Temperature
61 F at 12 AM; 76 F at its warmest, 2 AM Thursday, and 61 F at its coolest, 12 AM.
- Now
- 61F
- 12 AM
- Highest
- 76F
- 2 AM Thursday
- Lowest
- 61F
- 12 AM
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Washington Manassas Harry P. Davis Field, Virginia
Medium airport in Manassas city, Virginia61°
83°/57°
Overcast·
Feels like 61°·Light breeze 5 mph SSE
Coming up. Tomorrow is 28 degrees cooler: a high of 55° after 83° today.
Now. Washington Manassas Harry P. Davis Field is 61° and overcast at 12 AM. The dew point is 59°, so the air feels a little humid. Light breeze from the south-southeast at 5 mph.
Today and tonight. It warms to about 82° by 2 PM. Tonight falls to about 48° by 8 AM, with some cloud.
The week. The warmest day ahead is Wednesday, near 66°, and the coolest tomorrow, near 55°. Rain is likely tomorrow (54%). Frost is possible Sunday morning, a low of 36°.
The sky tonight. The sun sets at 6:31 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:28 PM. The next full Moon is Monday, Oct 26. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The day is 11 hours 12 minutes long, 2 minutes shorter than yesterday.
0UV Low
25Air quality
94%Humidity
100%Cloud
Now
12:00 AM
61feels61
12%
Today
Oct 16
8357
76%
14mph
Sat
Oct 17
5546
54%
16mph
Sun
Oct 18
5736
clear day
Mon
Oct 19
6037
13%
Tue
Oct 20
6541
10%
13mph
Wed
Oct 21
6644
mostly clear day
Thu
Oct 22
6444
mostly clear day
61°
83°57°
55°46°
57°36°
60°37°
65°41°
66°44°
64°44°
As of 12:00 AM in Washington Manassas Harry P. Davis Field, Virginia.
Air quality
The air at Washington Manassas Harry P. Davis Field
Index 25, good, led by fine particles. Read at 11 PM from its reporting area, Northern Virginia (VA), 13 miles off.
25Good
- Fine particles (PM2.5)25Good-
- Ozone15Good-
- Coarse particles (PM10)7Good-
The days ahead
Good each day through Sun Oct 18, led by fine particles. Yesterday measured 52, moderate.
GoodModerate
- 52YesterdayOct 14
- 33TodayOct 16
- 17SatOct 17
- 28SunOct 18
Smoke, the next 45 hours
Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.
Precipitation
What has fallen at Washington Manassas Harry P. Davis Field
0.02 in in the last 24 hours, and none in the 2 days before, to Thu 11 PM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.02in
- Last 3 days
- 0.02in
Visibility
How far you can see at Washington Manassas Harry P. Davis Field, the next 45 hours
Visibility stays 7 miles or more through Sat 8 PM, lowest 8 miles Fri 6 AM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- HEF
- ICAO
- KHEF
- IATA
- MNZ
- Field elevation
- 192 ft
- Serves
- Manassas
- Kind
- Medium airport
- Scheduled service
- No
- Its own instrument
- HEF
- Wind now
- From 180° at 5 mph, read 16 Oct, 00:14
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 16L / 34R | 6,200 ft | 100 ft | Asphalt | 151° / 331° | 4 mph head, on 16L | 2 mph from the right |
| 16R / 34L | 3,715 ft | 75 ft | Asphalt | 151° / 331° | 4 mph head, on 16R | 2 mph from the right |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from Manassas Muni(AWOS) (HEF), Washington Manassas Harry P. Davis Field's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 59 F, the air 94% saturated; the humidity ran from 65% at 11 AM Thursday to 97% at 11 PM Thursday.
- Dew point now
- 59F
- 12 AM
- Humidity now
- 94%
- Humidity, range
- 65 to 97%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
5 mph from the south at 12 AM; at its strongest 11 mph, 7 AM Thursday, and no gust reported.
- Now
- 5mph
- from the south
- Strongest
- 11mph
- 7 AM Thursday
- Highest gust
- -
- none reported
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
30.09 inHg at 12 AM, falling 0.05 inHg over 3 hours; 0.08 inHg higher than a day before.
- Now
- 30.09inHg
- 12 AM
- 3 hours
- -0.05inHg
- falling
- 24 hours
- +0.08inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
Down to 2 miles at 1 PM Thursday; 10 miles or more now.
- Now
- 10+mi
- Lowest
- 2mi
- 1 PM Thursday
- Hours under a mile
- 0
How it is measured: Fog types, Field Book FB-WAT-020
Cloud base
The lowest cloud base came down to 1,100 ft at 11 PM Thursday; a base was reported in 23 of the hours.
- Lowest base now
- 1,500ft
- Lowest in 24 hours
- 1,100ft
- 11 PM Thursday
- Hours with a base reported
- 23
How it is measured: Cloud classification, Field Book FB-SKY-001
Precipitation
0.01 in measured in the gauge, the most, 0.01 in, in the hour to 2 PM Thursday.
- Last 24 hours
- 0.01in
- Wettest hour
- 0.01in
- 2 PM Thursday
- Hours with some
- 7
How it is measured: ASOS, Field Book FB-INS-002
Manassas Muni(AWOS): every reading, the last 7 days, 30 days and the year, and how well it reports
What is measuring near here
The 4 instruments nearest Washington Manassas Harry P. Davis Field, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.
measured now2 instruments
At an airfield/0.1 mi away/194 ft/2 ft above here
temp, wind, gust, visibility, precip, pressure
Triangle - Prince William RAWSPWRV2
A remote fire weather station/13.4 mi away/229 ft/37 ft above here
temp, wind, gust, humidity, pressure
measured daily2 instruments
ManassasMNNV2
At a cooperative observer's station/1.4 mi away/256 ft/64 ft above here
snowfall, snow depth, precip, high, low
Bull Run 4.0 SWVA-PW-17
In a volunteer observer's own ground/2.7 mi away/286 ft/94 ft above here
precip, snowfall, snow depth
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in Virginia
16 places, each with its own forecast and its own instruments.
Near Washington Manassas Harry P. Davis Field
The nearest places, each with its own forecast and the instruments nearest it.
- Innovationcommunity, 2 mi
- Manassascity, 3 mi
- Buckhallcommunity, 3 mi
- Nokesvillecommunity, 3 mi
- Linton Hallcommunity, 4 mi
- Loch Lomondcommunity, 4 mi
- Bull Runcommunity, 4 mi
- Sudleycommunity, 4 mi
- Manassas Parkcity, 5 mi
- Yorkshirecommunity, 6 mi
- Gainesvillecommunity, 8 mi
- Cliftontown, 8 mi
Airports near Washington Manassas Harry P. Davis Field
- Warrenton Fauquier AirportHWY, 14 mi
- Washington Dulles International AirportIAD, 16 mi
- Davison Army Air FieldDAA, 18 mi
- Quantico Marine Corps Airfield / Turner FieldNYG, 19 mi
- Stafford Regional AirportRMN, 23 mi
- Culpeper Regional AirportCJR, 23 mi
- Leesburg Executive AirportJYO, 25 mi
- Shannon AirportEZF, 32 mi