   5   8   6
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0
Temp............79  76  73  71  70  69  68  68  67
RH..............52  60  66  71  73  76  81  81  84
Surface wnd dir.NE  NE  E   E   NE  NE  NE  N   NE
Surface wnd spd.2   2   1   1   1   1   1   1   1
Surface wnd gst.5   3   3   2   2   2   2   2   2

.SATURDAY...

Sky/weather.........Sunny (10-20 percent).
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 89.
Min humidity........42 percent.
Surface winds (mph).Light winds becoming south 5 to 7 mph in the
                    afternoon.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........8   10  11  10  9   8   9   9   10  15  19  24
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............66  68  70  75  79  84  85  87  89  89  89  87
RH..............87  84  84  71  62  51  50  45  42  42  42  45
Surface wnd dir.N   NE  E   SE  S   S   S   S   S   S   S   S
Surface wnd spd.0   1   1   1   2   3   5   5   6   7   7   7
Surface wnd gst.2   2   2   3   5   6   7   7   8   9   9   10

.SATURDAY NIGHT...

Sky/weather.........Mostly clear (10-20 percent).
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 68.
Max humidity........84 percent.
Surface winds (mph).South winds 5 to 7 mph in the evening becoming
                    light.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........21  18  15  14  13  12  13  14  15  15  14  14
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............86  84  82  80  77  75  74  73  72  70  69  68
RH..............46  51  55  58  64  69  71  73  76  81  81  84
Surface wnd dir.S   S   S   S   S   S   S   S   S   S   S   S
Surface wnd spd.7   6   6   6   5   5   5   3   3   3   2   2
Surface wnd gst.10  10  10  10  9   9   8   8   7   7   7   7

.SUNDAY...

Sky/weather.........Sunny (20-30 percent).
Chance of pcpn......10 percent.
Chance of thunder...5 percent.
Max temperature.....Around 91.
Min humidity........45 percent.
Surface winds (mph).Light winds becoming south 5 to 8 mph in the
                    late morning and afternoon.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........12  11  9   9   8   8   13  17  22  28  33  39
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   10  10  10  10
Chc of thdr (%).0   0   0   0   0   0   0   0   10  10  10  10
Temp............69  70  73  76  80  83  86  88  89  90  90  89
RH..............81  81  76  71  65  59  53  48  47  45  45  48
Surface wnd dir.S   S   S   S   S   S   S   S   S   S   S   S
Surface wnd spd.2   2   2   3   5   6   6   7   7   7   8   8
Surface wnd gst.7   7   7   7   8   9   10  12  13  14  14  14

$$
Forecaster...Ledbetter
Requested by...Katie Keller
Type of request...OTHER
.TAG 2517318.0/LWX
.DELDT 07/04/25
.FormatterVersion 2.0.0
.EMAIL kathryn_keller@nps.gov