Location & Surroundings
Lock 40 is a dam in Maryland, United States, at 97 m elevation. The nearest larger town is Halfway, 15 km to the north. The national capital Washington is 92 km to the southeast. The nearest airport is Needwood Farm Airport, 17 km away.
Also known as: Johnson's Lock
Overview
Lock 40 is dam in Washington County, Maryland, United States of America.
It is located in Washington County, United States.
Basic Data
- Country United States
- Located in Washington County
- Type dam (DAM)
- a barrier constructed across a stream to impound water
Geography
-
Coordinates
39° 29' 10" N, 77° 46' 39" W
- Elevation 97 m (DEM: 104 m)
- Timezone America/New_York
- Time Shift GMT -5 (DST -4)
Statistics & Country
- Pop. Density 17 p/km²
- Built-up 0.5%
- Settlement Very low density rural
- Currency Dollar (USD)
- Phone Prefix +1
Sun & Local Time
- Local time 13:08
- Sunrise 06:51
- Sunset 16:59
- Day length 10 h 8 min
Nearby
Alternate Names
Weather in Lock 40
Current conditions and a 3-day (72-hour) weather forecast for Lock 40, updated from the NOAA GFS model.
Now 5.8 C with overcast skies and a 6.1 m/s north-westerly wind. Next 24h: 2.0 to 9.1 C, max wind 7.0 m/s. No precipitation expected. Solar peaks near 318 W/m2.
Temperature
5.8 C
Wind
6.1 m/s NW (334 deg)
Humidity
84 %
Pressure
1,002.5 hPa
Clouds
100 %
Precip
0.01 mm
Solar
0.0 W/m2
UV-B
n/a
| Hour | Temp (C) | Wind (m/s) | Dir (deg) | RH (%) | Pressure (hPa) | Precip (step/total mm) | Clouds (%) | Solar (W/m2) | UV-B (W/m2) |
|---|---|---|---|---|---|---|---|---|---|
| NOW | 5.8 | 6.1 | 334 | 84 | 1,002.5 | - / 0.00 | 100 | 0.0 | n/a |
| 6h | 4.9 | 6.2 | 329 | 68 | 1,005.1 | 0.00 / 0.00 | 100 | 0.0 | n/a |
| 12h | 9.1 | 7.0 | 339 | 42 | 1,006.1 | 0.00 / 0.00 | 38 | 317.7 | n/a |
| 18h | 4.2 | 6.5 | 318 | 59 | 1,010.2 | 0.00 / 0.00 | 44 | 176.6 | n/a |
| Tomorrow | 2.0 | 2.7 | 298 | 70 | 1,011.2 | 0.01 / 0.01 | 88 | 0.0 | n/a |
| 30h | -0.6 | 3.3 | 297 | 87 | 1,013.4 | 0.00 / 0.00 | 5 | 0.0 | n/a |
| 36h | 7.7 | 8.2 | 308 | 49 | 1,013.4 | 0.00 / 0.00 | 100 | 281.9 | n/a |
| 42h | 5.4 | 6.1 | 300 | 73 | 1,017.6 | 0.06 / 0.06 | 100 | 86.9 | n/a |
| Sunday | 5.4 | 5.9 | 301 | 71 | 1,019.4 | 0.05 / 0.11 | 100 | 0.0 | n/a |
| 54h | 5.3 | 5.6 | 308 | 71 | 1,023.0 | 0.00 / 0.05 | 100 | 0.0 | n/a |
| 60h | 7.0 | 4.9 | 318 | 70 | 1,025.1 | 0.18 / 0.24 | 99 | 85.0 | n/a |
| 66h | 3.3 | 2.9 | 319 | 72 | 1,028.1 | 0.00 / 0.20 | 5 | 60.5 | n/a |
| Monday | 0.4 | 1.8 | 315 | 89 | 1,030.8 | 0.00 / 0.00 | 5 | 0.0 | n/a |
Source: NOAA GFS 0.25° (run 2026-11-13 06:00 UTC).
FAQ
What is the current weather and next 24-hour outlook in Lock 40?
Now 5.8 C with overcast skies and a 6.1 m/s north-westerly wind. Next 24h: 2.0 to 9.1 C, max wind 7.0 m/s. No precipitation expected. Solar peaks near 318 W/m2.
Is precipitation expected in the next 24 hours?
No measurable precipitation is expected in the next 24 hours.
When are sunrise and sunset in Lock 40 today?
Sunrise around 06:51 and sunset around 16:59 (local time). Day length about 10h 08m.
What is the local time in Lock 40?
Local time is 13:08. Time zone: America/New_York (UTC-05:00).
What type of place is Lock 40?
Lock 40 is a dam.
What is the elevation of Lock 40?
Elevation about 97 m. DEM 104 m.
Where is Lock 40 located?
It is at 39.48621, -77.77749 (latitude, longitude).
Which country is Lock 40 in?
It is in United States.
Links
- Wikidata entry Wikidata entry