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Ruby Valley Field, Montana

Small airport in Madison County, Montana

Air quality

The air at Ruby Valley Field

Index 7, good, led by fine particles. Read at 12 AM from its reporting area, Dillon (MT), 28 miles off.

7Good
  • Fine particles (PM2.5)7Good-

The days ahead

Yesterday measured 21, good.

Smoke, the next 42 hours

No smoke near the ground through Sat 6 PM.

FriSat

Precipitation

What has fallen at Ruby Valley Field

None in the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Ruby Valley Field, the next 42 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

Airfield

Code
RVF
ICAO
KRVF
IATA
-
Field elevation
4,777 ft
Serves
Twin Bridges
Kind
Small airport
Scheduled service
No
Its own instrument
RVF
Wind now
From 140° at 8 mph, read 16 Oct, 00:55

Runways

RunwayLengthWidthSurfaceHeading, trueWind along it nowCrosswind now
07 / 25 unlit2,866 ft100 ftTurf84° / 264°4 mph head, on 077 mph from the right
17 / 356,000 ft60 ftAsphalt181° / 1°6 mph head, on 175 mph from the left
072517352,000 ftN140° 8 mph
Runways from their surveyed ends, north up, lengths and positions to scale; the rose in the corner is the wind now.

Measured here

What the airfield's own instrument measured, the last 24 hours

Every hour from Twin Bridges (RVF), Ruby Valley Field's own instrument, measure by measure, on the field's own clock.

Temperature

32 F at 12 AM; 54 F at its warmest, 4 PM Thursday, and 28 F at its coolest, 8 AM Thursday.

Now
32F
12 AM
Highest
54F
4 PM Thursday
Lowest
28F
8 AM Thursday
Temperature and Dew point at Twin Bridges, temperature from 27.8 to 53.6, the latest 32.0; dew point from 27.2 to 36.2, the latest 30.2, in degrees Fahrenheit.TEMPERATURE AND DEW POINTF20304050603 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16FREEZINGTEMPERATUREDEW POINT

How it is measured: Stevenson screen and siting, Field Book FB-INS-009

Humidity and dew point

A dew point of 30 F, the air 93% saturated; the humidity ran from 45% at 4 PM Thursday to 98% at 9 AM Thursday.

Dew point now
30F
12 AM
Humidity now
93%
Humidity, range
45 to 98%
Relative humidity at Twin Bridges, relative humidity from 45 to 98, the latest 93, in per cent.RELATIVE HUMIDITY%4060801003 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16

How it is measured: Humidity variables, Field Book FB-WAT-002

Wind

6 mph from the southeast at 12 AM; at its strongest 8 mph, 7 PM Thursday, and no gust reported.

Now
6mph
from the southeast
Strongest
8mph
7 PM Thursday
Highest gust
-
none reported
Wind at Twin Bridges, wind from 0 to 8, the latest 6, in miles an hour.WINDmph02.557.5103 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16
Wind direction at Twin Bridges, wind direction from 10 to 360, the latest 140, in degrees.WIND DIRECTION°0901802703603 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16

How it is measured: Coriolis as geometry, Field Book FB-ENG-008

Pressure

30.70 inHg at 12 AM, steady over 3 hours; 0.20 inHg higher than a day before.

Now
30.70inHg
12 AM
3 hours
-0.01inHg
steady
24 hours
+0.20inHg
Pressure, altimeter at Twin Bridges, pressure, altimeter from 30.50 to 30.71, the latest 30.70, in inches of mercury.PRESSURE, ALTIMETERinHg30.5030.6030.7030.803 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16

How it is measured: Hydrostatic balance, Field Book FB-ENG-003

Visibility

Down to 5 miles at 12 AM; 5 miles now.

Now
5mi
Lowest
5mi
12 AM
Hours under a mile
0
Visibility at Twin Bridges, visibility from 5.0 to 10.0, the latest 5.0, in miles.VISIBILITYmi02.557.5103 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16LIFRIFRMVFRVFR

How it is measured: Fog types, Field Book FB-WAT-020

Cloud base

The lowest cloud base came down to 2,500 ft at 6 AM Thursday; a base was reported in 5 of the hours.

Lowest base now
-
Lowest in 24 hours
2,500ft
6 AM Thursday
Hours with a base reported
5
Lowest cloud base at Twin Bridges, lowest cloud base from 2,500 to 4,800, the latest 3,000, in feet.LOWEST CLOUD BASEft2,0003,0004,0005,0003 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16MVFRVFR

How it is measured: Cloud classification, Field Book FB-SKY-001

Precipitation

None measured in the gauge in the last 24 hours.

Last 24 hours
0.00in
Wettest hour
-
Hours with some
0

How it is measured: ASOS, Field Book FB-INS-002

Twin Bridges: every reading, the last 7 days, 30 days and the year, and how well it reports

What is measuring near here

The 6 instruments nearest Ruby Valley Field, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now4 instruments

Twin BridgesRVF

At an airfield/0.2 mi away/4,756 ft/21 ft below here

temp, wind, gust, visibility, precip, pressure

Dillon Agrimet StationDWSM8

At a river or reservoir gauge/17.2 mi away/5,000 ft/223 ft above here

temp, wind, gust, humidity, pressure

Homestake PassMTHOM

Beside a road/27.1 mi away/6,342 ft/1,565 ft above here

temp, pavement temp, wind, visibility, precip

Table MountainS0808

At a soil climate station/39.2 mi away/4,474 ft/303 ft below here

temp, humidity, soil temp, soil moisture

measured daily2 instruments

Sheridan 1.4 ENEMT-MD-3

In a volunteer observer's own ground/8.3 mi away/5,399 ft/622 ft above here

precip, snowfall, snow depth

Dillon WmceDLLM8

At a cooperative observer's station/27.8 mi away/5,105 ft/328 ft above here

snowfall, snow depth, precip, high, low

-

Snow on the ground

Elsewhere in Montana

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Near Ruby Valley Field