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Arlington, Virginia 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Fort Myer VA
National Weather Service Forecast for:
Fort Myer VA
Issued by: National Weather Service Baltimore, MD/Washington, D.C. |
| Updated: 4:53 pm EDT Aug 19, 2026 |
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Tonight
 Partly Cloudy
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Thursday
 Chance Showers then Showers
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Thursday Night
 Showers Likely then Chance Showers
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Friday
 Partly Sunny then Chance Showers
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Friday Night
 Showers Likely
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Saturday
 Showers Likely
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Saturday Night
 Showers Likely then Chance T-storms
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Sunday
 Mostly Sunny then Slight Chance T-storms
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Sunday Night
 Partly Cloudy
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| Lo 73 °F |
Hi 87 °F |
Lo 69 °F |
Hi 83 °F |
Lo 70 °F |
Hi 83 °F |
Lo 70 °F |
Hi 85 °F |
Lo 68 °F |
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Tonight
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Partly cloudy, with a low around 73. West wind around 6 mph becoming calm in the evening. |
Thursday
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A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. High near 87. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. |
Thursday Night
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Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 1am. Mostly cloudy, with a low around 69. Light north wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. |
Friday
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A chance of showers after 2pm. Partly sunny, with a high near 83. Northeast wind around 6 mph. Chance of precipitation is 30%. |
Friday Night
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Showers likely, mainly after 8pm. Mostly cloudy, with a low around 70. Light east wind. Chance of precipitation is 70%. |
Saturday
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A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%. |
Saturday Night
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Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%. |
Sunday
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A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 20%. |
Sunday Night
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Partly cloudy, with a low around 68. |
Monday
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Sunny, with a high near 84. |
Monday Night
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Mostly clear, with a low around 66. |
Tuesday
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Mostly sunny, with a high near 84. |
Tuesday Night
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A slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 20%. |
Wednesday
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A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 40%. |
Forecast from NOAA-NWS
for Fort Myer VA.
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Weather Forecast Discussion
279
FXUS61 KLWX 191913
AFDLWX
Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
313 PM EDT Wed Aug 19 2026
.WHAT HAS CHANGED...
A Small Craft Advisory was issued for the southern portions of
the Chesapeake Bay for tomorrow afternoon as southerly winds
gust around 20 knots. The severe threat for Thursday continues
with SPC having a portion of the forecast area in a slight risk
for severe weather.
&&
.KEY MESSAGES...
- 1) Shower and thunderstorm chances return on Thursday
with precipitation chances lingering Friday and Saturday.
- 2) Numerous showers and thunderstorms Saturday with lingering
showers Sunday. Turning cooler and dry next week.
&&
.DISCUSSION...
KEY MESSAGE 1...Shower and thunderstorm chances return on Thursday
with precipitation chances lingering Friday and Saturday.
An isolated shower cannot be ruled out this afternoon, mainly over
the Shenandoah Valley although departing high pressure leads to
primarily dry conditions across the forecast area. Cloud cover
increases overnight as a cold front approaches from the Great Lakes
region. To the south, a stalled boundary draped over the Carolinas
drifts north as waves of low pressure traverse along it.
Precipitation chances increase overnight with showers possible
Thursday morning.
Convective chances increase throughout the day on Thursday as
shortwave energy tracks towards the mid-atlantic from the Ohio
river valley. There is uncertainty regarding the strength of
storms due to morning precipitation and location of the fronts
coinciding with peak daytime heating. Best chances for strong
to severe thunderstorms is along and east of the I-95 corridor
where the best conditions overlap. Here, SPC has a slight risk
for severe weather with damaging wind gusts, large hail, and a
brief tornado possible. Effective shear nearing 40 knots
combined with CAPE 2000 J/kg allows discrete cells to become
more organized into a line as storms track eastward. Confidence
is highest along and east of the I-95 corridor tomorrow
afternoon and into early the evening.
In addition to the severe threat, PWATS nearing and exceeding 2"
lead to an isolated flooding threat. Storms will be capable of
producing heavy rainfall but progressive storm motions should
limit flooding threat to sensitive areas.
KEY MESSAGE 2...Numerous showers and thunderstorms Saturday
with lingering showers Sunday. Turning cooler and dry for next
week.
The longwave pattern is forecast to amplify significantly this
weekend into next week as trough digs across the Great Lks and OH
Valley. This will drive a pair of cold fronts across the area Sat
and Sun providing focus for showers and thunderstorms. Saturday
looks like the more unstable day as we remain in WSW flow aloft and
with better forcing ahead of the trough axis. By Sunday, the first
cold front should have pushed the deep moisture and instability to
the south limiting the coverage and intensity of showers while the
trough axis moves overhead limiting the upper level forcing.
As trough axis shifts east of the area Sunday night, expect a cooler
and drying trend to start the new work week.
&&
.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
Winds remain out of the west/southwest this afternoon with
prevailing VFR conditions expected. Cloud cover and precipitation
chances increase across the terminals overnight although primarily
VFR conditions are expected through early Thursday morning. Morning
convection may impact MRB as showers and thunderstorms track across
western MD/eastern panhandle of WV. Showers and thunderstorms impact
the terminals Thursday afternoon with restrictions likely during
heavy precipitation. Highest chances for strong to severe
thunderstorms remains along and east of I-95 terminals. After
precipitation moves out of the area, low ceilings are possible
Thursday night into Friday.
Sct convection Sat through Sun.
&&
.MARINE...
Winds remain below Small Craft Advisory criteria through
Thursday morning. A Small Craft Advisory is in effect for the
southern Chesapeake Bay tomorrow afternoon. SMWs are possible
Thursday afternoon as strong to severe thunderstorms track
across the waters. Otherwise, non hazardous marine weather is
expected through the end of the week.
&&
.LWX WATCHES/WARNINGS/ADVISORIES...
DC...None.
MD...None.
VA...None.
WV...None.
MARINE...None.
&&
$$
DISCUSSION...AVS/LFR
AVIATION...AVS/LFR
MARINE...AVS/LFR
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